Gansu Yangshan Gold Deposit Geological And Geochemicalprospecting Model

Yangshan gold deposit is located in southern Gansu Province which is apart of "Sichuan, Shaanxi and Gansu Golden Triangle" area, and the Yangshan gold deposit is the largest deposit in China. Research and the establishment of Yangshan Gold Deposit geochemical prospecting model is important, to provide reference for our gold resource exploration and prospecting of Sichuan and neighboring Shaanxi and Gansu forecast. Based on the collected data and regional geological rock Yangshan gold deposit, mine rock, regional geophysical and geochemical stream sediment data, based on the geological characteristics of the deposit, and geochemical anomalies, to establish the Yangshan gold deposit geological- geochemical prospecting model.Addation to,in this paper, make a preliminary study of quantitative changes in Yangshan Gold trace elements during the rock weathering. The main conclusions are as follows: Yangshan gold deposit is a large deposit, located in Longnan City, county, state ore body was exposed. Ore-bearing formation is predominantly Devonian phyllite Sanhekou group. Granite porphyry mineralization and veins are closely related area, porphyry diagenetic age of about 200±9Ma. An ore bodies by Changhe- Guanyinba fracture control, mainly occur in the secondary shear zones or fracture in. The main types of ore phyllite type alteration and altered plagioclase porphyry vein type ore body morphology of the veins. Wall rock alteration mainly silicification, sericite of carbonation, mainly pyrite. Yangshan porphyry granite rock in comparison with China, obviously relatively rich Al2O3 and CaO, enrichment factor of 1.15 and 1.26. Yangshan plagioclase porphyry alteration compared to the Yangshan plagioclase porphyry, in terms of trace element enrichment factor of greater than 2.5 are elements Au, Co, Sb; that is, alteration or mineralization relative enrichment of Au, Co, Sb. Regional stream sediment geophysical and geochemical studies have shown that with respect to China in terms of stream sediments, Yangshan Gold deposit mainly enriched stream sediment Au, Sb, Hg, Cd, enrichment factor higher than 2.5, the enrichment factor of Au is 2.84. With the binding element geochemical anomaly analysis results show that the mining of gold mineralization indicates that the element composition of Au, Sb, Hg, Cd, Ba, Li, As count 7 elements. References empirical equations to describe trace elements behaviorsdue torock weathering,by which to make quantitative research of element in rock weathering processes in Yangshan, showing incompatible elements Li, Be, F appears in the mining area enrichment, hydrothermal ore-forming elements in Bi, Cd, As, Sb, Hg count five elements of the overall performance of a positive anomaly. Previously determined by regional geochemical characteristics of mineralization and geochemical analysis diagram indicating combinations of elements Au, Sb, Hg, Cd, Ba, Li, As.The establishment of Yangshan gold deposit geological and geochemical prospecting model based on the above studies.