GEOCHEMISTRY AND PETROGENISIS OF TERISHKUH VOLCANIC ROCKS LOCATED AT NORTH OF SHAHR BABAK (KERMAN-IRAN)

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POURSHABAN MAZANDARANI ELHAM; KHALILI MOBARHAN SHAHRAM

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Journal: GEOCHEMISTRY Year:2016 | Volume:4 | Issue:4 Page(s): 359-373

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Title

GEOCHEMISTRY AND PETROGENISIS OF TERISHKUH VOLCANIC ROCKS LOCATED AT NORTH OF SHAHR BABAK (KERMAN-IRAN)

Author(s)

POURSHABAN MAZANDARANI ELHAM | KHALILI MOBARHAN SHAHRAM | Issue Writer Certificate

Keywords

ACTIVE CONTINENTAL MARGINQ2

MAGMATIC ARCQ2

TERISHKUHQ2

URMIA-DOKHTARQ2

VOLCANIC ROCKSQ2

Abstract

Volcanic products of the TERISHKUH area belong to the Kerman Cenozoic MAGMATIC ARC (Dehaj-Sarduyeh belt) and they are located at the southern part of the URMIA-DOKHTAR volcanic belt. The Eocene andesite-basalt volcanic units lie on these rocks. Lithological composition of the lower part of the TERISHKUH area contains sequence of trachybasalt with hyaloporphyritic, microlitic porphytic, glomroporphyritic texture and pyroclatics.With increasing the altitude, lava flows are eliminated and volcanic activities are appeared as fissure eruption and dikes. The composition of dikes is basaltic-andesite and trachyandesite and most of them have porphyry microlithic texture. Due to the rapid ascent of magma, dikes and lava flows show contamination and mixing processes since some evidence is observed of non-equilibrium crystallization conditions in the magma, such as oscillatory zoning or sieve texture in plagioclases. Pyroclastic products are varied and include brecciated pyroclastics, ignimberites, crystal tuffs and volcanic ash. Spherolithic, eutaxitic, and amygdaloidal textures are found in these deposits. The lithological classification of samples on the TAS diagram shows wide compositional range from basalt to rhyolite belonging to the moderate to high potassium calc-alkaline series. Studied rocks show meta-aluminous affinity and they show more enrichment of LREE and LILE than HREE and HFSE. This element distribution model is characteristic of subduction-related rocks or the rocks that are contaminated by upper crust. Fractional crystallization and enrichment of a fluid played a significant role. Based on the above facts, low MgO content of rhyolitic and trachy basaltic rocks and also negative anomaly of P, it is suggested that acidic lavas probably derived from basaltic lavas. As a result, this complex has been developed in a MAGMATIC ARC belonging to an ACTIVE CONTINENTAL MARGIN environment.

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APA: Copy

POURSHABAN MAZANDARANI, ELHAM, & KHALILI MOBARHAN, SHAHRAM. (2016). GEOCHEMISTRY AND PETROGENISIS OF TERISHKUH VOLCANIC ROCKS LOCATED AT NORTH OF SHAHR BABAK (KERMAN-IRAN). GEOCHEMISTRY, 4(4), 359-373. SID. https://sid.ir/paper/230865/en

Vancouver: Copy

POURSHABAN MAZANDARANI ELHAM, KHALILI MOBARHAN SHAHRAM. GEOCHEMISTRY AND PETROGENISIS OF TERISHKUH VOLCANIC ROCKS LOCATED AT NORTH OF SHAHR BABAK (KERMAN-IRAN). GEOCHEMISTRY[Internet]. 2016;4(4):359-373. Available from: https://sid.ir/paper/230865/en

IEEE: Copy

ELHAM POURSHABAN MAZANDARANI, and SHAHRAM KHALILI MOBARHAN, “GEOCHEMISTRY AND PETROGENISIS OF TERISHKUH VOLCANIC ROCKS LOCATED AT NORTH OF SHAHR BABAK (KERMAN-IRAN),” GEOCHEMISTRY, vol. 4, no. 4, pp. 359–373, 2016, [Online]. Available: https://sid.ir/paper/230865/en

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