中国科技核心期刊
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西秦岭德乌鲁—美武地区中生代岩体年代学、地球化学特征及与成矿关系研究
- 作者：
- 何彤彤|华永成|逯文辉
- 作者单位：
- 甘肃省地质矿产勘查开发局第三地质矿产勘查院|甘肃省地质矿产勘查开发局第三地质矿产勘查院|甘肃省地质矿产勘查开发局第三地质矿产勘查院
基金项目：
- 国家重点研发计划项目（2017YFC0601506）；中国地质调查局项目（121201004000160901）
详细信息：
- 作者简介：
- 何彤彤（1986—），男，甘肃通渭人，工程师，硕士，从事区域地质调查与矿产勘查工作；兰州市七里河区兰工坪路121号，甘肃省地质矿产勘查开发局第三地质矿产勘查院，730050；E-mail：328893081@qq.com
- 通讯作者：
- isnull
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Study on characteristics of chronology,geochemistry of the Mesozoic rock mass and metallogenic relationship in the Dewulu-Meiwu area of West Qinling
- English Author：
- The Third Institute of Geological and Minerals Exploration,Gansu Provincial Bureau of Geology and Minerals Exploration and Development|The Third Institute of Geological and Minerals Exploration,Gansu Provincial Bureau of Geology and Minerals Exploration and Development|The Third Institute of Geological and Minerals Exploration,Gansu Provincial Bureau of Geology and Minerals Exploration and Development
- Unit：
- 摘要
- 在线预览
- 参考文献
摘要:
西秦岭是中国内生矿床的重要成矿带之一，目前已经查明的有铜、钼、铅、锌、金、银等多金属矿床数百个。对西秦岭中部德乌鲁岩体与美武岩体进行锆石U-Pb测年，结果分别为241.6 Ma±5.3 Ma和237.0Ma ±3.3Ma，属于中生代早期。地球化学研究结果显示，岩石具有过铝质钙碱性S型花岗岩特征，轻稀土富集，重稀土亏损，具有明显的Eu负异常特征。结合区域构造背景，认为中生代早期，德乌鲁—美武地区经历了由挤压向伸展的转换，伴随强烈岩浆活动，为西秦岭提供了大量的花岗质岩浆与成矿物质。
关键词:
锆石U-Pb测年；地球化学特征；构造环境；成岩成矿关系；德乌鲁—美武地区
Abstract:
The West Qinling is one of the important metallogenic belts of endogenic deposit in China,where hundreds of polymetallic deposits such as copper,molybdenum,lead,zinc,gold and silver deposits have been discovered.The zircon U-Pb dating of the Dewulu and Meiwu rock bodies in the central part of the West Qinling yields ages of 241.6 Ma±5.3 Ma and 237.0 Ma±3.3 Ma,respectively,which belong to the early Mesozoic.The geochemical results indicate that the rocks have the characteristics of peraluminous calc-alkaline S-type granite,and display enrichment in light rare earth element,depletion in heavy rare earth element,and obvious negative Eu anomalies.According to the regional tectonic setting,it can be considered that the Dewulu-Meiwu area experienced a transition from extrusion to extension,accompanied by strong magmatic activity in the early Mesozoic,which provided a large amount of granitic magma and ore-forming materials for the West Qinling.
Keywords:
zircon U-Pb dating;geochemistry;tectonic setting;diagenetic and metallogenic relationship;Dewulu-Meiwu area
