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Late Holocene fluctuations of Quelccaya Ice Cap, Peru, registered by nearby lake sediments

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dc.contributor.author Stroup, J.S.
dc.contributor.author Kelly, M.A.
dc.contributor.author Lowell, T.V.
dc.contributor.author Smith, C.A.
dc.contributor.author Beal, S.A.
dc.contributor.author Landis, J.D.
dc.contributor.author Tapia, P.M.
dc.date.accessioned 2019-02-22T14:55:28Z
dc.date.available 2019-02-22T14:55:28Z
dc.date.issued 2015
dc.identifier.uri https://hdl.handle.net/20.500.12866/5737
dc.description.abstract Records of clastic sediment from lakes that receive glacial meltwater provide a means for inferring past glacial fluctuations. However, increased clastic sedimentation has been interpreted to indicate both glacial advance and recession. Here we examine the timing of clastic sediment deposition in Challpacocha, a glacially fed lake located downvalley from Quelccaya Ice Cap (QIC), Peru, in comparison with known ice cap margin fluctuations. Using a comparison with a nearby non-glacial lake, Yanacocha, we document that a record of clastic sediment flux from Challpacocha reflects meltwater-derived sediment. We then compare the clastic sediment record from Challpacocha with the Qori Kalis glacier moraine record. We find that organic-rich sediment was deposited primarily during the late Holocene advance of QIC (before ~CE 1490). In contrast, clastic sediment was deposited during QIC recession (~CE 1490-1970). Peaks in clastic sediment flux are associated with the onset of ice retreat. We suggest that this pattern of clastic sediment deposition reflects changing meltwater production and/or glacial erosion during ice advance and retreat and supports models of increased clastic sedimentation during ice retreat. en_US
dc.language.iso eng
dc.publisher Wiley
dc.relation.ispartof urn:issn:1099-1417
dc.rights info:eu-repo/semantics/restrictedAccess
dc.rights.uri https://creativecommons.org/licenses/by-nc-nd/4.0/deed.es
dc.subject Peru en_US
dc.subject Holocene en_US
dc.subject Late Holocene en_US
dc.subject sedimentation en_US
dc.subject deposition en_US
dc.subject clastic sediment en_US
dc.subject Cuzco [Peru] en_US
dc.subject glacial lake en_US
dc.subject Glacially fed lakes en_US
dc.subject glacier dynamics en_US
dc.subject Glacier extents en_US
dc.subject ice cap en_US
dc.subject ice retreat en_US
dc.subject lacustrine deposit en_US
dc.subject Lake sediment en_US
dc.subject meltwater en_US
dc.subject moraine en_US
dc.subject Quelccaya Ice Cap en_US
dc.title Late Holocene fluctuations of Quelccaya Ice Cap, Peru, registered by nearby lake sediments en_US
dc.type info:eu-repo/semantics/article
dc.identifier.doi https://doi.org/10.1002/jqs.2821
dc.subject.ocde https://purl.org/pe-repo/ocde/ford#3.02.00 es_PE
dc.subject.ocde https://purl.org/pe-repo/ocde/ford#1.05.03

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