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地质学报  2003 

冀北地区中生代金银多金属矿床成矿物质来源和深部过程探讨

, PP. 379-386

Keywords: 冀北地区中生代金银多金属矿床成矿物质来源深部过程成矿作用印支期燕山期内生矿床幔枝构造

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Abstract:

金银多金属成矿物质来源一直是成矿理论研究和找矿实践的热点问题。本文通过对冀北地区(指太行山北段、冀东和张家口―宣化地区)印支期―燕山期内生矿产近千个同位素数据统计认为:成矿物质源自地球深部,通过地幔热柱多级演化迁移到近地表并逐步就位、成矿。其同位素基本规律为:40个矿床的559个硫同位素数据中绝大部分值域为-5‰~5‰,均一化程度高,表明硫主要为岩浆硫;37个矿床200个铅同位素数据表现为矿质以幔源为主,确有部分壳源物质加入;34个矿床96个氧、氢、碳同位素数据统计表明,成矿流体应以岩浆水为主,兼有其他来源的水加入;地层不具有成矿专属性。

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