Thermobarometry and tectonic setting of Gasht-e-Rudkhan metapelites, Gasht metamorphic complex, west of Rasht

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RAZAGHI S.; NASRABADY M.; GHOLIZADEH K.; DAVOUDI Z.

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Journal: GEOSCIENCES Year:2018 | Volume:27 | Issue:108 Page(s): 269-280

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Information Journal Paper

Title

Thermobarometry and tectonic setting of Gasht-e-Rudkhan metapelites, Gasht metamorphic complex, west of Rasht

Author(s)

RAZAGHI S. | NASRABADY M. | GHOLIZADEH K. | DAVOUDI Z. | Issue Writer Certificate

Keywords

MetapeliteQ2

MigmatiteQ1

Partial meltingQ1

LeucograniteQ1

ThermobarometryQ1

Gasht-e-RodkhanQ1

Abstract

The Gash metamorphic complex is situated at the west of Rasht city. Gasht-e-Rodkhan metamorphic rocks are considered as a part of this metamorphic complex. Metapelites (schist, gneiss and Migmatite) are the most important lithological unit of the Gasht-e-Rodkhan area. Index minerals consist of staurolite, garnet, sillimanite and kyanite. The main rock forming minerals of muscovite-free melanosome of Migmatites are sillimanite and biotite. There is garnet in some melanosome as well. Quartz, K-feldspar and plagioclase are the rock forming minerals of leucosome. Tourmaline, garnet, muscovite and sillimanite are accessory minerals. Average pressure and temperature calculated by Thermocalc software and conventional thermobarometers for schist, gneiss and Migmatite samples are 8. 6 Kb, 630° C; 6. 7 Kb, 650° C and 6. 3 Kb, 720° C respectively. Mineralogical parageneses and geothermal gradient resulted from Thermobarometry calculations of the Gasht-e-Rodkhan Metapelites are compatible with metamorphic Barrovian gradient or orogenic type. Gash complex probably represents metamorphic rocks of medium crustal depth of a collisional tectonic setting between Alborz block and Turan plate. Partial melting of Metapelites and generation of associated Leucogranites have taken place as a consequence of muscovite dehydration melting.

Cites

Tourmaline genesis in the metamorphic and magmatic rocks of Gasht-e-Rudkhan district (Gasht metamorphic Complex, West of Rasht)

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APA: Copy

RAZAGHI, S., NASRABADY, M., GHOLIZADEH, K., & DAVOUDI, Z.. (2018). Thermobarometry and tectonic setting of Gasht-e-Rudkhan metapelites, Gasht metamorphic complex, west of Rasht. GEOSCIENCES, 27(108 ), 269-280. SID. https://sid.ir/paper/32541/en

Vancouver: Copy

RAZAGHI S., NASRABADY M., GHOLIZADEH K., DAVOUDI Z.. Thermobarometry and tectonic setting of Gasht-e-Rudkhan metapelites, Gasht metamorphic complex, west of Rasht. GEOSCIENCES[Internet]. 2018;27(108 ):269-280. Available from: https://sid.ir/paper/32541/en

IEEE: Copy

S. RAZAGHI, M. NASRABADY, K. GHOLIZADEH, and Z. DAVOUDI, “Thermobarometry and tectonic setting of Gasht-e-Rudkhan metapelites, Gasht metamorphic complex, west of Rasht,” GEOSCIENCES, vol. 27, no. 108 , pp. 269–280, 2018, [Online]. Available: https://sid.ir/paper/32541/en

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