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 zones.
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 or pipe.
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.
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.