The majority of the gold occurs in arsenopyrite and to a lesser extent in pyrite and stibnite.
POLARIS PROJECT FREE
Free gold is extremely rare and to the end of 2005 had not been recognized in core samples. The sulphide minerals are very finegrained and disseminated in both the wall rock and early quartz and ankerite veins. Later stages of quartz-ankerite veining are barren and have the effect of diluting the gold grades in the structure. Arsenopyrite, pyrite and lesser stibnite were deposited with the alteration. The initial stage of quartz-ankerite introduced into the structure was accompanied by a pervasive hydrothermal alteration of the immediately surrounding wall rock. The mineralization consists of at least three stages of quartz veining. The transition from mineralized to non-mineralized rock occurs over a few centimeters. The vein mineralization has well marked contacts with the wall rock. In detail the “C” zones are arcuate structures. Up to 80% of the mine production was from “structural knots” or what is now known as “C” zones. The prominent strike directions are north-south and northwest-southeast, which is interpreted to be within a major shear zone. Gold values in the veins have remarkable continuity and uniformity and are usually directly associated with the amount of arsenopyrite present. Their walls pinch and swell showing considerable irregularity both vertically and horizontally. In general, the zones of mineralization ranging from 15 to 250 m in length with widths up to 14 m appear to have been deposited only on the larger and stronger shears. Alteration minerals include fuchsite, silica, pyrite, sericite, carbonate and albite. Stibnite is fairly abundant in some specimens but overall comprises less than one-tenth of 1% of the vein matter. The sulphide content is up to 10% with arsenopyrite the most abundant and pyrite the next important. The vein mineralization consists of arsenopyrite, pyrite, stibnite and gold in a gangue of quartz and carbonates. Mineralization of the New Polaris deposit bears strong similarities to many Archean lode gold deposits such as the arsenical gold camp of Red Lake, Ontario where the gold-bearing arsenopyrite is disseminated in the altered rock and in quartz-carbonate stringers. Past exploration studies have demonstrated that the New Polaris vein systems have all the attributes of the orogenic vein gold deposit including, but not limited to association with major structural break, quartzcarbonate vein association, low-sulphide assemblage of pyrite and arsenopyrite, chloritic and sericitically altered wall rocks and persistent gold mineralization over a vertical distance of nearly 1 km. Most mineralized zones are hosted by and always related to steeply dipping reverse- or oblique-slip brittle-fracture to ductile-shear zones. Mineralization may occur in any rock type and ranges in form from veins, to veinlet systems, to disseminated replacement zones. They are commonly associated with pyrite, arsenopyrite, tourmaline and molybdenite. The deposits are characterized by a high gold/silver ratio, great vertical continuity with little vertical zonation, and a broadly syn-tectonic time of emplacement. In general, it is quartz-vein-related, with associated carbonatized wall rocks. Llama la línea gratuita y confidencial 1-88:ĭenunciar casos de trata Conectarse con servicios en su localidad Pedir información o recursos en español sobre la trata de personas y la esclavitud moderna.The New Polaris deposit is classified as a mesothermal lode-gold deposit (Hodgson, 1993). To request training and technical assistance, general information or specific anti-trafficking resources. To connect with anti-trafficking services in your area or, We are not a government entity, law enforcement or an immigration authority.Ĭall us at 1-88 or text HELP or INFO to BeFree ( 233733). The NHTRC is a program of Polaris Project, a non-profit, non-governmental organization working exclusively on the issue of human trafficking.
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