Post-magmatic fracturing, fluid flow, and vein mineralization in supra-subduction zones: a comparative study on vein calcites from the Troodos ophiolite and the Izu–Bonin forearc and rear arc
| Autor: | Walter Kurz, Peter Micheuz, Dennis Quandt |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2021 |
| Předmět: |
Calcite
Mineralization (geology) Original Paper Microtextures Subduction Geography & travel Thin section Geochemistry Calcite veins Petrography chemistry.chemical_compound chemistry Izu–Bonin forearc cardiovascular system General Earth and Planetary Sciences Troodos Ophiolite Vein (geology) Forearc Troodos ophiolite Geology ddc:910 |
| Zdroj: | International Journal of Earth Sciences International journal of earth sciences, 110 (2), 627–649 |
| ISSN: | 1437-3262 1437-3254 |
| Popis: | Based on the published data of pillow lava-hosted mineralized veins, this study compares post-magmatic fracturing, fluid flow, and secondary mineralization processes in the Troodos and Izu–Bonin supra-subduction zone (SSZ) and discusses the crucial factors for the development of distinct vein types. Thin section and cathodoluminescence petrography, Raman spectroscopy, fluid inclusion microthermometry, and trace element and isotope (87Sr/86Sr, δ18O, δ13C, Δ47) geochemistry indicate that most veins consist of calcite that precipitated from pristine to slightly modified seawater at temperatures 15 Myr after subduction initiation. Therefore, high-T mineralization (calcite, quartz, analcime) up to 230 °C is restricted to the Troodos SSZ. |
| Databáze: | OpenAIRE |
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