The Capability of Amphibole in Tracing the Physicochemical Processes of Magma Mixing
Abstract This study explores the capability of amphibole in tracing the physicochemical process of magma mixing through spatially associated gabbros, mafic microgranular enclaves (MMEs) and granodiorites from central Tibet. These rocks share similar zircon ages as well as zircon Hf‐O and plagioclase...
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| Format: | Article |
| Language: | English |
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Wiley
2024-07-01
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| Series: | Geophysical Research Letters |
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| Online Access: | https://doi.org/10.1029/2024GL108906 |
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| author | Mingjian Li Yunchuan Zeng Massimo Tiepolo Jifeng Xu Enrico Cannaò Francesca Forni Feng Huang |
| author_facet | Mingjian Li Yunchuan Zeng Massimo Tiepolo Jifeng Xu Enrico Cannaò Francesca Forni Feng Huang |
| author_sort | Mingjian Li |
| collection | DOAJ |
| description | Abstract This study explores the capability of amphibole in tracing the physicochemical process of magma mixing through spatially associated gabbros, mafic microgranular enclaves (MMEs) and granodiorites from central Tibet. These rocks share similar zircon ages as well as zircon Hf‐O and plagioclase Sr isotopes. However, the amphiboles within the gabbros and granodiorites have different Sr and B isotope compositions, while amphiboles with both heterogeneous isotopic imprints occur in the MMEs. According to data and modeling, significant mixing of two isotopically distinct magmas is recorded by amphibole but not by zircon and plagioclase. Based on a synthesis of petrography, geochemistry and thermobarometry, we interpret this inconsistency by the crystallization order of minerals and propose that magma mixing occurred after the parent magma was emplaced at ∼10 km and cooled to ∼750°C. Our study highlights that amphibole may be a more sensitive tracer of magma mixing relative to other commonly used methods. |
| format | Article |
| id | doaj-art-2b9007aacf7d41dbb547d63adc96c8eb |
| institution | Kabale University |
| issn | 0094-8276 1944-8007 |
| language | English |
| publishDate | 2024-07-01 |
| publisher | Wiley |
| record_format | Article |
| series | Geophysical Research Letters |
| spelling | doaj-art-2b9007aacf7d41dbb547d63adc96c8eb2025-08-20T03:49:46ZengWileyGeophysical Research Letters0094-82761944-80072024-07-015114n/an/a10.1029/2024GL108906The Capability of Amphibole in Tracing the Physicochemical Processes of Magma MixingMingjian Li0Yunchuan Zeng1Massimo Tiepolo2Jifeng Xu3Enrico Cannaò4Francesca Forni5Feng Huang6School of Earth Science and Resources, Frontiers Science Center for Deep‐time Digital Earth, and State Key Laboratory of Geological Processes and Mineral Resources China University of Geosciences Beijing ChinaSchool of Earth Science and Resources, Frontiers Science Center for Deep‐time Digital Earth, and State Key Laboratory of Geological Processes and Mineral Resources China University of Geosciences Beijing ChinaDipartimento di Scienze della Terra “A. Desio” Università degli Studi di Milano Milano ItalySchool of Earth Science and Resources, Frontiers Science Center for Deep‐time Digital Earth, and State Key Laboratory of Geological Processes and Mineral Resources China University of Geosciences Beijing ChinaDipartimento di Scienze della Terra “A. Desio” Università degli Studi di Milano Milano ItalyDipartimento di Scienze della Terra “A. Desio” Università degli Studi di Milano Milano ItalySchool of Earth Science and Resources, Frontiers Science Center for Deep‐time Digital Earth, and State Key Laboratory of Geological Processes and Mineral Resources China University of Geosciences Beijing ChinaAbstract This study explores the capability of amphibole in tracing the physicochemical process of magma mixing through spatially associated gabbros, mafic microgranular enclaves (MMEs) and granodiorites from central Tibet. These rocks share similar zircon ages as well as zircon Hf‐O and plagioclase Sr isotopes. However, the amphiboles within the gabbros and granodiorites have different Sr and B isotope compositions, while amphiboles with both heterogeneous isotopic imprints occur in the MMEs. According to data and modeling, significant mixing of two isotopically distinct magmas is recorded by amphibole but not by zircon and plagioclase. Based on a synthesis of petrography, geochemistry and thermobarometry, we interpret this inconsistency by the crystallization order of minerals and propose that magma mixing occurred after the parent magma was emplaced at ∼10 km and cooled to ∼750°C. Our study highlights that amphibole may be a more sensitive tracer of magma mixing relative to other commonly used methods.https://doi.org/10.1029/2024GL108906amphibolemagma mixingSr and B isotoperesidual slabthermobarometerTibetan Plateau |
| spellingShingle | Mingjian Li Yunchuan Zeng Massimo Tiepolo Jifeng Xu Enrico Cannaò Francesca Forni Feng Huang The Capability of Amphibole in Tracing the Physicochemical Processes of Magma Mixing Geophysical Research Letters amphibole magma mixing Sr and B isotope residual slab thermobarometer Tibetan Plateau |
| title | The Capability of Amphibole in Tracing the Physicochemical Processes of Magma Mixing |
| title_full | The Capability of Amphibole in Tracing the Physicochemical Processes of Magma Mixing |
| title_fullStr | The Capability of Amphibole in Tracing the Physicochemical Processes of Magma Mixing |
| title_full_unstemmed | The Capability of Amphibole in Tracing the Physicochemical Processes of Magma Mixing |
| title_short | The Capability of Amphibole in Tracing the Physicochemical Processes of Magma Mixing |
| title_sort | capability of amphibole in tracing the physicochemical processes of magma mixing |
| topic | amphibole magma mixing Sr and B isotope residual slab thermobarometer Tibetan Plateau |
| url | https://doi.org/10.1029/2024GL108906 |
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