Temporo-Spatial Distribution and Evolution of Ore Deposits in the West Sector of the Northern Qilian Mountains

查看全文 作　　者：MAO [1]Jingwen;ZHANG [1]Xiaoyu;ZHANG [2]Zhaochong;REN [3]Fengshou;ZUO [3]Guochao;ZHANG [4]Zuoheng;YANG [4]Jianmin;WANG [4]Zhiliang;YE [5]Dejin 机构地区：[1]Institute of Mineral Deposits, Chinese Academy of Geological Sciences, Beijing 100037;[2]Institute of Geology, Chinese Academy of Geological Sciences, Beijing 100037);[3]Gansu Bureau of Geology and Mineral Resources, Lanzhou, Gansu 730000;[4]Institute of Mineral Deposits, Chinese Academy of Geological Sciences, Beijing 100037;[5]Gansu Bureau of Geology and Mineral Resources, Lanzhou, Gansu 730000; 出　　处：《Acta Geologica Sinica(English Edition)》索引1999年第73卷第2期,共12页 摘　　要：The west sector of the northern Qilian Mountains is well-known for the Jingtieshan-type iron deposits. A new breakthrough has been made in prospecting for gold and copper in recent years. In this paper, the distribution characteristics of ore deposits in the study area are discussed from the viewpoint of tectonic evolution. It is suggested that there are 9 stages of mineralization from the Palaeoproterozoic to Indosinian. Four minerogenetic series and two minerogenetic subseries of ore deposits are recognized. Iron mineralization occurred in several stages, while most of the metals were accumulated in large amounts in the Caledonian. The enrichment and mineralization of gold is related to large-scale shear-strike-slip faults and the ascent and unloading of deep-seated fluids. 关 键 词：metallic deposit METALLOGENY minerogenetic series northern QILIAN MOUNTAINS