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Main deposit styles and associated tectonics of the West Junggar region, NW China

机译:中国西北部准Jung尔地区的主要矿床类型和相关构造

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The West Junggar region, located in the loci of the Central Asian Orogenic Belt, is a highly endowed metallogenic province with >100 tonnes Au, >0.7?Mt Cu, >0.3?Mt Mo, and >2.3?Mt chromite as well as significant amounts of Be and U. The West Junggar region has three metallogenic belts distributed systematically from north to south: (1) late Paleozoic Saur Au-Cu be (2) early Paleozoic Xiemisitai-Sharburt Be-U-Cu-Zn be (3) late Paleozoic Barluk-Kelamay Au-Cu-Mo-Cr belt. These belts host a number of deposits belonging to at least eight economically important styles, including epithermal Au, granite-related Be-U, volcanogenic massive sulfide (VMS) Cu-Zn, podiform chromite, porphyry Cu, hydrothermal quartz vein Au, porphyry-greisen Mo(-W), and orogenic Au. These deposit styles are associated with the tectonics prevalent during their formation. Five tectonic-mineralized epochs can be recognized: (1) Ordovician subduction-related VMS Cu-Zn deposit; (2) Devonian ophiolite-related podiform chromite deposit; (3) early Carboniferous subduction-related epithermal Au and porphyry Cu deposits; (4) late Carboniferous subduction-related granite-related Be-U, porphyry Cu, and hydrothermal quartz vein Au deposits; and (5) late Carboniferous to early Permian subduction-related porphyry-greisen Mo(-W) and orogenic Au deposits. Graphical abstract Display Omitted Highlights ? Three metallogenic belts are identified in the West Junggar region. ? At least eight types of mineralizations are developed in these belts. ? Five tectonic epochs from Ordovician to Permian and related mineralization.
机译:西准gar尔地区位于中亚造山带的所在地,是金矿资源丰富的省份,拥有> 100吨金,> 0.7?Mt铜,> 0.3?Mt钼和> 2.3?Mt铬铁矿,以及西准gar尔地区有3个成矿带,从北向南系统分布:(1)晚古生代Saur Au-Cu带。 (2)早古生代下米斯台-沙伯特Be-U-Cu-Zn带; (3)晚古生代Barluk-Kelamay Au-Cu-Mo-Cr带。这些带中有许多矿床,至少属于八种重要的经济类型,包括超热金,与花岗岩有关的Be-U,火山成块的大块硫化物(VMS)Cu-Zn,梯形亚铬铁矿,斑岩Cu,热液石英脉Au,斑岩- greisen Mo(-W)和造山金。这些沉积类型与构造过程中普遍存在的构造有关。可以识别出五个构造矿化时期:(1)奥陶纪俯冲相关的VMS Cu-Zn矿床; (2)泥盆纪蛇绿岩相关的坡状亚铬铁矿床; (3)早期与石炭纪俯冲有关的超热金和斑岩型铜矿床; (4)与石炭纪俯冲有关的花岗岩相关的Be-U,斑岩Cu和热液石英脉Au矿床; (5)晚石炭纪至早二叠纪俯冲有关的斑岩-格里森钼(-W)和造山型金矿床。图形摘要显示省略的突出显示?在西准gar尔地区发现了三个成矿带。 ?这些带至少有八种矿化类型。 ?从奥陶纪到二叠纪的五个构造时代及相关的成矿作用。

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