04.08.2013 Views

Exploration for porphyry-style copper mineralisation near Llandeloy

Exploration for porphyry-style copper mineralisation near Llandeloy

Exploration for porphyry-style copper mineralisation near Llandeloy

SHOW MORE
SHOW LESS

You also want an ePaper? Increase the reach of your titles

YUMPU automatically turns print PDFs into web optimized ePapers that Google loves.

CRYSTAL TUFF: as above<br />

VOLCANIC BRECCIA: as above<br />

CLAY GOUGE:<br />

VOLCANIC BRECCIA: as above<br />

MICROTONALITE, porphyritic, as above. Pyrite<br />

sparse, disseminated<br />

SILTSTONE: thin beds, sandy and pebbly<br />

MICROTON ALITE, porphyritic: as above<br />

CLAY GOUGE: with lost core<br />

MICROTONALITE, porphyritic: as above, unweathered<br />

below 26.91. Phenocrysts feldspar 8 mm, amphibole,<br />

rare quartz in greyish-green matrix. Upper contact<br />

sharp, horizontal. Quartz veins at intervals.<br />

Pyrite sparse, disseminated with concentrations<br />

below 26.92<br />

MICROTONALITE, porphyritic: as above, sharp upper<br />

contact 50'. Network fractures at top, below 28.60,<br />

29.28-29.64 with quartz veinlets, chlorite. Pyrite<br />

abundant disseminated to 28.00, 29.28-29.64 and<br />

else where, also veins. Veins porphyritic micro-<br />

diorite below 29.80 richly pyritic<br />

MICRODIORITE, porphyritic: phenocrysts feldspar<br />

up to 8 mm, amphibole to 1 cm in green matrix.<br />

Sharp upper contact. Pyrite plentiful, disseminated<br />

and in hair fractures<br />

QUARTZ-MICRODIORITE: sparse phenocrysts feldspar,<br />

amphibole in medium-grained feldspathic rock.<br />

Some xenoliths sedimentary rocks, diorite. Upper<br />

contact broken. Grain-size reduces below 33.19; rock<br />

is porphyritic to 33.93, fine-grained non-porphyritic<br />

to base. Pyrite disseminated and in fractures with<br />

chlorite, locally abundant especially 3 1.80-32.47<br />

MICROTONALITE, porphyritic: as above, variable<br />

concentration phenocrysts. Network fractures,<br />

breccia with chlorite veinlets at intervals 35.09-38.27,<br />

42.97-44.91. Quartz veinle ts, rare carbonate. Epidote<br />

below 43.27. Pyrite disseminated, concentrated in<br />

fracture zones<br />

END HOLE

Hooray! Your file is uploaded and ready to be published.

Saved successfully!

Ooh no, something went wrong!