1. The First Discovery of Low-temperature Rhyolite Melts in Cenozoic Long-lived Bazman Volcano, East Iran; Some Problems and Discussion
- Author
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Alexander Savichev, Ilya Vikentev, N. A. Imamverdiyev, Pavel Plechov, Anna Balashova, Alexander Romanko, Vsevolod Prokof’ev, Vladimir Naumov, Mehrdad Hedari, and Bahman Rashidi
- Subjects
Igneous rock ,010504 meteorology & atmospheric sciences ,Rhyolite ,Magmatism ,Geochemistry ,010502 geochemistry & geophysics ,Quaternary ,01 natural sciences ,Cenozoic ,Paleogene ,0105 earth and related environmental sciences ,Melt inclusions ,Metallogeny - Abstract
The igneous rocks, some geological specifics, and also the very melt inclusions in Late Cenozoic rhyolites were studied in the long-lived Miocene (N1, ca. 20 Ma) - Late Quaternary (Q3?) Bazman volcano, eastern Iran. Unusual low temperature (ca. 690o C) silicate melt inclusions in quartz (Qtz) with a High/very High water content (from average 6.9 to 8.2 (up to 9.0 as a limit) wt% H2O) in the acid rocks were defined by independent methods for the first time. Whole-rock chemistry of the melts studied is similar to ones in subduction-related acid melts from different regions. Rhyolites studied sometimes have higher concentration of ore elements, similar to ones in even basites. Ore inheritance from economic porphyry – PCD (Cu-Au +- Mo) Paleogene (mainly Eocene - Pg2) mineralization and deposits in the region is proposed. Geological anomaly of the whole region is proposed by a complex analysis. This anomaly is maybe responsible for anomalous magmatism due to a known tomography data (since Paleocene (Pg1), as minimum), tectonics, metallogeny (including economic one), and maybe - hydrocarbons (HC, oil - gas) activity.
- Published
- 2019