Isochemical metamorphism origin of the newly discovered Baqing jadeitoid, eastern-central Tibet, China
文献类型：期刊论文
| 作者 | Jin, Xin2,3,4; Whitney, Donna L.5; Zhang, Yu-Xiu3; Blatchford, Hannah J.5,6; Zhang, Kai-Jun3; Tsujimori, Tatsuki7; Xiao, Yuan-Yuan8; Liu, Hai-Yang2; von der Handt, Anette9; Yan, Li-Long10 |
| 刊名 | JOURNAL OF METAMORPHIC GEOLOGY
 |
| 出版日期 | 2024-07-11 |
| 页码 | 29 |
| 关键词 | Baqing metamorphic complex isochemical metamorphism jadeitite jadeitoid prograde metamorphism Tibet Zr-in-rutile |
| ISSN号 | 0263-4929 |
| DOI | 10.1111/jmg.12790 |
| 通讯作者 | Zhang, Yu-Xiu(zhangyuxiou@ucas.edu.cn) ; Zhang, Kai-Jun(kaijun@ucas.ac.cn) ; Xiao, Yuan-Yuan(yuanyuan.xiao@qdio.ac.cn) |
| 英文摘要 | The formation of most jadeitites and other jadeite-rich rocks (jadeitoids) during subduction is thought to occur by precipitation (P-type) or metasomatism (R-type) by infiltration of Na-Al-Si-rich aqueous fluids because of the compositional similarity of the rocks to inferred subduction fluids. Whether these rocks can form by isochemical metamorphism (I-type) during subduction is still hotly debated. A characteristic of I-type jadeitoid is that it exhibits a similar prograde metamorphic record as associated eclogite, in contrast to P- and R-type jadeitite and jadeitoids that are typically enclosed in serpentinite derived from the mantle wedge and either lack a prograde metamorphic history (R-type and P-type) or probably experience a prograde history (R-type) that is difficult to discern owing to the high variance of the jadeite-dominated assemblages and alteration by subduction fluids. The recently discovered Baqing (eastern-central Tibet) jadeitoid is enclosed by quartzo-feldspathic schist and has a peak metamorphic assemblage of almandine + jadeite/omphacite + phengite/paragonite + rutile + quartz, similar to eclogite. Abundant mineral inclusions in almandine, especially rutile inclusions with increasing Zr contents from the core to rim of almandine, provide an opportunity to further decode the jadeitoid-forming processes. In this study, pseudosections and Zr-in-rutile thermometry, together with conventional geothermobarometers, were employed to decipher the metamorphic history of Baqing jadeitoids. Two analysed Baqing jadeitoids exhibit a similar clockwise P-T path, starting from early metamorphic conditions of 5-7 kbar, 350-440 degrees C, to different peak conditions (27-29 kbar, 730-760 degrees C, or 20-23 kbar, 670-710 degrees C), followed by relatively consistent retrograde metamorphic conditions of 6-7 kbar, 530-600 degrees C. This result indicates a similar subduction history to the Baqing eclogite. In addition, the Baqing jadeitoids show similar geochemical characteristics to some Na-rich, K-depleted and Ca-depleted sedimentary rocks or plagiogranite. Therefore, we propose an isochemical genesis for the Baqing jadeitoid, rather than a metasomatic origin. |
| WOS关键词 | MOTAGUA FAULT ZONE ; SERPENTINITE MELANGES ; DABIE MOUNTAINS ; NORTHERN TIBET ; HIGH-PRESSURE ; BEARING ; ROCKS ; ECLOGITES ; QUARTZITE ; FLUID |
| 资助项目 | National Natural Science Foundation of China[41472209] ; National Natural Science Foundation of China[42302048] ; National Natural Science Foundation of China[40802048] ; National Natural Science Foundation of China[42002218] ; Second Tibetan Plateau Scientific Expedition andResearch Program[2019QZKK0703] ; Fundamental ResearchFunds for the Central Universities[Y95401BXX2] ; Fundamental ResearchFunds for the Central Universities[E2E40409X2] ; Strategic Priority Research Program of the Chinese Academy of Sciences[XDA22050103] ; Strategic Priority Research Program of the Chinese Academy of Sciences[XDB42020303] ; Project of Exploration and Development ResearchInstitute, Northwest Oilfield Company,Sinopec[34400008-22-ZC0607-0044] ; College ofScience and Engineering; TaishanScholars Program ; China PostdoctoralScience Foundation[2021M703243] ; Shandong Postdoctoral Innovation Project[202103013] ; China Scholarship Council[201704910717] ; Natural ScienceYouth Foundation of Shandong Province[ZR2022QD039] ; Qingdao Postdoctoral Applied Research Program[E1KY12107N] |
| WOS研究方向 | Geology |
| 语种 | 英语 |
| WOS记录号 | WOS:001270031000001 |
| 出版者 | WILEY |
| 源URL | [http://ir.qdio.ac.cn/handle/337002/186269]  |
| 专题 | 海洋研究所_深海极端环境与生命过程研究中心 海洋研究所_海洋地质与环境重点实验室 |
| 通讯作者 | Zhang, Yu-Xiu; Zhang, Kai-Jun; Xiao, Yuan-Yuan |
| 作者单位 | 1.China Univ Min & Technol, Key Lab Coalbed Methane Resources & Reservoir Form, Minist Educ China, Xuzhou, Peoples R China 2.Chinese Acad Sci, Ctr Deep Sea Res, Inst Oceanol, Qingdao, Peoples R China 3.Univ Chinese Acad Sci, Coll Earth & Planetary Sci, 19A Yuquan Rd, Beijing 100049, Peoples R China 4.Zhejiang Ocean Univ, Dept Ocean Explorat & Technol, Zhoushan, Peoples R China 5.Univ Minnesota, Dept Earth & Environm Sci, Minneapolis, MN USA 6.Eastern Michigan Univ, Dept Geog & Geol, Ypsilanti, MI USA 7.Tohoku Univ, Ctr North East Asian Studies, Sendai, Miyagi, Japan 8.Chinese Acad Sci, Inst Oceanol, Key Lab Marine Geol & Environm, Qingdao, Peoples R China 9.Univ British Columbia, Dept Earth Ocean & Atmospher Sci, Vancouver, BC, Canada 10.Chinese Acad Geol Sci, Key Lab Deep Earth Dynam, Minist Nat Resources, Inst Geol, Beijing, Peoples R China |
| 推荐引用方式 GB/T 7714 | Jin, Xin,Whitney, Donna L.,Zhang, Yu-Xiu,et al. Isochemical metamorphism origin of the newly discovered Baqing jadeitoid, eastern-central Tibet, China[J]. JOURNAL OF METAMORPHIC GEOLOGY,2024:29. |
| APA | Jin, Xin.,Whitney, Donna L..,Zhang, Yu-Xiu.,Blatchford, Hannah J..,Zhang, Kai-Jun.,...&Li, Cong-Ying.(2024).Isochemical metamorphism origin of the newly discovered Baqing jadeitoid, eastern-central Tibet, China.JOURNAL OF METAMORPHIC GEOLOGY,29. |
| MLA | Jin, Xin,et al."Isochemical metamorphism origin of the newly discovered Baqing jadeitoid, eastern-central Tibet, China".JOURNAL OF METAMORPHIC GEOLOGY (2024):29. |
入库方式： OAI收割
来源：海洋研究所
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