| 华北克拉通北缘岩浆Ni-Cu-(PGE)硫化物矿床地质特征、形成时代及其地球动力学背景 |
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| 关键词:Cu-Ni-(PGE)sulfide deposit ore-forming epoch geodynamics north margin of NCC |
| 基金项目:中国地质大调查项目(编号:1212010633911); 国家自然科学基金项目(编号:40402012) |
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| Geological Characteristics, Geochronology and Tectonic Settings of Typical Magmatic Ni-Cu-(PGE) Sulfide Deposits in the Northern Margin of the North China Craton |
| The northern margin of the North China craton(NCC)Ni-Cu-(PGE)metallogenic belt is one of the regions in China characterized by the distribution of some important large-size or medium-size Ni-Cu-(PGE)sulfide deposits.The metallogenic belt has the following characteristics:① special geotectonic location caused a variety of metallogenic tectonic settings;② long-term and multi-period tectonic-magmatic activities resulted in multi-period lithogenesis and metallogenesis;③ regional metallogeny had multi-periods,with Mesozoic metallogeny being dominant;④ the distribution of deposits in this region occurred as belts in east and west and concentrated in subsection mostly in the eastern part of Jilin province.Based on these results,this paper summarized the basic characteristics of Ni-Cu-(PGE)sulfide deposits in NCC and its spatial distribution regularities,divided the metallogenic belt into four sub-belts,i.e.,① Ji-Hei metallogenic sub-belt,② Liao-Ji metallogenic sub-belt,③Yan-Ji metallogenic sub-belt,and ④ Bayan Obo metallogenic sub-belt,and redetermined the metallogenic epoch of each sub-belt.Three major ore-forming periods of Ni-Cu-(PGE)sulfide deposits in the NCC area are 2242～1962 Ma(Paleoproterozoic Lüliangcan),289～265 Ma(Late Paleozoic Late-Hercynian),225～216 Ma(Early Mesozoic Indosinian),with the corresponding geodynamic settings being the marginal rift environment in the north margin of NCC,the Late-Paleozoic post orogenic environment in the north margin of NCC and the post-collision and extensional environment of Paleo-Asian orogenic belt,respectively. |
| LÜ Lin-su,MAO Jing-wen,LIU Jun,ZHANG Zuo-heng,XIE Gui-qing.2007.Geological Characteristics, Geochronology and Tectonic Settings of Typical Magmatic Ni-Cu-(PGE) Sulfide Deposits in the Northern Margin of the North China Craton[J].Acta Geoscientica Sinica,28(2):148-166. |
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