气候变化领域集成服务门户(CCPortal): NATURE AND GENESIS OF TILL SILT PELLETS FROM THE SHUANGHU AREA, CENTRAL TIBETAN PLATEAU, CHINA

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DOI	10.2747/0272-3646.31.6.493
	NATURE AND GENESIS OF TILL SILT PELLETS FROM THE SHUANGHU AREA, CENTRAL TIBETAN PLATEAU, CHINA
	Li, Dewen; Li, Yingkui; Dong, Guocheng; Wang, Liqiang
通讯作者	Li, DW (通讯作者)
发表日期	2010
ISSN	0272-3646
起始页码	493
结束页码	507
卷号	31 期号:6
英文摘要	Distinctive silt pellets were identified in a diamicton profile, 1 km north of the town of Shuanghu on the central Tibetan Plateau. The characteristics (mineral composition, texture, structure, fabric, and striations) of the diamicton indicate that it was formed under ice as subglacial melt-out or lodgment till. Comparing the shape, size, grain composition, and preservation of the pellets in this area with published pellet studies, we conclude that silt pellets from the Shuanghu area are formed by in situ melting out of dead ice (containing pellets) within subglacial till. We estimate that the till was deposited no later than Marine Isotope Stage (MIS) 8, based on nearby numerical ages for post-glacial fluvial terraces and the overall Quaternary glaciation history of the Tibetan Plateau. This is the first time that silt pellets have been identified in glacial deposits on the Tibetan Plateau. Detailed examination of the characteristics and formation of silt pellets has the potential to provide new insight into the basal condition of paleo-glaciers on the Tibetan Plateau.
关键词	FREEZE-ON MECHANISM GREENLAND ICE-SHEET RICH BASAL ICE SUBGLACIAL PROCESSES SEDIMENT WATER FLOW DEFORMATION GLACIATIONS DEPOSITS
英文关键词	silt pellets; subglacial environment; lodgment till; Shuanghu; Tibetan Plateau
语种	英语
WOS研究方向	Environmental Sciences & Ecology ; Physical Geography ; Geology ; Meteorology & Atmospheric Sciences
WOS类目	Environmental Sciences ; Geography, Physical ; Geosciences, Multidisciplinary ; Meteorology & Atmospheric Sciences
WOS记录号	WOS:000285920400003
来源期刊	PHYSICAL GEOGRAPHY
来源机构	中国科学院青藏高原研究所
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/257776
推荐引用方式 GB/T 7714	Li, Dewen,Li, Yingkui,Dong, Guocheng,et al. NATURE AND GENESIS OF TILL SILT PELLETS FROM THE SHUANGHU AREA, CENTRAL TIBETAN PLATEAU, CHINA[J]. 中国科学院青藏高原研究所,2010,31(6).
APA	Li, Dewen,Li, Yingkui,Dong, Guocheng,&Wang, Liqiang.(2010).NATURE AND GENESIS OF TILL SILT PELLETS FROM THE SHUANGHU AREA, CENTRAL TIBETAN PLATEAU, CHINA.PHYSICAL GEOGRAPHY,31(6).
MLA	Li, Dewen,et al."NATURE AND GENESIS OF TILL SILT PELLETS FROM THE SHUANGHU AREA, CENTRAL TIBETAN PLATEAU, CHINA".PHYSICAL GEOGRAPHY 31.6(2010).