Age and tectonic setting of the Jingangku Besshi-type volcanogenic massive sulfide deposit from the Northern Shanxi, North China Craton
Age and tectonic setting of the Jingangku Besshi-type volcanogenic massive sulfide deposit from the Northern Shanxi, North China Craton
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华北克拉通晋北金刚窟别子型火山成因块状硫化物矿床时代及构造背景
DOI：
10.1016/j.precamres.2020.105873
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发表时间：
2020-08
影响因子：
3.8
通讯作者：
Xie Mingcai
中科院分区：
文献类型：
--
作者：
Han Chunming;Xiao Wenjiao;Su Benxun;Sakyi Patrick Asamoah;Ao Songjian;Zhang Jien;Wan Bo;Song Dongfang;Zhang Zhiyong;Wang Zhongmei;Xie Mingcai
金刚库火山成因块状硫化物存款是中国最大的太古宙矿床之一。它位于华北中部造山带北方的五台绿岩带中。变形存款是在一套新太古代变质火山-沉积岩（云母石英片岩，斜长角闪岩，斜长石片岩和BIF）。矿体以块状黄铁矿为特征，并含有不同数量的黄铜矿、磁黄铁矿和闪锌矿。金刚库VMS矿围岩具有强烈的绿泥石化、硅化、绢云母化和碳酸盐化。以金刚库存款矿床为代表的VMS型黄铁矿和铜存款，其LA-ICP-MS锆石年龄为2500 ± 15 Ma（MSWD = 0.87）。另外两个VMS型黄铁矿和铜矿床以后坪和好地塘矿床为代表，形成于2494 ~ 2507 Ma之间。晚新太古代VMS矿床可解释为形成于弧前环境，随后在大陆碰撞期间在混杂岩带中被构造搬运，与日本较年轻的Besshi型矿床非常相似。硫化物矿体与磁铁石英岩的共生关系密切，认为二者具有相同的物质来源和形成时代，经历了相同的变形变质作用。因此，金港库存款很可能是由海底喷流沉积作用形成的，后来又受到变质流体的叠加改造。
The Jingangku volcanogenic massive sulfide deposit is one of the largest Archean deposits in China. It is located in the Wutai greenstone belt in the northern part of the central orogenic belt in the North China Craton. The deformed deposit is hosted in a suite of Neoarchean metamorphosed volcano-sedimentary rocks (mica-quartz schist, plagioamphibolite, plagioclase schist and BIF). The orebodies are characterized by massive pyrite, and contain varied amounts of chalcopyrite, pyrrhotite and sphalerite. The country rock of the Jingangku VMS ores shows intense chloritization, silicification, sericitization and carbonation. The VMS-hosted pyrite and copper deposit is represented by the Jingangku deposit that yielded a LA-ICP-MS zircon age of 2500 ± 15 Ma (MSWD = 0.87). The other two VMS-hosted pyrite and copper deposits are represented by the Houping and Haoditang deposits that formed between 2494 Ma and 2507 Ma. The late Neoarchean VMS deposits can be interpreted to have formed in a forearc setting, and subsequently tectonically transported in mélange belts during continental collision, quite similar to the younger Besshi-type deposits in Japan. Sulfide orebodies are closely associated with the magnetite quartzite, and therefore, it is proposed that both the sulfide and magnetite quartzite were derived from the same material source and have the same formation age, and underwent the same history of deformation and metamorphism. Consequently, the Jingangku deposit most likely formed from submarine exhalative sedimentation, and later superimposed and transformed by metamorphic fluid.
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影响因子：
5.8
作者：
D. Davis;Shoufa Lin
通讯作者：
D. Davis;Shoufa Lin
DOI：
--
发表时间：
1997-07
期刊：
Exploration and Mining Geology
影响因子：
--
作者：
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通讯作者：
G. Gale;M. Fedikow;L. Dabek
影响因子：
3.8
作者：
Kaiyi Wang;Jiliang Li;Jie Hao;Jianghai Li;Zhou Shaoping
通讯作者：
Kaiyi Wang;Jiliang Li;Jie Hao;Jianghai Li;Zhou Shaoping
影响因子：
1.4
作者：
J. Mortensen
通讯作者：
J. Mortensen
影响因子：
3.8
作者：
Guochun Zhao;S. Wilde;Peter A. Cawood;M. Sun
通讯作者：
Guochun Zhao;S. Wilde;Peter A. Cawood;M. Sun