Hybrid phase equilibria modelling with conventional and trace element thermobarometry to assess the P-T evolution of UHT granulites: An example from the Highland Complex, Sri Lanka
文献类型：期刊论文
| 作者 | Dharmapriya, Prasanna L.8; Malaviarachchi, Sanjeewa P. K.8; Galli, Andrea11; Kriegsman, Leo M.1,7; Osanai, Yasuhito6; Sajeev, K.10; Su, Ben-Xun9; Tsunogae, Toshiaki4,5; Zhang, Chengli3; Adachi, Tatsuro6 |
| 刊名 | JOURNAL OF METAMORPHIC GEOLOGY
 |
| 出版日期 | 2020-10-08 |
| 页码 | 38 |
| ISSN号 | 0263-4929 |
| 关键词 | forward and inverse phase equilibria modelling Sri Lanka sapphirine granulites thermobarometry trace element thermometry |
| DOI | 10.1111/jmg.12569 |
| 英文摘要 | Here we attempt to constrain theP-Tevolution of ultrahigh-temperature granulites using textures coupled with multiple thermobarometric approaches. Sapphirine-bearing granulites were collected from a quarry in the central part of the Highland Complex of Sri Lanka. Three sapphirine-bearing domains were selected and petrographically studied. Homogeneous sample domains were thermodynamically modelled using their bulk compositions (forward phase equilibria modelling). One heterogeneous sample from a single domain, composed of irregularly distributed residuum and melt, was also used. The bulk composition of its residual part was calculated using mineral compositions and their respective modes. EquilibriumT-X(Fe2O3) phase diagrams were constructed in the chemical system NCKFMASHTO to estimate the bulk ferric/ferrous iron ratio, and conventional geothermometers (garnet-orthopyroxene and Al in orthopyroxene) were applied. The Ti in zircon trace element thermometer was also applied to calculate peak metamorphic conditions. Modal abundance isopleths of each mineral in equilibrium phase diagrams and textural observations were combined to constrain the retrogradeP-Tpath. Our hybrid approach of forward and inverse phase equilibria modelling and conventional thermobarometric calculations indicate that the sapphirine-bearing granulites have reached their peakTof 920-940 degrees C atP similar to 10 kbar under relatively highly oxidizing conditions. Subsequently, the rocks followed a near-isobaric cooling path down to 890-860 degrees C, prior to near-isothermal decompression up to 6 kbar. The results highlight the importance of dealing with Fe3+. Multiple thermobarometric approaches on carefully observed mineral textures are required to retrieve the most reliableP-Tconditions of HT/UHT mineral assemblages. |
| WOS关键词 | ULTRAHIGH-TEMPERATURE METAMORPHISM ; SAPPHIRINE PLUS QUARTZ ; RELATIONS INVOLVING CORDIERITE ; HIGH-GRADE ROCKS ; ORTHO-PYROXENE ; U-PB ; HIGH-PRESSURE ; MINERAL EQUILIBRIA ; REACTION TEXTURES ; METAPELITIC ASSEMBLAGES |
| 资助项目 | Indo-Sri Lanka Joint Research Grant from the Ministry of Technology and Research, Sri Lanka[MTR/TRD/AGR/3/2/20] ; Department of Science & Technology, Government of India[DST/INT/SL/P-24/2016] ; Youth Innovation Promotion Association, Chinese Academy of Sciences[2016067] ; National Research Council (NRC) of Sri Lanka[15-089] ; University of Peradeniya[URG/18/043] |
| WOS研究方向 | Geology |
| 语种 | 英语 |
| 出版者 | WILEY |
| WOS记录号 | WOS:000578822900001 |
| 资助机构 | Indo-Sri Lanka Joint Research Grant from the Ministry of Technology and Research, Sri Lanka ; Indo-Sri Lanka Joint Research Grant from the Ministry of Technology and Research, Sri Lanka ; Department of Science & Technology, Government of India ; Department of Science & Technology, Government of India ; Youth Innovation Promotion Association, Chinese Academy of Sciences ; Youth Innovation Promotion Association, Chinese Academy of Sciences ; National Research Council (NRC) of Sri Lanka ; National Research Council (NRC) of Sri Lanka ; University of