Carbonate platform evolution: from a bioconstructed platform margin to a sand-shoal system (Devonian, Guilin, South China)
文献类型：期刊论文
| 作者 | Chen, DZ; Tucker, ME; Zhu, JQ; Jiang, MS |
| 刊名 | SEDIMENTOLOGY
 |
| 出版日期 | 2002-08-01 |
| 卷号 | 49期号:4页码:737-764 |
| 关键词 | carbonate platform microbially rimmed platform margin sand-shoal system South China |
| ISSN号 | 0037-0746 |
| 文献子类 | Article |
| 英文摘要 | The depositional organization and architecture of the middle-late Devonian Yangdi rimmed carbonate platform margin in the Guilin area of South China were related to oblique, extensional faulting in a strike-slip setting. The platform margin shows two main stages of construction in the late Givetian to Frasnian, with a bioconstructed margin evolving into a sand-shoal system. In the late Givetian, the platform margin was rimmed with microbial buildups composed mainly of cyanobacterial colonies (mostly Renalcis and Epiphyton ). These grew upwards and produced an aggradational (locally slightly retrogradational) architecture with steep foreslope clinoforms. Three depositional sequences (S3-S5) are recognized in the upper Givetian strata, which are dominated by extensive microbialites. Metre-scale depositional cyclicity occurs in most facies associations, except in the platform-margin buildups and upper foreslope facies. In the latest Givetian (at the top of sequence S5), relative platform uplift (+/- subaerial exposure) and associated rapid basin subsidence (probably a block-tilting effect) caused large-scale platform collapse and slope erosion to give local scalloped embayments along the platform margin and the synchronous demise of microbial buildups. Subsequently, sand shoals and banks composed of ooids and peloids and, a little later, stromatoporoid buildups on the palaeohighs, developed along the platform margin, from which abundant loose sediment was transported downslope to form gravity-flow deposits. Another strong tectonic episode caused further platform collapse in the early Frasnian (at the top of sequence S6), leading to large-scale breccia release and the death of the stromatoporoid buildups. Siliceous facies (banded cherts and siliceous shales) were then deposited extensively in the basin centre as a result of the influx of hydrothermal fluids. The platform-margin sand-shoal/bank system, possibly with gullies on the slope, persisted into the latest Frasnian until the restoration of microbial buildups. Four sequences (S6-S9), characterized by abundant sand-shoal deposits on the margin and gravity-flow and hemipelagic deposits on the slope, are distinguished in the Frasnian strata. Smaller-scale depositional cyclicity is evident in all facies associations across the platform-slope-basin transect. The distinctive depositional architecture and evolution of this Yangdi Platform are interpreted as having been controlled mainly by regional tectonics with contributions from eustasy, environmental factors, oceanographic setting, biotic and sedimentary fabrics. |
| WOS关键词 | EASTERN GREAT-BASIN ; ACTIVE FAULT BLOCKS ; NORTHERN SPAIN ; SEQUENCE STRATIGRAPHY ; DEPOSITIONAL SEQUENCES ; GEOLOGICAL RECORD ; MIDDLE ; CYCLOSTRATIGRAPHY ; SEDIMENTATION ; ARCHITECTURE |
| WOS研究方向 | Geology |
| 语种 | 英语 |
| WOS记录号 | WOS:000177524900005 |
| 出版者 | BLACKWELL PUBLISHING LTD |
| 源URL | [http://ir.iggcas.ac.cn/handle/132A11/78007]  |
| 专题 | 中国科学院地质与地球物理研究所 |
| 通讯作者 | Chen, DZ |
| 作者单位 | 1.Chinese Acad Sci, Inst Geol & Geophys, Beijing 100029, Peoples R China 2.Univ Durham, Dept Geol Sci, Durham DH1 3LE, England |
| 推荐引用方式 GB/T 7714 | Chen, DZ,Tucker, ME,Zhu, JQ,et al. Carbonate platform evolution: from a bioconstructed platform margin to a sand-shoal system (Devonian, Guilin, South China)[J]. SEDIMENTOLOGY,2002,49(4):737-764. |
| APA | Chen, DZ,Tucker, ME,Zhu, JQ,&Jiang, MS.(2002).Carbonate platform evolution: from a bioconstructed platform margin to a sand-shoal system (Devonian, Guilin, South China).SEDIMENTOLOGY,49(4),737-764. |
| MLA | Chen, DZ,et al."Carbonate platform evolution: from a bioconstructed platform margin to a sand-shoal system (Devonian, Guilin, South China)".SEDIMENTOLOGY 49.4(2002):737-764. |
入库方式： OAI收割
来源：地质与地球物理研究所
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