安徽省休宁县清坑钼钨多金属矿床地质特征及成因探讨  

GEOLOGICAL FEATURES AND GENETIC DISCUSSION OF THE QINGKENG MO-W POLY-METALLIC ORE DEPOSIT IN XIUNING COUNTY, ANHUI PROVINCE

作　　者：汪永辉[1] 曹诚[1] 支利赓[1] 朱瑞[1] 董会明[1] 

机构地区：[1]安徽省地质矿产勘查局332地质队,安徽黄山245000

出　　处：《安徽地质》2016年第3期198-202,共5页Geology of Anhui

摘　　要：休宁县清坑钼钨多金属矿床,位于江南地块中的江南古隆起带内部的白际岭岛弧带,五里亭—长陔NEE向构造岩浆带南侧。矿区绢云母石英片岩,总体走向北东,倾向南东,NE向断裂规模较大,具逆冲和斜向逆冲特点。成矿母岩为晚侏罗纪世黑云母二长花岗岩,同熔型。燕山时期,江南陆内造山带形成于壳―幔相互作用等深部过程,随着祁门深大断裂伸展、冲断等转变,岩石圈减薄发生减压熔融,基性岩浆底侵在壳幔边界并使下地壳局部熔融产生中酸性岩浆。岩浆演化分异,钼在岩浆热液中富集,最终演化为含矿热液。随着应力转变,矿质析出,沉淀成矿。The Qingkeng Mo-W poly-metallic ore deposit, Xiuning County is located in the Baijiling island arc zone inside the Jiangnan old uplift belt of the Jiangnan landmass, to the south of the Wuliting-Changgai NNE- trending structural magmatie belt. Serieite quartz schist trends NE in general, dips SE, and the NE-trending faults are big, with thrusting and oblique thrusting features in the mineral district. Ore-forming parent rock is late Jurassic biotite monzonitic granite of syntectic type. The Jiangnan intracontinental orogen resulted from the deep process of crust-mantle interaction in the Yanshanian period. With extension and thrust of the Qimen deep large fault, lithosphere thinning led to decompression melting, basic magma underplating took place in the crust-mantle boundary and caused lower crust to melt locally producing intermediate-acid magma, which evolved and differentiated with Mo concentrating in the magmatic hydrothermal fluid, which finally developed into ore- bearing hydrotherm. With the change of stress, minerals separated out and precipitated to form ore.

关 键 词：钼钨矿 同熔型岩株 矿区 矿床特征 矿床成因 找矿标志 

分 类 号：P618.65[天文地球—矿床学] P618.41[天文地球—地质学]