Minerals Report - International Seabed Authority

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5. Biological Communities and Currents on Seamounts It is essential to understand the nature of biological communities that inhabit seamounts so that that information can be incorporated into environmental impact recommendations. It is also essential to understand the movement of water masses around seamounts so that appropriate mining equipment and techniques can be developed and dispersal routes of resuspended particles and wastes can be determined. Very few studies have addressed seamount currents and biology, especially the latter. Fe-Mn crusts occur on many different kinds of topographic features throughout the global ocean, but in this section, we concentrate on seamounts of the type that occur in the equatorial Pacific, where the most economically promising Fe-Mn crust deposits occur. Seamounts obstruct the flow of oceanic water masses, thereby creating a wide array of seamount-generated currents of generally enhanced energy relative to flow away from the seamounts. Seamounts interact simultaneously with large-scale currents, mesoscale jets and eddies, and tidal flows (115), the combined effect of which produces seamount-specific currents. Those seamount-generated currents can include anticyclonic currents (Taylor column), internal waves, trapped waves, vertically propagating vortextrapped waves, Taylor caps (regions of closed circulation or stagnant water above a seamount), attached counter-rotating mesoscale eddies, and others (e.g., 116). The effects of these currents are strongest at the outer rim of the summit region of seamounts, the area where the thickest crusts are found. However, the seamount-generated currents can be traced for at least several hundred meters above the summit of seamounts. Other water column features produced by the interaction of seamounts and currents are density inversions, isotherm displacement, enhanced turbulent mixing, and up welling; the latter process moves cold, nutrient-rich waters to shallower depths. Up welling increases primary productivity, which in turn increases the size and magnitude of the OMZ, and makes seamounts ideal fishing grounds. Seamount-generated currents also cause erosion of the seamounts (and Fe-Mn crusts) and move surface sediments, which produces sand waves and ripples. INTERNATIONAL SEABED AUTHORITY 226
Seamount height, summit size, types of ambient currents, and energy of the tidal currents determine which seamount-specific currents will be generated and their longevity. It is clear that some seamounts in the equatorial Pacific have been swept clean of sediment for most of 60 Ma, because that is the duration of crust growth in those areas, whereas other seamounts may be capped by as much as 500 m of carbonate sediment and therefore lack development of Fe-Mn crusts on the summit. These physical processes also affect seamount biology. Seamount communities vary from seamount to seamount, even communities from the same water depths on adjacent seamounts. This is partly the result of the varying physical processes in the water column. Most studies of seamount biology have concentrated on seamounts with a sediment cap and on the biological communities living on (epifauna) and in (infauna) that sediment (e.g., 117). Fewer studies have addressed communities dwelling on the rock outcrops, which consist of mostly attached (sessile) organisms. A few studies have looked at the types of organisms that live on the surface of Fe-Mn crusts, which consist predominantly of agglutinated foraminifera (e.g., 118). The bacterial or microbiological processes that may mediate the growth of Fe-Mn crusts and the concentration of trace metals have not been studied. Seamount biological communities are characterized by relatively low density and low diversity where the Fe-Mn crusts are thickest and cobalt-rich. This occurs because the low oxygen contents in the OMZ decrease the abundance of consumer populations, excludes most tolerant species from seafloor habitats, and can produce steep gradients in seafloor communities (119). Above and below the OMZ, the populations may be greater and more diverse. Levin and Thomas (120) found lower biological activity at the highenergy summit margin (covered by both rock and sediment) of the central- Pacific Horizon Guyot than at sediment-covered summit sites. In contrast, Genin et al. (121) found that antipatharian and gorgonian corals are more abundant in areas of seamount summits where flow acceleration is prominent. Thus, the make-up of the seamount communities and population density and diversity are determined by current patterns, topography, bottom sediment and rock types and coverage, seamount size, water depth, and size and magnitude of the OMZ, which in turn is related to primary productivity. INTERNATIONAL SEABED AUTHORITY 227
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Workshop on Minerals Other than Pol
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Published in Jamaica 2004 by the In
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Chapter 6* Impact of the Developmen
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PART 4 REGULATORY AND PROMOTIONAL F
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The Authority designates one of two
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deposits and gas hydrates of the co
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Prof. Chris German, Challenger Divi
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Mr. Sven Petersen, Research Associa
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SECRETARIAT Ambassador Satya N. Nan
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is to submit “an application that
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that was established to help protec
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on the continental margin. He state
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with the German firm Preussag. As p
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metre or metres of these black smok
