globalchange  > 过去全球变化的重建
DOI: 10.1007/s12594-019-1242-5
WOS记录号: WOS:000471294100003
论文题名:
Estimation of Paleo-ice Sheet Thickness and Evolution of Landforms in Schirmacher Oasis and Adjoining Area, cDML, East Antarctica
作者: Shrivastava, Prakash K.1; Roy, Sandip K.2; Srivastava, Hari B.3; Dharwadkar, Amit4
通讯作者: Shrivastava, Prakash K.
刊名: JOURNAL OF THE GEOLOGICAL SOCIETY OF INDIA
ISSN: 0016-7622
EISSN: 0974-6889
出版年: 2019
卷: 93, 期:6, 页码:638-644
语种: 英语
WOS关键词: LARSEMANN HILLS ; MAUD LAND ; SEDIMENTS ; CLIMATE
WOS学科分类: Geosciences, Multidisciplinary
WOS研究方向: Geology
英文摘要:

Quaternary period has witnessed perceptible climatic change in Schirmacher region, central Dronning Maud Land (cDML), East Antarctica. There were buildup of ice sheet and its recession throughout the period. The Schirmacher Oasis, Baalsrudfjellet, Veteheia and Veten nunataks are the prominent northernmost exposures in cDML area and play a major role in controlling the ice flow in this region resulting in glacial erosional as well as depositional landforms. These developments reveal vital information about the evolution of the region in Quaternary period. Erosional features such as roche-moutonees, glacially polished and abraded rocky outcrops with excellent preservation of glacial striations indicates the paleo-movement of overriding glaciers. Striations are generally preserved on polished surfaces of bedrock exposed on the high lands, however, glacial striations are also preserved over some mafic and resistant hard rocks in low lying areas. In general, the glacial striations indicate north-northeast movement of paleo ice sheet. Majority of the boulders in east-central valley show their longer axis trending in NNE-WSW to NE-SW directions. The cross cutting relation of striations give the changing directions of paleo ice sheet movement. Further, back calculation of depth of indentation and corresponding ice load gives a value of 100 to 500 m thick paleo-ice sheet in different parts of this region, documenting vast deglaciation in this region.


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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/139492
Appears in Collections:过去全球变化的重建

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作者单位: 1.Geol Survey India, State Unit Sikkim, Gangtok 737101, India
2.Geol Survey India, Cent Reg, Nagpur 440006, Maharashtra, India
3.Banaras Hindu Univ, Dept Geol, Varanasi 221005, Uttar Pradesh, India
4.Geol Survey India, Polar Studies Div, Faridabad 121001, India

Recommended Citation:
Shrivastava, Prakash K.,Roy, Sandip K.,Srivastava, Hari B.,et al. Estimation of Paleo-ice Sheet Thickness and Evolution of Landforms in Schirmacher Oasis and Adjoining Area, cDML, East Antarctica[J]. JOURNAL OF THE GEOLOGICAL SOCIETY OF INDIA,2019-01-01,93(6):638-644
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