Au Polymetallic Metallogenic Study Of Youjiang Area

Qian Xinan region is one of the important area that many Carlin-type gold deposits spread in, many people to do more work from it,for example : metallogenic background, structure, age and source of ore-forming fluid, etc., but for the ore-forming material sources disputed, there is no clear conclusion. Based on this, the subject of the article is the source of the mineralization, Lan Nigou gold deposit as the research object, and trace elements in the whole rock analysis, zircon dating, Sr and Pb isotope analysis to search for the source of ore-forming materials. Through this study, the following:1, Lan Nigou gold deposit and Qian Xinan region carlin-type gold deposits of the main ore formation for Bianyang and Xuman group of clastic rock, because of its unique sedimentary environment and sedimentary facies.2, Through the formation of trace element analysis in this area, we found that there is no strict correlations between the deposit and trace element, but the amount of the ore-forming elements in the clastic rock is higher than the carbonate rocks, and Au content in clastic rock over from near to far from the deposit distribution appeared from low to high.3, By regional formation and deposit of Sr, and Pb, S isotopic analysis of the test and comparison, the source of ore-forming materials in the Qian Xinan area is more complex, multi-layered, and not just from deep rocks, formation is one of the possible source of ore-forming materials.4,The contrast of the zircon age and the age of ore deposits in the area of research, diversified, Qian Xinan region sedimentary strata source emeishan basalt(zircon age 260 ma), is one of the main source area of Triassic sediment in the area. Triassic strata in the forming process of extraction of ore-forming elements, can provide some material for the formation of the epigenetic gold deposits.5, Through comprehensive studies have found that Carlin- type gold deposit source of ore-forming materials Qian Xinan area is not only limited to the deep concealed rock mass, and the Triassic strata is probably is one of the sources of ore-forming materials.