| 温常贵,真允庆,花林宝,刁谦,陈中,宋涛,袁杰,乔红.从中国东部地貌演变,看中新生代成矿成藏作用[J].地质找矿论丛,2017,32(1):60-74 |
| 从中国东部地貌演变,看中新生代成矿成藏作用 |
| A View of Mesozoic-Cenozoic metallogenic and reservoir formation processes Based on Landform Evolution in Eastern China |
| 投稿时间：2016-06-22 修订日期：2016-12-11 |
| DOI：10.6053/j.issn.1001-1412.2017.01.008 |
| 中文关键词: 地貌演变 埃达克岩 高原成熟-垮塌期 板块俯冲与地幔柱上涌 中国东部 |
| 英文关键词:landform evolution adakite maturity-collapse period of plateau plate subduction and mantle plume upwelling Eastern China |
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| 摘要点击次数: 1521 |
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| 中文摘要: |
| 中国地势可分为4个阶梯（青藏高原、中部高地、东部平原和海域大陆架），地势分布的特点与热岩石圈厚度的变化基本一致，其成因与印度板块和太平洋板块对欧亚板块的俯冲有关。东部地貌的变化，常依据中酸性岩浆岩分布、区域构造演化、地层沉积和剥蚀、黏土矿物组成、古环境和古气候变化及海水Sr同位素资料来推测。根据埋深不同的4种埃达克岩的时空分布，推断在晚侏罗世-早白垩世，中国东部地区经历了高原萌生期、高原成熟期、高原垮塌期和高原残留期的演化过程。尤其是华北高原成熟-垮塌期与区内断陷盆地的形成及大规模成矿作用密切相关，以渤海湾盆地和胶东金矿集中区为例进行了剖析，并通过地震层析成像资料予以证实；华北克拉通岩石圈的减薄及破坏，由岩石圈拆沉和热侵蚀作用所致，与高原成熟-垮塌期的岩浆活动和成矿期相吻合，埃达克岩的形成也是太平洋板块与地幔上隆热幔柱相互作用的结果。这种认识为深部找矿找藏工作提供了成矿学的理论基础。 |
| 英文摘要: |
| In general the terrain in China is high in the west and low in the east, roughly divided into four gradients, from west to east, Tibetan Plateau, Central China and Eastern plain and the continental shelf. The division is coincided with the thickness variation of the lithosphere. The terrain pattern might be caused by the subduction of Indian Plate and Pacific Plate under Eurasian Plate. The intermediate-acidic magma distribution, regional structural evolution, sedimentation and erosion of strata, clay mineral assemblage, change of paleoenvironment and paleoclimate, and seawater Sr isotopic data were generally used to trace and speculate the landform variation in Eastern China. It is postulated from four types of adakite buried at different depth that the eastern china was exposed to initiation and maturity of plateau then plateau collapse and relic plateau during Late Jurassic-early Cretaceous Epoch. Especially, the maturity-collapse period of the Huabei plateau is closely related to formation of fault basin and large scale metallogeny in the area, such as the Bohai Bay Basin and Jiaodong gold deposit-clustered area that can be proved by the seismic tomography data. In the Huabei craton thinning and break-up of the lithosphere were caused by the delamination and thermal erosion that is coincided with the magmatism and metallogeny in the area during the maturity-collapse period of plateau and the adakite was resulted from the interaction of Pacific Plate and the upwelling mantle plume. All these undoubtedly provide the metallogenic theory foundation for prospecting to depth. |
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