Definition of the Quaternary Qiangtang Paleolake in Qinghai-Tibetan;Plateau, China

doi:10.1111/1755-6724.12071

CORC > 中国地质调查局 > 中国地质调查局 > 中国地质科学院矿产资源研究所

	Definition of the Quaternary Qiangtang Paleolake in Qinghai-Tibetan;Plateau, China
	Shao Zhaogang 3; Meng Xian'gang ; Han Jian'en ; Zhu Dagang ; Yang Chaobin 1; Wang Jin ; Yu Jia ; Wang Yan ; He Chengguang
刊名	ACTA GEOLOGICA SINICA-ENGLISH EDITION
	2013
卷号	87 期号:2 页码:607-617
关键词	Quaternary Paleolake Tectonic Landform Lacustrine Evolution Qinghai-Tibetan Plateau
ISSN号	1000-9515
DOI	10.1111/1755-6724.12071
英文摘要	Since the Quaternary, many lakes have been present in the Qinghai-Tibetan Plateau. As peculiar geological processes in the evolution of the uplifting of Qinghai-Tibetan Plateau, the distributions and evolutions of the Quaternary paleolakes in the Qinghai-Tibetan Plateau have been the focus of interest among the international geosciences circle. Comparisons of the newly obtained and existing data from field surveys, remote sensing images, characteristics of tectonic landforms and distribution of the lacustrine strata, the author have, for the first time, defined a large-sized Quaternary Qiangtang Paleolake. The paleolake starts from the east-westerly direction at Rutog in western Tibet, passing through Gerze, and finally ends at Nagqu in eastern Tibet. Its length is approximately 1,200 km; it is about 420 km at its widest point (north-southerly). The Paleolake forms an E-W (or NWW) ellipsoid with an estimated area of 354920 km2. The Paleolake is bordered by the Mts. Gangdise and Nyainqentanglha to the south and the Karakorum Pass-Toze Kangri-Zangbagangri- Tanggula Pass to the north. It generally appears as a basinal landform with low mountains and valleys in the central part (altitudes of 4400 m) and higher altitudes (5000 m) in the peripheries. The formation and development of the Paleolake was controlled by the nearly E-W trending structures. There are three east-westerly extending tectonic sutures inside the Paleolake area, from north to south: (1) the Shuanghu Suture; (2) the Bangong Co-Nujiang River Suture; (3) the Shiquanhe-Lhari Suture. These three sutures have generally controlled the spreading features of the Paleolake and act as the first grade lake-controlling structures. In the southern Paleolake basin, there are a series of south-northerly rift basins, which are controlled by the normal faults and exist as a series of south-northerly grabens and semi-graben faulted basins. The south-northerly rift zones have clearly exerted control over the south margin of the Paleolake as well as the distribution of the residual lake basins after the Paleolake's break up. They are the secondary lake-controlling tectonics. Discoveries of the lacustrine strata inside the Plateau, especially the successive discoveries of many high-stand lacustrine strata, are direct evidence supporting the existence of the paleolakes in the Plateau. The dating results of the lake-eroded travertine in the Dong Co in the hinterland of the Quaternary Qiangtang Paleolake have revealed that the lake-eroded travertine is of Late Pleistocene sediments. By considering the analysis of the lacustrine strata as well, the researchers have revealed that the Quaternary Qiangtang Paleolake begins its embryonic form in the Early Pleistocene, successively develops till the Middle Pleistocene, and reaches its full blossom in the middle stage of the Late Pleistocene; it further shrinks and separates by the end of the Late Pleistocene, and finally ceases its whole life as the paleolake. After the Holocene, the huge Late Pleistocene Qiangtang Paleolake no longer exists, leaving a series of widely distributed smaller lakes on the Qiangtang Plateau. These smaller, isolated water systems receive the Holocene lacustrine sediments.
学科主题	第四纪地质
WOS关键词	EVOLUTION ; UPLIFT ; COLLISION ; ZONE
WOS研究方向	Geology
语种	英语
出版者	WILEY-BLACKWELL
WOS记录号	WOS:000318232600021
内容类型	期刊论文
源URL	[http://119.78.100.197/handle/2HKVOGP0/40201]
专题	中国地质科学院矿产资源研究所
作者单位	1.Chinese Acad Geol Sci, Inst Geomech, Beijing 100081, Peoples R China. 2.Tibetan Dept Land & Resources, Lhasa 850000, Tibet, Peoples R China. 3.中国地质科学院地质力学研究所
推荐引用方式 GB/T 7714	Shao Zhaogang,Meng Xian'gang,Han Jian'en,et al. Definition of the Quaternary Qiangtang Paleolake in Qinghai-Tibetan;Plateau, China[J]. ACTA GEOLOGICA SINICA-ENGLISH EDITION,2013,87(2):607-617.
APA	Shao Zhaogang.,Meng Xian'gang.,Han Jian'en.,Zhu Dagang.,Yang Chaobin.,...&He Chengguang.(2013).Definition of the Quaternary Qiangtang Paleolake in Qinghai-Tibetan;Plateau, China.ACTA GEOLOGICA SINICA-ENGLISH EDITION,87(2),607-617.
MLA	Shao Zhaogang,et al."Definition of the Quaternary Qiangtang Paleolake in Qinghai-Tibetan;Plateau, China".ACTA GEOLOGICA SINICA-ENGLISH EDITION 87.2(2013):607-617.