Sm-Nd geochronology and petrography of garnet pyroxene granulites in the northern Sulu region of China and their geotectonic implication
文献类型：期刊论文
| 作者 | Zhai, MG; Gong, BL; Guo, JH; Liu, WJ; Li, YG; Wang, QC |
| 刊名 | LITHOS
 |
| 出版日期 | 2000-04-01 |
| 卷号 | 52期号:1-4页码:23-33 |
| 关键词 | granulites petrography Sm-Nd isochron Sulu region |
| ISSN号 | 0024-4937 |
| 文献子类 | Article |
| 英文摘要 | Abundant garnet-bearing granulite lenses are widely distributed in the northern part of the Sulu region and adjacent areas. They are possibly re-metamorphosed high-pressure metamorphic rocks. On the basis of detailed petrographic study, samples WD01, WD04 and ML06 from Laixi and Wendeng were identified as high-pressure granulites, and WHI from Weihai as an original coesite-bearing eclogite. Three high-pressure,granulite samples give mineral-WR isochron ages of 1846 +/- 76, 1743 +/- 79 and 1752 +/- 30 Ma. TDM ages are 3.3, 3.0 and 2.8 Ga. The Sm-Nd mineral-WR isochron ages are interpreted to date as the metamorphic resetting within the medium-pressure granulite facies, representing an isotopic re-homogeneity during uplifting of the high-pressure granulites from deep continent crust. It is important that Sm-Nd chronological characteristics are the same as Archaean high-pressure granulites in the North China craton. However, sample WH1 from Weihai demonstrates abnormal Sm-Nd characteristics. Its whole rock epsilon(Nd) (O) value is + 129. TDM age is 1.3 Ga, and constrains the minimum age of re-metamorphosed eclogite protolith formation to the mid-Proterozoic. This result is identical to those reported by Jahn (1994), showing complicated processes of metamorphism and metasomatism. The data in this paper provide further evidence to define the boundary between the North China craton and UHPM belt in eastern Shandong and to understand the: geotectonic nature of the boundary. (C) 2000 Elsevier Science B.V. All rights reserved. |
| WOS关键词 | FE ; MG ; GEOTHERMOMETER ; CALIBRATION ; BEARING |
| WOS研究方向 | Geochemistry & Geophysics ; Mineralogy |
| 语种 | 英语 |
| WOS记录号 | WOS:000086267700003 |
| 出版者 | ELSEVIER SCIENCE BV |
| 源URL | [http://ir.iggcas.ac.cn/handle/132A11/75872]  |
| 专题 | 中国科学院地质与地球物理研究所 |
| 通讯作者 | Zhai, MG |
| 作者单位 | Chinese Acad Sci, Inst Geol & Geophys, Beijing 100029, Peoples R China |
| 推荐引用方式 GB/T 7714 | Zhai, MG,Gong, BL,Guo, JH,et al. Sm-Nd geochronology and petrography of garnet pyroxene granulites in the northern Sulu region of China and their geotectonic implication[J]. LITHOS,2000,52(1-4):23-33. |
| APA | Zhai, MG,Gong, BL,Guo, JH,Liu, WJ,Li, YG,&Wang, QC.(2000).Sm-Nd geochronology and petrography of garnet pyroxene granulites in the northern Sulu region of China and their geotectonic implication.LITHOS,52(1-4),23-33. |
| MLA | Zhai, MG,et al."Sm-Nd geochronology and petrography of garnet pyroxene granulites in the northern Sulu region of China and their geotectonic implication".LITHOS 52.1-4(2000):23-33. |
入库方式： OAI收割
来源：地质与地球物理研究所
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