中国科学院机构知识库网格
Chinese Academy of Sciences Institutional Repositories Grid
Geochronology and geochemistry of muscovite granite in Sunwu area, NE China: Implications for the timing of closure of the Mongol-Okhotsk Ocean

文献类型:期刊论文

作者Li Yu1; Ding LeiLei2; Xu Wenliang1; Wang Feng1; Tang Jie1; Zhao Shuo1; Wang ZiJin1
刊名ACTA PETROLOGICA SINICA
出版日期2015
卷号31期号:1页码:56-66
关键词Sunwu area Middle Jurassic Muscovite granite Geochronology Geochemistry Closure timing of the Mongol-Okhotsk Ocean
ISSN号1000-0569
文献子类Article
英文摘要Zircon U-Pb dating and whole-rock geochemical analyses are undertaken for the muscovite granite in Sunwu area, NE China, with the aim of constraining its formation time, petrogenesis and the regional tectonic setting. Zircons from the muscovite granite in the study area are euhedral-subhedral in shape, and display fine-scale oscillatory growth zoning, indicating a magmatic origin. LA-ICP-MS zircon U-Pb dating indicates that the muscovite granite formed in the Middle Jurassic (similar to 168Ma). The muscovite granites have SiO2 = 74.61% similar to 80.16%, Al2O3 = 10.59% similar to 13.90%, Fe2O3 = 0.11% similar to 0.30%, and belong chemically to metaluminous-peraluminous series (A/CNK = 0.97 similar to 1.13). In addition, these muscovite granites are enriched in light rare earth elements (LREEs) and large ion lithophile elements (LILEs), and depleted in heavy rare earth elements (HREEs) and high field strength elements (HFSEs). The epsilon(Hf)(t) values and t(DM2) of zircons range from + 7.53 to + 11.66 and from 595Ma to 966Ma, respectively, indicating that the primary magma was derived from partial melting of a juvenile thickened lower crust. Combined with the metamorphic complexes in the conjunction of the Great and Lesser Xing' an Ranges and the regional stratigraphic unconformity in western Liaoning and northern Hebei provinces, it is suggested that a significant collisional and thrusting event took place during Middle Jurassic, implying the closure of the Mongol-Okhotsk Ocean. Taken together, we conclude that the muscovite granite in the study area formed in a compressing collisional setting, which is related to the closure of the Mongol-Okhotsk Ocean instead of the subduction of the Paleo-Pacific oceanic plate beneath the Eurasian continent.
WOS关键词MESOZOIC VOLCANIC-ROCKS ; GREAT XINGAN RANGE ; U-PB GEOCHRONOLOGY ; EASTERN HEILONGJIANG PROVINCE ; HF ISOTOPIC COMPOSITIONS ; ASIAN OROGENIC BELT ; LA-ICP-MS ; NORTH CHINA ; TECTONIC IMPLICATIONS ; ZHANGGUANGCAI RANGE
WOS研究方向Geology
语种英语
WOS记录号WOS:000349509300004
出版者SCIENCE PRESS
源URL[http://ir.iggcas.ac.cn/handle/132A11/86858]  
专题中国科学院地质与地球物理研究所
通讯作者Li Yu
作者单位1.Jilin Univ, Coll Earth Sci, Changchun 130061, Peoples R China
2.Chinese Acad Sci, Inst Geol & Geophys, Beijing 100029, Peoples R China
推荐引用方式
GB/T 7714
Li Yu,Ding LeiLei,Xu Wenliang,et al. Geochronology and geochemistry of muscovite granite in Sunwu area, NE China: Implications for the timing of closure of the Mongol-Okhotsk Ocean[J]. ACTA PETROLOGICA SINICA,2015,31(1):56-66.
APA Li Yu.,Ding LeiLei.,Xu Wenliang.,Wang Feng.,Tang Jie.,...&Wang ZiJin.(2015).Geochronology and geochemistry of muscovite granite in Sunwu area, NE China: Implications for the timing of closure of the Mongol-Okhotsk Ocean.ACTA PETROLOGICA SINICA,31(1),56-66.
MLA Li Yu,et al."Geochronology and geochemistry of muscovite granite in Sunwu area, NE China: Implications for the timing of closure of the Mongol-Okhotsk Ocean".ACTA PETROLOGICA SINICA 31.1(2015):56-66.

入库方式: OAI收割

来源:地质与地球物理研究所

浏览0
下载0
收藏0
其他版本

除非特别说明,本系统中所有内容都受版权保护,并保留所有权利。