Geochemistry and tectonic setting of Tertiary lavas in Abbas Abad area(Northeast of Sarbisheh), Southern Khorasan

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ABAZARI M.; MOHAMMADI S.S.; NAKHAEI M.

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Journal: GEOSCIENCES Year:2020 | Volume:29 | Issue:114 Page(s): 41-50

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Title

Geochemistry and tectonic setting of Tertiary lavas in Abbas Abad area(Northeast of Sarbisheh), Southern Khorasan

Author(s)

ABAZARI M. | MOHAMMADI S.S. | NAKHAEI M. | Issue Writer Certificate

Keywords

AndesiteQ1

Calc alkalineQ2

Active continental marginQ2

Abbas AbadQ2

Sistan suture zoneQ1

Abstract

Abbas Abad area is located in the northeast of Sarbisheh, in the northern part of Sistan suture zone and southern Khorasan province. In this area, Tertiary volcanic rocks with the composition of intermediate to acid, including basaltic Andesite, Andesite, and dacite are exposed. Constructive minerals of basaltic Andesite include of plagioclase, pyroxene and olivine and in Andesite consist of plagioclase, hornblende and pyroxene, and in dacite are plagioclase, quartz, biotite and hornblende. The studied rocks have medium to high-K calc-alkaline nature. Most samples show enrichment in LILEs (K, Rb, Sr, Cs) (except Ba) relative to HFSEs (Y, P, Ti, Ta, Nb), which indicates the relation of these rocks to subduction zone and Active continental margin. The relatively low (La/Yb)N (7. 67 to 13. 48) and Dy/Yb (<2) in Abbas Abad lavas indicate that partial melting of mantle occurred in transitional zone of spinel-garnet lherzolite. Based on the concentration of trace elements such as Ce, Yb and Sm, magma originated from a depth of about 95 to 105 kilometers.

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APA: Copy

ABAZARI, M., MOHAMMADI, S.S., & NAKHAEI, M.. (2020). Geochemistry and tectonic setting of Tertiary lavas in Abbas Abad area(Northeast of Sarbisheh), Southern Khorasan. GEOSCIENCES, 29(114 ), 41-50. SID. https://sid.ir/paper/31523/en

Vancouver: Copy

ABAZARI M., MOHAMMADI S.S., NAKHAEI M.. Geochemistry and tectonic setting of Tertiary lavas in Abbas Abad area(Northeast of Sarbisheh), Southern Khorasan. GEOSCIENCES[Internet]. 2020;29(114 ):41-50. Available from: https://sid.ir/paper/31523/en

IEEE: Copy

M. ABAZARI, S.S. MOHAMMADI, and M. NAKHAEI, “Geochemistry and tectonic setting of Tertiary lavas in Abbas Abad area(Northeast of Sarbisheh), Southern Khorasan,” GEOSCIENCES, vol. 29, no. 114 , pp. 41–50, 2020, [Online]. Available: https://sid.ir/paper/31523/en

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