Exploration for porphyry-style copper mineralisation near Llandeloy

BOREHOLE 2 Registration Number STvI 82NE/3
Grid Reference SM 8526 2847
Height above O.D. 112 m
Casing to 3.35 m
Description of strata
Pleistocene
CLAY WITH PEBBLES:
FELDSPAR SAND AND CLAY: deeply weathered
MICROTONALITE, porphyritic: deeply weathered.
Variable content phenocrysts feldspar to 3 mm,
amphibole and uncommon quartz, biotite in very
f ine-grained ground mass. Quartz veinlets sparse
CLAY GOUGE:
MICROTONALITE, porphyritic: as above. First fresh
rock at 5.57, greenish grey. Xenoliths below 6.05.
Quartz veinlets rare. Pyrite sparse in fractures
QUARTZ: with epidote, chlorite, hematite, pyrite
MICROTONALITE, porphyritic: s above. Some
xenoliths porphyritic quartz-microdiorite. Veinlets
quartz, pink feldspar rare. Epidote with carbonate,
chlorite below 14.02. Pyrite in network fractures,
veins, disseminated, locally abundant. Chalcopyrite
in quartz-carbonate vein 17.00
QUARTZ-MICRODIORITE: medium grained, feldspathic
with sparse phenocrysts 3 m m plagioclase, hornblende.
Upper contact sharp, 45". Small xenoliths below
20.73. Quartz veins uncommon. Veinlets chlorite,
quar tz-chlorite, quar tz-carbonate occur throughout.
Epidote with pyrite veins 19.75-22.38, 23.90-24.42,
27.50. Intense epidotization 25.00. Pyrite disseminated,
veins locally abundant. Chalcopyrite in veins with
pyrite, 19.80, 22.77, 22.98. ?Autoclastic
brecciation, 22.80-28.07
QUARTZ-MICRODIORITE: as above. Some veins
carbonate, quartz. Pyrite sparse disseminated
and veinlets. ? Autoclastic breccia zone 29.27-29.70
QUARTZ-MICRODIORITE: as above. Upper contact
nearly parallel core. Network fracturing and breccia
veins locally. Pyrite in veinlets common below 29.60.
Chalcopyrite at 29.65, 30.07
QUARTZ-MICRODIORITE: as above. Sharp upper
contact. Brecciation at intervals. Pyrite sparsely
disseminated; veinlets with quartz, chlorite, carbonate
and some chalcopyrite
END HOLE