Academic Journal
Evolution of the Yunkai Terrane, South China: Evidence from SHRIMP zircon U-Pb dating, geochemistry and Nd isotope
| العنوان: | Evolution of the Yunkai Terrane, South China: Evidence from SHRIMP zircon U-Pb dating, geochemistry and Nd isotope |
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| المؤلفون: | Wan, Yusheng, Liu, Dunyi, Wilde, Simon A., Cao, Jianjin, Chen, Bin, Dong, Chunyan, Song, Biao, Du, Lilin |
| المساهمون: | Wan, YS (reprint author), Chinese Acad Geol Sci, Inst Geol, 26 Baiwanzhuang, Beijing 100037, Peoples R China., Chinese Acad Geol Sci, Inst Geol, Beijing 100037, Peoples R China., Beijing SHRIMP Ctr, Beijing 100037, Peoples R China., Curtin Univ Technol, Dept Appl Geol, Perth, WA 6845, Australia., Sun Yat Sen Univ, Dept Earth Sci, Guangzhou 510275, Guangdong, Peoples R China., Peking Univ, Beijing 100871, Peoples R China., Chinese Acad Geol Sci, Inst Geol, 26 Baiwanzhuang, Beijing 100037, Peoples R China. |
| المصدر: | SCI |
| بيانات النشر: | journal of asian earth sciences |
| سنة النشر: | 2010 |
| المجموعة: | Peking University Institutional Repository (PKU IR) / 北京大学机构知识库 |
| مصطلحات موضوعية: | Yunkai area, South China, SHRIMP U-Pb zircon dating, Nd isotopes, Palaeozoic (Caledonian) orogen, Basement granitoids, CATHAYSIA BLOCK, SINGLE ZIRCON, CORE COMPLEX, GEOCHRONOLOGY, ROCKS, METAMORPHISM, COLLISION, GRANITE, CRUST, AGES |
| الوصف: | The Yunkai Terrane is one of the most important pre-Devonian areas of metamorphosed supracrustal and granitic basement rocks in the Cathaysia Block of South China. The supracrustal rocks are mainly schist, slate and phyllite, with local paragneiss, granulite, amphibolite and marble, with metamorphic grades ranging from greenschist to granulite facies. Largely on the basis of metamorphic grade, they were previously divided into the Palaeo- to Mesoproterozoic Gaozhou Complex, the early Neoproterozoic Yunkai 'Group' and early Palaeozoic sediments. Granitic rocks were considered to be Meso- and Neoproterozoic, or early Palaeozoic in age. In this study, four meta-sedimentary rock samples, two each from the Yunkai 'Group' and Gaozhou Complex, together with three granite samples, record metamorphic and magmatic zircon ages of 443-430 Ma (Silurian), with many inherited and detrital zircons with the ages mainly ranging from 1.1 to 0.8 Ga, although zircons with Archaean and Palaeoproterozoic ages have also been identified in several of the samples. A high-grade sillimanite-garnet-cordierite gneiss contains similar to 242 Ma metamorphic zircons, as well as similar to 440 Ma ones. Three of the meta-sedimentary rocks show large variations in major element compositions, but have similar REE patterns, and have t(DM) model ages of 2.17-1.91 Ga and epsilon(Nd) (440 Ma) values of -13.4 to -10.0. Granites range in composition from monzogranite to syenogranite and record t(DM) model ages of 2.13-1.42 Ga and epsilon(Nd) (440 Ma) values of -8.4 to -1.2. It is concluded that the Yunkai 'Group' and Gaozhou Complex formed coevally in the late Neoproterozoic to early Palaeozoic, probably at the same time as weakly to un-metamorphosed early Palaeozoic sediments in the area. Based on the detrital zircon population, the source area contained Meso- to Neoproterozoic rocks, with some Archaean material. Palaeozoic tectonothermal events and zircon growth in the Yunkai Terrane can be correlated with events of similar age and character known ... |
| نوع الوثيقة: | journal/newspaper |
| اللغة: | English |
| تدمد: | 1367-9120 |
| Relation: | JOURNAL OF ASIAN EARTH SCIENCES.2010,37,(2),140-153.; 936331; http://hdl.handle.net/20.500.11897/245531; WOS:000271837200004 |
| DOI: | 10.1016/j.jseaes.2009.08.002 |
| الاتاحة: | https://hdl.handle.net/20.500.11897/245531 https://doi.org/10.1016/j.jseaes.2009.08.002 |
| رقم الانضمام: | edsbas.A29754BA |
| قاعدة البيانات: | BASE |
| تدمد: | 13679120 |
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| DOI: | 10.1016/j.jseaes.2009.08.002 |