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요약정보
西秦岭甘肃夏河—合作地区与中酸性侵入岩有关的金铜多金属成矿系统及找矿预测
Resource Type
Academic Journal
Authors
李康宁
;
贾儒雅
;
李鸿睿
;
汤磊
;
刘伯崇
;
严康
;
韦乐乐
Source
地质通报 / Geological Bulletin of China
. 39(8):1191-1203
Subject
西秦岭
早子沟金矿
成矿系统
找矿预测
Language
Chinese
ISSN
1671-2552
Online Access
Scopus
Find it @ DONGA
초록
甘肃夏河—合作地区岩浆岩与矿产分布具有分带性:夏河-合作断裂以北侵入岩规模较大,以岩基、岩株为主,发育Cu、Au、W、Mo、Pb、Zn等以中高温元素为主的矿化,受岩体边缘接触带及断裂双重控制;夏河-合作断裂以南侵入岩规模较小,多以小岩株、脉岩出现,发育Au、Hg、Sb等中低温矿化,受断裂破碎带控制.地球化学组成显示,该区侵入岩具有镁闪长岩、TTG岩套的双重特点,为"热壳"+"热幔"的壳幔结构,成矿条件极为有利.硫、氢、氧稳定同位素特征指示,成矿物质主要来自地幔岩浆析出的热液,后期有大气降水的参与.夏河—合作地区为与中酸性侵入岩有关的金铜等多金属矿成矿系统,在夏河-合作断裂以南,剥蚀较浅,可寻找远成低温热液型金、锑矿等,在其深部还应注意寻找斑岩型或矽卡岩型铜金矿床.而在剥蚀程度较高的北带,应以斑岩型和矽卡岩型矿床为主.
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