Epithermal Low Sulfidation Au-Ag Deposits

Epithermal gold (± silver) deposits form within active hydrothermal systems associated with volcanic activities. They characteristically form at shallow depths (< 1km) where the heat is supplied by volcanic activities and the fluids discharge as hot springs. They may also be part of a distal porphyry system.

Epithermal deposits are divided into  high sulfidation (HS) and low sulfidation (LS) types. The HS deposits occur in leached silicic rocks and are characterized by highly acidic fluids, whereas the LS deposits are characterized by reduced fluids of neural pH.

Common minerals associated with epithermal deposits include microcrystalline, drusy quartz or colloform silica, illite, smectite, and adularia. Specular hematite occurs at some depth and  goethite occurs near or at the surface.

PETROGRAPHIC REPORTS will include microscopic examination of thin sections with transmitted and reflected lights, detailed description of mineralogy and texture, classification of rocks where possible, visually estimated modal proportion of minerals, and description of primary and secondary minerals and their paragenetic sequence. In mineralized samples, the genesis of ore will be estimated. All reports will include 2 or more photomicrographs of each thin section taken by a digital Leica cooled camera, a cd with file(s) and 2 hard copies of the report.

Charay property, Sinaloa, Mexico. MUSGROVE MINERALS CORP.