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学科主题: Geology
题名: Sediment fluxes and buffering in the post-glacial Indus Basin
作者: Clift, PD ; Giosan, L
通讯作者: pclift@lsu.edu ; lgiosan@whoi.edu
刊名: BASIN RESEARCH
发表日期: 2014
卷: 26, 期:3, 页:369-386
收录类别: sci
部门归属: [Clift, P. D.] Louisiana State Univ, Dept Geol & Geophys, Baton Rouge, LA 70803 USA ; [Clift, P. D.] Chinese Acad Sci, South China Sea Inst Oceanol, Guangzhou, Guangdong, Peoples R China ; [Giosan, L.] Woods Hole Oceanog Inst, Dept Geol & Geophys, Woods Hole, MA 02543 USA
项目归属: 海洋地质
资助者: Leverhulme Trust; University of Aberdeen; NERC; National Science Foundation; Woods Hole Oceanographic Institution
摘要: The Indus drainage has experienced major variations in climate since the Last Glacial Maximum (LGM) that have affected the volumes and compositions of the sediment reaching the ocean since that time. We here present a comprehensive first-order source-to-sink budget spanning the time since the LGM. We show that buffering of sediment in the floodplain accounts for ca. 20-25% of the mass flux. Sedimentation rates have varied greatly and must have been on average three times the recent, predamming rates. Much of the sediment was released by incision of fluvial terraces constructed behind landslide dams within the mountains, and especially along the major river valleys. New bedrock erosion is estimated to supply around 45% of the sedimentation. Around 50% of deposited sediment lies under the southern floodplains, with 50% offshore in large shelf clinoforms. Provenance indicators show a change of erosional focus during the Early Holocene, but no change in the Mid-Late Holocene because of further reworking from the floodplains. While suspended loads travel rapidly from source-to-sink, zircon grains in the bedload show travel times of 7-14kyr. The largest lag times are anticipated in the Indus submarine fan where sedimentation lags erosion by at least 10kyr.
原文出处: 查看原文
WOS记录号: WOS:000335657800002
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内容类型: 期刊论文
URI标识: http://ir.scsio.ac.cn/handle/344004/10622
Appears in Collections:中科院边缘海地质重点实验室_期刊论文

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Clift, PD; Giosan, L.Sediment fluxes and buffering in the post-glacial Indus Basin,BASIN RESEARCH,2014,26(3):369-386
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