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Metamorphic P-T path and geochronology of garnet-bearing amphibolite of the Inyoni Shear Zone, southwestern Barberton Greenstone Belt, South Africa
Peng, Tao1; Wang, Guo-Dong1,2; Wang, Hao Y. C.1,3; Liu, Jia-Hui1; Zhang, Hui C. G.1; Chen, Hong-Xu1,4; Wu, Chun-Ming1
2019-02-01
Source PublicationPRECAMBRIAN RESEARCH
ISSN0301-9268
Volume321Pages:261-276
AbstractGeothermobarometry and phase equilibria modeling were conducted for garnet-bearing amphibolite of the Inyoni Shear Zone (ISZ), southwestern Barberton Greenstone Belt, South Africa. The prograde (M1), metamorphic peak (M2) and retrograde (M3) metamorphic P-T conditions were estimated to be similar to 560 degrees C/ similar to 8 kbar, 660-730 degrees C/7-9.5 kbar and 570-630 degrees C/5-6 kbar, respectively. The amphibolite records clockwise P-T paths, and the metamorphic peak P-T conditions belong to the medium P/T facies series. The retrograde segment of the P-T path documents near isothermal decompression which may reflect relative fast exhumation. The estimated apparent geotherm is 20-30 C/km. SIMS U-Pb dating of metamorphic zircon suggests that the metamorphism of the ISZ amphibolite have occurred during similar to 3.26-3.22 Ga, and the metamorphic peak might occur at similar to 3.24 Ga. Furthermore, Ar-40/Ar-39 dating of hornblende indicates that the cooling stage might occur at similar to 3.20 Ga. It is anticipated that the protolith of the amphibolite of the ISZ may have been involved in a subduction-like tectonic process along with the TTG plutons and was metamorphosed during 3.26-3.22 Ga, then uplifted from within the surrounding TTG plutons at similar to 3.20 Ga.
KeywordInyoni Shear Zone Barberton Greenstone Belt Amphibolite Geothermobarometry Pseudosection modeling Geochronology
DOI10.1016/j.precamres.2018.12.021
Funding OrganizationKey Research Program of Frontier Sciences from the Chinese Academy of Sciences ; Key Research Program of Frontier Sciences from the Chinese Academy of Sciences ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; Key Research Program of Frontier Sciences from the Chinese Academy of Sciences ; Key Research Program of Frontier Sciences from the Chinese Academy of Sciences ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; Key Research Program of Frontier Sciences from the Chinese Academy of Sciences ; Key Research Program of Frontier Sciences from the Chinese Academy of Sciences ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; Key Research Program of Frontier Sciences from the Chinese Academy of Sciences ; Key Research Program of Frontier Sciences from the Chinese Academy of Sciences ; National Natural Science Foundation of China ; National Natural Science Foundation of China
WOS KeywordMINERAL EQUILIBRIA CALCULATIONS ; U-PB ; TERRANE SOUTH ; MOUNTAIN LAND ; CORE-COMPLEX ; LU-HF ; EVOLUTION ; CHINA ; ZIRCON ; CONSTRAINTS
Language英语
Funding ProjectKey Research Program of Frontier Sciences from the Chinese Academy of Sciences[QYZDJ-SSW-DQC036] ; National Natural Science Foundation of China[41730215]
Funding OrganizationKey Research Program of Frontier Sciences from the Chinese Academy of Sciences ; Key Research Program of Frontier Sciences from the Chinese Academy of Sciences ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; Key Research Program of Frontier Sciences from the Chinese Academy of Sciences ; Key Research Program of Frontier Sciences from the Chinese Academy of Sciences ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; Key Research Program of Frontier Sciences from the Chinese Academy of Sciences ; Key Research Program of Frontier Sciences from the Chinese Academy of Sciences ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; Key Research Program of Frontier Sciences from the Chinese Academy of Sciences ; Key Research Program of Frontier Sciences from the Chinese Academy of Sciences ; National Natural Science Foundation of China ; National Natural Science Foundation of China
WOS Research AreaGeology
WOS SubjectGeosciences, Multidisciplinary
WOS IDWOS:000457657500016
PublisherELSEVIER SCIENCE BV
Citation statistics
Document Type期刊论文
Identifierhttp://ir.iggcas.ac.cn/handle/132A11/90523
Collection岩石圈演化国家重点实验室
Corresponding AuthorWu, Chun-Ming
Affiliation1.Univ Chinese Acad Sci, Coll Earth & Planetary Sci, POB 4588, Beijing 100049, Peoples R China
2.Linyi Univ, Coll Resources & Environm, Linyi 276000, Peoples R China
3.Chinese Acad Sci, Inst Geol & Geophys, State Key Lab Lithospher Evolut, POB 9825, Beijing 100029, Peoples R China
4.Chinese Acad Geol Sci, SinoProbe Ctr, 26 Baiwanzhuang St, Beijing 100037, Peoples R China
Recommended Citation
GB/T 7714
Peng, Tao,Wang, Guo-Dong,Wang, Hao Y. C.,et al. Metamorphic P-T path and geochronology of garnet-bearing amphibolite of the Inyoni Shear Zone, southwestern Barberton Greenstone Belt, South Africa[J]. PRECAMBRIAN RESEARCH,2019,321:261-276.
APA Peng, Tao.,Wang, Guo-Dong.,Wang, Hao Y. C..,Liu, Jia-Hui.,Zhang, Hui C. G..,...&Wu, Chun-Ming.(2019).Metamorphic P-T path and geochronology of garnet-bearing amphibolite of the Inyoni Shear Zone, southwestern Barberton Greenstone Belt, South Africa.PRECAMBRIAN RESEARCH,321,261-276.
MLA Peng, Tao,et al."Metamorphic P-T path and geochronology of garnet-bearing amphibolite of the Inyoni Shear Zone, southwestern Barberton Greenstone Belt, South Africa".PRECAMBRIAN RESEARCH 321(2019):261-276.
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