Title: Geology and Metallogenesis of Daolundaba Copper Polymetallic Deposits,Inner Mongolia
Abstract: The Daolundaba copper polymetallic deposit is located in Xiwuqi,Xilinguole Union of Inner Mongonia. It lies on the west side of southern Daxing′anling ore belt,which is tectonically enclosed by the Siberian Block to the north,North China Block to the south and Songliao block to the east.The deposit is hosted by lower Proterozoic biotite amphibolite (Pt1by),upper Permian Linxi formation sandy slate (P2l) and the Hercynian Qianjinchang biotite granite. There are about 136 ore veins,striking NE and dipping south with angle varying between 20° and 50°. They are controlled by the NE to NEE-striking Mishengmiao anticlinorium as well as a series of secondary NE-,NEE-and nearly EW-striking faults along the contact zone between the Linxi formation and Qianjinchang granite.The alteration includes silicification,beresitization,carbonatization,chloritization,kaolinization,potassic alteration,greisenization,fluoritization and tourmalination. The silicification,greisenation and fluoritization are strongly related with the mineralization of the deposit. The major metallic minerals are pyrrhotite,pyrite,wolframite and cassiterite containing copper,zinc,tungsten and stannum. Detailed studies on wall rock lithology,structural control,magma evolution,alteration and mineralization style,ore mineral paragenesis have been conducted. Based on the detailed investigation,it is proposed that the Daolundaba copper polymetallic deposit is a typical mesothermal to high temperature hypothermal vein deposit. It is suggested that the Qianjinchang granite provides thermal driving force for the transport of the ore-forming material and the Linxi formation is the source of the metal.
Publication Year: 2009
Publication Date: 2009-01-01
Language: en
Type: article
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Cited By Count: 4
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