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ISSN 2228-9860
eISSN 1906-9642
CODEN: ITJEA8
FEATURE PEER-REVIEWED ARTICLE
Vol.13(2) (2022) |
Mineral Geochemical Studies & Determination of Tectonomagmatic Environment of Triassic Basalt Rocks in Sartangeh Region in North Semnaan of Iran
Mehdi Zamani, Seyed Jamal Sheikh Zakariaei, Mohammad Reza Ansari (Department of Geology, Science and Research Branch, Islamic Azad University, Tehran, IRAN).
Disciplinary: Geology.
doi: 10.14456/ITJEMAST.2022.25
Keywords: Basalt, Mineral Geochemistry, Tectonomagmatic Environment, Semnan, Central Alborz, Iran
AbstractThe study area is Sartangeh Shahmizad, located in the north of Semnan and is part of Central Alborz in terms of construction geology. This area is anticline along the axis of west-northwest, east-southeast and the studied volcano is from the upper Triassic-Jurassic rock units with a definite boundary, and above is covered with a normal boundary by a sequence of sandstone, shale Shemshak formation. In line with the petrographic study, volcanic rocks in the study area are mainly basaltic igneous. Basalts with porphyric texture with microlytic paste to glass. Based on the chemistry of pyroxene mineral, basalt is in the range of alkaline to tholite rocks. Most basalt samples in the tectonic environment determination diagrams are based on the chemical composition of pyroxene and located in the range of the intercontinental rift environment and calc-alkaline magmas. With the help of the chemical composition of pyroxene, the temperature for the rocks of the region is estimated from about 500-1000 degrees Celsius at atmospheric pressure one. Moreover, with the help of the chemical composition of plagioclage, the basalt formation temperature of the region is estimated from about 650-750 degrees Celsius. In terms of mineral chemistry studies and the tectonic-magmatic environment diagrams, these rocks are within the in-sheet basalts range. Consistent with these findings, it can be concluded that the role of water-saturated asthenosphere ascent with amphibole garnet lerzolite has been significant for the formation of primary magma of volcanic basaltic rocks in the Sartangeh region. During this process, the impact of asthenosphere ascent and local tensions affected by impact zones is a factor to reduce pressure and a passage for Makma to reach the surface and the asthenosphere in the presence of high water has different melting degrees is part of an amphibious peridotite garnet source.Paper ID: 13A2D
Cite this article:
Zamani, M., Zakariaei , S. J. S., Ansari, M. R. (2022). Mineral Geochemical Studies & Determination of Tectonomagmatic Environment of Triassic Basalt Rocks in Sartangeh Region in North Semnaan of Iran. International Transaction Journal of Engineering, Management, & Applied Sciences & Technologies, 13(2), 13A2D, 1-11. http://TUENGR.COM/V13/13A2D.pdf DOI: 10.14456/ITJEMAST.2022.25
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