Show simple item record

dc.contributor.authorDan, W.
dc.contributor.authorLi, X.
dc.contributor.authorWang, Q.
dc.contributor.authorWang, Xuan-Ce
dc.contributor.authorLiu, Y.
dc.contributor.authorWyman, D.
dc.identifier.citationDan, W. and Li, X. and Wang, Q. and Wang, X. and Liu, Y. and Wyman, D. 2014. Paleoproterozoic S-type granites in the Helanshan Complex, Khondalite Belt, North China Craton: Implications for rapid sediment recycling during slab break-off. Precambrian Research. 254: pp. 59-72.

S-type granites, typically derived from the rapid recycling of sedimentary rocks, are sometimes accompanied by contemporary mafic magmatism and granulite metamorphism. However, the geodynamic context for such rock suites is often highly disputed, with various model proposed, including back-arc basin opening, lithospheric delamination, mantle plume and continental rifting. The Paleoproterozoic Khondalite Belt in the North China Craton provides an example of synchronous mafic and felsic magmatism that was accompanied by granulite-facies metamorphic events for which the tectonic affinities of these rocks remains unclear. This study integrates in situ zircon Hf–O isotope analyses, whole-rock geochemistry and Nd isotope results for the earliest two-mica granites (ca. 1.95 Ga) in order to provide constraints on the above issues. The granites are strongly peraluminous (A/CNK value >1.1), and characterized by high zircon δ18O values of 7.3–10.6‰, corresponding to calculated magmatic δ18O values of 9.1–12.3‰, similar to those of typical S-type granites. They have relatively high and homogeneous ɛNd(t) values of −1.1 to +0.9 and highly variable zircon ɛHf(t) values ranging from −1.0 to +8.3. In situ zircon Hf–O isotopic compositions indicate that the S-type granites may contain some mantle or juvenile crustal components in addition to a sediment component. Based on the new results and published data, a slab break-off model is proposed to explain the rapid recycling of sedimentary precursors and the generation of the ca. 1.95 Ga S-type granites.

dc.publisherElsevier BV
dc.subjectZircon Hf–O isotopes
dc.subjectS-type granite
dc.subjectNorth China Craton
dc.subjectSlab break-off
dc.titlePaleoproterozoic S-type granites in the Helanshan Complex, Khondalite Belt, North China Craton: Implications for rapid sediment recycling during slab break-off
dc.typeJournal Article
dcterms.source.titlePrecambrian Research
curtin.departmentDepartment of Applied Geology
curtin.accessStatusOpen access

Files in this item


This item appears in the following Collection(s)

Show simple item record