Change search
ReferencesLink to record
Permanent link

Direct link
Neoproterozoic crustal growth at the margin of the East Gondwana continent - age and isotopic constraints from the easternmost inliers of Oman
Swedish Museum of Natural History, Department of Geology. (Nordsim)ORCID iD: 0000-0003-2227-577X
Stockholm University.
2016 (English)In: International Geology Review, ISSN 0020-6814, E-ISSN 1938-2839, Vol. 58, no 16, 2046-2064 p.Article in journal (Refereed) Published
Abstract [en]

The Jebel Ja’alan and Qalhat inliers of Oman represent the easternmost exposures in theArabian peninsula of Neoproterozoic basement associated with the East African orogen and the assembly of East and West Gondwana. These inliers expose tonalitic gneisses and metasediments intruded by granodiorites and granites of the Ja’alan batholith. Zircon from the gneisses yield U-Pb SIMS ages of ca. 900-880 Ma, which are interpreted as crystallisation ages. These represent the oldest magmatic events associated with the closure of theMozambique Ocean reported to date. Zircon of this age is also the dominant component in the metasediments. The Ja’alan batholith yields ages of ca. 840-825 Ma. Nd isotopes indicate that both the gneisses and the batholith range from juvenile to slightly more evolved, with εNd(t) of +6 to +1.5 interpreted to reflect variable contamination by older, evolved continental material;this is also indicated by >900 Ma detrital zircon from the metasediments. The Nd data also contrast with the uniformly juvenile signature of younger, ca. 840 Ma, rocks of the Marbat region of southern Oman that lie structurally to the west. The Ja’alan and Qalhat inliers thus document eastward increasing age and continental influence, consistent with progressive development of arc rocks onto the western margin of East Gondwana, although the location and nature of the eastern continental block remains elusive.

Place, publisher, year, edition, pages
2016. Vol. 58, no 16, 2046-2064 p.
National Category
Research subject
The changing Earth
URN: urn:nbn:se:nrm:diva-1915DOI: 10.1080/00206814.2016.1207207OAI: diva2:1048977
Sida - Swedish International Development Cooperation Agency, 2002-6967Swedish Research Council, 2009-4499
Available from: 2016-11-22 Created: 2016-11-22 Last updated: 2016-11-23Bibliographically approved

Open Access in DiVA

fulltext(8539 kB)18 downloads
File information
File name FULLTEXT01.pdfFile size 8539 kBChecksum SHA-512
Type fulltextMimetype application/pdf

Other links

Publisher's full text

Search in DiVA

By author/editor
Whitehouse, Martin J.
By organisation
Department of Geology
In the same journal
International Geology Review

Search outside of DiVA

GoogleGoogle Scholar
Total: 18 downloads
The number of downloads is the sum of all downloads of full texts. It may include eg previous versions that are now no longer available

Altmetric score

Total: 12 hits
ReferencesLink to record
Permanent link

Direct link