Knowledge Resource Center for Ecological Environment in Arid Area
DOI | 10.1016/j.palaeo.2015.10.041 |
Implications of loess and fluvial deposits on paleoclimatic conditions during an icehouse-hothouse transition, Capitanian upper Quanzijie low-order cycle, Bogda Mountains, NW China | |
Obrist-Farner, Jonathan1; Yang, Wan1,2 | |
通讯作者 | Yang, Wan |
来源期刊 | PALAEOGEOGRAPHY PALAEOCLIMATOLOGY PALAEOECOLOGY |
ISSN | 0031-0182 |
EISSN | 1872-616X |
出版年 | 2016 |
卷号 | 441页码:959-981 |
英文摘要 | Permian terrestrial sedimentary records provide important clues on paleoclimatic conditions and changes in a vegetated planet during the last icehouse-hothouse transition. Seven stratigraphic sections of Middle Permian upper Quanzijie low-order cycle (QZJ LC) in Bogda Mountains, NW China, are studied to interpret the depositional environments and paleoclimatic conditions within a multi-order stratigraphic framework. The upper QZJ LC contains distinct laterally persistent, thick, and massive red mudrocks interbedded with laterally discontinuous conglomerates. The mudrocks are interpreted as loess deposits on the basis of their massive structure, uniform multi-modal grain size distribution, lateral extent, mineral composition, and uniform detrital zircon ages. Thin conglomerates with a low-relief erosional base are interpreted as ephemeral braided stream deposits, whereas thick conglomerates with a high-relief base that display a clear fining-upward trend as meandering stream deposits. In Tarlong-Taodonggou area in the south, common Protosols in loess deposits indicate dust accumulation under arid to semiarid conditions. In Dalongkou 70 km to the north, argillic Protosols indicate subhumid conditions alternating with arid-semiarid episodes. Gleysols in the upper part in both areas indicate a change to subhumid-humid conditions at the end of QZJ time. The results strongly suggest that persistent aridity, eolian processes, and dust trapping mechanisms had existed in NE Pangea during Capitanian time. The gradual but dramatic climatic change from arid-semiarid to subhumid-humid conditions at the end of Capitanian correlates to and is the result of the global demise of the late Paleozoic Ice Age. (C) 2015 Elsevier B.V. All rights reserved. |
英文关键词 | Loess Icehouse-hothouse Permian China Pangea |
类型 | Article |
语种 | 英语 |
国家 | USA ; Peoples R China |
收录类别 | SCI-E |
WOS记录号 | WOS:000367113900028 |
WOS关键词 | PALEOZOIC ICE-AGE ; UPPER PLEISTOCENE LOESS ; ASIAN OROGENIC BELT ; TURPAN-HAMI BASIN ; DUST DEPOSITION ; GRAIN-SIZE ; TECTONIC EVOLUTION ; SEDIMENTARY RECORD ; NORTHWEST CHINA ; CLIMATE-CHANGE |
WOS类目 | Geography, Physical ; Geosciences, Multidisciplinary ; Paleontology |
WOS研究方向 | Physical Geography ; Geology ; Paleontology |
来源机构 | 中国科学院地质与地球物理研究所 |
资源类型 | 期刊论文 |
条目标识符 | http://119.78.100.177/qdio/handle/2XILL650/195315 |
作者单位 | 1.Missouri Univ Sci & Technol, Geol & Geophys Program, Rolla, MO 65409 USA; 2.Chinese Acad Sci, Inst Geol & Geophys, Beijing 100029, Peoples R China |
推荐引用方式 GB/T 7714 | Obrist-Farner, Jonathan,Yang, Wan. Implications of loess and fluvial deposits on paleoclimatic conditions during an icehouse-hothouse transition, Capitanian upper Quanzijie low-order cycle, Bogda Mountains, NW China[J]. 中国科学院地质与地球物理研究所,2016,441:959-981. |
APA | Obrist-Farner, Jonathan,&Yang, Wan.(2016).Implications of loess and fluvial deposits on paleoclimatic conditions during an icehouse-hothouse transition, Capitanian upper Quanzijie low-order cycle, Bogda Mountains, NW China.PALAEOGEOGRAPHY PALAEOCLIMATOLOGY PALAEOECOLOGY,441,959-981. |
MLA | Obrist-Farner, Jonathan,et al."Implications of loess and fluvial deposits on paleoclimatic conditions during an icehouse-hothouse transition, Capitanian upper Quanzijie low-order cycle, Bogda Mountains, NW China".PALAEOGEOGRAPHY PALAEOCLIMATOLOGY PALAEOECOLOGY 441(2016):959-981. |
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