Garmichay metapelites, NW Iran: whole rock chemistry, provenance and metamorphic conditions

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MAHAMED A.; MOAYYED M.; MODJARRAD M.

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Journal: Iranian Journal of Geology Year:2021 | Volume:15 | Issue:57 Page(s): 59-85

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Title

Garmichay metapelites, NW Iran: whole rock chemistry, provenance and metamorphic conditions

Author(s)

MAHAMED A. | MOAYYED M. | MODJARRAD M. | Issue Writer Certificate

Keywords

PetrofabricsQ1

ProvenanceQ2

GeochemistryQ1

GarmichayQ1

MetapeliteQ2

Abstract

The whole rock chemistry of the Garmichay Metapelites located in the north of Miyaneh, NW Iran, is investigated to reveal the Provenance and metamorphic conditions of the rocks. Petrofabric observations have revealed the syn-tectonic nature of regional metamorphic cordierite porphyroblasts in the Metapelites. C' shear band structure is another feature that is observed in the rocks. Two regional metamorphic phases (RMP1, RMP2), one contact metamorphic phase (CMP) and two deformation (D1, D2) phases are identified. The major oxide Geochemistry implies two sedimentary shale and greywacke parent rocks. Based on major, rare earth and trace elements (Ti, Ni, TiO2, Zr and K2O) the igneous source rock has been an andesite to dacite/rhyodacite. The CIA (chemical index of alteration) and CIW (chemical index of weathering) parameters imply a medium degree of alteration in the igneous source area. The Garmichay Metapelites, in comparison with the PAAS and UCC, are enriched in Cs, La and Ce and depleted in Sr, Nb and Ta. The representative samples lie inside the paragenetic triangles of the compatibility diagrams that imply their thermodynamically stable conditions. Finally, based on the standard pseudosections, the maximum temperature and pressure range has been determined as 535-635 ° C and 1-3 kb, respectively.

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APA: Copy

MAHAMED, A., MOAYYED, M., & MODJARRAD, M.. (2021). Garmichay metapelites, NW Iran: whole rock chemistry, provenance and metamorphic conditions. IRANIAN JOURNAL OF GEOLOGY, 15(57 ), 59-85. SID. https://sid.ir/paper/405389/en

Vancouver: Copy

MAHAMED A., MOAYYED M., MODJARRAD M.. Garmichay metapelites, NW Iran: whole rock chemistry, provenance and metamorphic conditions. IRANIAN JOURNAL OF GEOLOGY[Internet]. 2021;15(57 ):59-85. Available from: https://sid.ir/paper/405389/en

IEEE: Copy

A. MAHAMED, M. MOAYYED, and M. MODJARRAD, “Garmichay metapelites, NW Iran: whole rock chemistry, provenance and metamorphic conditions,” IRANIAN JOURNAL OF GEOLOGY, vol. 15, no. 57 , pp. 59–85, 2021, [Online]. Available: https://sid.ir/paper/405389/en

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