-
- P. D. Clift
- Department of Geology and Geophysics Louisiana State University Baton Rouge LA USA
-
- L. Giosan
- Department of Geology and Geophysics Woods Hole Oceanographic Institution Woods Hole MA USA
書誌事項
- 公開日
- 2014-02-17
- 権利情報
-
- http://onlinelibrary.wiley.com/termsAndConditions#vor
- DOI
-
- 10.1111/bre.12038
- 公開者
- Wiley
この論文をさがす
説明
<jats:title>Abstract</jats:title><jats:p>The Indus drainage has experienced major variations in climate since the Last Glacial Maximum (<jats:styled-content style="fixed-case">LGM</jats:styled-content>) 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 <jats:styled-content style="fixed-case">LGM</jats:styled-content>. We show that buffering of sediment in the floodplain accounts for <jats:italic>ca</jats:italic>. 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 7–14 kyr. The largest lag times are anticipated in the Indus submarine fan where sedimentation lags erosion by at least 10 kyr.</jats:p>
収録刊行物
-
- Basin Research
-
Basin Research 26 (3), 369-386, 2014-02-17
Wiley
