DATING AND SOURCE DETERMINATION OF VOLCANIC ROCKS FROM KHUNIK AREA (SOUTH OF BIRJAND, SOUTH KHORASAN) USING RB-SR AND SM-ND ISOTOPES

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SAMIEE SOMAYEH; KARIMPOUR MOHAMMAD HASSAN; GHADERI MAJID; HEIDARIAN SHAHRI MOHAMMAD REZA; FRANCISCO SANTOS JOSE

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Journal: PETROLOGY Year:2017 | Volume:7 | Issue:28 Page(s): 145-160

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Title

DATING AND SOURCE DETERMINATION OF VOLCANIC ROCKS FROM KHUNIK AREA (SOUTH OF BIRJAND, SOUTH KHORASAN) USING RB-SR AND SM-ND ISOTOPES

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Keywords

SR AND ND ISOTOPESQ1

GEOCHEMISTRYQ1

VOLCANIC ROCKSQ1

KHUNIKQ2

LUT BLOCKQ2

Abstract

The KHUNIK area is located in the south of Birjand, Khorasan province, in the eastern margin of LUT BLOCK. Tertiary VOLCANIC ROCKS have andesite to trachy-andesite composition. Dating analyzing by Rb-Sr method on plagioclase and hornblende as well as whole-rock isochron method was performed on pyroxene-hornblende andesite rock unit. On this basis the emplacement age is Upper Paleocene (58±11 Ma). These rocks have initial87Sr/86Sr and εNd 0.7046-0.7049 and 2.16-3.12, respectively. According to isotopic data, VOLCANIC ROCKS originated from depleted mantle and have the least crust contamination while it was fractionated. Geochemically, KHUNIK VOLCANIC ROCKS have features typical of calk-alkaline to shoshonite and are metaluminous. Enrichment in LILEs and typical negative anomalies of Nb and Ti are evidences that the VOLCANIC ROCKS formed in a subduction zone and active continental margin. Modeling suggests that these rocks were derived dominantly from 1–5% partial melting of a mainly spinel garnet lherzolite mantle source that is metasomatized by slab-derived fluid.

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APA: Copy

SAMIEE, SOMAYEH, KARIMPOUR, MOHAMMAD HASSAN, GHADERI, MAJID, HEIDARIAN SHAHRI, MOHAMMAD REZA, & FRANCISCO SANTOS, JOSE. (2017). DATING AND SOURCE DETERMINATION OF VOLCANIC ROCKS FROM KHUNIK AREA (SOUTH OF BIRJAND, SOUTH KHORASAN) USING RB-SR AND SM-ND ISOTOPES. PETROLOGY, 7(28 ), 145-160. SID. https://sid.ir/paper/197059/en

Vancouver: Copy

SAMIEE SOMAYEH, KARIMPOUR MOHAMMAD HASSAN, GHADERI MAJID, HEIDARIAN SHAHRI MOHAMMAD REZA, FRANCISCO SANTOS JOSE. DATING AND SOURCE DETERMINATION OF VOLCANIC ROCKS FROM KHUNIK AREA (SOUTH OF BIRJAND, SOUTH KHORASAN) USING RB-SR AND SM-ND ISOTOPES. PETROLOGY[Internet]. 2017;7(28 ):145-160. Available from: https://sid.ir/paper/197059/en

IEEE: Copy

SOMAYEH SAMIEE, MOHAMMAD HASSAN KARIMPOUR, MAJID GHADERI, MOHAMMAD REZA HEIDARIAN SHAHRI, and JOSE FRANCISCO SANTOS, “DATING AND SOURCE DETERMINATION OF VOLCANIC ROCKS FROM KHUNIK AREA (SOUTH OF BIRJAND, SOUTH KHORASAN) USING RB-SR AND SM-ND ISOTOPES,” PETROLOGY, vol. 7, no. 28 , pp. 145–160, 2017, [Online]. Available: https://sid.ir/paper/197059/en

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