Polyorogenic evolution of the paleoproterozoic Trans-North China Belt - New insights from the Luliangshan-Hengshan-Wutaishan and Fuping massifs
文献类型：期刊论文
| 作者 | Faure, Michel; Trap, Pierre; Lin, Wei; Monie, Patrick; Bruguier, Olivier |
| 刊名 | EPISODES
 |
| 出版日期 | 2007-06-01 |
| 卷号 | 30期号:2页码:96-107 |
| ISSN号 | 0705-3797 |
| 文献子类 | Article |
| 英文摘要 | The Trans-North China Belt (TNCB) is a Paleoproterozoic collisional orogen (ca. 1.9-1.8 Ga) responsible for the amalgamation of the North China Craton. Detailed field works in Luliangshan, Hengshan, Wutaishan and Fuping massifs where the belt is well exposed, allow us to draw a new tectonic map and crustal-scale cross sections. The available petrologic, radiometric, geochronologic data are integrated in a geodynamic evolution scheme for this orogen. The Low Grade Mafic Unit (LGMU) is interpreted as an ophiolitic nappe rooted in a suture zone located in the western part of the Luliangshan. This ophiolitic nappe overthrusts to the SE upon the Orthogneiss-Volcanites Unit (OVU) that consists of a bimodal volcanic-sedimentary series metamorphosed under amphibolite facies conditions intruded by calcalkaline orthogneiss. The OVU is a composite Neoarchean-Paleoproterozoic magmatic arc developed A ring two stages (ca. 2500 and 2 100 Ma) upon a con tinental basement corresponding to the western extension of the Neoarchean Fuping massif. The OVU overthrusts to the SE the Fuping massif along the Longquanguan shear zone. This stack of nappes, coeval with an amphibolite facies metamorphism, is dated at ca. 1880 Ma. Subsequently, the metamorphic series experienced a widespread migmatization at 1850 Ma and was intruded by post-orogenic plutons dated at 1800 Ma. The weakly to unmetamorphosed Hutuo Supergroup unconformably overlies the metamorphosed and ductilely deformed units (OVU and LGMU), but it is also involved in a second tectonic phase developed in subsurface conditions. These structural features lead us to question the ca. 2090 Ma age attributed to the Hutuo supergroup. Moreover, in the Fuping massif, several structural and magmatic lines of evidence argue for an earlier orogenic event at ca. 2100 Ma that we relate to an older west-directed subduction below the Fuping Block. The Taihangshan Fault might be the location of a possible suture zone between the Fuping Block and an eastern one. A geodynamic model, at variance with previous ones, is proposed to account for the formation of the TNCB. In this scheme, three Archean continents, namely from west to east, the Ordos, Fuping and Eastern Blocks are separated by the Luliang and Taihang Oceans. The closure of the Taihang Ocean at ca. 2 100 Ma by westward subduction below the Fuping Block accounts for the arc magmatism and the 2100 Ma orogeny. The second collision at 1900-1880 Ma between the Fuping and Ordos blocks is responsible for the main structural, metamorphic and magmatic features of the Trans-North China Belt. |
| WOS关键词 | U-TH-PB ; NM ND-YAG ; TECTONIC EVOLUTION ; ELECTRON-MICROPROBE ; MONAZITE GEOCHRONOLOGY ; METAMORPHIC EVOLUTION ; ZIRCON GEOCHRONOLOGY ; OPHIOLITIC ROCKS ; GREENSTONE-BELT ; HUDSON OROGEN |
| WOS研究方向 | Geology |
| 语种 | 英语 |
| WOS记录号 | WOS:000249085200004 |
| 出版者 | INT UNION GEOLOGICAL SCIENCES |
| 源URL | [http://ir.iggcas.ac.cn/handle/132A11/68174]  |
| 专题 | 中国科学院地质与地球物理研究所 |
| 通讯作者 | Faure, Michel |
| 作者单位 | 1.Univ Orleans, UMR CNRS 6113, Inst Sci Terre Orleans, F-45067 Orleans 2, France 2.Chinese Acad Sci, Inst Geol & Geophys, State Key Lab Lithospher Evolut, Beijing 10029, Peoples R China 3.Univ Montpellier 2, F-34095 Montpellier, France |
| 推荐引用方式 GB/T 7714 | Faure, Michel,Trap, Pierre,Lin, Wei,et al. Polyorogenic evolution of the paleoproterozoic Trans-North China Belt - New insights from the Luliangshan-Hengshan-Wutaishan and Fuping massifs[J]. EPISODES,2007,30(2):96-107. |
| APA | Faure, Michel,Trap, Pierre,Lin, Wei,Monie, Patrick,&Bruguier, Olivier.(2007).Polyorogenic evolution of the paleoproterozoic Trans-North China Belt - New insights from the Luliangshan-Hengshan-Wutaishan and Fuping massifs.EPISODES,30(2),96-107. |
| MLA | Faure, Michel,et al."Polyorogenic evolution of the paleoproterozoic Trans-North China Belt - New insights from the Luliangshan-Hengshan-Wutaishan and Fuping massifs".EPISODES 30.2(2007):96-107. |
入库方式： OAI收割
来源：地质与地球物理研究所
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