Exploration for porphyry-style copper mineralisation near Llandeloy

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Fig.26. BOREHOLE 6 Q Quartz Drlh deposlts E Epldote Feldspar sand and clay C Chlonte Gravel bed W+ Base of weathered zone F Probable fault V) W 1 a 5 $ CHEMICAL w ANALYSIS u n PPln O/o 3 6 Cu Pb Zn Fe* 9'5u100 10 50 490 Lost Wa1rr-b 10 97 *Hot HNO, extractable I - lntrus~on breccia vein ~JW -+ Weather~ng along joints to unknown depth * FRACTURING In fh~s borehole badly broken core may conceal lenyl~ts of network or other fractur~ng CHEMICAL ANALYSIS' +~alf detect~on llm~t values subs~tuted <strong>for</strong> senclte wit/] rare chlorite levels less than the detectron 11mtt (l~thology contrclled) ser~crte-chlorrte epidote MAGNETIC SUSCEPTIBILITY 0 10 20 30 xl0 SI unlts
Fig.27 BOREHOLE 7 E Q C Q E C 0 Q E QCt E C Q ECtC E E E E C E E O C E Q C H E E Q E E w v, " 2 gcnv, W k $ t; E q CHEMICAL z ANALYSIS z OwzZ CHEMICAL ANALYSIS' I u I a w _I 1 PP" 1961 a cn Cu Pb Zn Fe* 1 4 6 3 u 1 5 0 10 30 440 Lost -1 5 54 Water Soil 0 Drt ft deposlts Clay wlth lithic E and feldspar sand Gravel bed C Chlorite I I Acid lava Ct Carbonate W -+ Base of weathered zorle along joints to unkl~own depth 'JW * Weatlier~ng * Hot HNO, extractable Half detect~on lrm~t values -, substituted <strong>for</strong> levels less than the detectton l~rn~t Quartz sericite-chlorite Epldote -epidote-blot~te saussuriticed feldspar sorne fibrous arn~hibole sencite-chlorite with Hematite ep~dote in some rocks A fresh amph~bole 1 2 !i Kkir w 0 0 " g s MAGNETIC SUSCEPTIBILITY 0 10 20 3Ox10~Sl~rn1~
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Natural Environment Research Counci
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Report No. 78 @ Crown copyright 198
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SUMMARY REGIONAL STUDIES Intrusive
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SUMMARY Geological, geochemical and
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concluded that except for Zn the re
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The only rock containing evidence o
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Table 3 Analyses of miscellaneous r
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- 28 St. Brides Bay -
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Hercynian orogenies (M. 3. Arthur,
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Figure 14 Location of soil anomalie
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producing a very limited dispersion
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-1 00- Contours of VLF horizontal i
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area and periglacial and glacial de
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the Brunel Beds or the Tetragraptus
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contains sparse subhedral plagiocla
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There is some variation in the alte
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The cause of other isolated weak Cu
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j Table 9 Summary of analyses of in
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increase the Zr content. The divisi
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variation between pu8M microdioritn
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T/I~~/~~IPYS openjoi~~tcd limestone
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Table 13 Summary statistics for sed
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than average values quoted for sand
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Introduction The main geophysical m
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Figure 42 Contour map of apparent r
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Figure 45 Contour map of tow magnet
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Pigum? 47 Cumulative f reguency plo
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it to this late propylitic alterati
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HOLWSTER, V.F. 1974. An appraisal o
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APPENDIX 1 ABBREWATEI) BOREHOLB LOG
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BOREHOLE 2 Registration Number STvI
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BOREHOLE 3B Registration Number SM
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BOREHOLE 5 Registration Number SM 8
Page 72 and 73: BOREHOLE 6 Registration Number SM 8
Page 74 and 75: BOREHOLE 8 Registration Number SM 8
Page 76 and 77: SANDSTONE: as above CLAY GOUGE: SAN
Page 78 and 79: --- APPARENT ESISTIVITY pa IN OHM M
Page 80 and 81: APPARENT ESISTMTY H Bbs ys 06 q6 CH
Page 82 and 83: z ~ l ~ ~ ~ l ~ l . ~ l ~ , ~ l l A
Page 84 and 85: z ~ 1 ~ 1 ~ 1 ~ 1 ~ 1 APPARENT FEJS
Page 86 and 87: z ~ l $ l l l l l ~ l l ~ l l l l ~
Page 88 and 89: MAGNETIC FELD IN NAFTESLA Y /-*-.-.
Page 90 and 91: !IN@ a 8 g e s s I! s F N : , S ? I
Page 92 and 93: ~ N & E e 8 g B 8 8 7 a F N . S ~ 9
Page 94 and 95: PHYSICAL PROPERTY MEASUREMENTS ON B
Page 96 and 97: Borehole 8 (diameters of core 9-72
Page 98 and 99: APPENDIX 5 COMPUTER MODELLING OF AE
Page 101 and 102: RMS RESID - 6.53 FLU. PT ELEV ORS n
Page 103 and 104: MRGNET I C: TIJTERF'HFTAT 1014 . .
Page 105 and 106: ANU.YSB OF BOLPROLB CORE& TRACE ELE
Page 107 and 108: . Sample BH , Depthv ,(m); -, - . ~
Page 109: . , I , . . . . .. . , . , '," . ',
Page 112 and 113: Fig.7 Aeromagnetic anomaly map of t
Page 115 and 116: \ Fig.13. Compilation map of resist
Page 117 and 118: Q Q E C E CCt C E Ct C Q Ct CtQ C Q
Page 119 and 120: !2 CO N A 4 ul o ~n o ul 0 DEPTH IN
Page 121: Fig.25 BOREHOLE 5 C C C C Ct C E K
Page 125: 81 82 83 84 Fig.30. : Location of c
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Exploration for porphyry-style copper mineralisation near Llandeloy

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