Mineralization Regularity Southeastern Yunnan Gold Bucket Month

Since discovery of the Carlin gold deposit Nevada in the United States in the sixties.The Carlin-type gold has become an important type of gold in the world and increasingly attracted the attention of geologists of all the countries. Due to Carlin-type gold deposits is the fine particle size of the gold, almost did not see the Ming gold.Can not use heavy concentrate to find mine. Unclear lines of the ore body and surrounding rock,so prospecting is more difficulty, at home and abroad are relying on geochemical anomalies and geological exploration combined method to find the Carlin-type gold. Geochemical looking for Carlin-type gold prospecting method, almost all of the Carlin-type gold deposits have significant geochemical anomalies.The Southeast Yunnan tectonic position at the junction of the Yangtze block and Cathaysia Massif, the western part of the Yangtze structural domain-Pacific tectonic domain, Kangdian ancient land southeast edge, south of North Vietnam old land, of the famous Carlin type gold deposits concentrated area, ore resources is rich, while much of the geological community concern. In our country recent years looking for one of the key areas of fine disseminated gold deposits, this article analyzes the regional metallogenic conditions background and consider geochemistry as a guide, focusing on the stratigraphic, tectonic, magmatic, alteration and soil geochemical exploration abnormal study, pointed out that the regional tectonics, stratigraphy, lithology, magmatism factors control gold mineralization, soil geochemical methods, delineation the five District geochemical anomaly, and the anomalous verification area of the field work, achieved good prospecting effect, looking fine disseminated gold deposits in the area and laid a good foundation.Detailed study of the geological characteristics of Crescent Gold, that Crescent Gold ore body is dominate by Weixi-Sheep Street-Miha-new factory anticline, Sheep Street-Walled syncline slope、 Poha-antimony mine anticline shaft portion toward the fault fracture zone control, along the strike of the fracture, unconformity surface in the form of filling and replacement, lenticular and stratiform output, and orebody is increase in the two sets of fault structure Interchange. Wealthy seam-bit is orebody Upper Permian the Nassau Group and Upper Permian Emeishan basalt group,orebodies prolific in both the contact zone. Au anomaly direct instructions and As, Sb, Hg, Ag anomaly indirectly indicate is an important sign of finding gold. Mineralization consists of two phases,one is the volcano-deposition stage, the second is the hydrothermal transformation stage. The characteristics of Douyue gold geochemical,selected the geochemical soil survey work in the area, soil geochemical anomalies given abnormal concentration centers of each element in good agreement.The use of1:10000soil survey results to broadly identify abnormal source location to determine the reason of unusual geological body. After abnormal verify, found six mines paragraph, indicate the successful working methods selected.Geochemical survey in prospecting in the gold mines of the region is positive effect, it is the important clues of post prospecting.