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giant Mineral deposits and Their Geodynamic Setting in the Lanping Basin, Yunnan, China

Acta Geologica Sinica(English Edition) 2004年第2期78卷 368-374页

作者： XUEChunji LIUShuwen CHENYuchuan ZENGRong ZHAOShihua collegeofEarthSciencesandResources Chang＇anUniversityXi＇anShaanxi710054 ChineseAcademyofGeologicalSciences Beijing100037 collegeofEarthSciencesandResources Chang＇anUniversityXi＇anShaanxi710054

There are giant mineral deposits, including the Jinding Zn-Pb and baiyangping ag-co-cu, and otherimportant mineral deposits (e.g., Baiyangchang ag-cu, Jinman cu deposits, etc.) in the Lanping Mesozoic-Cenozoic Basin, Yunnan Province, China. The tabular ore-bodies and some veins hosted in terrestrial clastic rocks of the Mesozoic-Cenozoic age and no outcropping of igneous rocks in the giant deposits lead to the proposal of syngenetic origin, but the giant mineral deposits are not stratabound (e.g. MVT, sandstone- and Sedex-type). They formed in a continental red basin with intense crust movement. The mineralization is controlled by structures and lithology and occurs in different strata, and no sedimentary nature and no exhalative sediments are identified in the deposits. The deposits show some relations with organic matter (now asphalt and petroleum) and evaporates (gypsum). The middle-low-temperature (mainly 110℃ to 280℃) mineralization took place at a depth of about 0.9 km to 3.1 km during the early Himalayan (58 to 67 Ma). The salinity of ore-forming fluids is surprisingly low (1.6% to 18.0 wt% (NaCl)eq). Affected by the collision of the Indian and Eurasian plates, the mantle is disturbed under the Lanping Basin. The large-scale mineralization is closely linked with the geodynamics of the crust movement, the mantle and mantle-flux upwelling and igneous activity. giant mineral deposits and their geodynamic setting are unique in the Lanping Basin.

关键词： giant Jinding Zn-Pb deposit giant baiyangping ag-co-cu deposit ore geology geodynamic setting Lanping Basin Yunnan Province China

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giant Mineral deposits and Their Geodynamic Setting in the Lanping Basin,Yunnan,China

Giant Mineral Deposits and Their Geodynamic Setting in the L...

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中国科学院地质与地球物理研究所2004学术年会

作者： XUE Chunji~1,LIU Shuwen~1,CHEN Yuchuan~2,ZENG Rong~1 and ZHAO Shihua~1 1 college of Earth Sciences and Resources,Chang’an University,Xi’an,Shaanxi 710054 2 Chinese Academy of Geological Sciences,Beijing 100037

There are giant mineral deposits,including the Jinding Zn-Pb and baiyangping ag-co-cu,and other important mineral deposits(e.g.,Baiyangchang ag-cu,Jinman cu deposits,etc.) in the Lanping Mesozoic-Cenozoic Basin,Yunnan Province,*** tabular ore-bodies and some veins hosted in terrestrial clastic rocks of the Mesozoic-Cenozoic age and no outcropping of igneous rocks in the giant deposits lead to the proposal of syngenetic origin,but the giant mineral deposits are not stratabound(***,sandstone- and Sedex-type).They formed in a continental red basin with intense crust *** mineralization is controlled by structures and lithology and occurs in different strata, and no sedimentary nature and no exhalative sediments are identified in the *** deposits show some relations with organic matter(now asphalt and petroleum) and evaporates(gypsum).The middle-low-temperature(mainly 110℃to 280℃) mineralization took place at a depth of about 0.9 km to 3.1 km during the early Himalayan(58 to 67 Ma).The salinity of ore-forming fluids is surprisingly low(1.6%to 18.0 wt%(NaCl)).Affected by the collision of the Indian and Eurasian plates,the mantle is disturbed under the Lanping *** large-scale mineralization is closely linked with the geodynamics of the crust movement,the mantle and mantle-flux upwelling and igneous *** mineral deposits and their geodynamic setting are unique in the Lanping Basin.

关键词： giant Jinding Zn-Pb deposit giant baiyangping ag-co-cu deposit ore geology geodynamic setting Lanping Basin Yunnan Province China

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