Hf and O isotopic evidence for metamorphic crystallization of zircon during contact metamorphism of Fenniaolin metabasalts, Tananao complex, Taiwan
文献类型：期刊论文
| 作者 | Wintsch, R. P.1; Li, X. -H.2 |
| 刊名 | LITHOS
 |
| 出版日期 | 2014-09-15 |
| 卷号 | 205页码:142-147 |
| 关键词 | In situ zircon epsilon Hf In situ zircon delta O-18 Contact metamorphic zircon Taiwan metamorphism |
| ISSN号 | 0024-4937 |
| DOI | 10.1016/j.lithos.2014.06.011 |
| 文献子类 | Article |
| 英文摘要 | The epsilon Hf and delta O-18 compositions of zircons separated from an amphibolite in the Tananao complex of northeast Taiwan have been analyzed in order to test the hypothesis that these zircons are metamorphic in origin. A previous study found the U-Pb age of 18 zircons to be 86 +/- 1 Ma. The Hf-178/Hf-177 ratio of 13 of these zircons is rather constant with an average value of 0.283263 +/- 0.000037 (2 sigma SD) and a weighted mean of initial epsilon(Hf)(t) value of +19.2. The delta O-18 compositions of these same 13 grains and of 7 other grains vary from +1.2 to +2.0% with a weighted mean of +1.5 +/- 0.43 parts per thousand (2 sigma SD). The very positive epsilon(Hf)(t) values show that the protolith of this amphibolite had a primitive composition, consistent with N-MORB. The low 6180 values are not consistent with typical mantle values of similar to 5.3; rather we interpreted them to reflect metamorphic growth of zircon at greenschist facies conditions in a basalt already hydrothermally altered by seawater. In keeping with other studies, we conclude [1] that the host amphibolite was basalt of MORB composition extensively altered by seawater shortly after extrusion, [2] that the crystallization of the metamorphic zircons was caused by contact metamorphism of the host amphibolite by the 87 Ma intrusion of the adjacent granodiorite, and [3] that this metamorphism was not caused by the Neogene collision of the Philippine Sea plate with the south China margin. (C) 2014 Elsevier B.V. All rights reserved. |
| WOS关键词 | CHINA CONTINENTAL-MARGIN ; U-PB ISOTOPE ; TRACE-ELEMENT ; LU-HF ; SOUTHEASTERN CHINA ; OXYGEN ISOTOPES ; MAGMATIC ZIRCON ; ROCKS ; GEOCHRONOLOGY ; GEOCHEMISTRY |
| WOS研究方向 | Geochemistry & Geophysics ; Mineralogy |
| 语种 | 英语 |
| WOS记录号 | WOS:000342524800009 |
| 出版者 | ELSEVIER SCIENCE BV |
| 资助机构 | Ministry of Science and Technology of China(2012CB416702) ; Ministry of Science and Technology of China(2012CB416702) ; USA-NSF(ID-0803314 ; USA-NSF(ID-0803314 ; EAR-1019682) ; EAR-1019682) ; Ministry of Science and Technology of China(2012CB416702) ; Ministry of Science and Technology of China(2012CB416702) ; USA-NSF(ID-0803314 ; USA-NSF(ID-0803314 ; EAR-1019682) ; EAR-1019682) ; Ministry of Science and Technology of China(2012CB416702) ; Ministry of Science and Technology of China(2012CB416702) ; USA-NSF(ID-0803314 ; USA-NSF(ID-0803314 ; EAR-1019682) ; EAR-1019682) ; Ministry of Science and Technology of China(2012CB416702) ; Ministry of Science and Technology of China(2012CB416702) ; USA-NSF(ID-0803314 ; USA-NSF(ID-0803314 ; EAR-1019682) ; EAR-1019682) |
| 源URL | [http://ir.iggcas.ac.cn/handle/132A11/85381]  |
| 专题 | 中国科学院地质与地球物理研究所 |
| 通讯作者 | Wintsch, R. P. |
| 作者单位 | 1.Indiana Univ, Dept Geol Sci, Bloomington, IN 47405 USA 2.Inst Geol & Geophys, State Key Lab Lithospher Evolut, Beijing 1000029, Peoples R China |
| 推荐引用方式 GB/T 7714 | Wintsch, R. P.,Li, X. -H.. Hf and O isotopic evidence for metamorphic crystallization of zircon during contact metamorphism of Fenniaolin metabasalts, Tananao complex, Taiwan[J]. LITHOS,2014,205:142-147. |
| APA | Wintsch, R. P.,&Li, X. -H..(2014).Hf and O isotopic evidence for metamorphic crystallization of zircon during contact metamorphism of Fenniaolin metabasalts, Tananao complex, Taiwan.LITHOS,205,142-147. |
| MLA | Wintsch, R. P.,et al."Hf and O isotopic evidence for metamorphic crystallization of zircon during contact metamorphism of Fenniaolin metabasalts, Tananao complex, Taiwan".LITHOS 205(2014):142-147. |
入库方式： OAI收割
来源：地质与地球物理研究所
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