DOI: 10.1016/j.gloplacha.2013.09.003
论文题名: Climatic and tectonic control on fluvial and alluvial fan sequence formation in the Central Makran Range, SE-Iran
作者: Kober F. ; Zeilinger G. ; Ivy-Ochs S. ; Dolati A. ; Smit J. ; Kubik P.W.
刊名: Global and Planetary Change
ISSN: 0921-8183
出版年: 2013
卷: 111 起始页码: 133
结束页码: 149
语种: 英语
英文关键词: Climate
; Cosmogenic nuclides
; Makran
; Monsoon
; Tectonics
; Terraces
Scopus关键词: Climate
; Cosmogenic nuclides
; Makran
; Monsoon
; Terraces
; Atmospheric thermodynamics
; Catchments
; Isotopes
; Tectonics
; alluvial fan
; climate conditions
; correlation
; geomorphology
; monsoon
; Pleistocene
; spatiotemporal analysis
; tectonics
; terrace
; uplift
; Iran
; Makran
英文摘要: The geomorphic evolution of the Makran Range of SE-Iran and SW-Pakistan has been controlled by the prevailing SW-Asian monsoon and Mediterranean winter rainfall climate and the surface uplift processes resulting from the Arabia-Eurasia collision. The impact of climate on Quaternary fluvial and alluvial sequence formation and their regional correlation has been little investigated due to limited age control of these sequences. Using 10Be cosmogenic nuclide exposure ages we established a Middle to Late Pleistocene terrace chronology. Our record tentatively indicates that terrace levels were abandoned towards the transition to or during warmer/pluvial periods (interglacials and/or interstadials) back to Marine Isotope Stage (MIS) 7, but abandoned ages show a large spread. It is hypothesized that pluvial phases correspond with times of enhanced SW-monsoons and a northward shift of the Intertropical Convergence Zone (ITCZ). Furthermore, orbital periodicities can be deduced on frequencies related to obliquity and precession cycles. Overall, caution has to be placed in sampling and interpreting alluvial deposits, which may have complex inheritance patterns and spatially and temporarily variable catchment erosion histories and terrace-channel dynamics.Beside the dominant climate control on terrace formation, elevated channel steepness indices around major thrusts and numerous knickpoints indicate an additionally tectonic influence on terrace formation. Local incision rates (mean ~0.6-0.8mm·a-1) are variable in space and time but are similar to uplift rates obtained from coastal terraces and thus suggest a regional surface uplift. © 2013 Elsevier B.V. URL: https://www.scopus.com/inward/record.uri?eid=2-s2.0-84884964898&doi=10.1016%2fj.gloplacha.2013.09.003&partnerID=40&md5=0f37632263e535fd4337e55ddcfd7a27
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/11089
Appears in Collections: 全球变化的国际研究计划
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作者单位: Geological Institute, ETH Zürich, 8092 Zürich, Switzerland
Recommended Citation:
Kober F.,Zeilinger G.,Ivy-Ochs S.,et al. Climatic and tectonic control on fluvial and alluvial fan sequence formation in the Central Makran Range, SE-Iran[J]. Global and Planetary Change,2013-01-01,111.