0 m corresponds to pegmatite containing smoky quartz and arsenopyrite
Mineralization in hole TOG-13-25 is described as strongly albitized and silicified conglomerate and porphyry units containing 1 to 8 percent finely disseminated pyrite with local arsenopyrite
The surface composition of arsenopyrite
exposed to oxidizing environments.
The two most widely quoted hypotheses are the oxidation of Arsenopyrite
and Pyrite minerals and the reduction of Iron Oxyhydroxides.
The molds are composed of tiny black sphalerite crystals mixed with larger galena crystals up to 5 mm, coated by tin-white arsenopyrite
crystals on their inner surfaces.
grains were identified in the thin sections using SEM in the backscattered electron mode, and the FIB was used to prepare two sections for (S)TEM analysis from specified locations at the margins of two arsenopyrite
Between 80 and 85% of the gold occurs as free gold, the remainder being entrained within arsenopyrite
and other sulphide grains.
Mineralization is associated with siderite-albite veins and breccias with chalcopyrite, arsenopyrite
, pyrite, and their oxidized equivalents.
Relatively recent metallurgical advancements that will be investigated include the creation of an arsenopyrite
concentrate that could contain significant gold mineralization.
Assays of samples collected by Sovereign Gold from the mineralised high-grade sulphide vein (quartz, arsenopyrite
, pyrite and galena) ranged from:
COMINCO historical reports describe the Discovery Zone as an area of quartz-carbonate veining in argillite measuring 35 by 6 metres, carrying pyrite, arsenopyrite
, pyrrhotite, galena, sphalerite, chalcopyrite and minute particles of free gold.
Most environmental arsenic occurs naturally, appearing in deposits of minerals and ores including arsenopyrite
, enargite, and proustite.
Occurrence: A secondary mineral resulting from the alteration of arsenopyrite
WGC-11-34B (-70 degree dip at 90 degree azimuth) encountered vein quartz carbonate veins with arsenopyrite
and pyrite in two zones from 115.
It has been reported that arsenopyrite
gold concentrate grades of 150 g/t (5 oz) and higher are common, given the high-grade material that is processed.