投稿时间：2015-05-29
修订日期：2016-08-25
网络发布日期：2016-10-29
中文摘要:文章在矿床地质特征研究基础上，首次确定了伊春火成岩带内的二股铁多金属矿床的成矿时代。结合前人研究成果，分析了伊春火成岩带早中生代金属矿床的成矿时限，成矿规律及找矿方向。金云母40Ar-39Ar同位素测年结果表明，二股铁多金属矿床的成矿年龄为（181.0±4.2）Ma。伊春火成岩带内早中生代金属成矿作用分为：早期（200~181 Ma）与二长花岗岩有关的矽卡岩型-热液脉型铁多金属矿床成矿作用；晚期（178~175 Ma）与花岗斑岩有关的斑岩型钼矿床成矿作用。晚三叠世—早侏罗世花岗岩类侵入岩（如二长花岗岩）与铅山组碳酸盐岩接触部位是伊春火成岩带内矽卡岩型-热液脉型铁多金属矿床成矿的有利部位。
Abstract:In this study, 40Ar-39Ar dating of the Ergu Fe-polymetalic skarn deposit was conducted, and the time, metallogenic regularity, and prospecting direction of the Mesozoic mineralization in Yichun igneous belt were studied. The results show that phlogopite from the Ergu deposit yielded an 40Ar-39Ar isochron age of (181.0±4.2) Ma. The Mesozoic mineralization in Yichun igneous belt can be divided into two episodes, i.e., the 200~181 Ma skarn-vein Fe-polymetallic mineralization related to monzonitic granite and the 178~175 Ma porphyry Mo mineralization associated with granite porphyry. It is held that the contact zone between the Late Triassic-Early Jurassic granitoids and the carbonate rocks of Qianshan Formation is favorable for skarn-vein Fe-polymetallic mineralization.
keywords:geochemistry 40Ar-39Ar dating igneous rock belt Ergu Fe-polymetalic deposit porphyry deposit skarn deposit Yichun
文章编号：
中图分类号：P618.31
文献标志码：
基金项目:本文得到国家自然科学基金项目（编号：41403042）和中央级科研院所基本科研业务费项目（编号：K1414）联合资助
引用文本：
欧阳荷根,车晓光,周振华.2016.伊春火成岩带二股矽卡岩型铁多金属矿床40Ar-39Ar年代学及其地质意义[J].矿床地质,35(5):1035~1046OUYANG HeGen,CHE XiaoGuang,ZHOU ZhengHua.2016.40Ar-39Ar dating of Ergu Fe-polymetalic skarn deposit in Yichun igneous belt and its geological implications[J].Mineral Deposits35(5):1035~1046
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