Erosion rates on subalpine paleosurfaces in the western Mediterranean by in-situ 10Be concentrations in granites: implications for surface processes and long-term landscape evolution in Corsica (France)

Erosion rates on subalpine paleosurfaces in the western Mediterranean by in-situ 10Be concentrations in granites: implications for surface processes and long-term landscape evolution in Corsica (France)
复制标题

花岗岩中 10Be 原位浓度对地中海西部亚高山古地表的侵蚀率:对科西嘉岛地表过程和长期景观演化的影响(法国)

DOI:
10.1007/s00531-007-0169-z
复制
发表时间:
2007
影响因子:
2.3
通讯作者:
Frisch
Frisch
中科院分区:
地球科学3区
文献类型:
--
作者:
Kuhlemann;van der Borg;Danisik;Frisch

文献摘要

参考文献

被引文献

相似文献

对科西嘉岛中新世高海拔古地表花岗岩原位 10Be 浓度的侵蚀率研究表明,最大侵蚀率在 8 至 24 毫米/年之间。测得的侵蚀率的区域分布表明,当地的气候条件,即降水量、花岗岩的岩相成分和脆性变形程度控制着侵蚀率。在目前的亚高山气候条件下,即使在海拔 2,000 米左右,化学侵蚀也占主导地位。现场证据表明,侵蚀是通过连续溶解和/或颗粒崩解(谷粒化)来进行的。就推断的早中新世景观的保存而言,侵蚀率相对较高。我们推断中新世的时间埋藏和新近纪直到~3Ma的侵蚀率显着降低,以解释古地表的保存,与裂变径迹数据一致。山谷切割率比山顶表面的侵蚀率高得多,导致地势增强和长期均衡的表面隆起。另一方面,周期性冰川作用导致山谷变宽和加深,逐渐破坏了山顶的地表遗迹。
A study of erosion rates by in-situ10Be concentrations in granites of Miocene high-elevation paleosurfaces in Corsica indicates maximum erosion rates between 8 and 24 mm/kyear. The regional distribution of measured erosion rates indicates that the local climatic conditions, namely precipitation, the petrographic composition of granites, and the degree of brittle deformation govern erosion rates. Chemical erosion dominates even at elevations around 2,000 m in presently subalpine climate conditions. Field evidence indicates that erosion operates by continuous dissolution and/or disintegration to grains (grusification). The erosion rates are relatively high with respect to the preservation of inferred Early Miocene landscapes. We infer temporal burial in the Middle Miocene and significantly lower erosion rates in the Neogene until ∼3 Ma to explain the preservation of paleosurfaces, in line with fission track data. Valley incision rates that are a magnitude higher than erosion rates on summit surfaces result in relief enhancement and long-term isostatic surface uplift. On the other hand, widening and deepening of valleys by cyclic glaciation progressively destroys the summit surface relics.
DOI: 10.1111/j.1365-3121.1995.tb00538.x
发表时间: 1995
期刊: Terra Nova
影响因子: 2.4
作者:
L. Vigliotti;V. Langenheim
通讯作者: V. Langenheim
科西嘉新近纪的伟大特征
DOI: --
发表时间: 1976
期刊:
影响因子: --
作者:
F. Orszag;M. Pilot
通讯作者: M. Pilot
DOI: --
发表时间: 1956
期刊:
影响因子: --
作者:
W. Klaer
通讯作者: W. Klaer
对 Tibor J. Dunai 的“原位产生的宇宙核素生产率的缩放因子:关键的重新评估”的评论
DOI: --
发表时间: 2001
期刊:
影响因子: --
作者:
D. Desilets;M. Zreda;N. Lifton
通讯作者: N. Lifton
Movements verticaux actuels de la Corse (法国) par comparaison de nivellements
DOI: --
发表时间: 1996
期刊:
影响因子: --
作者:
N. Lenôtre;J. Ferrandini;M. Delfau;J. Panighi
通讯作者: J. Panighi