Peradeniya ; University of Peradeniya ; Indo-Sri Lanka Joint Research Grant from the Ministry of Technology and Research, Sri Lanka ; Indo-Sri Lanka Joint Research Grant from the Ministry of Technology and Research, Sri Lanka ; Department of Science & Technology, Government of India ; Department of Science & Technology, Government of India ; Youth Innovation Promotion Association, Chinese Academy of Sciences ; Youth Innovation Promotion Association, Chinese Academy of Sciences ; National Research Council (NRC) of Sri Lanka ; National Research Council (NRC) of Sri Lanka ; University of Peradeniya ; University of Peradeniya ; Indo-Sri Lanka Joint Research Grant from the Ministry of Technology and Research, Sri Lanka ; Indo-Sri Lanka Joint Research Grant from the Ministry of Technology and Research, Sri Lanka ; Department of Science & Technology, Government of India ; Department of Science & Technology, Government of India ; Youth Innovation Promotion Association, Chinese Academy of Sciences ; Youth Innovation Promotion Association, Chinese Academy of Sciences ; National Research Council (NRC) of Sri Lanka ; National Research Council (NRC) of Sri Lanka ; University of Peradeniya ; University of Peradeniya ; Indo-Sri Lanka Joint Research Grant from the Ministry of Technology and Research, Sri Lanka ; Indo-Sri Lanka Joint Research Grant from the Ministry of Technology and Research, Sri Lanka ; Department of Science & Technology, Government of India ; Department of Science & Technology, Government of India ; Youth Innovation Promotion Association, Chinese Academy of Sciences ; Youth Innovation Promotion Association, Chinese Academy of Sciences ; National Research Council (NRC) of Sri Lanka ; National Research Council (NRC) of Sri Lanka ; University of Peradeniya ; University of Peradeniya |
| 源URL | [http://ir.iggcas.ac.cn/handle/132A11/98322]  |
| 专题 | 地质与地球物理研究所_中国科学院矿产资源研究重点实验室 |
| 通讯作者 | Dharmapriya, Prasanna L.; Malaviarachchi, Sanjeewa P. K. |
| 作者单位 | 1.Nat Biodivers Ctr, Dept Educ Res, Leiden, Netherlands 2.Natl Inst Fundamental Studies, Kandy, Sri Lanka 3.Northwest Univ, Dept Geol, Key Lab Continental Dynam, Xian, Peoples R China 4.Univ Tsukuba, Fac Life & Environm Sci, Ibaraki, Japan 5.Univ Johannesburg, Dept Geol, Auckland Pk, South Africa 6.Kyushu Univ, Fac Social & Cultural Studies, Div Earth Sci, Dept Environm Changes, Fukuoka, Japan 7.Univ Utrecht, Dept Earth Sci, Utrecht, Netherlands 8.Univ Peradeniya, Dept Geol, Fac Sci, Peradeniya 20400, Sri Lanka 9.Chinese Acad Sci, Inst Geol & Geophys, Key Lab Mineral Resources, Beijing, Peoples R China 10.Indian Inst Sci, Ctr Earth Sci, Bangalore, Karnataka, India |
| 推荐引用方式 GB/T 7714 | Dharmapriya, Prasanna L.,Malaviarachchi, Sanjeewa P. K.,Galli, Andrea,et al. Hybrid phase equilibria modelling with conventional and trace element thermobarometry to assess the P-T evolution of UHT granulites: An example from the Highland Complex, Sri Lanka[J]. JOURNAL OF METAMORPHIC GEOLOGY,2020:38. |
| APA | Dharmapriya, Prasanna L..,Malaviarachchi, Sanjeewa P. K..,Galli, Andrea.,Kriegsman, Leo M..,Osanai, Yasuhito.,...&Subasinghe, Nalaka Deepal.(2020).Hybrid phase equilibria modelling with conventional and trace element thermobarometry to assess the P-T evolution of UHT granulites: An example from the Highland Complex, Sri Lanka.JOURNAL OF METAMORPHIC GEOLOGY,38. |
| MLA | Dharmapriya, Prasanna L.,et al."Hybrid phase equilibria modelling with conventional and trace element thermobarometry to assess the P-T evolution of UHT granulites: An example from the Highland Complex, Sri Lanka".JOURNAL OF METAMORPHIC GEOLOGY (2020):38. |
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来源：地质与地球物理研究所
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