DEFORMATION MICROSTRUCTURES AND CONDITIONS IN MUTEH-GOLPAYEGAN METAMORPHIC CORE COMPLEXES

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MOOSAVI E.; MOHAJJEL M.

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Journal: GEOSCIENCES Year:2015 | Volume:24 | Issue:96 Page(s): 33-40

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Information Journal Paper

Title

DEFORMATION MICROSTRUCTURES AND CONDITIONS IN MUTEH-GOLPAYEGAN METAMORPHIC CORE COMPLEXES

Author(s)

MOOSAVI E. | MOHAJJEL M. | Issue Writer Certificate

Keywords

MICROSTRUCTUREQ2

DEFORMATIONQ2

MUTEHQ3

GOLPAYEGANQ2

Abstract

Two main regional metamorphic events have occurred within MUTEH-Golpayegan metamorphic core complexes (including eastern and western complexes) in the Sanandaj-Sirjan zone. Also, some grain-scale DEFORMATIONs happened in relation to these metamorphisms which have produced various DEFORMATION MICROSTRUCTUREs. Microfaults are among the MICROSTRUCTUREs that were formed during brittle conditions. In the eastern complex, bulging recrystallization of quartz and rarely feldspar grains, along with the bookshelf structure of the fragmented feldspar porphyroclasts indicate various DEFORMATION and formation of shear zones under low-temperature conditions. Polygonal granoblastic texture of polycrystalline quartz porphyroclasts documents post-mylonitization annealing at medium-grade conditions in the shear zones of the eastern complex. Chessboard pattern quartz subgrains propose high-grade metamorphic conditions during the first DEFORMATION. However, their undulatory extinction reveals low-grade conditions during the second DEFORMATION. Polygonal granoblastic texture of chevron folded feldspar grains also exactly supports these conditions during the two mentioned DEFORMATIONs. In general, considering DEFORMATION MICROSTRUCTUREs and conditions, three stages of recrystallization are respectively recognizable in the MUTEH-Golpayegan metamorphic complexes including: 1- highgrade static recrystallization subsequent to early metamorphic event, 2- dynamic recrystallization and related mylonitization under low-grade to locally medium-grade conditions, 3-post-mylonitization static recrystallization in medium-grade conditions. The north GOLPAYEGAN granitoid bodies can be considered as the heat source of annealing in the metamorphic rocks for the western complex but the cause of annealing is not evident in the eastern complex.

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APA: Copy

MOOSAVI, E., & MOHAJJEL, M.. (2015). DEFORMATION MICROSTRUCTURES AND CONDITIONS IN MUTEH-GOLPAYEGAN METAMORPHIC CORE COMPLEXES. GEOSCIENCES, 24(96), 33-40. SID. https://sid.ir/paper/32496/en

Vancouver: Copy

MOOSAVI E., MOHAJJEL M.. DEFORMATION MICROSTRUCTURES AND CONDITIONS IN MUTEH-GOLPAYEGAN METAMORPHIC CORE COMPLEXES. GEOSCIENCES[Internet]. 2015;24(96):33-40. Available from: https://sid.ir/paper/32496/en

IEEE: Copy

E. MOOSAVI, and M. MOHAJJEL, “DEFORMATION MICROSTRUCTURES AND CONDITIONS IN MUTEH-GOLPAYEGAN METAMORPHIC CORE COMPLEXES,” GEOSCIENCES, vol. 24, no. 96, pp. 33–40, 2015, [Online]. Available: https://sid.ir/paper/32496/en

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