Arid
DOI10.1016/j.quascirev.2006.11.014
Cenozoic landscape evolution of an East Antarctic oasis (Radok Lake area, northern Prince Charles Mountains), and its implications for the glacial and climatic history of Antarctica
Hambrey, M. J.; Glasser, N. F.; McKelvey, B. C.; Sugden, D. E.; Fink, D.
通讯作者Hambrey, M. J.
来源期刊QUATERNARY SCIENCE REVIEWS
ISSN0277-3791
出版年2007
卷号26期号:5-6页码:598-626
英文摘要

Ice-free areas Antarctica reveal a multi-million year history of landscape evolution, but most attention up to now has focused on the Transantarctic Mountains. The Amery Oasis in the northern Prince Charles Mountains borders the Lambert Glacier-Amery Ice Shelf System that drains 1 million km(2) of the East Antarctic Ice Sheet, and therefore provides a record of fluctuations of both local and regional ice since the ice sheet first formed in early Oligocene time. This glacial record has been deciphered by (i) geomorphological mapping from aerial photographs and on the ground, (ii) documenting the relationship between thick well-dated, uplifted glaciomarine strata and the underlying palaeolandscape, (iii) examining surficial sediment facies, and (iv) surface-exposure dating using Be-10 and Al-26. The SE Amery Oasis records at least 10 million years of landscape evolution beginning with a pre-late Miocene phase of glacial erosion, followed by deposition of glaciomarine strata of the Battye Glacier Formation (Pagodroma Group) in late Miocene time. A wet-based ice sheet next expanded over the SE Amery Oasis, following which deposition of the glaciomarine Pliocene Bardin Bluffs Formation (Pagodroma Group) took place. Both formations were uplifted;, by at least 500 and 200m, respectively. Their tops are characterised by geomorphological surfaces upon which intensive periglacial activity took place. Higher-level bedrock areas were subjected to deep weathering and torformation. Early Pleistocene time was characterised by expansion of a cold-based ice sheet across the whole area, but it left little more than patches of sandy gravel and erratic blocks. Late Pleistocene expansion of local ice (the Battye Glacier) saw deposition of moraine-mound complexes on low ground around Radok Lake and ice-dammed lake phenomena. Subglacial drainage of the lake escaped to the east exhuming the sediment-filled gorges. Holocene landscape modification has been relatively superficial. Overall, the landscape of the Amery Oasis evolved primarily under the influence of wet-based (probably polythermal) glaciers in Miocene and Pliocene times, whereas the Quaternary Period was characterised mainly by cold-based glaciers that had comparatively little impact on the landscape. (c) 2006 Elsevier Ltd. All rights reserved.


类型Article
语种英语
国家Wales ; Australia ; Scotland
收录类别SCI-E
WOS记录号WOS:000245961600004
WOS关键词SOUTHERN VICTORIA-LAND ; FLAGSTONE BENCH FORMATION ; BAINMEDART COAL MEASURES ; ICE-SHEET DYNAMICS ; PRYDZ BAY-REGION ; SIRIUS-GROUP ; DRY-VALLEYS ; TRANSANTARCTIC MOUNTAINS ; PAGODROMA-GROUP ; AMERY OASIS
WOS类目Geography, Physical ; Geosciences, Multidisciplinary
WOS研究方向Physical Geography ; Geology
资源类型期刊论文
条目标识符http://119.78.100.177/qdio/handle/2XILL650/155806
作者单位(1)Univ Wales, Inst Geog & Earth Sci, Ctr Glaciol, Aberystwyth SY23 3DB, Dyfed, Wales;(2)Univ New England, Div Earth Sci, Armidale, NSW 2351, Australia;(3)Univ Edinburgh, Sch Geosci, Inst Geog, Edinburgh EH8 9XP, Midlothian, Scotland;(4)Australian Nucl Sci & Technol Org, Inst Environm Res, Menai, NSW 2234, Australia
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Hambrey, M. J.,Glasser, N. F.,McKelvey, B. C.,et al. Cenozoic landscape evolution of an East Antarctic oasis (Radok Lake area, northern Prince Charles Mountains), and its implications for the glacial and climatic history of Antarctica[J],2007,26(5-6):598-626.
APA Hambrey, M. J.,Glasser, N. F.,McKelvey, B. C.,Sugden, D. E.,&Fink, D..(2007).Cenozoic landscape evolution of an East Antarctic oasis (Radok Lake area, northern Prince Charles Mountains), and its implications for the glacial and climatic history of Antarctica.QUATERNARY SCIENCE REVIEWS,26(5-6),598-626.
MLA Hambrey, M. J.,et al."Cenozoic landscape evolution of an East Antarctic oasis (Radok Lake area, northern Prince Charles Mountains), and its implications for the glacial and climatic history of Antarctica".QUATERNARY SCIENCE REVIEWS 26.5-6(2007):598-626.
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