Knowledge Resource Center for Ecological Environment in Arid Area
DOI | 10.1017/S0954102010000167 |
Soil preservation and ventifact recycling from dry-based glaciers in Antarctica | |
Bockheim, James G. | |
通讯作者 | Bockheim, James G. |
来源期刊 | ANTARCTIC SCIENCE
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ISSN | 0954-1020 |
EISSN | 1365-2079 |
出版年 | 2010 |
卷号 | 22期号:4页码:409-417 |
英文摘要 | Soil preservation from three glacial thermal regimes was examined in the Transantarctic Mountains (TAM) using the University of Wisconsin Antarctic Soils Database (http://nsidc.org/data/ggd221). Glacial thermal regimes included temperate (wet-based) glaciers from overriding of the TAM prior to c. 15 Ma BP and subsequent polar (dry-based) glaciers. The glacial thermal regimes were distinguished from landform, sediment and erosional features. Buried soils were most common from deposition by dry-based glaciers (44 of 51 pedons). Several of these buried soils had a desert pavement intact with in situ ventifacts. Fifteen percent of the pedons contained recycled ventifacts in relict and buried soils that ranged from late Quaternary to Miocene in age, particularly in drift from dry-based glaciers (56 of 77 pedons). Overall 84% of the buried soils and 78% of the pedons with recycled ventifacts originated from dry-based glaciers. The proportion of soils with recycled clasts on a particular drift was greatest where the ratio of drift thickness to soil thickness ("recycling ratio") was the least. These data illustrate the effectiveness of Antarctic dry-based glaciers in preserving underlying landforms and deposits, including soils. Moreover, the data imply that Antarctic glaciers have been recycling clasts for the past c. 15 Ma. These findings have important implications in selecting surface boulders for cosmogenic dating. |
英文关键词 | boulder belt moraines buried soils recycled ventifacts Transantarctic Mountains |
类型 | Article |
语种 | 英语 |
国家 | USA |
收录类别 | SCI-E |
WOS记录号 | WOS:000280934100009 |
WOS关键词 | ICE-SURFACE FLUCTUATIONS ; CENTRAL WRIGHT VALLEY ; TRANSANTARCTIC MOUNTAINS ; DEVELOPMENT RATES ; CLIMATE-CHANGE ; TAYLOR VALLEY ; SIRIUS GROUP ; LATE NEOGENE ; BASAL ICE ; ROSS SEA |
WOS类目 | Environmental Sciences ; Geography, Physical ; Geosciences, Multidisciplinary |
WOS研究方向 | Environmental Sciences & Ecology ; Physical Geography ; Geology |
资源类型 | 期刊论文 |
条目标识符 | http://119.78.100.177/qdio/handle/2XILL650/163207 |
作者单位 | (1)Univ Wisconsin, Dept Soil Sci, Madison, WI 53706 USA |
推荐引用方式 GB/T 7714 | Bockheim, James G.. Soil preservation and ventifact recycling from dry-based glaciers in Antarctica[J],2010,22(4):409-417. |
APA | Bockheim, James G..(2010).Soil preservation and ventifact recycling from dry-based glaciers in Antarctica.ANTARCTIC SCIENCE,22(4),409-417. |
MLA | Bockheim, James G.."Soil preservation and ventifact recycling from dry-based glaciers in Antarctica".ANTARCTIC SCIENCE 22.4(2010):409-417. |
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