globalchange  > 过去全球变化的重建
DOI: 10.1016/j.quascirev.2014.09.009
Scopus记录号: 2-s2.0-84908544243
论文题名:
Quaternary landscape development, alluvial fan chronology and erosion of the Mecca Hills at the southern end of the San Andreas Fault zone
作者: Gray H.J.; Owen L.A.; Dietsch C.; Beck R.A.; Caffee M.A.; Finkel R.C.; Mahan S.A.
刊名: Quaternary Science Reviews
ISSN: 2773791
出版年: 2014
卷: 105
起始页码: 68
结束页码: 85
语种: 英语
英文关键词: Beryllium-10 ; Mecca Hills ; San Andreas Fault ; Surface exposure dating ; Terrestrial cosmogenic nuclides
Scopus关键词: Alluvial fans ; Landscape development ; Mecca Hills ; San Andreas fault ; Surface exposure dating ; Terrestrial cosmogenic nuclides ; alluvial fan ; beryllium isotope ; boulder ; cosmogenic radionuclide ; data set ; denudation ; fault zone ; geochronology ; geomorphology ; landscape evolution ; Quaternary ; sediment transport ; transpression ; uplift ; California ; San Andreas ; San Jacinto ; United States
英文摘要: Quantitative geomorphic analysis combined with cosmogenic nuclide 10Be-based geochronology and denudation rates have been used to further the understanding of the Quaternary landscape development of the Mecca Hills, a zone of transpressional uplift along the southern end of the San Andreas Fault, in southern California. The similar timing of convergent uplifts along the San Andreas Fault with the initiation of the sub-parallel San Jacinto Fault suggest a possible link between the two tectonic events. The ages of alluvial fans and the rates of catchment-wide denudation have been integrated to assess the relative influence of climate and tectonic uplift on the development of catchments within the Mecca Hills. Ages for major geomorphic surfaces based on 10Be surface exposure dating of boulders and 10Be depth profiles define the timing of surface stabilization to 2.6+5.6/-1.3 ka (Qyf1 surface), 67.2±5.3 ka (Qvof2 surface), and 280±24 ka (Qvof1 surface). Comparison of 10Be measurements from active channel deposits (Qac) and fluvial terraces (Qt) illustrate a complex history of erosion, sediment storage, and sediment transport in this environment. Beryllium-10 catchment-wide denudation rates range from 19.9±3.2 to 149±22.5m/Ma and demonstrate strong correlations with mean catchment slope and with total active fault length normalized by catchment area. The lack of strong correlation with other geomorphic variables suggests that tectonic uplift and rock weakening have the greatest control. The currently measured topography and denudation rates across the Mecca Hills may be most consistent with a model of radial topographic growth in contrast to a model based on the rapid uplift and advection of crust. © 2014 Published by Elsevier Ltd.
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/60113
Appears in Collections:过去全球变化的重建

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作者单位: U.S. Geological Survey, Box 25046 MS 974, Denver, CO, United States; Department of Geology, University of Cincinnati, Cincinnati, OH, United States; Department of Geography, University of Cincinnati, Cincinnati, OH, United States; Department of Physics/PRIME Laboratory, Purdue University, West Lafayette, IN, United States; Department of Earth and Planetary Sciences, University of California, Berkeley, CA, United States

Recommended Citation:
Gray H.J.,Owen L.A.,Dietsch C.,et al. Quaternary landscape development, alluvial fan chronology and erosion of the Mecca Hills at the southern end of the San Andreas Fault zone[J]. Quaternary Science Reviews,2014-01-01,105
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