Geological Setting and Origin of Mo–W–Cu Deposits in the Honggor–Shamai District, Inner Mongolia, North China
Geological Setting and Origin of Mo–W–Cu Deposits in the Honggor–Shamai District, Inner Mongolia, North China
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DOI：
10.1111/j.1751-3928.2011.00171.x
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发表时间：
2011-10
期刊：
影响因子：
1.4
通讯作者：
F. Nie;Si-hong Jiang
中科院分区：
文献类型：
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作者：
F. Nie;Si-hong Jiang
近5年来，在内蒙古洪戈尔—沙迈地区共发现钼钨铜矿床21个。该区位于中亚造山带的查干—敖泊—敖酉—朝布伦构造岩浆带的中西部。区内钼钨铜矿床与中生代花岗岩体有关，以脉状、网状、浸染状等形式存在。这些新发现矿床的地质特征与世界各地的斑岩型矿床相似。确定了两个成矿事件：印支期（235-224 Ma）和燕山期（137-131 Ma）。认为洪戈尔—沙迈地区的这些矿床和远景与中晚三叠世印支造山运动的碰撞后伸展有关，但其中一些矿床与白垩纪岩浆液热液（燕山期）事件相关的矿化叠加有关。
Twenty‐one Mo–W–Cu deposits and prospects have been discovered in the Honggor–Shamai district, Inner Mongolia, north China during past 5 years. This district is located in the central and western parts of the Chagan Obo–Aoyoute–Chaobulen tectono‐magmatic belt, which is part of the Central Asian Orogenic Belt. The Mo–W–Cu deposits in the district are associated with Mesozoic granitoid intrusions and occur as veins, stockwork, and dissemination. The geological features of these newly discovered deposits are similar to porphyry‐type deposits worldwide. Two mineralization events have been identified: Indosinian (235–224 Ma) and Yanshanian (137–131 Ma). It is proposed that these deposits and prospects in the Honggor–Shamai district were related to the post‐collisional extension linked to the Indosinian orogeny during the Middle–Late Triassic period, but some of those deposits were overprinted by mineralization associated with the Cretaceous magmatic‐hydrothermal (Yanshanian) event.