The Mantle Plume Structure and Mineralization Effect in Northeast China
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    Abstract:

    Northeast China locates in the superposition part of ancient Asia structural and Western Pacific tectonic domains. The mantle plume in the area presents eight geological features. ① Bounded by the Siberian plate to north and the North China plate Archean basement (fracture) to south, and classified by metamorphic core complex core from east to west, the mantle plume as the boundary between north and south, the metamorphic core complex distribution as the boundary of east and west, and the range adjacent to the Sea of Japan is the scale of sub-mantle plume. ② Komatiite and picrite outcrop in the Jiamusi-Mudanjiang sutures, which may be the center of mantle plume. ③ Water systems are distributed radially and the distribution of Moho surface is in agreement with uplift of the Songliao Basin mantle.④ The typical thermal dome state. ⑤ Granite-based igneous province. ⑥ Mesozoic mafic basalt basically falls into the mantle plume range of Nb/Ta-Nb diagram.⑦Features of collapsed rift. ⑧ Lithosphere mantle shows mushroom cloud-like upwelling, and seismic tomography data confirm its complementary relationship with the Pacific plate subduction. The spatial and temporal distribution of Mesozoic mantle plume ore-forming effect is characterized by contemporary, the same igneous rock controlling structure, ore-forming in mountain ridge and reservoir formation in basin. He and Ar isotopic compositions were used to probe the homology of metallic ore deposits and oil and gas fields. The mantle-branch structure is the manifestation in the surface. This study undoubtedly has theoretical significance for deep prospecting and marine oil and gas field exploration nowadays.

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ZHEN Yunqing, niu shuyin, DIAO Qian, YE Liangwen, WU Jing, SONG Tao, JIA Xueyi.2012. The Mantle Plume Structure and Mineralization Effect in Northeast China[J]. Acta Geologica Sinica,86(12):1869-1889

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History
  • Received:March 02,2012
  • Revised:April 26,2012
  • Adopted:December 13,2012
  • Online: December 18,2012
  • Published: