Show simple item record

dc.contributor.authorSarma, D.
dc.contributor.authorMcNaughton, Neal
dc.contributor.authorBelusova, E.
dc.contributor.authorMohan, M.
dc.contributor.authorFletcher, I.
dc.date.accessioned2017-01-30T12:37:20Z
dc.date.available2017-01-30T12:37:20Z
dc.date.created2013-03-04T20:00:55Z
dc.date.issued2012
dc.identifier.citationSarma, D. Srinivasa and McNaughton, Neal and Belusova, Elena and Mohan, M. Ram and Fletcher, Ian. 2012. Detrital zircon U–Pb ages and Hf-isotope systematics from the Gadag Greenstone Belt: Archean crustal growth in the western Dharwar Craton, India. Gondwana Research. 22 (3-4): pp. 843-854.
dc.identifier.urihttp://hdl.handle.net/20.500.11937/23441
dc.identifier.doi10.1016/j.gr.2012.04.001
dc.description.abstract

The Western Dharwar Craton in peninsular India comprises a typical Meso- to Neo-Archean granite-greenstone terrain. Detrital zircons from two metagreywackes in a late basin from the Gadag Greenstone Belt preserve at least eight age populations ranging in age from ca 3.34 to 2.55 Ga, and grains as old as ca 3.54 Ga. The zircon provenances for the two samples appear to be the same up to ca 3.25 Ga, with relatively juvenile eHf values largely between zero and depleted mantle values. After 3.25 Ga, one sample has similar eHf values whereas the other has only negative values indicative of Hf-evolution in a crustal environment. After ca 3.25 Ga the source regions for the two samples were distinctly different.The detrital zircons reflect the age and evolution of the upper crust of the Western Dharwar Craton. Modeling of Hf isotopic evolution of the detrital zircons suggests two major crust-forming events at ca. 3.6 and 3.36 Ga, and some indication of juvenile addition to the crust at ca 2.6 Ga. The maximum sedimentation age of the greywackes is constrained by the youngest detrital zircon population at 2547 ± 5 Ma. Gold mineralization in the belt is dated at 2522 ± 6 Ma and constrains greywacke sedimentation, deformation and metamorphism to a ca 25 my interval.

dc.publisherElsevier Science BV
dc.subjectSHRIMP
dc.subjectU–Pb
dc.subjectDharwar Craton
dc.subjectGreenstone belt
dc.subjectHf isotopes
dc.subjectDetrital zircons
dc.titleDetrital zircon U–Pb ages and Hf-isotope systematics from the Gadag Greenstone Belt: Archean crustal growth in the western Dharwar Craton, India
dc.typeJournal Article
dcterms.source.volume22
dcterms.source.startPage843
dcterms.source.endPage854
dcterms.source.issn1342-937X
dcterms.source.titleGondwana Research
curtin.department
curtin.accessStatusFulltext not available


Files in this item

Thumbnail

This item appears in the following Collection(s)

Show simple item record