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Nature of sediment dispersal off the Sepik River, Papua New Guinea: preliminary sediment budget and implications for margin processes

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dc.contributor Virginia Inst Marine Sci
dc.contributor William & Mary
dc.contributor College William & Mary
dc.contributor Virginia Institute Of Marine Science
dc.contributor Australian Institute Of Marine Science
dc.contributor Coll William & Mary
dc.contributor Australian Inst Marine Sci
dc.contributor Australian Institute Of Marine Science (aims) en
dc.contributor.author KNISKERN, T
dc.contributor.author KUEHL, SA
dc.contributor.author BRUNSKILL, GJ
dc.contributor.author FUGATE, D
dc.contributor.author MENEGHINI, L
dc.contributor.author BURNS, K
dc.date.accessioned 2013-02-28T06:50:54Z
dc.date.accessioned 2017-03-21T01:22:36Z
dc.date.accessioned 2013-02-28T06:50:54Z
dc.date.accessioned 2019-05-09T01:18:18Z
dc.date.available 2017-03-21T01:22:36Z
dc.date.available 2013-02-28T06:50:54Z
dc.date.available 2017-03-21T01:22:36Z
dc.date.available 2019-05-09T01:18:18Z
dc.date.issued 2004-12-01
dc.identifier 6304 en
dc.identifier.citation Kuehl S, Brunskill GJ, Burns KA, Fugate D, Kniskern T and Meneghini L (2004) Nature of sediment dispersal off the Sepik River, Papua New Guinea: Preliminary sediment budget and implications for margin processes. Continental Shelf Research. 24: 2417-2429. en
dc.identifier.issn 0278-4343
dc.identifier.uri http://epubs.aims.gov.au/11068/6304
dc.description Link to abstract/full text - http://dx.doi.org/10.1016/j.csr.2004.07.016 en
dc.description.abstract A sediment budget is constructed for the slope and narrow continental shelf off the Sepik River in order to estimate the relative importance of turbid Plumes versus bottom gravity transport through a near-shore submarine canyon in the dispersal of sediment across this collision margin. Pb-210 geochronology and inventories of Kasten cores are consistent with the northwestward dispersal of sediment from the river mouth via hypopycnal and possible isopycnal plumes. Sediment accumulation rates are similar to5 cm yr(-1) on the upper slope just off of the Sepik mouth, decreasing gradually to similar to1 cm yr(-1) toward the northwest, and decreasing abruptly offshore (<0.2cm yr(-1) at 1200 m water depth). A sediment budget indicates that only about 7-15% of the Sepik River sediment discharge accumulates on the adjacent open shelf and slope. The remainder presumably escapes offshore via gravity flows through a submarine canyon, the head of which extends into the river mouth. The divergent sediment pathways observed off the Sepik River (i.e., surface and subsurface plumes versus sediment gravity flows through a canyon) may be common along high-yield collision margins of the Indo-Pacific archipelago, and perhaps are analogous to most margins during Late Quaternary low sea-level conditions. (C) 2004 Elsevier Ltd. All rights reserved.
dc.description.uri http://dx.doi.org/10.1016/j.csr.2004.07.016 en
dc.language English
dc.language en en
dc.relation.ispartof Null
dc.relation.ispartof Continental Shelf Research - pages: 24: 2417-2429 en
dc.subject Papua New Guinea
dc.subject Continental Margin
dc.subject Amazon Continental-shelf
dc.subject Holocene
dc.subject Australia
dc.subject Sepik River
dc.subject Example
dc.subject Accumulation
dc.subject Currents
dc.subject Sediment Budget
dc.subject Sediment Dispersal
dc.subject Oceanography
dc.subject Muds
dc.title Nature of sediment dispersal off the Sepik River, Papua New Guinea: preliminary sediment budget and implications for margin processes
dc.type journal article en
dc.identifier.doi 10.1016/j.csr.2004.07.016
dc.identifier.wos WOS:000225757100008


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