Zusammenfassung
Der rezente Spaltenvulkanismus von Kouh-e-Tchah-e-Shahi ist nicht differenziert und besteht hauptsächlich aus andesitischem, an Olivin, Diopsid, Pigeonit und Labrador-Bytownit reichem Basalt. Die Entwicklung, die zur Restschmelze führt, läßt unmischbare Gläser entstehen.
Der vulkanische Bogen von Bazman-Taftan wird gedeutet als Subduktionsvulkanismus einer ozeanischen Kruste des Indischen Ozeans, die hinter dem Rücken von Makran von Jaz Murian an tief abtaucht.
Abstract
The recent fissural volcanism of Kouh-e-Tchah-e-Shahi is undifferentiated and consists mainly in andesitic basalt, rich in olivine, diopside, pigeonite, and labradorbytownite. The evolution, which leads to residual liquids, shows glasses unmiscible between one another.
The volcanic arc of Bazman-Taftan and Kouh-e-Tchah-e-Shahi is interpreted as a subducting volcanism of an oceanic crust of the Indian Ocean, deeply diving from Jaz Murian behind the accretional prism of Makran.
Résumé
Le volcanisme fissurai du Kouh-e-Tchah-e-Shahi, subrécent, est indifférencié avec essentiellement des basaltes andésitiques à olivine, diopside, pigeonite, bytownite-labrador. L'évolution qui conduit aux liquides résiduels fait apparaître des verres immiscibles entre-eux.
L'arc volcanique Bazman-Taftan, avec le Kouh-e-Tchah-e-Shahi, est intreprété comme un volcanisme de subduction à la verticale d'une croûte océanique de l'Océan Indien, fortement plongeante à partir du Jaz Murian, en arrière du prisme d'accrétion du Makran.
Краткое содержание
Лава современных тре щиных излияний в Kouh-e-Tchah-e-Shahi н е дифференцирована и состоит гл. обр. из анд езитного базальта, бо гатого оливином, диопсидом, п игеонитом и лабрадор-бидовнито м. Из её остатков образ уется вулканическое стекл о, не смешивающееся с другими породами. Сч итают, что вулканичес кая дуга Bazman-Taffan образовались из океанической коры Индийского океана.
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Brousse, R., Vaziri, H.M. Le Volcanisme du Kouh-e-Tchah-e-Shahi au nord du Makran(Iran). Geol Rundsch 69, 208–215 (1980). https://doi.org/10.1007/BF01869033
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DOI: https://doi.org/10.1007/BF01869033