【摘要】 东北地区处于古亚洲构造域和西太平洋构造域的叠合部位。该区地幔热柱存在8个地质标志:①南北以西伯利亚板块和华北板块太古代基底(断裂)为界,东西以变质核杂岩体分布为界,基本与日本海毗邻的范围为亚地幔柱的规模;②在佳木斯-牡丹江缝合线内见有科马提岩、苦橄岩,可能为地幔热柱的中心;③水系分布呈放射状及莫霍面分布为松辽盆地幔隆起一致;④典型的热穹隆状态;⑤以花岗岩为主的火成岩省;⑥中生代基性玄武岩基本落入Nb/Ta-Nb图解的地幔柱范围;⑦形成坍塌裂谷特征;⑧岩石圈地幔呈蘑菇云状上涌,地震层析资料证实与太平洋板块俯冲具有相辅相成关系。中生代地幔热柱成矿成藏作用的时空分布具有同时代、同火成岩构造控制,山岭成矿,盆地成藏特征。从He及Ar同位素组成阐明金属矿床与油气田的同源性,分析了幔枝构造是在地表的表现形式,无疑对当今深部找矿及海相油气田的勘查具有理论指导意义。更多还原

【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.更多还原