Centennial- to millennial-scale hard rock erosion rates deduced from luminescence-depth profiles
Centennial- to millennial-scale hard rock erosion rates deduced from luminescence-depth profiles
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从发光深度剖面推导出百年至千年尺度的硬岩侵蚀率
DOI:
10.1016/j.epsl.2018.04.017
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发表时间:
2018-07
影响因子:
5.3
通讯作者:
Benny Guralnik
中科院分区:
文献类型:
--
作者:
Reza Sohbati;Jinfeng Liu;Mayank Jain;Andrew Murray;David Egholm;Richard Paris;Benny Guralnik
The measurement of erosion and weathering rates in different geomorphic settings and over diverse temporal and spatial scales is fundamental to the quantification of rates and patterns of earth surface processes. A knowledge of the rates of these surface processes helps one to decipher their relative contribution to landscape evolution–information that is crucial to understanding the interaction between climate, tectonics and landscape. Consequently, a wide range of techniques has been developed to determine short-(< 10 2 a) and long-term (> 10 4 a) erosion rates. However, no method is available to quantify hard rock erosion rates at centennial to millennial timescales. Here we propose a novel technique, based on the solar bleaching of luminescence signals with depth into rock surfaces, to bridge this analytical gap. We apply our technique to glacial and landslide boulders in the Eastern Pamirs, China. The calculated erosion rates from the smooth varnished surfaces of 7 out of the 8 boulders sampled in this study vary between< 0.038±0.002 and 1.72±0.04 mm ka− 1 (the eighth boulder gave an anomalously high erosion rate, possibly due to a recent chipping/cracking loss of surface). Given this preferential sampling of smooth surfaces, assumed to arise from grain-by-grain surface loss, we consider these rates as minimum estimates of rock surface denudation rates in the Eastern Pamirs, China.
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DOI:
10.1007/978-1-4020-8895-7_4
发表时间:
2009
期刊:
--
影响因子:
--
作者:
Y. Shao
通讯作者:
Y. Shao
影响因子:
5.8
作者:
A. Draut;P. Clift
通讯作者:
A. Draut;P. Clift
DOI:
10.2307/506799
发表时间:
1998-09
期刊:
--
影响因子:
--
作者:
G. Rapp;M. Aitken
通讯作者:
G. Rapp;M. Aitken
影响因子:
2
作者:
J. Wallinga;A. Murray;A. Wintle
通讯作者:
J. Wallinga;A. Murray;A. Wintle
DOI:
--
发表时间:
1971
期刊:
--
影响因子:
--
作者:
Mathemalical Tables;M. Abramowitz;I. Stegun;A. G. Greenhill
通讯作者:
Mathemalical Tables;M. Abramowitz;I. Stegun;A. G. Greenhill