| U-Pb zircon ages, geochemical and Sr-Nd-Pb isotopic constraints on the dating and origin of intrusive complexes in the Sulu orogen, eastern China | |
Shen Liu ; Ruizhong Hu; Shan Gao; Caixia Feng; Hong Zhong; Youqiang Qi; Tao Wang; Guangying Feng; Yuhong Yang
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| 2011 | |
| 发表期刊 | intrusive complexes;foundering;underplating;Sulu belt;eastern China
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| 卷号 | 53期号:1页码:61-83 |
| 摘要 | TPost-orogenic intrusive complexes from the Sulu belt of eastern China consist of pyroxene monzonites and dioritic porphyrites. We report new U–Pb zircon ages, geochemical data, and Sr–Nd–Pb isotopic data for these rocks. Laser ablation-inductively coupled plasma-mass spectrometry U–Pb zircon analyses yielded a weighted mean 206Pb/238U age of 127.4 ± 1.2 Ma for dioritic porphyrites, consistent with crystallization ages (126 Ma) of the associated pyroxene monzonites. The intrusive complexes are characterized by enrichment in light rare earth elements and large ion lithophile elements (i.e. Rb, Ba, Pb, and Th) and depletion in heavy rare earth elements and high field strength elements (i.e. Nb, Ta, P, and Ti), high (87Sr/86Sr)i ranging from 0.7083 to 0.7093, low ϵNd(t) values from ϵ14.6 to − 19.2, 206Pb/204Pb = 16.65–17.18, 207Pb/204Pb = 15.33–15.54, and 208Pb/204Pb = 36.83–38.29. Results suggest that these intermediate plutons were derived from different sources. The primary magma-derived pyroxene monzonites resulted from partial melting of enriched mantle hybridized by melts of foundered lower crustal eclogitic materials before magma generation. In contrast, the parental magma of the dioritic porphyrites was derived from partial melting of mafic lower crust beneath the Wulian region induced by the underplating of basaltic magmas. The intrusive complexes may have been generated by subsequent fractionation of clinopyroxene, potassium feldspar, plagioclase, biotite, hornblende, ilmenite, and rutile. Neither was affected by crustal contamination. Combined with previous studies, these findings provide evidence that a Neoproterozoic batholith lies beneath the Wulian region. |
| 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/352002/7081 |
| 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 矿床地球化学国家重点实验室 |
| 推荐引用方式 GB/T 7714 | Shen Liu,Ruizhong Hu,Shan Gao,et al. U-Pb zircon ages, geochemical and Sr-Nd-Pb isotopic constraints on the dating and origin of intrusive complexes in the Sulu orogen, eastern China[J]. intrusive complexes;foundering;underplating;Sulu belt;eastern China,2011,53(1):61-83. |
| APA | Shen Liu.,Ruizhong Hu.,Shan Gao.,Caixia Feng.,Hong Zhong.,...&Yuhong Yang.(2011).U-Pb zircon ages, geochemical and Sr-Nd-Pb isotopic constraints on the dating and origin of intrusive complexes in the Sulu orogen, eastern China.intrusive complexes;foundering;underplating;Sulu belt;eastern China,53(1),61-83. |
| MLA | Shen Liu,et al."U-Pb zircon ages, geochemical and Sr-Nd-Pb isotopic constraints on the dating and origin of intrusive complexes in the Sulu orogen, eastern China".intrusive complexes;foundering;underplating;Sulu belt;eastern China 53.1(2011):61-83. |
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