Please use this identifier to cite or link to this item: https://hdl.handle.net/1959.11/28735
Title: Early Cretaceous granitic rocks from the southern Jiaodong Peninsula, eastern China: implications for lithospheric extension
Contributor(s): Yan, Quanshu (author); Metcalfe, Ian  (author)orcid ; Shi, Xuefa (author); Zhang, Pingyang (author); Li, Fengchun (author)
Publication Date: 2019
DOI: 10.1080/00206814.2018.1474388
Handle Link: https://hdl.handle.net/1959.11/28735
Abstract: Zircon U-Pb ages, major element and trace element compositions, and Sr, Nd, and Pb isotopic compositions for late Mesozoic granites from the southern Jiaodong Peninsula (eastern China) were determined. Ages for the Wulianshan, Xiaozhushan, and Dazhushan plutons are 119.1-122.3, 114.2, and 108.9 Ma, respectively. Major and trace element characteristics show that these granitic rocks belong to alkaline, A-type granites formed in an extensional setting. Trace element compositions show strong, variable negative anomalies in Ba, K, P and Ti, and positive anomalies in Rb, Th, U, Pb, Ce, Zr, and Hf, which are typical characteristics of A-type granites. Variable Sr and Nd isotopic compositions, 87Sr/86Sr(i) = 0.70540-0.7071 and εNd(t) = -14.5 to -20.9. Whole-rock Pb isotopic compositions have the following ranges, (206Pb/204Pb)t = 15.707-16.561, (207Pb/204Pb)t = 15.376-16.462, and (208Pb/204Pb)t = 36.324 to 37.064. Isotopic modelling indicates an origin that lies between mantle tapped by Cenozoic basalts around the Tan-Lu megafault and lower continental crust (LCC), and which can be explained by mixing of 11-18% mantle and 82-89% LCC. Based on new and compiled data, we suggest that the southern Jiaodong Peninsula, as well as the Laoshan area, was in a regional extensional setting of an orogenic belt during 106-126 Ma. The granitic rocks may be the result of late Mesozoic lithospheric thinning and decratonization (i.e. late Mesozoic craton destruction event occurring throughout eastern China).
Publication Type: Journal Article
Source of Publication: International Geology Review, 61(7), p. 821-838
Publisher: Taylor & Francis Inc
Place of Publication: United States of America
ISSN: 1938-2839
0020-6814
Fields of Research (FoR) 2008: 040202 Inorganic Geochemistry
040313 Tectonics
040203 Isotope Geochemistry
Fields of Research (FoR) 2020: 370302 Inorganic geochemistry
370303 Isotope geochemistry
Socio-Economic Objective (SEO) 2008: 849999 Mineral Resources (excl. Energy Resources) not elsewhere classified
Socio-Economic Objective (SEO) 2020: 259999 Other mineral resources (excl. energy resources) not elsewhere classified
Peer Reviewed: Yes
HERDC Category Description: C1 Refereed Article in a Scholarly Journal
Appears in Collections:Journal Article
School of Environmental and Rural Science

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