Different origins of garnet in high pressure to ultrahigh pressure metamorphic rocks
文献类型：期刊论文
| 作者 | Xia, Qiong-Xia1; Zhou, Li-Gang2 |
| 刊名 | JOURNAL OF ASIAN EARTH SCIENCES
 |
| 出版日期 | 2017-09-01 |
| 卷号 | 145页码:130-148 |
| 关键词 | Garnet Multiphase growth Metamorphic reaction Peritectic reaction Subduction zone |
| ISSN号 | 1367-9120 |
| DOI | 10.1016/j.jseaes.2017.03.037 |
| 文献子类 | Article |
| 英文摘要 | Garnet in high-pressure (HP) to ultrahigh-pressure (UHP) metamorphic rocks in subduction zone commonly shows considerable zonation in major and trace elements as well as mineral inclusions, which bears information on its growth mechanism via metamorphic or peritectic reactions in coexistence with relic minerals and metamorphic fluids or anatectic melts at subduction-zone conditions. It provides an important target to retrieve physicochemical changes in subduction-zone processes, including those not only in pressure and temperature but also in the durations of metamorphism and anatexis. Garnet from different compositions of HP to UHP metamorphic rocks may show different types of major and trace element zonation, as well as mineral inclusions. Discrimination between the different origins of garnet provides important constraints on pressure and temperature and the evolution history for the HP to UHP metamorphic rocks. Magmatic garnet may occur as relics in granitic gneisses despite metamorphic modification at subduction-zone conditions, with spessartine-increasing or flat major element profiles from inner to outer core and exceptionally higher contents of trace elements than metamorphic mantle and rim. Metamorphic garnet can grow at different metamorphic stages during prograde subduction and retrograde exhumation, with spessartine-decreasing from core to rim if the intracrystalline diffusion is not too fast. The compositional profiles of metamorphic garnet in the abundances of grossular, almandine and pyrope are variable depending on the composition of host rocks and co-existing minerals. Peritectic garnet grows through peritectic reactions during partial melting of HP to UHP rocks, with the composition of major elements to be controlled by anatectic P-T conditions and the compositions of parental rocks and anatectic melts. Trace element profiles in garnet with different origins are also variable depending on the coexisting mineral assemblages, the garnet-forming reactions and the property of metamorphic fluids or anatectic melts. Mineral inclusions not only present key clues to identify the different origins of garnet, but also serve as sound candidates for the temporal constraint on garnet growth. |
| WOS关键词 | SUBDUCTED CONTINENTAL-CRUST ; P-T PATHS ; WESTERN DABIE MOUNTAINS ; MINERAL REPLACEMENT REACTIONS ; MULTIPHASE SOLID INCLUSIONS ; HIGH-GRADE METAMORPHISM ; LOW-T/UHP METAGRANITE ; LU-HF GEOCHRONOLOGY ; RARE-EARTH-ELEMENT ; SM-ND AGE |
| WOS研究方向 | Geology |
| 语种 | 英语 |
| WOS记录号 | WOS:000410012200010 |
| 出版者 | PERGAMON-ELSEVIER SCIENCE LTD |
| 资助机构 | Chinese Ministry of Science and Technology(201503856100) ; Natural Science Foundation of China(41272082 ; 41590620) ; Chinese Ministry of Science and Technology(201503856100) ; Natural Science Foundation of China(41272082 ; 41590620) ; Chinese Ministry of Science and Technology(201503856100) ; Natural Science Foundation of China(41272082 ; 41590620) ; Chinese Ministry of Science and Technology(201503856100) ; Natural Science Foundation of China(41272082 ; 41590620) |
| 源URL | [http://ir.iggcas.ac.cn/handle/132A11/61891]  |
| 专题 | 地质与地球物理研究所_岩石圈演化国家重点实验室 |
| 通讯作者 | Xia, Qiong-Xia |
| 作者单位 | 1.Univ Sci & Technol China, Sch Earth & Space Sci, CAS Key Lab Crust Mantle Mat & Environm, Hefei 230026, Anhui, Peoples R China 2.Chinese Acad Sci, Inst Geol & Geophys, State Key Lab Lithospher Evolut, Beijing 100029, Peoples R China |
| 推荐引用方式 GB/T 7714 | Xia, Qiong-Xia,Zhou, Li-Gang. Different origins of garnet in high pressure to ultrahigh pressure metamorphic rocks[J]. JOURNAL OF ASIAN EARTH SCIENCES,2017,145:130-148. |
| APA | Xia, Qiong-Xia,&Zhou, Li-Gang.(2017).Different origins of garnet in high pressure to ultrahigh pressure metamorphic rocks.JOURNAL OF ASIAN EARTH SCIENCES,145,130-148. |
| MLA | Xia, Qiong-Xia,et al."Different origins of garnet in high pressure to ultrahigh pressure metamorphic rocks".JOURNAL OF ASIAN EARTH SCIENCES 145(2017):130-148. |
入库方式： OAI收割
来源：地质与地球物理研究所
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