Genesis and Ar-40-Ar-39 dating of clinopyroxene megacrysts in ultramafic terrain from Songshugou, east Qinling Mountain and its geological implication.
文献类型：期刊论文
| 作者 | Chen, DL; Liu, L; Zhou, DW; Luo, JH; Sang, HQ |
| 刊名 | ACTA PETROLOGICA SINICA
 |
| 出版日期 | 2002-07-01 |
| 卷号 | 18期号:3页码:355-362 |
| 关键词 | pyroxene megacryst Ar-40-Ar-39 age Songshugou eastern Qinling |
| ISSN号 | 1000-0569 |
| 文献子类 | Article |
| 英文摘要 | Based on the systematic electron microprobe analyses and the compared research with the clinopyroxene megacrysts in mantle rock inclusions and the clinopyroxene in high pressure - ultrahigh pressure metamorphic ultramafic rocks, the pyroxene megacrysts, occurred in ultramafic terrane from Songshugou, eastern Qinling, show the features of metamorphic genesis pyroxene. Ar-40-Ar-39 dating with the high K2O sample gets the high temperature panel age of 833.8+/-4.3 Ma, isochron age of 848.2+/-4.3Ma. Considering the closed temperature of pyroxene(600degreesC) is obviously lower than that of the deformation and metamorphism of Songshugou ultramafic terrane at primarily (greater than or equal to800degreesC), but is very close to the temperature of deformation and metamorphism in amphibolite faces at late stage (less than or equal to750degreesC), the panel age of 833.8+/-2.3Ma doesn't represent the forming age of the pyroxene megacrysts at peak metamorphism, it may be the lifting and cooling age of high-pressure metamorphic rocks after subduction and collision. Within the error range, the age of pyroxene megacrysts. is generally coherent with the metamorphism age (983+/-140Ma) obtained from the metamorphites in ophiolite. These indicate that the pieces of Songshugou ophiolite once as a whole underwent subduction downward to the low crust, experienced the high-pressure metamorphism at this level, and then uplifted. |
| WOS关键词 | GARNET PERIDOTITES ; ORIGIN ; CHINA |
| WOS研究方向 | Geology |
| 语种 | 英语 |
| WOS记录号 | WOS:000177516200010 |
| 出版者 | SCIENCE CHINA PRESS |
| 源URL | [http://ir.iggcas.ac.cn/handle/132A11/77687]  |
| 专题 | 中国科学院地质与地球物理研究所 |
| 通讯作者 | Chen, DL |
| 作者单位 | 1.NW Univ Xian, Dept Geol, Xian 710069, Peoples R China 2.Chinese Acad Sci, Inst Geol & Geophys, Beijing 100029, Peoples R China |
| 推荐引用方式 GB/T 7714 | Chen, DL,Liu, L,Zhou, DW,et al. Genesis and Ar-40-Ar-39 dating of clinopyroxene megacrysts in ultramafic terrain from Songshugou, east Qinling Mountain and its geological implication.[J]. ACTA PETROLOGICA SINICA,2002,18(3):355-362. |
| APA | Chen, DL,Liu, L,Zhou, DW,Luo, JH,&Sang, HQ.(2002).Genesis and Ar-40-Ar-39 dating of clinopyroxene megacrysts in ultramafic terrain from Songshugou, east Qinling Mountain and its geological implication..ACTA PETROLOGICA SINICA,18(3),355-362. |
| MLA | Chen, DL,et al."Genesis and Ar-40-Ar-39 dating of clinopyroxene megacrysts in ultramafic terrain from Songshugou, east Qinling Mountain and its geological implication.".ACTA PETROLOGICA SINICA 18.3(2002):355-362. |
入库方式： OAI收割
来源：地质与地球物理研究所
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