黑龙江霍吉河钼矿床成矿时代及
岩石地球化学研究

资源与产业 ›› 2015, Vol. 17 ›› Issue (1): 48-55.

黑龙江霍吉河钼矿床成矿时代及岩石地球化学研究

杜晓慧1,*，张勇2

1中国地质图书馆，北京100083；2国土资源部成矿作用与资源评价重点实验室，北京100037

收稿日期:2014-06-03 修回日期:2014-11-05 出版日期:2015-02-20 发布日期:2015-02-20
通讯作者: 杜晓慧（E-mail： 531804132@qq.com）

METALLOGENIC EPOCH AND GEOCHEMISTRY OF HEILONGJIANGS HUOJIHE MOLYBDENUM DEPOSIT

DU Xiaohui1, *, ZHANG Yong2

1National Geological Library of China, Beijing 100083, China; 2Key Lab of Mineralization and Resources Assessment of MLR, Beijing 100037, China

Received:2014-06-03 Revised:2014-11-05 Online:2015-02-20 Published:2015-02-20

摘要/Abstract

摘要： 黑龙江霍吉河钼矿床为大型斑岩型矿床，矿体赋存在花岗闪长岩体内。成矿过程包括石英-黄铁矿、石英-辉钼矿、石英-多金属硫化物以及石英-碳酸盐4个阶段。在矿床地质特征研究的基础上，对矿石辉钼矿进行了ReOs同位素定年分析，获得模式年龄为1769±24～1787±24 Ma，加权平均值1776±11 Ma，等时线年龄1766±32 Ma，表明霍吉河钼矿床形成于早侏罗世晚期。含矿花岗闪长岩的硅含量较高，富碱，里特曼指数为219～378，A/CNK为105～112，属于弱过铝质高钾钙碱性系列。稀土元素分布形式呈右倾型，轻、重稀土元素分馏明显。微量元素总体显示相对富集Ba、Th、U等大离子亲石元素，亏损Nb、Ta、Ti、P等高场强元素。成岩成矿动力学背景为燕山早期古太平洋板块向欧亚大陆俯冲的陆缘弧。

关键词: 霍吉河钼矿床, Re-Os同位素测年, 全岩元素地球化学, 黑龙江

Abstract: Heilongjiangs Huojihe molybdenum deposit is a large porphyric deposit, whose ore bodies are hosting in granodiorite. Its mineralization process includes four states, quartzpyrite, quartzmolybdenite, quartzpolymetallic sulfides, and quartzcarbonate. This paper, based on its geology, acquired the model age of 1769±24-1787±24 Ma, averaged 1776 ±11 Ma，isochronic age of 1766±32 Ma by using ReOs dating, which reveals the deposit formed in the late of Lower Jurassic. The granodiorite contains a higher silicon, and rich alkaline, with Rittmann index of 219-378 and A/CNK of 105-112, belonging to a weakly peraluminous and highK calcalkaline series. The REE pattern shows rightoblique linear and a clear comparison between LREE and HREE. The trace elements are rich in Ba, Th and U large ion lithophile elements, and depleted in Nb, Ta, Ti and P high field strength elements, implying its metallogenic dynamic setting is related to the subduction continental arc of the paleoPacific Plate beneath the Eurasian Continent.

Key words: Huojihe molybdenum deposit, ReOs dating, rock geochemistry, Heilongjiang

中图分类号:

F205

杜晓慧，张勇. 黑龙江霍吉河钼矿床成矿时代及岩石地球化学研究[J]. 资源与产业, 2015, 17(1): 48-55.

DU Xiao-hui, ZHANG Yong. METALLOGENIC EPOCH AND GEOCHEMISTRY OF HEILONGJIANGS HUOJIHE MOLYBDENUM DEPOSIT[J]. Resources & Industries, 2015, 17(1): 48-55.

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