Project information
Multiphase solid inclusions in orogenic peridotites as tracers of metasomatism in collisional orogens
- Project Identification
- GA22-33820S
- Project Period
- 1/2022 - 12/2024
- Investor / Pogramme / Project type
-
Czech Science Foundation
- Standard Projects
- MU Faculty or unit
- Faculty of Science
- Cooperating Organization
-
Czech Geological Survey
- Responsible person Lukáš Ackerman
- Responsible person Tamara Sidorinová
- Responsible person doc. RNDr. Jana Kotková, CSc.
Orogenic peridotites exposed in UHP terranes in collisional orogens record metasomatism by fluids derived from the subducting slab. Multiphase solid inclusions (MSI) trapped in their peak minerals, mostly garnet, record information on physical and chemical composition of these deep fluids. We focus on MSI in garnet peridotites and pyroxenites in the Bohemian Massif (European Variscan Belt) to test the hypothesis that mantle metasomatism in hot orogens is a multiphase process, facilitated by percolating supercritical melts of mixed crust-mantle origin (now garnetpreserved as pyroxenite veinss). To achieve that, we will reconstruct bulk chemical composition of the well-preserved MSI. We will also along with use high-resolution analytical techniques to measure specify contents of halideschemical composition including major and and trace elements and C, O, Cl, resp. Sr isotope composition MSI constituents (silicates, graphite, carbonates, apatite) as proxies for distinction of the source of metasomatizing agents. P-T-t constraints on formation and metasomatism will be also provided using thermodynamic modelling and different geochronological methods, Lu-Hf dating, and in-situ U-(Th)-Pb dating of garnet and Th-U phases.
Publications
Total number of publications: 5
2024
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Complex metasomatic history and exhumation-driven refertilization of subcontinental lithospheric mantle beneath Central Europe
4th European Mineralogical Conference, year: 2024
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Immiscible fluids and melts trapped in garnet from pyroxenite-veined garnet peridotites related to metasomatism by basaltic melts
4th European Mineralogical Conference, year: 2024
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Unravelling different mechanisms of metasomatism and geodynamic evolution of pyroxenite-veined subcontinental lithospheric mantle beneath the Central European Variscides
Journal of Petrology, year: 2024, edition: October, DOI
2023
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Large-scale HFSE and REE mobility linked to the formation of vein-type U-deposits in the Moldanubian Zone of the Bohemian Massif
Mineral Resources in a Changing World, 17th SGA Biennial Meeting 2023, Volume 3, year: 2023
2022
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Polyphase geodynamic evolution of heterogenous mantle beneath the Variscan Orogenic Belt (Moldanubian Zone, Bohemian Massif)
Year: 2022, type: Appeared in Conference without Proceedings