韦振权, 杨永, 何高文, 杨胜雄, 姚翔. 中国富钴结壳合同区维嘉海山漂移历史和沉降过程[J]. 地质通报, 2021, 40(2-3): 260-266.
    引用本文: 韦振权, 杨永, 何高文, 杨胜雄, 姚翔. 中国富钴结壳合同区维嘉海山漂移历史和沉降过程[J]. 地质通报, 2021, 40(2-3): 260-266.
    WEI Zhenquan, YANG Yong, HE Gaowen, YANG Shengxiong, YAO Xiang. Drift history and subsidence process of Weijia Guyot, China contract area of Co-rich crust[J]. Geological Bulletin of China, 2021, 40(2-3): 260-266.
    Citation: WEI Zhenquan, YANG Yong, HE Gaowen, YANG Shengxiong, YAO Xiang. Drift history and subsidence process of Weijia Guyot, China contract area of Co-rich crust[J]. Geological Bulletin of China, 2021, 40(2-3): 260-266.

    中国富钴结壳合同区维嘉海山漂移历史和沉降过程

    Drift history and subsidence process of Weijia Guyot, China contract area of Co-rich crust

    • 摘要: 应用全球板块构造-水深模型,对西太平洋中国富钴结壳合同区海山——维嘉海山的水平漂移轨迹和垂向沉降过程进行反演,获取海山各个历史时期的水深和古纬度信息,探讨海山演化过程中热点作用的影响。结果表明,维嘉海山最初形成于南太平洋同位素和热异常区,之后向NW向漂移约7500 km至现今位置。维嘉海山初始位置与其附近热点尚有一定的距离(约为200 km),随板块漂移过程中也未经过热点,与热点最近距离为150 km,结合海山现今的构造特征分析,推测热点作用并非形成海山的唯一成因,但在海山形成及漂移过程中为其打上"热点"烙印。

       

      Abstract: Based on the global plate tectonic-bathymetric model, the horizontal drift track and vertical subsidence process of the Weijia Guyot, also known as the cobalt-rich nodule contract area of China in the Western Pacific Ocean, are inversed to obtain the palaeobathymetry and palaeolatitude of seamounts in different historical periods and to discuss the influence of hot spots in the evolution process of the seamount.The results show that the Weijia Guyot was formed initially in the isotopic anomaly and thermal anomaly area of South Pacific, and then drifted northeastward about 7500 km to the present position.There is a certain distance (about 200 km) between the initial location of the Weijia Guyot and its adjacent hot spots.The Weijia Guyot did not pass through these hot spots in the process of drift, and its closest distance to them is 150 km.Combined with the analysis of the present structure of the Weijia Guyot, it is speculated that these hot spots are not the only cause of the Weijia Guyot formation, but the Weijia Guyot was branded as "hot spots" in its formation and drift process.

       

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