A NEW TECHNIQUE FOR EVALUATING GOLD ANOMALY

摘要

A new geochemical method for evaluating gold anomaly in hydrothermal type gold deposit was presented. The basic principles of the method lies in that, (1) determing the paragenesis relationship between Au and the heavy minerals as pyrite, arsenopyrite, chalcopyrite, limonite, etc. to understand whether the gold exists in concentration state or not) (2) determing the contents of Au enclosed in separated quartz to identify roughly whether Au is enriched in original, hydrothermal liquid and to understand the geological condition of Au ore-formining. Based on those principles of geochemical explorations, Au anomaly evaluations, etc. were carried out. And an application example was introduced , which showed that using this method a gold deposit containing 200 g/t of Au was found in Xinjiang Uygur Autonomous Region and fifteen Au anomalies from Northwest China have been evaluated, indicating this method is accurate, efficient and of low-cost.