Zircon-titanite-rutile U-Pb system from metamorphic rocks of Jungshan "Group" in Korea: Implications of tectono-thermal events from Paleoproterozoic to Mesozoic
文献类型：期刊论文
| 作者 | Li QiuLi1; Zhao Lei1; Zhang YanBin1; Yang JongHyok2; Kim JongNam2; Han RyongHyon2 |
| 刊名 | ACTA PETROLOGICA SINICA
 |
| 出版日期 | 2016 |
| 卷号 | 32期号:10页码:3019-3032 |
| 关键词 | Korea Jungshan "Group" Zircon Titanite Rutile |
| 文献子类 | Article |
| 英文摘要 | The Jungshan 'Group' (Complex) in the Korean Peninsula is mainly composed of garnet mica gneiss, garnet amphibolite and some marble. Its protolith rocks are pelite-dominated elastic rocks with a few volcanic and carbonates, which were metamorphosed to amphibolite to granulite facies. In this paper, we present our results on the U-Pb system of zircon, titanite and rutile from two pelitic gneissic samples and one garnet amphibolite sample from the Jungshan Group. Zircons form the two garnet mica gneissic samples are of typical metamorphic zircons with average age of 1850 +/- 5Ma. No zircon cores were identified from the zircons analyzed, indicating that zircons must have been scarce in the protolith of the pelitic gneiss. Two different groups of titanite grains can be identified from the garnet amphibolite based on their petrogenesis and they are the early stage and the late stage titanite grains. Early stage titanite grains were formed at amphibolite to granulite facies and they are characterized by high U contents and high Th/U ratios. Their U-Pb ages plot on a well-defined discordia whose upper intercept age is 1831 +/- 5Ma and lower intercept age is 155 +/- 3Ma. The former age represents the time at which the temperature of the rock reduced close to the closure temperature of titanite while the latter represents time of the Mesozoic tectonothermal event disturbance. The late stage titanite grains are characterized by low U contents and low Th/U ratios. These titanite grains give one age of 153 +/- 3Ma which also represents time of the Mesozoic tectonothermal disturbance. Rutile grains from the two different rocks preserved little early geochronological information while most of their U-Pb systems were reset at similar to 155 Ma. However, the U-Pb system of rutile was not closed until similar to 110Ma. The similar to 110Ma age is probably closely related to the widespread emplacement of similar to 110Ma granites in vicinity. The data indicate that the Jungshan Complex experienced high-grade metamorphosm prior to/close to similar to 1850Ma and exhumed since ca. 1850 similar to 1830Ma and thus became the provenance, as well as the basement of the Meso-Neoproterozoic strata. The Jungshan Complex also recorded the extensive igneous-thermal events during Meoszoic. |
| WOS关键词 | NORTH CHINA CRATON ; O ISOTOPES ; WORKING REFERENCE ; COOLING HISTORY ; 2 EPISODES ; HF ; GEOCHRONOLOGY ; AGE ; DIFFUSION ; GARNET |
| WOS研究方向 | Geology |
| 语种 | 英语 |
| WOS记录号 | WOS:000388277000008 |
| 源URL | [http://ir.iggcas.ac.cn/handle/132A11/53244]  |
| 专题 | 地质与地球物理研究所_岩石圈演化国家重点实验室 |
| 作者单位 | 1.Chinese Acad Sci, Inst Geol & Geophys, State Key Lab Lithospher Evolut, Beijing 100029, Peoples R China 2.State Acad Sci, Inst Geol, Pyongyang 3812100, North Korea |
| 推荐引用方式 GB/T 7714 | Li QiuLi,Zhao Lei,Zhang YanBin,et al. Zircon-titanite-rutile U-Pb system from metamorphic rocks of Jungshan "Group" in Korea: Implications of tectono-thermal events from Paleoproterozoic to Mesozoic[J]. ACTA PETROLOGICA SINICA,2016,32(10):3019-3032. |
| APA | Li QiuLi,Zhao Lei,Zhang YanBin,Yang JongHyok,Kim JongNam,&Han RyongHyon.(2016).Zircon-titanite-rutile U-Pb system from metamorphic rocks of Jungshan "Group" in Korea: Implications of tectono-thermal events from Paleoproterozoic to Mesozoic.ACTA PETROLOGICA SINICA,32(10),3019-3032. |
| MLA | Li QiuLi,et al."Zircon-titanite-rutile U-Pb system from metamorphic rocks of Jungshan "Group" in Korea: Implications of tectono-thermal events from Paleoproterozoic to Mesozoic".ACTA PETROLOGICA SINICA 32.10(2016):3019-3032. |
入库方式： OAI收割
来源：地质与地球物理研究所
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