Petrogenesis and tectonic setting of the Wulong two-mica monzogranite on Liaodong Peninsula, NE China: Constraints from zircon U-Pb and Hf-O isotopic data
作者: Yongbin WangBing YuQingdong ZengWeikang GuoJinhui YangQingren Meng
作者单位: 1Key Laboratory of Mineral Resources, Institute of Geology and Geophysics, Chinese Academy of Sciences
2Department of Earth Sciences, Aarhus University
3College of Earth Science, University of Chinese Academy of Sciences
4State Key Laboratory of Lithospheric Evolution, Institute of Geology and Geophysics, Chinese Academy of Sciences
刊名: GEOCHEMICAL JOURNAL, 2019, Vol.53 (4), pp.261-279
来源数据库: J-STAGE Journals
DOI: 10.2343/geochemj.2.0564
关键词: Zircon U-Pb ageElement geochemistryHf-O isotopic compositionLiaodong PeninsulaNorth China Craton
原始语种摘要: The petrogenesis and tectonic setting of Middle-Late Jurassic granitoids on Liaodong Peninsula, NE China, are debated. To resolve these uncertainties, this study analyzed geochemistry, zircon U-Pb ages and Hf-O isotopic compositions of the Wulong two-mica monzogranite on the Liaodong peninsula. Zircon U-Pb ages indicate that the Wulong monzogranite was intruded at ca. 168–162 Ma, and included an inherited population of Paleoproterozoic zircon grains (ca. 2.5–2.0 Ga). Wulong monzogranite is characterized by quartz, plagioclase, K-feldspar and minor muscovite and biotite. This S-type granitic intrusion has high SiO2 (>70 wt.%) contents, is high-K calc-alkaline, shows high zircon δ18O values (>7.5‰), and is weakly peraluminous (A/CNK = 1.01–1.08). The relatively low Sm/Nd (0.13–0.21), Rb/Sr...
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  • zircon 锆石
  • isotopic 同位素置换
  • tectonic 构造的
  • setting 浓缩
  • plagioclase 斜长石
  • biotite 黑云母
  • ratios 遗传比率
  • geochemistry 地球化学
  • muscovite 白云母
  • subduction 俯冲