干旱区生态环境知识资源中心(Arid): EVIDENCE OF NEOTECTONIC IMPACT ON A LARGE SEDIMENTARY BASIN BETWEEN TIBETAN PLATEAU AND GOBI ALTAY,NW CHINA

Arid

	EVIDENCE OF NEOTECTONIC IMPACT ON A LARGE SEDIMENTARY BASIN BETWEEN TIBETAN PLATEAU AND GOBI ALTAY,NW CHINA
	K.ttartmann; B.Wunnemann; Hucai Zhang
来源期刊	Quaternary Sciences
ISSN	1001-7410
出版年	2009
卷号	29 期号:4 页码:687-695
英文摘要	The Ejina(Gaxun Nur)Basin-enclosed by the Tibetan Plateau in the south and the Gobi Altay in the north has continuously evolved as a strong continental endorheic depositional environment.Medium scale geomorphological mapping by Landsat-and Corona-Images as well as SRTM-topographic data,combined with field-surveys and geophysical investigation provides evidence for tectonic impact on sedimentary processes during the Late Quaternary.Analyses of SRTM-Data and Landsat-Images reveal a system of up to 20m high inverted channels developed on the inactive eastern part of the large Hei river drainage delta south of the ancient lake Juyanze.The complex evolution of these landforms requires a relative lowering of the lake basin at least two times since the last 40ka.A 26m high cliff section of gravel-covered lake sediments within the Juyanze paleolake indicates a strong subsidence of the lake bottom of 10m/1000yrs since 18kaB.P.North of Ejina river oasis a distinct north-south striking scarp up to 13m high constitutes the eastern margin of the Gaxun Nur.Palaeodrainage channels derived from the Gobi Altay.They display a sinistral offset of some decametres along a set of WE-trending faults.The rhombic shape of the modern dry Gaxun Nur,fossil cliffs,well preserved beach ridges along the margins of the palaeolake system as well as gravel covered topsets of lacustrine sediments indicate local displacements of morphological features.The displacements of lake sediments at the southern margin of the modern Gaxun Nut Basin imply a subsidence of at least 0.81m/1000 yrs since 25kaB.P.as a result of a pull-apart development due to the left stepping faults in a sinistral system.
英文关键词	neotectonic impact climate sedimentary basin Ejina
类型	Article
语种	英语
收录类别	CSCD
WOS研究方向	Geology
CSCD记录号	CSCD:3592068
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/335005
作者单位	K.ttartmann, Department of Earth Sciences,Freie Univerait(a)t Berlin, Berlin Germany.; B.Wunnemann, Department of Earth Sciences,Freie Univerait(a)t Berlin, Berlin Germany.; Hucai Zhang, Nanjing Institute of Geography and Limnology,Chinese Academy of Sciences, State Key Laboratory of Lake Science and Environment, Nanjing, Jiangsu 210008, China.
推荐引用方式 GB/T 7714	K.ttartmann,B.Wunnemann,Hucai Zhang. EVIDENCE OF NEOTECTONIC IMPACT ON A LARGE SEDIMENTARY BASIN BETWEEN TIBETAN PLATEAU AND GOBI ALTAY,NW CHINA[J],2009,29(4):687-695.
APA	K.ttartmann,B.Wunnemann,&Hucai Zhang.(2009).EVIDENCE OF NEOTECTONIC IMPACT ON A LARGE SEDIMENTARY BASIN BETWEEN TIBETAN PLATEAU AND GOBI ALTAY,NW CHINA.Quaternary Sciences,29(4),687-695.
MLA	K.ttartmann,et al."EVIDENCE OF NEOTECTONIC IMPACT ON A LARGE SEDIMENTARY BASIN BETWEEN TIBETAN PLATEAU AND GOBI ALTAY,NW CHINA".Quaternary Sciences 29.4(2009):687-695.