Geochemical characteristics and petrogenesis of volcanic rocks from Kule sangi– Malek Siah Kuh complex, North of Zahedan, Eastern Iran

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BAHJATI M.; AHMADI A.; BIABANGARD H.

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Journal: GEOSCIENCES Year:2020 | Volume:29 | Issue:114 Page(s): 61-72

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Information Journal Paper

Title

Geochemical characteristics and petrogenesis of volcanic rocks from Kule sangi– Malek Siah Kuh complex, North of Zahedan, Eastern Iran

Author(s)

BAHJATI M. | AHMADI A. | BIABANGARD H. | Issue Writer Certificate

Keywords

GeochemistryQ1

PetrogenesisQ2

Kule Sangi-Malek Siah KuhQ1

North of ZahedanQ1

Eastern IranQ1

Abstract

The volcanic rocks of Kuleh sangi-Malek siah kuh igneous complex consist of alkali basalt, basalt, basaltic andesite, andesite, dacite and trachyte. In the SiO2 versus K2O diagram, the basaltic samples are plotted in the shoshonitic field and the subalkaline samples are plotted in the medium K calc alkaline series field. The average La/Yb, Rb/Zr and Cs/Hf ratios in basalts are 7, 47 and 63 times those of N-MORB, respectively. Considerable enrichment of LILEs, LREEs and relative depletion of HREEs indicate that the magmas originated from a mantle source more enriched than that of OIB, where phlogopite and garnet are stable. Using non-modal batch melting model, the compositions of the mafic samples are mainly consistent with about 5% melting of a phlogopite-bearing and garnet-bearing lherzolite with a mixture of about 80% and 20%, respectively. AFC models using Pb versus Ce/Pb and Rb versus K/Rb show that the fractionated samples have undergone simultaneous crustal assimilation and fractional crystallization. It seems that the assimilation and the fractionation had been taken place with the same rate. Depletion in Y and elevated ratio of Sr/Y of fractionated rocks in addition to Rb/Nb ratio more than 8, could be considered as evidence for crustal assimilation.

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APA: Copy

BAHJATI, M., AHMADI, A., & BIABANGARD, H.. (2020). Geochemical characteristics and petrogenesis of volcanic rocks from Kule sangi– Malek Siah Kuh complex, North of Zahedan, Eastern Iran. GEOSCIENCES, 29(114 ), 61-72. SID. https://sid.ir/paper/31503/en

Vancouver: Copy

BAHJATI M., AHMADI A., BIABANGARD H.. Geochemical characteristics and petrogenesis of volcanic rocks from Kule sangi– Malek Siah Kuh complex, North of Zahedan, Eastern Iran. GEOSCIENCES[Internet]. 2020;29(114 ):61-72. Available from: https://sid.ir/paper/31503/en

IEEE: Copy

M. BAHJATI, A. AHMADI, and H. BIABANGARD, “Geochemical characteristics and petrogenesis of volcanic rocks from Kule sangi– Malek Siah Kuh complex, North of Zahedan, Eastern Iran,” GEOSCIENCES, vol. 29, no. 114 , pp. 61–72, 2020, [Online]. Available: https://sid.ir/paper/31503/en

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