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dc.contributor.authorSajid, M
dc.contributor.authorAndersen, J
dc.contributor.authorRocholl, A
dc.contributor.authorWiedenbeck, M
dc.date.accessioned2018-10-01T15:12:16Z
dc.date.issued2018-08-27
dc.description.abstractThe pre-Himalayan peraluminous magmatic event along the northern margin of Indian plate in north-western Pakistan has been investigated leading to a correlation with the magmatic evolution in other Himalayan and northern Gondwana regions. The two mica granites from Utla and Mansehra regions of NW Pakistan are dominantly megacrystic, strongly peraluminous (A/CNK > 1.1) and intruded by aplitic dykes and quartz rich veins. U-Pb zircon dating by SIMS reveals their emplacement during the early Paleozoic, ranging from 476 Ma to 480 Ma. These granites are enriched in light rare-earth elements (LREEs) and show similar REE patterns with negative Eu anomalies. Geochemical modelling indicates that these granites were derived mainly from the partial melting of pelitic sources followed by the evolution of melt via fractional crystallization of feldspars, biotite, muscovite, apatite, and/or zircon, with the aplite dykes representing the very last fractionation product. Based on their compositions, source rock characteristics and U-Pb geochronology, we assign these to the regional association of other Cambro-Ordovician granitoids from the Himalayas and northern Gondwana terranes. Due to these similarities alongside other metamorphic, stratigraphic and geochemical evidence, an early Paleozoic Andean-type orogenic event is proposed for the genesis of these granitoids where the process could have been initiated by the subduction of the Proto-Tethys oceanic lithosphere beneath the northern Gondwana continental margin.en_GB
dc.description.sponsorshipThe principal author acknowledges the financial assistance provided by the Commonwealth Scholarship Commission, United Kingdom.en_GB
dc.identifier.citationVol. 318-319, pp. 340 - 356en_GB
dc.identifier.doi10.1016/j.lithos.2018.08.024
dc.identifier.urihttp://hdl.handle.net/10871/34167
dc.language.isoenen_GB
dc.publisherElsevieren_GB
dc.rights.embargoreasonUnder embargo until 27 August 2019 in compliance with publisher policyen_GB
dc.rights© 2018 Elsevier B.V. All rights reserved.en_GB
dc.subjectU-Pb Geochronologyen_GB
dc.subjectGeochemistryen_GB
dc.subjectEarly Paleozoic Utla granitesen_GB
dc.subjectAndean-type orogenyen_GB
dc.subjectNorthern Indian plateen_GB
dc.subjectNW Pakistanen_GB
dc.titleU-Pb geochronology and petrogenesis of peraluminous granitoids from northern Indian plate in NW Pakistan: Andean type orogenic signatures from the early Paleozoic along the northern Gondwanaen_GB
dc.typeArticleen_GB
dc.identifier.issn0024-4937
dc.descriptionThis is the author accepted manuscript. The final version is available from Elsevier via the DOI in this recorden_GB
dc.identifier.journalLithosen_GB


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