GEOCHEMISTRY AND PETROGENESIS OF VOLCANIC ROCKS IN NORTH-EAST OF ARDESTAN

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SHAHZEYDI M.; MOAYYED M.; MOAZZEN M.; AHMADIAN J.

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Journal: RESEARCH JOURNAL OF UNIVERSITY OF ISFAHAN "SCIENCE" Year:2008 | Volume:30 | Issue:1 (GEOLOGY) Page(s): 29-50

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Title

GEOCHEMISTRY AND PETROGENESIS OF VOLCANIC ROCKS IN NORTH-EAST OF ARDESTAN

Author(s)

SHAHZEYDI M. | MOAYYED M. | MOAZZEN M. | AHMADIAN J. | Issue Writer Certificate

Keywords

GEOCHEMISTRYQ3

VOLCANIC ARCQ3

PYROCLASTICSQ3

ARDESTENQ3

METASOMATIZED MANTLEQ3

Abstract

The studied area is located in 110 Km north-east of Ardestan in Isfahan province and, in Iran's geological classification, it lies in the central Iran zone. This collection consists of intermittent of lava flows (mainly basaltic andesite, andesite, dacite, rhyodacite and rhyolite) and PYROCLASTICS (tuff, ignimbrite and agglomerate). These lavas are composed essentially of quartz, plagioclase, kfeldspar, amphibole, biotite, clinopyroxene and olivine, set in a matrix of the same minerals associated with apatite, zircon and opaque mineral. The study of volcanic rocks shows a selective enrichment of large ion lithophile elements (eg., K, Rb, Ba) and a depletion in elements having high field strength (HFSE) as Nb, Ti, Ta compared to chondrites and primitive mantle. Based on the geochemical data, trace and REE element diagrams, these rocks are high potassium calc-alkaline and shoshonite. Trace element patterns show similarities with VOLCANIC ARC magma. Therefore, volcanic rocks of north-east of ARDESTEN are products of volcanism of METASOMATIZED MANTLE.

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APA: Copy

SHAHZEYDI, M., MOAYYED, M., MOAZZEN, M., & AHMADIAN, J.. (2008). GEOCHEMISTRY AND PETROGENESIS OF VOLCANIC ROCKS IN NORTH-EAST OF ARDESTAN. RESEARCH JOURNAL OF UNIVERSITY OF ISFAHAN "SCIENCE", 30(1 (GEOLOGY)), 29-50. SID. https://sid.ir/paper/56012/en

Vancouver: Copy

SHAHZEYDI M., MOAYYED M., MOAZZEN M., AHMADIAN J.. GEOCHEMISTRY AND PETROGENESIS OF VOLCANIC ROCKS IN NORTH-EAST OF ARDESTAN. RESEARCH JOURNAL OF UNIVERSITY OF ISFAHAN "SCIENCE"[Internet]. 2008;30(1 (GEOLOGY)):29-50. Available from: https://sid.ir/paper/56012/en

IEEE: Copy

M. SHAHZEYDI, M. MOAYYED, M. MOAZZEN, and J. AHMADIAN, “GEOCHEMISTRY AND PETROGENESIS OF VOLCANIC ROCKS IN NORTH-EAST OF ARDESTAN,” RESEARCH JOURNAL OF UNIVERSITY OF ISFAHAN "SCIENCE", vol. 30, no. 1 (GEOLOGY), pp. 29–50, 2008, [Online]. Available: https://sid.ir/paper/56012/en

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