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nodules in terms of these metals -
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Professor Herzig stressed however t
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While noting that the continuity of
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asal diameter at 1,600 m water dept
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discovery of the new hydrothermal s
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esearch cruises dedicated to ferrom
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global mid-ocean ridge system. He p
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athymetric map of the seafloor. A s
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were encouraging. In the course of
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that this matter was sensitive, he
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complete a preliminary evaluation o
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metals - nickel, cobalt, manganese,
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12. Issues to be taken into account
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entities. Many of them included min
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In this regard, the Secretary-Gener
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According to Dr. Vysotsky, as estim
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With regard to current knowledge ab
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Dr. Corbett gave a brief account of
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River resulting in the introduction
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Ms. Zaamwani pointed out that as th
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geochemical and geotechnical survey
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of its continental shelf through bi
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also stated, is similar to that of
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Chapter 7 Technical requirements fo
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Table 1: Classification of marine m
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Volcanogenic Metalliferous sediment
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deposits, including massive sulphid
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3. Marine Minerals Related to Deep
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The black smoker chimneys dischargi
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contain metals are present at discr
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Figure 4. A diagrammatic east-west
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and refining of these crusts is mor
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distances of hundreds of kilometres
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2) Deep ocean hot springs at massiv
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6. P.A. Rona, M.D. Hannington, C.V.
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25. M.J. Cruickshank (1998), Law of
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With regard to marine mineral depos
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Focussing on sites of sea floor min
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scientific journal "Nature". The su
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Professor Rona recalled that the in
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like St. Stephen’s in the Kremlin
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He noted that another product of ho
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The reasons why the Red Sea deposit
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a number of geothermal wells have b
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1. Introduction The discovery of hi
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0° 30° 30° 60° Explorer Ridge C
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3. Hydrothermal Convection At ocean
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Due to its increased buoyancy at hi
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5. Metal Contents Despite moderate
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(11.8 wt.%), and have high concentr
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Table 3: Size and Tonnage - Atlanti
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Local enrichment of more than 40 pp
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the Red Sea, Middle Valley, Explore
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Table 8: Advantages of Seafloor Mas
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60 kg Au) located on the neighbouri
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9. Perspective If further explorati
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3. J.M. Franklin, J.W. Lydon, and D
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19. R.A. Zierenberg, Y. Fouquet, D.
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35. J. Collier, M. Sinha (1990), Se
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53. P.M. Herzig, Y. Fouquet, M.D. H
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68. M.D. Hannington, J.M. Peter, an
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85. The New York Times (1997), Firs
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southern segment is a fast-spreadin
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Professor Herzig said that the spec
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Professor Herzig said that the depo
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Professor Herzig informed participa
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he informed participants that in ad
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In relation to Conical Seamount, Pr
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deposits is essential to reliably a
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would be removed from the deposit.
