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    National Tsing Hua University Institutional Repository > 歷任校長 > 沈君山 (1994-1997) > 期刊論文 >  Be-10 as a Tracer for the Rapid Erosion of Taiwan

    Please use this identifier to cite or link to this item: http://nthur.lib.nthu.edu.tw/dspace/handle/987654321/80850

    Title: Be-10 as a Tracer for the Rapid Erosion of Taiwan
    Authors: C. You;T. Lee;L. Brown;J.J. Shen;J.C. Chen
    教師: 沈君山
    Date: 1988
    Publisher: Meteoritical Society
    Relation: GEOCHIMICA ET COSMOCHIMICA ACTA, Meteoritical Society, Volume 52, Issue 11, NOV 1988, Pages 2687-2691
    Keywords: BE-10 STUDY
    Abstract: Cosmogenic 10 Be was measured using accelerator mass spectrometry in soils and sediments to study the erosion of Taiwan, which has the highest denudation rate in the world. The river sediments in Taiwan have very low 10 Be concentrations, around 5 million atoms per gram, about 1/45 the world wide average. This is the direct consequence of its high sediment yield of more than 1000 mg/cm 2 /yr, 70 times the world average. Combining these values we found that, for Taiwan as a whole, the 10 Be output to the sea only slightly exceeds the input from the rain, a situation typical of many areas around the world. Therefore, even in this example of extremely rapid erosion, 10 Be seems to remain a useful indicator for erosion status. The total 10 Be inventory found in a soil profile from a geologically stable area is at least 18% of the maximum possible inventory. The minimum age thus estimated for the soil is 0.11 Ma, in reasonable agreement with estimates from other means. The maximum erosion rate for this area thus estimated is at most 0.14 mg/cm 2 /yr, four orders of magnitude slower than the average value observed for Taiwan. We also demonstrate that the shelf sediments around Taiwan have received the admixing of a 10 Be rich component from the ocean and would give a poor estimate for material eroded from Taiwan.
    Relation Link: http://www.meteoriticalsociety.org/
    URI: http://nthur.lib.nthu.edu.tw/dspace/handle/987654321/80850
    Appears in Collections:[沈君山 (1994-1997)] 期刊論文
    [物理系] 期刊論文

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