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dc.contributor.authorGales, Jenny
dc.contributor.authorHillenbrand, C-D
dc.contributor.authorLarter, R
dc.contributor.authorLaberg, J-S
dc.contributor.authorMelles, M
dc.contributor.authorBenetti, S
dc.contributor.authorPasschier, S
dc.contributor.editorHogan K
dc.date.accessioned2017-12-06T14:20:57Z
dc.date.available2017-12-06T14:20:57Z
dc.date.issued2018-01-01
dc.identifier.urihttp://hdl.handle.net/10026.1/10383
dc.description.abstract

Trough Mouth Fans (TMFs) are sediment depocentres that form along high-latitude continental margins at the mouths of some cross-shelf troughs. They reflect the dynamics of past ice sheets over multiple glacial cycles and processes operating on (formerly) glaciated continental shelves and slopes, such as erosion, reworking, transport and deposition. The similarities and differences in TMF morphology and formation processes of the Arctic and Antarctic regions remain poorly constrained. Here, we analyse the dimensions and geometries of 15 TMFs from Arctic and Antarctic margins and the grain-size distribution of 82 sediment cores centred on them. We compare the grain-size composition of sub- and proglacial diamictons deposited on the shelves and glacigenic-debris flows (GDFs) deposited on the adjacent TMFs and find a significant difference between Arctic and Antarctic margins. Antarctic margins show a coarser grain-size composition for both GDFs and shelf diamictons. This significant difference provides insight into high-latitude sediment input, transportation and glacial/interglacial regimes. We suggest that surface run-off and river discharge are responsible for enhanced fine-grained sediment input in the Arctic compared to in the Antarctic.

dc.format.extent203-221
dc.language.isoen
dc.publisherGeological Society Special Publication
dc.relation.ispartofGlaciated Margins: The Sedimentary and Geophysical Archive
dc.titleProcesses influencing differences in Arctic and Antarctic Trough Mouth Fan sedimentology
dc.typechapter
plymouth.volume475
plymouth.publisher-urlhttps://www.geolsoc.org.uk/
plymouth.publication-statusAccepted
dc.identifier.doi10.1144/sp475.7
plymouth.organisational-group/Plymouth
plymouth.organisational-group/Plymouth/Faculty of Science and Engineering
plymouth.organisational-group/Plymouth/Faculty of Science and Engineering/School of Biological and Marine Sciences
plymouth.organisational-group/Plymouth/REF 2021 Researchers by UoA
plymouth.organisational-group/Plymouth/REF 2021 Researchers by UoA/UoA07 Earth Systems and Environmental Sciences
plymouth.organisational-group/Plymouth/Users by role
plymouth.organisational-group/Plymouth/Users by role/Academics
dc.rights.embargoperiodNot known
rioxxterms.versionofrecord10.1144/sp475.7
rioxxterms.licenseref.urihttp://www.rioxx.net/licenses/all-rights-reserved
rioxxterms.typeBook chapter


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