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CHAPTER 3 REGIONAL AND LOCAL VARIAB
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� Metallogenic provinces that are
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A digital map of ore-bearing region
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of the slopes in between 1500-3000m
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development there are areas with ma
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Regarding the formation of the firs
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SUMMARY OF THE PRESENTATION AND DIS
Page 184 and 185: the Juan-de-Fuca Ridge, the Guaymas
Page 186 and 187: Intensive investigations resulted i
Page 188 and 189: Based on the potential resources co
Page 190 and 191: It should be noted that other massi
Page 192 and 193: Generally, the massive sulphides or
Page 194 and 195: With regard to the gold values repo
Page 196 and 197: CHAPTER 5 COBALT-RICH FERROMANGANES
Page 198 and 199: Current patterns, topography, botto
Page 200 and 201: Table 1: Contents of manganese, iro
Page 202 and 203: INTERNATIONAL SEABED AUTHORITY 194
Page 204 and 205: Depth (km) 0 100 200 0 1 2 3 4 5 O
Page 206 and 207: sediment. Those thinly veiled crust
Page 208 and 209: Table 3: Cruises dedicated to the s
Page 210 and 211: today. Field studies by the USA, Ge
Page 212 and 213: Phosphorite and fresh basalt are st
Page 214 and 215: 3.2. Mineralogy The mineralogy of b
Page 216 and 217: Samples 25 20 15 10 5 0 Growth Rate
Page 218 and 219: 3.4. Chemical Composition All USGS
Page 220 and 221: elements associated with the detrit
Page 222 and 223: Sample/PAAS 100 10 1 0.1 0.01 0.001
Page 228 and 229: Phosphatization of the older Fe-Mn
Page 230 and 231: A. B. C. Mn FSM-Palau Marshall Isla
Page 232 and 233: 4. Iron-Manganese Crust Formation E
Page 236 and 237: 6. Resource, Technology and Economi
Page 238 and 239: MAJOR DIMENSIONS Length : 13 m Widt
Page 240 and 241: not economical, under the circumsta
Page 242 and 243: Based on grade, tonnage, and oceano
Page 244 and 245: 3. J.R. Hein and C.L. Morgan (1999)
Page 246 and 247: deep sea deposits, Report on the Sc
Page 248 and 249: 29. T. Moritani and S. Nakao (eds.)
Page 250 and 251: Angeles, CA, International Society
Page 252 and 253: geochemistry of Central Pacific fer
Page 254 and 255: 73. J.W. Moffett (1990), Microbiall
Page 256 and 257: 86. D. Puteanus and P. Halbach (54)
Page 258 and 259: 110. A Koschinsky and P Halbach (46
Page 260 and 261: 132. J.R. Hein et al. (1) 133. H.H.
Page 262 and 263: B. 14°30'N 14°20'N 14°10'N 160°
Page 264 and 265: Appendix 4. 1-m-diameter circular c
Page 266 and 267: economic potential in hydrogenetic
Page 268 and 269: Zealand Oceanographic Institute, th
Page 270 and 271: depths. Up welling increases primar
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Page 274 and 275: shallower than 1500 metres, a shall
Page 276 and 277: In relation to mining technology, o
Page 278 and 279: On the most promising sites for cru
Page 280 and 281: In addition to the International Se
Page 282 and 283: 1. Introduction Plant life is impos
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Table 1 Potential microbial metabol
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Figure 2 Simplified representation
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Figure 3 Major components of a gene
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the mussel's nutrition. When experi
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Reasons for this do not appear to b
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egions, one study pointed out that
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very widespread, supporting microbi
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Studies of the rapid colonisation o
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y mining, which is expected to be v
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2. J. B. Corliss, J. Dymond, L. Gor
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19. V. Tunnicliffe, A.G. McArthur a
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together with mucus that is secrete
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close to neutral ph conditions, it
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France, Germany, the United Kingdom
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of the sedimentary column, whereas
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Table 2: Research Submersibles and
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4. Technical Requirements For resea
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5. Processing Technologies The phys
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grow on substrate rocks because of
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5. M.D. Hannington, A.G. Galley, P.
