摘要
金管冲铀矿床位于湘东地区丫江桥黑云母二长花岗岩体接触带。通过成矿构造背景和矿床构造研究 ,本文系统论述了不同级别构造对铀成矿的控制作用 ,认为NNE向走滑断裂与铀成矿作用之间具有密切的成因联系。晚三叠世—侏罗纪时期的构造会聚走滑导致剪切重熔型花岗岩———丫江桥岩体的形成和成矿元素的富集。白垩纪—第三纪的构造离散走滑在矿区及其附近形成张扭性断裂和离散走滑盆地 ,这些断裂和盆地为成矿流体的运移。
The Jinguanchong uranium deposit is located at the contact zone of the Mesozoic Yajianqiao biotitic monzonite massif. Based on the study of metallogenic tectonic environment and structures of the deposit, this paper systematically expounds the controlling role of structures of different orders to uranium ore formation. It is suggested that there is close genetic relation between the NNE trending strike slip fault system and uranium ore formation. The structural convergence and strike slipping in Late Triassic Jurassic resulted in the formation of shearing remelting type granite--the Yajianqiao granitic massif, and the enrichment of ore forming elements. The structural divergence and strike slipping in Cretaceous-Tertiary caused the appearance of extensional shearing faults and divergence strike slip basins. Subsequently, these faults and basins provided favourable structural space for the migration, circulation of ore forming fluids and the precipitation of ore forming materials.
出处
《铀矿地质》
CAS
CSCD
2001年第5期273-279,共7页
Uranium Geology
