CHARACTERISTICS OF GOLD MINERALIZATION IN THE ERENHOT-ULANHOT REGION, EASTERN INNER MONGOLIA, CHINA
ZHAO Li-qing1,2, SUN Shi-hua2, XIAO Cheng-dong3, LEI Shi-bin4, MAO Qian2, FANG Cong-yi1
1. Gold Geological Institute, Langfang 065000, China; 2. Research Center for Mineral Exploration, Institute of Geology and Geophysics, CAS, Beijing 100029, China; 3. Tianjin Bureau of Geological Exploration, Tianjin 300181, China; 4. Gold Administration of China, Beijing 100102, China
Abstract：The studied area belongs to the Middle Paleozoic orogenic belt containing old block and reformed during Mesozoic era.Xilinhot Proterozoic complex with high Au and Sn content occurs in the region, also with Paleozoic ophiolites, suture belts, Permian volcanic rocks and large scale of Mesozoic magmatic activity and related polymetal mineralization.The types of gold mineralization are as follows:quartz-vein type and alteration rock type in shear zones; basic and ultrabasic intrusive rock hosted (high temperature) hydrothermal Fe-Cu-Au deposit;Yanshanian sub-volcanic rock hosted Cu-Zn-Au deposit and gold mineralization ass-ted with copper deposits, which are related to sub volcanic activity.In addition, sediment hosted Au-Sb mineralization and epithermal gold mineralization are also discovered and should be paid great attention to for exploration. Metallogenic ages include four intervals:242-229 Ma, 169-161.8 Ma, 132-159 Ma (mainly 130-140 Ma) and 127-109.2 Ma.
2004, Vol. 13 
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