Jurassic depositional records and sandstone provenances in Hefei Basin, central China: Implication for Dabie orogenesis
文献类型：期刊论文
| 作者 | Li, Z; Li, RW; Sun, S; Wang, QC |
| 刊名 | ISLAND ARC
 |
| 出版日期 | 2004-06-01 |
| 卷号 | 13期号:2页码:346-358 |
| 关键词 | basin-fill sequence Dabie Mountains Hefei Basin Mesozoic sandstone provenance |
| ISSN号 | 1038-4871 |
| 文献子类 | Article |
| 英文摘要 | Detrital composition and major element geochemistry of Jurassic sandstones in the south Hefei Basin, central China, show their provenance to be the Dabie Mountains, whose tectonic attributes are closely related to continent-island arc complexes. It was found that a provenance change, from recycled orogen signatures and mixed orogenic sandstones to arc orogen, occurs from the lower Middle Jurassic to the Upper Jurassic (the Zhougongshan Formation). Dissected magmatic arc sources were gradually exposed in the Dabie Mountains due to intensive exhumation during the Late Jurassic, particularly after the Fenghuangtai depositional phase. Furthermore, it can be infered that the magmatic arc was initially present in both the Early Paleozoic and the Triassic, according to isotopic dating studies in previously published reports. delta(13)C-delta(18)O tracing between existing marbles of different strata in the Dabie block and marble gravels of the Fenghuangtai Formation in the Hefei Basin indicate that partial lithostratigraphic units for the Jurassic provenances have entirely disappeared from the Dabie block; therefore, it is impossible to reconstruct integral orogenic processes from studies on the remaining Dabie block alone. These findings, together with basin-fill sequences, also suggest that the Hefei Basin was mainly subjected to compressive mechanical regimes rather than extensional regimes in the Jurassic, which resulted in reverse-grading clastic depositional sequences, and is probably related to the northward intracontinental deep subduction of the Yangtze Plate. Regional exhumation properties and a tectonic model of the Late Mesozoic Dabie orogenesis are discussed in this paper. |
| WOS关键词 | METAMORPHIC TERRAIN ; PLATE-TECTONICS ; MOUNTAINS ; COESITE ; SHAN ; BELT ; CONSTRAINTS ; EXHUMATION ; ECLOGITES ; GRAVELS |
| WOS研究方向 | Geology |
| 语种 | 英语 |
| WOS记录号 | WOS:000221081200002 |
| 出版者 | BLACKWELL PUBLISHING ASIA |
| 源URL | [http://ir.iggcas.ac.cn/handle/132A11/79595]  |
| 专题 | 中国科学院地质与地球物理研究所 |
| 通讯作者 | Li, Z |
| 作者单位 | Chinese Acad Sci, Inst Geol & Geophys, Beijing 100029, Peoples R China |
| 推荐引用方式 GB/T 7714 | Li, Z,Li, RW,Sun, S,et al. Jurassic depositional records and sandstone provenances in Hefei Basin, central China: Implication for Dabie orogenesis[J]. ISLAND ARC,2004,13(2):346-358. |
| APA | Li, Z,Li, RW,Sun, S,&Wang, QC.(2004).Jurassic depositional records and sandstone provenances in Hefei Basin, central China: Implication for Dabie orogenesis.ISLAND ARC,13(2),346-358. |
| MLA | Li, Z,et al."Jurassic depositional records and sandstone provenances in Hefei Basin, central China: Implication for Dabie orogenesis".ISLAND ARC 13.2(2004):346-358. |
入库方式： OAI收割
来源：地质与地球物理研究所
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