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Dr. Herzig informed participants th
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search for sites of hydrothermal ve
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with such a grab. In addition to th
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Remotely operated vehicles (ROVs) D
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equired to make sure that the ship
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Dr. Herzig summarized the technical
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commercial. Since confidentiality o
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CHAPTER 8 FACTORS IN FINANCING EXPL
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The traditional project stages that
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there is a subset that forms in spe
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of competing for the attention of i
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7. Why SMS Mines will be Lower Cost
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8. Modelling SMS mining offers scop
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Because exhalative SMS deposits are
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flow to the metal markets. He also
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shortage in the next couple of year
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starts, the operation could take pl
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Based on this and other considerati
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Mr. Malnic said that the mining ope
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and silver. Except for volcanically
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2.2. Major Features of the Draft Of
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As a general principle the fiscal p
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I think the issue is not as simple
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Table 3: Data and information requi
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former case a reminder notice is se
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6. Elisabeth Mann Borgese, Ocean Go
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longer an area is held, more inform
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from the deep sea. One group of enz
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CHAPTER 10 NATIONAL AND INTERNATION
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times greater than atmospheric pres
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Fig. 2 Schematic diagram showing th
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Figure. 4: Distributions of hydroth
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Figure 6: Distributions of hydrothe
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Figure.8: Plot of incidence of hydr
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et al., 1998) - one of the two very
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seabed but, instead, are dispersed
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Figure 10: The Southampton Oceanogr
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oxide material, polymetallic sulphi
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Figure 13: TOBI sidescan sonar imag
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ACKNOWLEDGEMENTS I would like to ex
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15. Cronan D S (ed.) Handbook of Ma
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33. Gross G.A. and McLeod C.R., Met
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51. Jones H. A. and Davies P. J., P
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69. Manheim F. T., Composition and
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87. Muller, R.D., Roest, W.R., Roye
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107. Warren, J., Evaporites: their
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cultivating sulphide oxidising bact
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In relation to spreading rates at v
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coordination to actually get to go
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esources and to know whether or not
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ROVS, AUVs or submersibles to produ
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have oversimplified the case in his
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CHAPTER 11 A COMPARISON OF THE POSS
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This paper proposes to compare the
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• The distance between the mining
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economic value. Phosphatisation has
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The morphology of the mineral edifi
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Table 3: Geochemistry of known mass
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Detailed exploration has not been c
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flotation, can separate the ferroma
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The crushed and ground ore can be c
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3.2. Assumptions made for each kind
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alloys or even manganese ore in the
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ought the nickel price to a top. Th
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Because the metal market economy is
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14. J. -P. Lenoble (1992), Future d
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31. J. Francheteau, D. Needham, P.
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48. J. -P. Lenoble (1996), Les nodu
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66. J. -J. Prédali and J. -P. Polg
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classification system, Mr. Lenoble
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To recapitulate the sizes and possi
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proposed processing technologies an
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international community is only jus
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Part 2 ISSUES TO BE TAKEN INTO ACCO
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The Secretary-General said that the
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Mr. Nandan pointed out that the nex
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problems would resurface, because i
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prospecting would be more applicabl
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dimensional seafloor massive sulphi
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workshop, in relation to deposit ev
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an economic perspective, including
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sulphides and cobalt-rich ferromang
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CHAPTER 13 PETROLEUM POTENTIAL AND
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structure and filled with sediments
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Basin groups are subdivided into ty
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during the late Mesozoic-Cenozoic s
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Figure 4: Volume density of initial
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ITIPRHC = Vnr φHC γ 103 (Mmtoe),
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Table 1: Offshore (deepwater) initi
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Speaking about particular geographi
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World Ocean, including areas off no
