U-Pb Geochronology, Elemental and Sr-Nd Isotopic Geochemistry of the Houyaoyu Granite Porphyries: Implication for the Genesis of Early Cretaceous Felsic Intrusions in East Qinling | |
Xiaohu He; Hong Zhong; Zhifang Zhao; Shucheng Tan; Weiguang Zhu; Siqi Yang; Wenjun Hu; Zhong Tang; Congfa Bao | |
2018 | |
发表期刊 | Journal of Earth Science
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卷号 | 29期号:4页码:920-938 |
摘要 | The Early Cretaceous Houyaoyu granite porphyries are located in the south margin of the North China Craton. Field observations, petrography, geochronology, major and trace elemental and Sr-Nd isotopic compositions are reported to elucidate the genesis of the Houyaoyu granite porphyries. SIMS zircon U-Pb analyses for the Houyaoyu granite porphyries yield two concordant ages of 133.2 +/- 2.3 (2 sigma) and 131 +/- 1.1 (2 sigma) Ma, respectively. Major and trace elemental compositions indicate that these porphyries are high-K I-type granites with high contents of SiO2, K2O, Rb, U, Pb, low Nb, Ta, Ti, and P. Initial Sr-87/Sr-86 ratios range from 0.708 3 to 0.709 7, and epsilon (Nd)(t) values range from -9.13 to -12.3, with corresponding two-stage depleted-mantle Nd model ages (T (2DM)) varying from 1.57 to 1.91 Ga. This suggests that the Houyaoyu granite porphyries were predominantly derived from ancient lower continental crust, with minor involvement of mantle-derived components. On the basis of the tectonic evolution of the Qinling Orogen and geochemical characteristics of the Houyaoyu granite porphyries, it is proposed that they were formed in an extensional tectonic setting related to lithospheric destruction of the North China Craton, and produced Mo and Pb-Zn mineralization in East Qinling Orogen. |
关键词 | East Qinling Granite Porphyries Ancient Lower Continental Crust Destruction Of North China Craton |
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/42920512-1/8845 |
专题 | 矿床地球化学国家重点实验室 |
作者单位 | 1.Department of Geology, School of Resource Environment and Earth Science, Yunnan University, Kunming, 650091, China 2.State Key Laboratory of Ore Deposit Geochemistry, Institute of Geochemistry, Chinese Academy of Sciences, Guiyang, 550081, China 3.University of Chinese Academy of Sciences, Beijing, 100049, China 4.Kunming University of Science and Technology, Kunming, 650093, China;eInstitute of Yunnan Geology Survey, Kunming, 650051, China |
推荐引用方式 GB/T 7714 | Xiaohu He;Hong Zhong;Zhifang Zhao;Shucheng Tan;Weiguang Zhu;Siqi Yang;Wenjun Hu;Zhong Tang;Congfa Bao. U-Pb Geochronology, Elemental and Sr-Nd Isotopic Geochemistry of the Houyaoyu Granite Porphyries: Implication for the Genesis of Early Cretaceous Felsic Intrusions in East Qinling[J]. Journal of Earth Science,2018,29(4):920-938. |
APA | Xiaohu He;Hong Zhong;Zhifang Zhao;Shucheng Tan;Weiguang Zhu;Siqi Yang;Wenjun Hu;Zhong Tang;Congfa Bao.(2018).U-Pb Geochronology, Elemental and Sr-Nd Isotopic Geochemistry of the Houyaoyu Granite Porphyries: Implication for the Genesis of Early Cretaceous Felsic Intrusions in East Qinling.Journal of Earth Science,29(4),920-938. |
MLA | Xiaohu He;Hong Zhong;Zhifang Zhao;Shucheng Tan;Weiguang Zhu;Siqi Yang;Wenjun Hu;Zhong Tang;Congfa Bao."U-Pb Geochronology, Elemental and Sr-Nd Isotopic Geochemistry of the Houyaoyu Granite Porphyries: Implication for the Genesis of Early Cretaceous Felsic Intrusions in East Qinling".Journal of Earth Science 29.4(2018):920-938. |
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