Abstract The Gaobanhe polymetal pyrite deposit is a SEDEX-type deposit hosted in a Mesoproterozoic sedimentary sequence in the central part of the northern margin of the North China Craton (NCC). The primary ore-forming age is the same as the formation age of the host rock. However, the SEDEX deposit was reworked by the Mesozoic hydrothermal process during the destruction of the NCC. Re-Os isotopic analysis for the reworked pyrite yields an isochron age of 152.3 ± 5.1 Ma, indicating that late hydrothermal activity had occurred during the late Jurassic. At the same time, some information on the sulfur isotopic composition and trace elements geochemistry suggest that the late hydrothermal fluid was most likely a mixture of magmatic and stratum-derived water. Moreover, the major components of pyrite indicated that the elements were released into the hydrothermal fluid from the syn-sedimentary pyrite. We infer that the regional folds and faults that formed during the Late Mesozoic disrupted the primary SEDEX deposit and created space for hydrothermal activity. The hydrothermal fluid reformed the primary ore bodies along the faults during the Late Jurassic.

中文翻译：

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华北高坂河多金属黄铁矿床热液再加工黄铁矿Re-Os年代学和微量元素特征及其地质意义

摘要 高坂河多金属黄铁矿矿床是位于华北克拉通北缘中部的中元古代沉积层序中的SEDEX型矿床。原生成矿时代与母岩的形成时代相同。然而，在 NCC 的破坏过程中，SEDEX 矿床被中生代热液过程重新加工。再加工黄铁矿的 Re-Os 同位素分析得出等时线年龄为 152.3 ± 5.1 Ma，表明晚侏罗世期间发生了晚热液活动。同时，关于硫同位素组成和微量元素地球化学的一些信息表明，晚期热液流体很可能是岩浆和地层水的混合物。而且，黄铁矿的主要成分表明这些元素是从同沉积黄铁矿中释放到热液流体中的。我们推断，中生代晚期形成的区域褶皱和断层破坏了主要的 SEDEX 矿床，并为热液活动创造了空间。热液流体在晚侏罗世沿断层改造了原生矿体。