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Sediment fluxes and buffering in the post-glacial Indus Basin
Clift, PD; Giosan, L; pclift@lsu.edu; lgiosan@whoi.edu
2014
发表期刊BASIN RESEARCH
ISSN0950-091X
卷号26期号:3页码:369-386
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.
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
学科领域Geology
资助者Leverhulme Trust; University of Aberdeen; NERC; National Science Foundation; Woods Hole Oceanographic Institution ; Leverhulme Trust; University of Aberdeen; NERC; National Science Foundation; Woods Hole Oceanographic Institution ; Leverhulme Trust; University of Aberdeen; NERC; National Science Foundation; Woods Hole Oceanographic Institution ; Leverhulme Trust; University of Aberdeen; NERC; National Science Foundation; Woods Hole Oceanographic Institution
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收录类别sci
资助项目海洋地质
资助者Leverhulme Trust; University of Aberdeen; NERC; National Science Foundation; Woods Hole Oceanographic Institution ; Leverhulme Trust; University of Aberdeen; NERC; National Science Foundation; Woods Hole Oceanographic Institution ; Leverhulme Trust; University of Aberdeen; NERC; National Science Foundation; Woods Hole Oceanographic Institution ; Leverhulme Trust; University of Aberdeen; NERC; National Science Foundation; Woods Hole Oceanographic Institution
WOS记录号WOS:000335657800002
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文献类型期刊论文
条目标识符http://ir.scsio.ac.cn/handle/344004/10622
专题中科院边缘海地质重点实验室
通讯作者pclift@lsu.edu; lgiosan@whoi.edu
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Clift, PD,Giosan, L,pclift@lsu.edu,et al. Sediment fluxes and buffering in the post-glacial Indus Basin[J]. BASIN RESEARCH,2014,26(3):369-386.
APA Clift, PD,Giosan, L,pclift@lsu.edu,&lgiosan@whoi.edu.(2014).Sediment fluxes and buffering in the post-glacial Indus Basin.BASIN RESEARCH,26(3),369-386.
MLA Clift, PD,et al."Sediment fluxes and buffering in the post-glacial Indus Basin".BASIN RESEARCH 26.3(2014):369-386.
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