摘要
马鞍桥金矿位于近ＥＷ 向展布的脆韧性剪切带内，该剪切带是区内最主要的控矿构造。在脆韧性剪切带形成之后侵入了早侏罗世的香沟花岗岩体，为成矿提供了主要的热力来源，促进了泥盆系矿源层中成矿物质的活化迁移。在成矿物质迁移过程中，由于受到泥盆系与石炭系地层平行不整合面附近脆韧性剪切带顶部碳质片岩和大理岩的屏蔽，成矿物质开始在脆韧性剪切带内的有利空间沉淀聚集。
The Ma'anqiao gold deosit is located in the E—W trending brittle ductile shear zone near the disconformity surface of Devonian and Carboniferous System, which is a major ore controling structure in the area. The Xianggou granite intruded after the formation of the shear zone in Early Jurassic(with 39 Ar? ? 40 Ar dating age of 200 Ma)would provide the heat to activate the ore forming materials in the Devonian rocks to be transported to the shear zone, where the impervious marble and carbonaceous schists on the top would act as a shield to prevent their further migration and gather them into gold deposit.
出处
《地质找矿论丛》
CAS
CSCD
1999年第3期71-77,共7页
Contributions to Geology and Mineral Resources Research
关键词
脆-韧性剪切带
控矿构造
成矿模式
金矿
brittle ductile shear zone
ore controling structure
ore forming model
gold deposits
