GCZ gold mineralization differs from previously announced gold mineralization at the High Grade Zone and the Gratien Zone in that gold is more widespread through broader panels of the host rock rather than concentrated in individual veins and stockwork
Drill holes were angled to cut across the main La Purisima Vein Zone where most of the historic workings are situated as well as a parallel Stockwork
Zone, the North Zone situated in a covered valley, and the Southwest Zone where complex quartz-calcite-barite veining was observed.
Reanalysis suggests this hole may have ended in a potential feeder zone for the Bottle Creek resource mineralisation, with up to 10% disseminated sulphides including pyrite, arsenopyrite, sphalerite, galena and chalcopyrite, abundant quartz stockwork
and intense structural deformation.
Grab samples from the boulder were reported to assay 8.99 oz/ton gold (279 g/t gold) and 2.9 oz/ton Ag within stockwork
quartz veining with variable amounts of chalcopyrite and sphalerite.
Evidence of significant hydrothermal alteration, stockwork
, breccias, geochemical anomalies and placer mining supports potential for Cu/Au porphyry systems and epithermal Au deposits similar to numerous multi-million-ounce Au and bulk tonnage Cu deposits ~40km away.
Non-stratified is divided into vertical vein, and massive stockwork
Sierra Metals announced that the development program at the Cusi Mine has confirmed a wide, high-grade silver stockwork
zone located within the Santa Rosa de Lima vein complex.
The Echassieres granitic complex includes an early W-bearing quartz-vein system, the so-called La Bosse stockwork
, and at least three successive granitic units that intruded into the micaschists of the PAU [12, 13].
It consists of stockwork
of fractures, veins and veinlets with no dominant orientations.
Also, the stockwork
on the post-'64 guns was not as good as on the earlier rifles, and the checkering was pressed rather than cut.