Crust1. 0地壳模型及其应用:以长江中下游成矿带为例
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本文为地质调查项目(DD20190012,DD20160082),东华理工大学研究生创新基金(YC2019- B108),自然基金项目(41630320,41574133)及国家重点研发计划(2016YFC0600201)联合资助的成果。


Crust 1. 0 crustal model and its application: an example fromMiddle- Lower Yangtze Metallogenic Belt
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  • LUO Fan

    LUO Fan

    1) School of Geophysics and Measurementcontrol Technology, East China University of Technology, Nanchang, 330013;2) Chinese Academy of Geological Sciences, Beijing, 100037;3) China Deep Exploration Center, China Geological Survey & Chinese Academy of Geological Sciences, Beijing, 100037
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  • YAN Jiayong

    YAN Jiayong

    2) Chinese Academy of Geological Sciences, Beijing, 100037;3) China Deep Exploration Center, China Geological Survey & Chinese Academy of Geological Sciences, Beijing, 100037
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  • FU Guangming

    FU Guangming

    1) School of Geophysics and Measurementcontrol Technology, East China University of Technology, Nanchang, 330013;2) Chinese Academy of Geological Sciences, Beijing, 100037;3) China Deep Exploration Center, China Geological Survey & Chinese Academy of Geological Sciences, Beijing, 100037
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  • LUO Lei

    LUO Lei

    1) School of Geophysics and Measurementcontrol Technology, East China University of Technology, Nanchang, 330013;2) Chinese Academy of Geological Sciences, Beijing, 100037;3) China Deep Exploration Center, China Geological Survey & Chinese Academy of Geological Sciences, Beijing, 100037
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  • TAO Xin

    TAO Xin

    1) School of Geophysics and Measurementcontrol Technology, East China University of Technology, Nanchang, 330013;2) Chinese Academy of Geological Sciences, Beijing, 100037;3) China Deep Exploration Center, China Geological Survey & Chinese Academy of Geological Sciences, Beijing, 100037
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  • WANG hao

    WANG hao

    1) School of Geophysics and Measurementcontrol Technology, East China University of Technology, Nanchang, 330013;2) Chinese Academy of Geological Sciences, Beijing, 100037;3) China Deep Exploration Center, China Geological Survey & Chinese Academy of Geological Sciences, Beijing, 100037
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    摘要:

    地壳是地球系统的重要组成部分,了解各圈层的结构及相互作用是研究地球物质深部交互过程的核心问题,如何探测地壳内部的物质组成和形态结构一直是地球系统科学的研究热点。随着海量地球探测数据的积累和挖掘,地球科学学家提出了不同细节层次的地壳模型,当前最为详细,分辨率最高的全球地壳模型是Crust1. 0地壳模型。本文首先详细介绍了Crust1. 0地壳模型沉积层厚度和壳幔密度差的数据来源和分布特征。然后,基于Crust1. 0地壳模型信息,对长江中下游成矿带及邻区的卫星重力数据进行沉积层校正后,采用变密度界面计算方法,获得的长江中下游地区的Moho界面深度分布。长江中下游成矿带的Moho面形态呈现为“V”字型幔隆带,通过分析矿床、岩体及深大断裂的分布规律与幔隆带形成的关系,进一步证实了长江中下游成矿带深部的地幔隆起是形成巨型矿床的根本原因。研究结果表明,Crust1. 0在研究区域地壳结构、成矿动力学深部背景等基础地学和地球系统科学研究中具有广泛的应用前景。

    Abstract:

    The crust is an important part of the Earth system. Understanding the structure and interaction of each circle is the core issue in the study of the deep interaction process of the Earth’s material. Detection of the material composition and morphological structure of the Earth’s crust remains a hot research topic in the Earth sciences. With the accumulation and mining of massive Earth exploration datasets, earth scientists have proposed crustal models with different levels of detail. At present, the Crust 1.0 model is the most detailed and highest resolution global crust model. This paper first elaborates on the data sources, distribution characteristics, deposition layer thicknesses, and crust density differences of the Crust 1. 0 crust model. Then, based on the Crust 1. 0 model information, the sedimentary layer correction of the satellite gravity data in the Lower Yangtze Metallogenic Belt and its adjacent areas is incorporated, and the Moho interface depth distribution in the Lower Yangtze Metallogenic Belt is obtained by the variable density interface calculation method. Its Moho surface presents a “V”- shaped Mantle uplift. We analyze the relationship between the distribution of mineral deposits, rock masses and deep faults, and the formation of the Qianlong belt. Our results confirm that mantle uplift in the deep metallogenic belt of the middle and lower reaches of the Yangtze River is the primary factor controlling the formation of deposits. The results show that Crust 1. 0 model has broad application potential in the study of regional crustal structure, deep background of metallogenic dynamics, and earth system research.

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罗凡,严加永,付光明,罗磊,陶鑫,王昊.2020. Crust1. 0地壳模型及其应用:以长江中下游成矿带为例[J].地质学报,94(2):648-660.
LUO Fan, YAN Jiayong, FU Guangming, LUO Lei, TAO Xin, WANG hao.2020. Crust 1. 0 crustal model and its application: an example fromMiddle- Lower Yangtze Metallogenic Belt[J]. Acta Geologica Sinica,94(2):648-660.

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历史
  • 收稿日期:2018-12-10
  • 最后修改日期:2019-01-15
  • 录用日期:2019-04-10
  • 在线发布日期: 2019-04-10