The 580-520 Ma Gondwana suture of Madagascar and its continuation into Antarctica and Africa

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dc.contributor.authorBoger, Steven D.
dc.contributor.authorHirdes, W.
dc.contributor.authorFerreira, C.A.M.
dc.contributor.authorJenett, T.
dc.contributor.authorDallwig, R.
dc.contributor.authorFanning, Christopher
dc.date.accessioned2015-12-10T22:41:18Z
dc.date.issued2014
dc.date.updated2015-12-09T11:06:24Z
dc.description.abstractU-Pb age data from southwest Madagascar provide a compelling case that the pre-Gondwana Indian plate was stitched with the arc terranes of the Arabian Nubian Shield along a suture that closed between 580. Ma and 520. Ma. The key observations supportive of this interpretation are: (1) metamorphism dated to 630-600. Ma is manifested only on the west side of the suture in rocks that have affinities with the oceanic and island arc terranes of the Arabian Nubian Shield, or which represent continental rocks welded to these terranes prior to the amalgamation of Gondwana, and (2) orogenesis at 580-520. Ma is manifest in rocks on both sides of the suture, an observation taken to mark the timing of collision and to reflect spatial continuity across the suture. In southwest Madagascar the distribution of metamorphic ages places the suture along the Beraketa high-strain zone, the tectonic boundary between the Androyen and Anosyen domains. Similar age relationships allow for the extrapolation of this tectonic boundary into both East Antarctica and Africa.
dc.identifier.issn1342-937X
dc.identifier.urihttp://hdl.handle.net/1885/57836
dc.publisherElsevier
dc.sourceGondwana Research
dc.titleThe 580-520 Ma Gondwana suture of Madagascar and its continuation into Antarctica and Africa
dc.typeJournal article
local.bibliographicCitation.issue2014
local.bibliographicCitation.lastpage13
local.bibliographicCitation.startpage1
local.contributor.affiliationBoger, Steven D., University of Melbourne
local.contributor.affiliationHirdes, W., Bundesanstalt fur Geowissenschaften und Rohstoffe
local.contributor.affiliationFerreira, C.A.M., GaiaPix
local.contributor.affiliationJenett, T., GAF AG
local.contributor.affiliationDallwig, R., GAF AG
local.contributor.affiliationFanning, Christopher, College of Physical and Mathematical Sciences, ANU
local.contributor.authoremailu4029993@anu.edu.au
local.contributor.authoruidFanning, Christopher, u4029993
local.description.embargo2037-12-31
local.description.notesImported from ARIES
local.identifier.absfor040313 - Tectonics
local.identifier.absfor040303 - Geochronology
local.identifier.absseo970104 - Expanding Knowledge in the Earth Sciences
local.identifier.ariespublicationu4027924xPUB417
local.identifier.citationvolumeOnline Early Version
local.identifier.doi10.1016/j.gr.2014.08.017
local.identifier.scopusID2-s2.0-84908539495
local.identifier.uidSubmittedByu4027924
local.type.statusPublished Version

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