The Gondwana Plate margin in the Weddell Sea sector: Zircon geochronology of Upper Paleozoic (mainly Permian) strata from the Ellsworth Mountains and eastern Ellsworth Land, Antarctica

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dc.contributor.authorElliot, D.H.
dc.contributor.authorFanning, Christopher
dc.contributor.authorLaudon, Thomas S.
dc.date.accessioned2015-12-10T22:41:29Z
dc.date.issued2014
dc.date.updated2015-12-09T11:08:20Z
dc.description.abstractZircon geochronology has been applied to upper Paleozoic (mainly Permian) strata from the Ellsworth Mountains and from enigmatic outcrops in eastern Ellsworth Land to aid in constraining their locations in the Weddell Sea sector of the Gondwana plate margin. Detrital zircons from two Polarstar Formation (Ellsworth Mountains) sandstones yielded maximum depositional ages of ~ 270. Ma and ~ 260. Ma. Detrital zircons from Permian beds at Erehwon Nunatak and beds of uncertain age at FitzGerald Bluffs, both in eastern Ellsworth Land, gave maximum depositional ages of ~ 264. Ma and ~ 525. Ma respectively. Two Polarstar Formation tuffs gave ages of 258.0. ± 2.1. Ma and 262.6. ± 2.2. Ma. The Polarstar Formation probably spans the entire Permian. The quartzite at FitzGerald Bluffs is comparable in composition and detrital zircon signature to Devonian sandstones in both the Ellsworth and Transantarctic Mountains. Evaluation of the Polarstar Formation with respect to Permian strata in the southern Karoo and Falkland Islands suggests deposition in a separate and distinct basin, which was related to that in the Transantarctic Mountains. A separate depositional basin forms an additional constraint on the location of the Ellsworth-Whitmore block adjacent to the Coats Land/Pensacola Mountains region. The eastern Ellsworth Land outcrops are inferred to document a small continental block located proximal to the Ellsworth-Whitmore Mountains block during Gondwana time.
dc.identifier.issn1342-937X
dc.identifier.urihttp://hdl.handle.net/1885/57936
dc.publisherElsevier
dc.sourceGondwana Research
dc.titleThe Gondwana Plate margin in the Weddell Sea sector: Zircon geochronology of Upper Paleozoic (mainly Permian) strata from the Ellsworth Mountains and eastern Ellsworth Land, Antarctica
dc.typeJournal article
local.bibliographicCitation.issue2014
local.bibliographicCitation.lastpage14
local.bibliographicCitation.startpage1
local.contributor.affiliationElliot, D.H., Ohio State University
local.contributor.affiliationFanning, Christopher, College of Physical and Mathematical Sciences, ANU
local.contributor.affiliationLaudon, Thomas S., University of Wisconsin-Oshkosh
local.contributor.authoremailu4029993@anu.edu.au
local.contributor.authoruidFanning, Christopher, u4029993
local.description.embargo2037-12-31
local.description.notesImported from ARIES
local.identifier.absfor040202 - Inorganic Geochemistry
local.identifier.absfor040313 - Tectonics
local.identifier.absfor040303 - Geochronology
local.identifier.absseo970104 - Expanding Knowledge in the Earth Sciences
local.identifier.ariespublicationu4027924xPUB421
local.identifier.citationvolumeOnline Early Version
local.identifier.doi10.1016/j.gr.2014.12.001
local.identifier.scopusID2-s2.0-84920606237
local.identifier.uidSubmittedByu4027924
local.type.statusPublished Version

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