Arid
DOI10.1016/j.geomorph.2006.05.005
Quaternary bedrock erosion and landscape evolution in the Sor Rondane Mountains, East Antarctica: Reevaluating rates and processes
Matsuoka, Norikazu; Thomachot, Celine E.; Oguchi, Chiaki T.; Hatta, Tamao; Abe, Masahiro; Matsuzaki, Hiroyuki
通讯作者Matsuoka, Norikazu
来源期刊GEOMORPHOLOGY
ISSN0169-555X
出版年2006
卷号81期号:3-4页码:408-420
英文摘要

Rates and processes of rock weathering, soil formation, and mountain erosion during the Quaternary were evaluated in an inland Antarctic cold desert. The fieldwork involved investigations of weathering features and soil profiles for different stages after deglaciation. Laboratory analyses addressed chemistry of rock coatings and soils, as well as Be-10 and Al-26 exposure ages of the bedrock. Less resistant gneiss bedrock exposed over 1 Ma shows stone pavements underlain by in situ produced silty soils thinner than 40 cm and rich in sulfates, which reflect the active layer thickness, the absence of cryoturbation, and the predominance of salt weathering. During the same exposure period, more resistant granite bedrock has undergone long-lasting cavernous weathering that produces rootless mushroom-like boulders with a strongly Fe-oxidized coating. The red coating protects the upper surface from weathering while very slow microcracking progresses by the growth of sulfates. Geomorphological evidence and cosmogenic exposure ages combine to provide contrasting average erosion rates. No erosion during the Quaternary is suggested by a striated roche moutonnee exposed more than 2 Ma ago. Differential erosion between granite and gneiss suggests a significant lowering rate of desert pavements in excess of 10 m Ma(-1). The landscape has been (on the whole) stable, but the erosion rate varies spatially according to microclimate, geology, and surface composition. (c) 2006 Elsevier B.V. All rights reserved.


英文关键词Antarctica weathering soil erosion cosmogenic exposure age
类型Article
语种英语
国家Japan ; France
收录类别SCI-E
WOS记录号WOS:000242879700013
WOS关键词DRY VALLEYS ; EXPOSURE AGES ; COSMOGENIC NUCLIDES ; COLD DESERT ; IN-SITU ; BE-10 ; AL-26 ; LANDFORM ; HISTORY
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/2XILL650/151540
作者单位(1)Univ Tsukuba, Grad Sch Life & Environm Sci, Tsukuba, Ibaraki 3058572, Japan;(2)Univ Reims, Grp Etud Geomat & Environm Nat & Anthrop, F-51100 Reims, France;(3)Saitama Univ, Geosphere Res Inst, Urawa, Saitama 3388570, Japan;(4)Japan Int Res Ctr Agr Sci, Tsukuba, Ibaraki 3058686, Japan;(5)Univ Tokyo, Nucl Sci & Technol Res Ctr, Tokyo 1130032, Japan
推荐引用方式
GB/T 7714
Matsuoka, Norikazu,Thomachot, Celine E.,Oguchi, Chiaki T.,et al. Quaternary bedrock erosion and landscape evolution in the Sor Rondane Mountains, East Antarctica: Reevaluating rates and processes[J],2006,81(3-4):408-420.
APA Matsuoka, Norikazu,Thomachot, Celine E.,Oguchi, Chiaki T.,Hatta, Tamao,Abe, Masahiro,&Matsuzaki, Hiroyuki.(2006).Quaternary bedrock erosion and landscape evolution in the Sor Rondane Mountains, East Antarctica: Reevaluating rates and processes.GEOMORPHOLOGY,81(3-4),408-420.
MLA Matsuoka, Norikazu,et al."Quaternary bedrock erosion and landscape evolution in the Sor Rondane Mountains, East Antarctica: Reevaluating rates and processes".GEOMORPHOLOGY 81.3-4(2006):408-420.
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