نتایج جستجو برای: rhyolite

تعداد نتایج: 435  

شاهزیدی, ملیحه, احمدیان, جمشید, مؤذن, محسن, مؤید, محسن,

The studied area is located in the north-east of Ardestan in Isfahan province. In Iran’s geological classification it lies in the central Iran zone. The volcanic rocks of the Kuh-e Dom area are predominantly rhyolite, rhyodacite, dacite, tuff, ignimbrite, andesite, banakite and basaltic-andesite. The major rock–forming minerals are quartz, plagioclase, alkali feldspar (orthoclase, albite), amph...

Journal: :International Journal of Earth Sciences 2022

Abstract The Altenberg–Teplice Volcanic Complex (ATVC) is a large ~ NNW–SSE trending volcano-plutonic system in the southern part of Eastern Erzgebirge (northern Bohemian Massif, south-eastern Germany and northern Czech Republic). This study presents high precision U–Pb CA-ID-TIMS zircon ages for pre-caldera volcano-sedimentary Schönfeld–Altenberg various rocks caldera stage: Teplice rhyolite, ...

2007

A rhyolite glass containing about 300 ppm by weight of H'O was heated in a microscope heating stage to 1300 oC, and true infrared absorbance spectra were obtained in situ at various temperatures using an FTIR spectrometer, together with the focusing optics of an IR microscope. Virtually all HrO dissolved as OH at all temperatures. However, large changes both in band shape and integral extinctio...

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