Exploration for porphyry-style copper mineralisation near Llandeloy
Exploration for porphyry-style copper mineralisation near Llandeloy Exploration for porphyry-style copper mineralisation near Llandeloy
PHYSICAL PROPERTY MEASUREMENTS ON BOREHOLE CORES Magnetic susceptibility kpparent susceptibility was measured with a 'Kappameter' at intervals of about one metre along the cores. Segments tested were unsplit and at least 100 mm long. True susceptibility was obtained by application of a factor dependent on core diameter. For accuracy better than 5% the diameter should be greater than 60 mm but at Llandeloy most core was either 50 or 25 mm in diameter, so somewhat greater errors are likely particularly in the higher susceptibility values. The detailed results are given in Table A4.1 Density Fourteen lengths of core were chosen to represent the main rock-types roughly in proportion to their occurrences in the eight boreholes. Each core was broken into 2 or 3 samples to provide a check. The samples were saturated with water under vacuum for 24 hours, then weighed in water (Ww) and in air (wale After drying in an oven for 48 hours, they were weighed in air again (Wd). Then: Saturated density ps = Wa/(Wa - Ww) Dry density pd = wd/(wa - Ww) Grain density pg = Wd/(Wd - Ww) Effective porosity = (wa - wd)/(wa - Ww) The results are presented in Table A4.2 Table A4.1: Magnetic Susceptibilities of Borehole Cores from Llandeloy, Dyfed Depths in metres Susceptibilities (K) in SI Units x 10-3 Borehole 1 (diameter of core 50 mm) Depth K Depth Borehole 2 (diameter of core 50 mm) Depth K Borehole 3A (diameter of core 50 mm) Depth K
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- Page 46 and 47: T/I~~/~~IPYS openjoi~~tcd limestone
- Page 48 and 49: Table 13 Summary statistics for sed
- Page 50 and 51: than average values quoted for sand
- Page 52 and 53: Introduction The main geophysical m
- Page 54 and 55: Figure 42 Contour map of apparent r
- Page 56 and 57: Figure 45 Contour map of tow magnet
- Page 58 and 59: Pigum? 47 Cumulative f reguency plo
- Page 60 and 61: it to this late propylitic alterati
- Page 62 and 63: HOLWSTER, V.F. 1974. An appraisal o
- Page 64 and 65: 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 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
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- Page 84 and 85: z ~ 1 ~ 1 ~ 1 ~ 1 ~ 1 APPARENT FEJS
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- Page 96 and 97: Borehole 8 (diameters of core 9-72
- Page 98 and 99: APPENDIX 5 COMPUTER MODELLING OF AE
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- Page 103 and 104: MRGNET I C: TIJTERF'HFTAT 1014 . .
- Page 105 and 106: ANU.YSB OF BOLPROLB CORE& TRACE ELE
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- 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 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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