GEOLOGICAL CHARACTERISTICS AND METALLOGENIC AGE OF THE LARGE SILVER-LEAD-ZINC DEPOSIT IN HALASHENG OF MANZHOULI AREA, INNER MONGOLIA
WANG Jing-xin1, XU Jia2, YU He3, SHU Guang-long2, FENG De-sheng4, SHI Jian-min2, SUN Zhen-jiang4
1. College of Earth Sciences, Guilin University of Technology, Guilin 541004, Guangxi Autonomous Region, China; 2. Shenyang Center of Geological Survey, CGS, Shenyang 110034, China; 3. Hezhou College, Hezhou 542899, Guangxi Autonomous Region, China; 4. No. 706 Team of Heilongjiang Geological Survey for Nonferrous Metals, Qiqihar 161031, Heilongjiang Province, China
Abstract：This Ag-Pb-Zn deposit is occurred in the Halasheng volcanic dome, with mineralization closely related to volcano-magmatism. The drilling and high-precision magnetic data show that the volcanic basement is the Ergunahe Formation, with subvolcanic body as the core of the dome and the volcanic-sedimentary cap rocks of Tamulangou and Manketouebo formations as ore-host rocks. The delineated 11 orebodies in the northeast of the dome are controlled by the N-S-trending extensional fault/fracture with steep occurrence. The four main orebodies are 500-1400 m long with an average thickness of 1-3 m and general depths of 500-900 m. The geochemical anomaly element assemblages from the rock body to surrounding rocks are in the order of Bi(-Pb-Ag-As-Mo)→Ag-Pb-Mo-Cu→Pb-Zn-As→Ag-Pb-Zn-Sb→Ag-Pb-Zn-Sb. The mineralized element associations are Cu (-Mo-Pb-Zn)→Pb-Zn-Ag→Pb-Ag in sequence. The wallrock alterations from inside to outside of the rock body are silicification→potash feldspathization→quartz sericitization→skarnization→chalcedonization→epidotization→chloritization→ carbonation successively. The zircon U-Pb isotopic age of 3 magmatic rock samples is 161-142 Ma. Combined with the research of regional typical deposits, it is believed that the diagenesis and mineralization occurred in Late Jurassic to Early Cretaceous with a metallogenic age of 142 Ma.
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WANG Jing-xin, XU Jia, YU He, SHU Guang-long, FENG De-sheng, SHI Jian-min, SUN Zhen-jiang. GEOLOGICAL CHARACTERISTICS AND METALLOGENIC AGE OF THE LARGE SILVER-LEAD-ZINC DEPOSIT IN HALASHENG OF MANZHOULI AREA, INNER MONGOLIA. GEOLOGY AND RESOURCES, 2019, 28(1): 18-24,97.
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2019, Vol. 28 
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