TITLE:
Mineral Chemistry and Thermobarometry of the Volcanic Rocks in Torud, Iran
AUTHORS:
Elham Shah Hosseini, Afshin Ashja Ardalan, Mohammad Hashem Emami, Mohammad Hossein Razavi
KEYWORDS:
Volcanic Rocks, Mineral Chemistry, Clinopyroxenes, Plagioclase, Torud
JOURNAL NAME:
Open Journal of Geology,
Vol.4 No.9,
September
12,
2014
ABSTRACT: This paper elucidates the
compositional studies on clinopyroxene, plagioclase of basalts to andesitic
rocks of Torud area to understand the geotectonic and geothermobarometry
conditions.EarlyEocene-Oligocene calc-alkaline
volcanic rocks are exposed around Torud in the Central Iranian zone. Volcanic
rocks consist of basaltic, andesite basalt, Tracyandesite, and andesite.
Minerals in the volcanic rocks exhibit degrees of disequilibrium features.
Plagioclase as dominant mineral in these rocks generally displays oscillatory
zoning. Mineral chemistry studies show that clinopyroxenes in the volcanic
rocks are diopside, augite and plotted in medium pressure field. The
clinopyroxene composition yields the crystallization temperatures 900°C- 1000°C. The mineral composition
indicates that these rocks are formed in a tensional environment.