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dc.contributor.authorLi, X.
dc.contributor.authorLi, W.
dc.contributor.authorWang, Xuan-ce
dc.contributor.authorLi, Q.
dc.contributor.authorLiu, Y.
dc.contributor.authorTang, G.
dc.identifier.citationLi, Xian-hua and Li, Wu-xian and Wang, Xuan-ce and Li, Qiu-li and Liu, Yu and Tang, Guo-qiang. 2009. Role of mantle-derived magma in genesis of early Yanshanian granites in the Nanling Range, South China: in situ zircon Hf-O isotopic constraints. Science in China (Series D) 52 (9): pp. 1262-1278.

Although a number of petrographic observations and isotopic data suggest that magma mixing is common in genesis of many granite plutons, it is still controversial whether the mantle-derived mag-mas were involved in granites. We carried out in this study a systematic analysis of in situ zircon Hf-O isotopes for three early Yanshanian intrusions dated at ca. 160 Ma from the Nanling Range of Southeast China. The Qinghu monzonite has very homogeneous zircon Hf-O isotopic compositions, eHf(t) =11.60.3 and O=5.40.3. In combination with whole-rock geochemical and Sr-Nd isotopic data, the parental magma of the Qinghu monzonite were likely derived from the partial melting of re-cently-metasomatized, phlogopite-bearing lithospheric mantle without appreciable crustal contamina-tion. The Lisong and Fogang granites and the mafic microgranular enclaves (MME) within the Lisong granites have a wide range of zircon Hf-O isotopic compositions, with Hf and O isotopes being nega-tively correlated within each pluton. The Lisong MMEs were crystallized from a mantle-derived magma, similar to the parental magma of the Qinghu monzonite, with small amount of crustal assimilation. The Lisong and Fogang granites were formed by reworking of meta-sedimentary materials by man-tle-derived magmas and mixing of the mantle- and sediment-derived melts to varying degrees. It is thus concluded that these two Yanshanian granites in the Nanling Range were formed associated with growth and differentiation of continental crust.

dc.publisherScience China Press
dc.subjectHf-O isotopes
dc.titleRole of mantle-derived magma in genesis of early Yanshanian granites in the Nanling Range, South China: in situ zircon Hf-O isotopic constraints
dc.typeJournal Article
dcterms.source.titleScience in China (Series D)
curtin.accessStatusFulltext not available
curtin.facultyDepartment of Applied Geology
curtin.facultyFaculty of Science and Engineering
curtin.facultyWA School of Mines

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