The early Cretaceous orogen-scale Dabieshan metamorphic core complex: implications for extensional collapse of the Triassic HP-UHP orogenic belt in east-central China
文献类型：期刊论文
| 作者 | Ji, Wenbin1,2; Lin, Wei1; Faure, Michel2; Shi, Yonghong3; Wang, Qingchen1 |
| 刊名 | INTERNATIONAL JOURNAL OF EARTH SCIENCES
 |
| 出版日期 | 2017-06-01 |
| 卷号 | 106期号:4页码:1311-1340 |
| 关键词 | Dabieshan Hp-uhp Orogenic Belt Extensional Collapse Metamorphic Core Complex Crustal Anatexis Multiple Detachments |
| ISSN号 | 1437-3254 |
| DOI | 10.1007/s00531-016-1311-6 |
| 文献子类 | Article |
| 英文摘要 | The Dabieshan massif is famous as a portion of the world's largest HP-UHP metamorphic belt in east-central China that was built by the Triassic North-South China collision. The central domain of the Dabieshan massif is occupied by a huge migmatite-cored dome [i.e., the central Dabieshan dome (CDD)]. Origin of this domal structure remains controversial. Synthesizing previous and our new structural and geochronological data, we define the Cretaceous Dabieshan as an orogen-scale metamorphic core complex (MCC) with a multistage history. Onset of lithospheric extension in the Dabieshan area occurred as early as the commencement of crustal anatexis at the earliest Cretaceous (ca. 145 Ma), which was followed by primary (early-stage) detachment during 142-130 Ma. The central Dabieshan complex in the footwall and surrounding detachment faults recorded a consistently top-to-the-NW shearing. It is thus inferred that the primary detachment was initiated from a flat-lying detachment zone at the middle crust level. Removal of the orogenic root by delamination at ca. 130 Ma came into the extensional climax, and subsequently isostatic rebound resulted in rapid doming. Along with exhumation of the footwall, the mid-crustal detachment zone had been warped as shear zones around the CDD. After 120 Ma, the detachment system probably experienced a migration accommodated to the crustal adjustment, which led to secondary (late-stage) detachment with localized ductile shearing at ca. 110 Ma. The migmatite-gneiss with HP/UHP relicts in the CDD (i.e., the central Dabieshan complex) was product of the Cretaceous crustal anatexis that consumed the deep-seated part of the HP-UHP slices and the underlying para-autochthonous basement. Compared with the contemporaneous MCCs widely developed along the eastern margin of the Eurasian continent, we proposed that occurrence of the Dabieshan MCC shares the same tectonic setting as the "destruction of the North China craton". However, geodynamic trigger of the Cretaceous continental-scale NW-SE extension in eastern Asia is still a mystery. |
| WOS关键词 | ZIRCON U-PB ; ULTRAHIGH-PRESSURE METAMORPHISM ; SUBDUCTED CONTINENTAL-CRUST ; COESITE-BEARING ECLOGITES ; TAN-LU FAULT ; MAFIC-ULTRAMAFIC ROCKS ; O-ISOTOPE EVIDENCE ; NORTH CHINA ; TECTONIC EVOLUTION ; MANTLE INTERACTION |
| WOS研究方向 | Geology |
| 语种 | 英语 |
| WOS记录号 | WOS:000401629200009 |
| 出版者 | SPRINGER |
| 资助机构 | National Natural Science Foundation of China(41225009 ; National Natural Science Foundation of China(41225009 ; 41472193 ; 41472193 ; 41502202) ; 41502202) ; National Natural Science Foundation of China(41225009 ; National Natural Science Foundation of China(41225009 ; 41472193 ; 41472193 ; 41502202) ; 41502202) ; National Natural Science Foundation of China(41225009 ; National Natural Science Foundation of China(41225009 ; 41472193 ; 41472193 ; 41502202) ; 41502202) ; National Natural Science Foundation of China(41225009 ; National Natural Science Foundation of China(41225009 ; 41472193 ; 41472193 ; 41502202) ; 41502202) |
| 源URL | [http://ir.iggcas.ac.cn/handle/132A11/52929]  |
| 专题 | 地质与地球物理研究所_岩石圈演化国家重点实验室 |
| 通讯作者 | Lin, Wei |
| 作者单位 | 1.Chinese Acad Sci, Inst Geol & Geophys, State Key Lab Lithospher Evolut, Beijing 100029, Peoples R China 2.Univ Orleans, Inst Sci Terre Orleans, F-45071 Orleans, France 3.Hefei Univ Technol, Sch Resource & Environm Engn, Hefei 230009, Peoples R China |
| 推荐引用方式 GB/T 7714 | Ji, Wenbin,Lin, Wei,Faure, Michel,et al. The early Cretaceous orogen-scale Dabieshan metamorphic core complex: implications for extensional collapse of the Triassic HP-UHP orogenic belt in east-central China[J]. INTERNATIONAL JOURNAL OF EARTH SCIENCES,2017,106(4):1311-1340. |
| APA | Ji, Wenbin,Lin, Wei,Faure, Michel,Shi, Yonghong,&Wang, Qingchen.(2017).The early Cretaceous orogen-scale Dabieshan metamorphic core complex: implications for extensional collapse of the Triassic HP-UHP orogenic belt in east-central China.INTERNATIONAL JOURNAL OF EARTH SCIENCES,106(4),1311-1340. |
| MLA | Ji, Wenbin,et al."The early Cretaceous orogen-scale Dabieshan metamorphic core complex: implications for extensional collapse of the Triassic HP-UHP orogenic belt in east-central China".INTERNATIONAL JOURNAL OF EARTH SCIENCES 106.4(2017):1311-1340. |
入库方式： OAI收割
来源：地质与地球物理研究所
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