Test the topographic steady state in an active mountain belt
The landscape evolution is the window to the link between deep earth and surface processes.One of the key issues in landscape evolution is to characterize the topographic steady state of mountain belts.The Taiwan mountain belt is an extraordinary case due to its extremely high uplift rates and denudation rates.The uplift of Taiwan Island is caused by the oblique collision between the Luzon Arc and the East Asian continent.In this case,the mountain building process in the north is always earlier than that in the south,which causes the spatial distribution of steady-state regions.The East Central Range receives much research attention with the river basins mainly distributing along the trajectory of the collision propagation.Normally,based on analyses of geomorphic parameters,the whole Central Range,or at least part of it,should be at a topographic steady state.However,it is seldom tested whether the balance between uplift rates and denudation rates exists in these regions.In this contribution,we make a comprehensive literature review on the uplift and denudation rates derived from various approaches including sediment yields,in situ 10Be,incision of river channels,thermochronology and GPS observations.It proves that the topographic steady state prevails in the middle part of the East Central Range.However,an obvious inconsistency in denudation rates calculated by different methods prevents us from better constraining the topographic steady state in other parts of this mountain range.
Taiwan uplift denudation river profile sediment yield in situ 10Be
Kai Deng Shouye Yang
State Key Laboratory of Marine Geology,Tongji University,Shanghai 200092,China
国际会议
The 11th International Symposium on Geochemistry of the Earths Surface(GES-11)(第十一届地球表层地球化学国际研讨会)
贵阳
英文
1-4
2017-06-11（万方平台首次上网日期，不代表论文的发表时间）