Exploration for porphyry-style copper mineralisation near Llandeloy

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E53163 F V W I V V v v v v v S t & t I t t i E 5 3 1 7 2 t t C 3 + I + t I l JW+ f l ' t - t t E5317341 1 t i E53174 t t t t E53175--++ I -t Quartz veln Acld tuff r. V P V v P V Volcanlc breccla Crystal tuff Sthstone '-- , ' //z$@@ -+ Base of weathered zone F Probable fault -1 lntrus~on breccla veln Jw r Base of zone wlth weathering along jolnts I 300 70 150 4 66 8 08 Lost water -+ 10 00 315 30 loo 392 *Hot HNO, extractable t Half detect~on 11m1t values s~~bstituted <strong>for</strong> levels less than the detect~on I~rnit Q Quartz C Chlonte Ah Alblte S Serlclte Mu Muscov~te E Epldote K K-feldspar - CHEMICAL ANALYSIS+ I P MAGNETIC SUSCEPTIBILITY PPr" % ppm % 0 10 ms 0 10 20 x10 SI ""Its C u i P b i Zn Fe ArlMo K20 senc~te-chlor~te- blotlte Senclte-chlonte (rare clmozo~s~te)
Q Q E C E CCt C E Ct C Q Ct CtQ C Q 8 54 Temporary loss of -+ 9 80 water 11 58 Lost-12 60 water CHEMICAL ANALYSIS P P ~ 1 % Cu Pb Zn Fe* 385 20 70 350 20 80 * Hot HN lo3 extractable Drift deposits Q Quartz sericrte-chlorite- Feldspar sand and clay Quartz vein E Epidote biotite wlth rare minor epidote Porphyritic microtonalite H Hematite sericite-chlorite Fig.21 c Chlorite BOREHOLE 2 Quartz rnicrod;znte ~t Carbonate ser~cite-chlorile- W -+ Base of weathered zone Cp Chalcopyrite magnetite with K K- feldspar blotlte ~n places F Probable fauir JW -+ Base of zone of weatherir~g A fresh amphibole along joints (A) rel~ct amphlbole ' Half detectlon llrnlt values subst~tuted <strong>for</strong> levels less than the detectlon lrrn~t I P MAGNETIC SUSCEPTIBILITY 0 20 40 ms 0 10 20 30 40 x lo's1 un~ts 1 I I 1
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Natural Environment Research Counci
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Report No. 78 @ Crown copyright 198
Page 9 and 10:
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
Page 66 and 67: BOREHOLE 2 Registration Number STvI
Page 68 and 69: BOREHOLE 3B Registration Number SM
Page 70 and 71: BOREHOLE 5 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: \ Fig.13. Compilation map of resist
Page 119 and 120: !2 CO N A 4 ul o ~n o ul 0 DEPTH IN
Page 121 and 122: Fig.25 BOREHOLE 5 C C C C Ct C E K
Page 123 and 124: Fig.27 BOREHOLE 7 E Q C Q E C 0 Q E
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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