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Table 4: Largest oil and gas discov
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The extremely harsh environment bro
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In other regions of the world, enco
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REFERENCES 1. L.G. Weeks (1971), Ma
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SUMMARY OF PRESENTATION AND DISCUSS
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Dr. Vysotsky said that estimates of
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In Southeast Asia, Dr. Vysotsky spo
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Philippines, and possibly Brazil. W
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and we shall encounter severe deple
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In the 1960's scientists discovered
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Figure 2. Worldwide locations of kn
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methane by bacteria in an anoxic en
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It has been assumed that the struct
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identification of gas hydrate in ma
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ottom simulating reflections (BSR)
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Figure 6: Interpretative plot of hy
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floor have indicated the presence o
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of free gas below the BSR is usuall
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sediment and to provide an indicati
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6. Harvesting methane hydrates -Som
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deposits can be commercial, even in
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at a catastrophic scale. Some of th
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Figure 8. Development of hydrate re
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This is perhaps due to the percepti
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would provide Japan with methane fo
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NOTES AND REFERENCES 1. E.D. Sloan
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20. R.F. Meyer (1981), Speculation
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Master Workshop on Gas Hydrates: Re
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60. M.D. Max and M.J. Cruickshank (
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is that their exploitation might re
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further pointed out that even if on
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Dr. Desa also informed participants
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thickness of the sediments, the thi
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pressure at sea level leads to hydr
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aware of any studies of natural ear
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CHAPTER 15 A CASE STUDY IN THE DEVE
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NAMIBIA L W OR CT BOTSWANA SOUTH AF
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The Orange River, one of Africa’s
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formation of a large accretion coar
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The deep-water ore body more closel
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4. The mineral resource management
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deployed on a MacArtney FOCUS 400 R
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Utilising Jago has made very detail
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Although at first glance the nature
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to levels capable of sustaining sea
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In accordance with De Beers’ over
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ACKNOWLEDGEMENTS I thank my many co
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16. I.B. Corbett (1989), The sedime
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eroded during regression and transg
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diamond mining business. Dr. Corbet
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technological step, Dr. Corbett sug
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and Ore Reserves (JORC). He also sa
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With another slide, Dr. Corbett sho
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of De Beers’ deepwater operation
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system that allows other functions
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CHAPTER 16 A CASE STUDY IN THE DEVE
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change through heat transport and c
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Main sites of oxygen minimum Flow o
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• Undertake necessary mitigatory
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State, by such spilling or pollutio
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including diamonds, from non-fluore
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agreements require that government
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including current velocities, oxyge
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ackground levels and confined to a
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Sonar equipment used on some DBM ve
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advocated this approach for environ
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local geology, sedimentology and mi
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Levene’s test could also be used
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unquestionably be alarming, and the
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3.4 Future Innovation in Video Tran
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sponges and bryozoans to more gener
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esearch contributions of Mark Gibbo
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16. Craig R. Smith (1998), The Biol
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magellanicus, Gmein) populations. J
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presentation he would show that kno
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process of self-regulatory checking
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initial mining, but that within a v
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continental shelf. He suggested tha
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would result in the extermination o
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The participant from Saudi Arabia r
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of the Namibian government would be
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With the exception of the West Paci
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1.3 Resources The oceanic regions o
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2 Physiography of the Ocean Floor a
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INTERNATIONAL SEABED AUTHORITY 674
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partially separated continental fra
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occur beneath the continental shelf
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Using these criteria, a number of a
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3.3 Methods used to assess resource
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4.1.2 How marine placer deposits ar
