鄂拉山幔枝构造成矿与深部矿源  

The mineralization and deep mineral source of Ela Mountain mantle branch structure

作　　者：徐新文 段建华 路耀祖 史生清 

机构地区：[1]青海省核工业地质局.青海西宁810008 [2]青海省有色八队,青海西宁810008

出　　处：《矿产与地质》2017年第2期220-233,共14页Mineral Resources and Geology

摘　　要：文章研究了青海中东部鄂拉山幔枝构造成矿特征与成矿系列,统计分析鄂拉山幔枝构造区主要金银多金属矿床的硫、铅、氧同位素特征及区域上青海省金银多金属矿床的硫、铅、氢、氧、碳同位素特征。认为成矿物质主要来源于地球深部,有部分壳源物质加入;成矿热液主要为岩浆水,有天水和海水加入;成矿热液主要来源于印支期的花岗质岩浆。进一步分析了成矿物质从地球深部向地表的演化,初步建立幔枝构造的成矿模式。This paper has studied the mineralization characteristics and metallogenic series of Ela Mountain mantle branch structure in the central-east of Qinhai Province.The statistical analysis data of sulfur,lead,oxygen isotopic characteristics of the main gold and silver polymetallic deposits in the mantle branch structure zone of Ela Mountain range,and sulphur,lead,hydrogen,oxygen,carbon isotope characteristics of the gold and silver polymetallic deposits in Qinghai Province are collected and analyzed.We think that the ore-forming materials are mainly originated from the deep place in the earth.But there are some parts of the source material in the crust to join as well.The ore-forming hydrothermal fluid is mainly composed of magmatic water,but in definite there are also some rainwater and seawater to join.The ore-forming hydrothermal fluid is mainly originated from Indosinian granitic magma.Further this paper has analyzed the evolution of the ore-forming material from the deep place to ground surface on the earth.The metallogenic model has been established for the mantle branch structure as well.

关 键 词：幔枝构造成矿 金银多金属矿 同位素 深部矿源 成矿模式 青海鄂拉山 

分 类 号：P542.5[天文地球—构造地质学] P611[天文地球—地质学]