Links between erosion, runoff variability and seismicity in the Taiwan orogen

被引:778
作者
Dadson, SJ
Hovius, N
Chen, HG
Dade, WB
Hsieh, ML
Willett, SD
Hu, JC
Horng, MJ
Chen, MC
Stark, CP
Lague, D
Lin, JC
机构
[1] Univ Cambridge, Dept Earth Sci, Cambridge CB2 3EQ, England
[2] Natl Taiwan Univ, Dept Geosci, Taipei 10764, Taiwan
[3] Natl Taiwan Univ, Dept Geog, Taipei 10764, Taiwan
[4] Dartmouth Coll, Dept Earth Sci, Hanover, NH 03755 USA
[5] Univ Washington, Dept Earth & Space Sci, Seattle, WA 98195 USA
[6] Minist Econ Affairs, Water Resources Agcy, Taipei, Taiwan
[7] Taroko Natl Pk Headquarters, Fu Su Village 972, Hualien, Taiwan
[8] Columbia Univ, Lamont Doherty Earth Observ, Palisades, NY 10964 USA
基金
英国自然环境研究理事会;
关键词
D O I
10.1038/nature02150
中图分类号
O [数理科学和化学]; P [天文学、地球科学]; Q [生物科学]; N [自然科学总论];
学科分类号
07 ; 0710 ; 09 ;
摘要
The erosion of mountain belts controls their topographic and structural evolution(1 - 3) and is the main source of sediment delivered to the oceans(4). Mountain erosion rates have been estimated from current relief and precipitation, but a more complete evaluation of the controls on erosion rates requires detailed measurements across a range of timescales. Here we report erosion rates in the Taiwan mountains estimated from modern river sediment loads, Holocene river incision and thermochronometry on a million- year scale. Estimated erosion rates within the actively deforming mountains are high ( 3 - 6 mm yr(-1)) on all timescales, but the pattern of erosion has changed over time in response to the migration of localized tectonic deformation. Modern, decadal- scale erosion rates correlate with historical seismicity and storm- driven runoff variability. The highest erosion rates are found where rapid deformation, high storm frequency and weak substrates coincide, despite low topographic relief.
引用
收藏
页码:648 / 651
页数:4
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