Petrogenesis of adamellites from eastern Shandong Province: geochronological, geochemical, and Sr–Nd–Pb isotopic evidence

	Petrogenesis of adamellites from eastern Shandong Province: geochronological, geochemical, and Sr–Nd–Pb isotopic evidence
	Tao Wang; Shen Liu; Jiaxi Zhou; Yubin Li
	2013
发表期刊	International Geology Review
卷号	55 期号:14 页码:1786-1800
其他摘要	Geochronology, geochemistry, and whole-rock Sr–Nd–Pb isotopes were studied on a suite of Mesozoic adamellites from eastern China to characterize their ages and petrogenesis. Sensitive high-resolution ion microprobe U–Pb zircon analyses were done, yielding consistent ages of 123.2 ± 1.8 to 122.1 ± 2.1 Ma for the samples. These rocks belong to the alkaline magma series in terms of K2O + Na2O contents (8.45–9.58 wt.%) and to the shoshonitic series based on their high K2O contents (5.23–5.79 wt.%). The adamellites are further characterized by high light rare earth element contents [(La/Yb)N = 14.96–45.99]; negative Eu anomalies (δEu = 0.46–0.75); positive anomalies in Rb, Th, Pb, and U; and negative anomalies in Sr, Ba, and high field-strength elements (i.e. Nb, Ta, P, and Ti). In addition, all of the adamellites in this study display relatively low radiogenic Sr [(87Sr/86Sr)i = 0.7081–0.7089] and negative ϵNd(t) values from –16.70 to –17.80. These results suggest that the adamellites were derived from low-degree partial melting of an enriched lithospheric mantle below the North China Craton (NCC). The parent magmas likely experienced fractional crystallization of potassium feldspar, plagioclase and Fe–Ti oxides (e.g. rutile, ilmenite, and titanite), apatite, and zircon during the ascent of alkaline rocks without crustal contamination.
关键词	Alkaline Intrusions Enriched Lithospheric Mantle Crustal Foundering Granite Petrogenesis Eastern Shandong Province
学科领域	矿床地球化学
收录类别	SCI
语种	英语
文献类型	期刊论文
条目标识符	http://ir.gyig.ac.cn/handle/352002/5031
专题	矿床地球化学国家重点实验室_矿床地球化学国家重点实验室_期刊论文
推荐引用方式 GB/T 7714	Tao Wang,Shen Liu,Jiaxi Zhou,等. Petrogenesis of adamellites from eastern Shandong Province: geochronological, geochemical, and Sr–Nd–Pb isotopic evidence[J]. International Geology Review,2013,55(14):1786-1800.
APA	Tao Wang,Shen Liu,Jiaxi Zhou,&Yubin Li.(2013).Petrogenesis of adamellites from eastern Shandong Province: geochronological, geochemical, and Sr–Nd–Pb isotopic evidence.International Geology Review,55(14),1786-1800.
MLA	Tao Wang,et al."Petrogenesis of adamellites from eastern Shandong Province: geochronological, geochemical, and Sr–Nd–Pb isotopic evidence".International Geology Review 55.14(2013):1786-1800.

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