| 闽东大湾钼铍矿的辉钼矿Re-Os同位素年龄——兼论福建省钼矿时空分布及构造背景 |
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| 引用本文： | 赵芝,陈郑辉,王成辉,杨武平.闽东大湾钼铍矿的辉钼矿Re-Os同位素年龄——兼论福建省钼矿时空分布及构造背景[J].大地构造与成矿学,2012,36(3):399-405. |
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| 作者姓名： | 赵芝 陈郑辉 王成辉 杨武平 |
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| 作者单位： | 1. 国土资源部成矿作用与资源评价重点实验室,中国地质科学院矿产资源研究所,北京100037
2. 福建省地质调查研究院,福建福州,350013 |
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| 基金项目： | 中国地质大调查项目“南岭地区岩浆岩成矿专属性研究”，“我国重要矿产和区域成矿规律研究” |
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| 摘 要： | 闽东大湾钼铍矿是海西(海峡西岸)经济区新近勘查取得重要进展的燕山期钼矿之一。铍钼矿体主要赋存于上侏罗统南园组火山岩中,隐伏的黑云母花岗岩体为主要的成矿母岩,属中-高温热液充填-交代型钼铍矿床。辉钼矿的Re-Os同位素测年结果显示,等时线年龄为92.2±1.3Ma,表明钼矿成矿时代为晚白垩世。结合近年来福建省钼矿成矿年代学资料,发现自闽西(武夷成矿带)到闽东(沿海火山岩成矿带),钼矿成矿时代从165～102Ma过渡到112～90Ma,显示逐渐变新的趋势。综合分析认为,165～131Ma的钼矿可能形成于岩石圈伸展背景,110～90Ma的钼矿可能形成于古太平洋板块俯冲背景之下。
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| 关 键 词： | 辉钼矿 Re-Os同位素年龄 时空分布规律 闽东大湾 |
Molybdenite Re-Os Age of the Dawan Mo-Be Deposit, East Fujian——A Discussion on the Tempo-spatial Distribution and Tectonic Setting of the Molybdenite Deposit in Fujian Province |
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| ZHAO Zhi
,
CHEN Zhenghui
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WANG Chenghui
,
YANG Wuping.Molybdenite Re-Os Age of the Dawan Mo-Be Deposit, East Fujian——A Discussion on the Tempo-spatial Distribution and Tectonic Setting of the Molybdenite Deposit in Fujian Province[J].Geotectonica et Metallogenia,2012,36(3):399-405. |
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| Authors: | ZHAO Zhi CHEN Zhenghui WANG Chenghui YANG Wuping |
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| Institution: | 1.MLR Key Laboratory of Metallogeny and Mineral Assessment,Institute of Mineral Resources,Chinese Academy of Geological Sciences,Beijing 100037,China;2.Fujian Institute of Geology Survey and Research,Fuzhou 350013,Fujian,China) |
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| Abstract: | The Dawan molybdenum and beryllium deposit in the East Fujian province is one of the Yanshanian molybdenum deposits,which achieved great progress in geological and mineral exploration in West-strait Economic Zone recently.The deposit is hosted in volcanic rocks of the upper Jurassic Nanyuan Formation,while ore metals were mainly derived from the concealed biotite granite.It belongs to mesothermal to hyperthermal Mo-Be deposit.The Re-Os isochron age(92.2±1.3 Ma) of the molybdenites implies the mineralization took place in Late Cretaceous.Combined with Re-Os isochron ages of the molybdenum deposits in Fujian province,the mineralization ages decrease from 165~102 Ma in the west to 112~90 Ma in the east part of the province.We believe that the molybdenum deposits with ages of 165~131 Ma were mainly controlled by intraplate magmatism,however,the molybdenum deposits formed during 110~90 Ma were probably influenced by the subduction of the Izanagi plate. |
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| Keywords: | molybdenite Re-Os isotopic dating tempo-spatial distribution Dawan East Fujian |
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