甘肃北山新场花岗岩的成因、构造意义及对高放废物地质处置的启示:来自地球化学、锆石U-Pb年代学及Lu-Hf同位素的约束
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1.南华大学资源环境与安全工程学院;2.稀有金属矿产开发与废物地质处置技术湖南省重点实验室;3.中核集团核工业北京地质研究院;4.中国地质科学院矿产资源研究所自然资源部成矿作用和资源评价重点实验室;5.湖南省地质灾害调查监测所

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国家自然科学基金(编号:41902098)、国家原子能机构高放废物地质创新中心基金(编号:CXJJ21102211)、湖南省自然科学基金(编号:2023JJ30505)、湖南省教育厅科研项目重点基金(23A0327)和南华大学科研项目(编号:CX20230966; 20224130214)


The genesis and tectonic significance of the Xinchang granites in Beishan, Gansu Province and its implications for the geological disposal of High-Level Radioactive Wastes (HLWs): Constraints from geochemistry, zircon U-Pb chronology and Lu-Hf isotopes
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1.School of Resource &2.Environment and Safety Engineering, University of South China;3.Hunnan Key Laboratory of the Rare Metal Minerals Exploitation and Geological Disposal of Wastes;4.CNNC Beijing Research Institute of Uranium Geology;5.MNR Key Laboratory of Metallogeny and Mineral Assessment, Institute of Mineral Resources, Chinese Academy of Geological Sciences;6.Institute of Geological Disaster Investigation and Monitoring of Hunan Province

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    摘要:

    新场位于甘肃北山南部东段,是研究北山南部构造演化和开展高放废物地质处置选址评价的关键地区。新场岩体由中细粒黑云母二长花岗岩、花岗闪长岩、片麻状英云闪长岩三个岩相单元组成。黑云母二长花岗岩与花岗闪长岩总体富硅、富钾(K2O>Na2O)、富碱、铝含量中等,属于弱过铝质的高钾钙碱性A2型花岗岩;英云闪长岩低硅、富钠(K2O

    Abstract:

    Xinchang, located in the eastern section of the southern part of Beishan, Gansu province, is a key area for studying the tectonic evolution of the southern part of Beishan and evaluating the site selection in the geological disposal of HLWs. The Xinchang granitoids are composed of three lithofacies units: medium-fine biotite monzonitic granite, granodiorite and gneissic tonalite. Biotite monzonitic granite and granodiorite are generally rich in silicon, potassium (K2O>Na2O), and alkali, and have medium aluminum. These two granites belong to weak peraluminous and high potassium calc alkaline A2 type granite. The tonalite is rich in sodium (K2O

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  • 收稿日期:2023-12-16
  • 最后修改日期:2024-02-28
  • 录用日期:2024-03-03
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