| 中国东部燕山期大火成岩省:岩浆-构造-资源-环境效应 |
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| 关键词:Large Igneous Province(LIP) strategic minerals magamatic-tectonic-resources-environmental effects Yanshanian eastern China |
| 基金项目:中国地质科学院基本科研业务费项目(编号: JYYWF20180101);中国地质调查局地质调查项目(编号: DD20190589; DD20160220; DD20190703);自然科学基金项目(编号: 41072073) |
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| Yanshanian Large Igneous Provinces in Eastern China:Magmatism-Tectonics-Resources-Environment Effects |
| The yanshanian large-scale magmatic activity in eastern China, namely, the Jurassic–Cretaceous (150–100 Ma) alkaline rhyolites, alkaline basalts, kimberlites, lamproites, carbonatites, and their plumbing systems, distributed in the inner part of the Jiangnan Orogenic Belt and the North China Platform to the west of the southern segment of the Tan-Lu Fault Zone, has a cumulative area of more than 300 000 km2. The large-scale magmatic event during this period represents a Large Igneous Province (LIP) event in the geological history of eastern China, which essentially controls the tectonic changes, resources, energy formation, and geological environmental changes in the North China-Yangtze Platforms since the Yanshanian. The Late Jurassic–Early Cretaceous (150–100 Ma) LIP was part of the mid-Mesozoic Paleo–Pacific Large Igneous Province along the eastern margin of the China Craton. It resulted from the upwelling of the super mantle plume, convecting of the lithospheric slabs, and squeezing of the mantle material for rapid uplifting wthin a huge area covering the Ongtong– Java (Mahoney et al., 1993; Ingle and Coffin, 2004) –eastern China, forming the following: (1) Tiaojishan– Zhangjiakou formation, alkaline rhyolitic basaltic bimodal volcanic rocks, and their plumbing systems are closely related to large-scale gold-polymetallic mineralization in North China; (2) Kimberlites–lamproites ± carbonatites ± mafic-ultrabasic complexes and their plumbing systems distrubuted in the belts as Wafangdian, Liaoning; Mengyin, Shandong; Langan, Anhui; Ningxiang, Hunan; and Zhenyuan, Guizhou; closely related to the mineralization of diamond, gold–platinum group elements, and other elements; and (3) The Contiguous granites, distributed in the regions as liaodong Peninsula, Nanling and Dian-Guizhou–Guangxi border area, are the plumbing systems of sillic large igneous provinces, and are closely related to the mineralization of diamond, gold-platinum group element, tungsten, tin, niobium and tantalite, lithium, potassium, rubidium, cesium and uranium, oil-gas, and other strategic key metals. At the same time, the beneficial and/or harmful environmental effects of the formation of high-quality soil layers from the bedrock rich in trace elements, such as potassium and phosphorus, and rare earth caused by giant magmatism are directly related to ecological environment of Earth. Therefore, the Yanshanian LIP in eastern China has produced profound magmatic-tectonic-resources-environmental effects. |
| ZENG Pu-sheng,LI Rui-zhe,LIU Si-wen,WEN Li-gang,ZHAO Jiu-jiang,WANG Shi-an.2021.Yanshanian Large Igneous Provinces in Eastern China:Magmatism-Tectonics-Resources-Environment Effects[J].Acta Geoscientica Sinica,42(6):721-748. |
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