Show simple item record

dc.contributor.authorLi, S.
dc.contributor.authorWilde, Simon
dc.contributor.authorWang, T.
dc.date.accessioned2017-01-30T14:14:08Z
dc.date.available2017-01-30T14:14:08Z
dc.date.created2014-03-11T20:00:55Z
dc.date.issued2013
dc.identifier.citationLi, Shan and Wilde, Simon A. and Wang, Tao. 2013. Early Permian post-collisional high-K granitoids from Liuyuan area in southern Beishan orogen, NW China: Petrogenesis and tectonic implications. Lithos. 179: pp. 99-119.
dc.identifier.urihttp://hdl.handle.net/20.500.11937/38234
dc.identifier.doi10.1016/j.lithos.2013.08.002
dc.description.abstract

Early Permian magmatism is one of the most important tectonothermal events in the Central Asian Orogenic Belt (CAOB). Early Permian granitic magmatism has been recognized from southern Beishan, NW China and they were emplaced between 275 Ma and 279 Ma according to LA-ICPMS zircon U–Pb dating. They are mainly metaluminous I-type and belong to the high-K calc-alkaline and shoshonitic series. The granitoids have calc-alkalic and alkali-calcic features. Their Sri values range from 0.7028 to 0.7047, εNd(t) values from − 2.5 to + 1.2 with Nd model ages (TDM) of 1.06–1.25 Ga, suggesting a mixed magma source of juvenile material with old continental crust. Furthermore, some granitoids have weak heterogeneous zircon εHf(t) values (− 1.7 to + 9.6) and Hf model ages (TDM2 = 0.84–1.57 Ga) that are also indicative of juvenile components with a small involvement of old continental crust. Based on geochemical and isotopic features, these high-K granitoids were derived from melting of heterogeneous crustal sources or through mixing of old continental crust with juvenile components and minor AFC (assimilation and fractional crystallization).The juvenile components probably originated from underplated basaltic magmas in response to asthenospheric upwelling. These Early Permian high-K calc-alkaline granitoids in the southern Beishan orogen were probably emplaced in a post-collisional extensional setting and suggest vertical continental crustal growth in the southern CAOB, which is the same or similar to most granitoids in CAOB. This study provides new evidence for determining the post-accretionary evolution of the southern CAOB.

dc.publisherElsevier BV
dc.subjectHigh-K granitoids
dc.subjectBeishan orogen
dc.subjectPetrogenesis
dc.subjectSouthern CAOB
dc.subjectEarly Permian
dc.subjectPost-collisional magmatism
dc.titleEarly Permian post-collisional high-K granitoids from Liuyuan area in southern Beishan orogen, NW China: Petrogenesis and tectonic implications
dc.typeJournal Article
dcterms.source.volume179
dcterms.source.startPage99
dcterms.source.endPage119
dcterms.source.issn0024-4937
dcterms.source.titleLithos
curtin.department
curtin.accessStatusFulltext not available


Files in this item

Thumbnail

This item appears in the following Collection(s)

Show simple item record