Mineral Chemistry and Thermobarometry of the Volcanic Rocks in Torud, Iran

• 作者: Afshin Ashja Ardalan Elham Shah Hosseini Mohammad Hashem Emami Mohammad Hossein Razavi
• 来源期刊: 地质学期刊(英文)
• 学科: 地球科学
• 关键词: VOLCANIC Rocks Mineral Chemistry CLINOPYROXENES PLAGIOCLASE Torud
• 年，卷（期）: 2014,（9）
• 页码范围: 425-435
• 页数: 11页
• 分类号: P5

摘要

This paper elucidates the compositional studies on clinopyroxene, plagioclase of basalts to andesitic rocks of Torud area to understand the geotectonic and geothermobarometry conditions.?Early?Eocene-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.