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to survive the transgression are pr
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4.2.2 Where marine phosphorite depo
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sedimentary layers that are favoura
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4.4 Marine Polymetalic sulphides 4.
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4.4.4 Resource potential of marine
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The most up to date information of
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Manganese crusts that are rich in c
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(3) where bottom currents are effec
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There are four elements are of econ
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averaging 2kg/m 2 . These contain e
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520 million tonnes of copper”. In
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Elemental resources for the top ten
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natural gas is commonly formed in a
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These areas are almost exclusively
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Table 5 (with reference to Figure 2
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with the term “resource” used e
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Similarly, much of the continental
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Although this is not an assessment
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A qualitative indication of resourc
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4.7.2 How marine gas hydrate deposi
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However, this does not include the
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Figure 28 shows the location of are
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ELCS region Location Hydrate potent
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Franklin Seamount, western Woodlark
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Emery K. O. and Noakes L. C., Econo
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Herzig, P.M. and Hannington M. D.,
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Kvenvolden, K.A., Gas hydrates as a
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Meyer, R.F., Speculations on oil an
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Scott, S.D., Seafloor polymetallic
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Evaporite deposits http://www.black
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these areas cover something like 25
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continental margins. He mentioned p
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programme off Nankeen, Japan, and t
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een happily persuaded in the other
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Part 4 REGULATORY AND PROMOTIONAL F
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own Namdeb. In addition, there are
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The stated purpose of the Minerals
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programme and specified minimum exp
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them to give proper attention to ea
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evaluation purposes in monitoring t
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as far as the development of minera
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Ms. Zaamwani said that the main leg
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Ms. Zaamwani told participants that
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the Ministry could benefit, as is c
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understaffing do not currently util
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One participant recalled that Ms. Z
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vessels there are sophisticated sec
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Ms. Zaamwani was asked about regula
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70° 60° NORTH SEA -30° -20° -10
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of 9.6 billion Sm 3 oil equivalents
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Nor does it give rights or priority
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1 4. Data Management All data relat
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possibility to evaluate the results
Page 808 and 809:
planning of future activities. The
Page 810 and 811:
SUMMARY OF THE PRESENTATION ON THE
Page 812 and 813:
in the Barents Sea there is still a
Page 814 and 815:
period that can last up to ten year
Page 816 and 817:
conditions in these areas, as well
Page 818 and 819:
designated by the Ministry. She sai
Page 820 and 821:
quantity of data involved in the in
Page 822 and 823:
operation (PDO) is normally prepare
Page 824 and 825:
to the data when an area is relinqu
Page 826 and 827:
CHAPTER 20 STATUS REPORT ON THE DAT
Page 828 and 829:
All the above-mentioned minerals oc
Page 830 and 831:
e water depths between 400 and 1,00
Page 832 and 833:
As far as the Government is concern
Page 834 and 835:
• Ordinance number 195, of Decemb
Page 836 and 837:
This tax must be paid up to January
Page 838 and 839:
the one whose burning is authorised
Page 840 and 841:
ANP may send a representative to fo
Page 842 and 843:
esources other than oil or natural
Page 844 and 845:
to the safety of persons and animal
Page 846 and 847:
found offshore Brazil. With regard
Page 848 and 849:
een discovered in the basin, includ
Page 850 and 851:
enhance oil recovery. He said that
Page 852 and 853:
g. Ordinance number 10 that regulat
Page 854 and 855:
He said that the environment has to
Page 856 and 857:
ids. These comprised five Brazilian
Page 858 and 859:
After oil exploration gained moment
Page 860 and 861:
Those who are entitled to the land
Page 862 and 863:
and replaced by the President, and
Page 864 and 865:
(ii) Assure the safety of navigatio
Page 866 and 867:
explorations may continue concurren
Page 868 and 869:
Appoint an authorized representativ
Page 870 and 871:
The contractor will recover all ope
Page 872 and 873:
of US dollar... (negotiable) within
Page 874 and 875:
Processing of products is subject t
Page 876 and 877:
are more than 30 articles in the va
Page 878 and 879:
Page 880 and 881:
Ambassador Djalal informed particip
Page 882 and 883:
production-sharing contracts became
Page 884 and 885:
said that the remainder of the prod
Page 886 and 887:
and cooperation with Pertamina and
Page 888 and 889:
A participant wanted to know whethe
Page 890 and 891:
of CCOP/SOPAC was to promote and de
Page 892 and 893:
STAR was founded in 1985 in collabo
Page 894 and 895:
Since 1972, SOPAC has, on behalf of
Page 896 and 897:
France Seapso 1985-1986 Cook Is, Fi
Page 898 and 899:
polymetallic massive sulphides. The
Page 900 and 901:
crusts have also been found in area
Page 902 and 903:
Figure 2: Location Map of Known Pol
Page 904 and 905:
is currently no regional agency tas
Page 906 and 907:
The types of data that have been in
Page 908 and 909:
A new agreement between Japan and S
Page 910 and 911:
SOPAC’s continuing and relentless
Page 912 and 913:
deposits will be mined at some poin
Page 914 and 915:
REFERENCES 1. D. Tiffin and C Matos
Page 916 and 917:
18. J. Malnic. (1999). Marine Miner
Page 918 and 919:
8. Individual nations should develo
Page 920 and 921:
SUMMARY OF THE PRESENTATION ON THE
Page 922 and 923:
With regard to the name of the orga
Page 924 and 925:
the benefit that had accrued to the
Page 926 and 927:
The discussions that followed Mr. S
Page 928:
About the International Seabed Auth
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Minerals Report - International Seabed Authority

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