Structural investigation of ductile deformation in metamorphic rocks around the Anarak-Central Iran

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KHALAJ MOHAMMAD

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Journal: GEOSCIENCES Year:2020 | Volume:30 | Issue:117 Page(s): 101-110

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Title

Structural investigation of ductile deformation in metamorphic rocks around the Anarak-Central Iran

Author(s)

KHALAJ MOHAMMAD | Issue Writer Certificate

Keywords

Anarak metamorphic rocksQ1

Deformational phasesQ1

Central IranQ2

Accretionary wadgeQ1

Variscan eventQ1

Abstract

Anarak metamorphic complex located east of Nain city. Based on geological, chronological and paleomagnetical data, the complex consists of different metamorphic units from different varity of source. This metamorphic complex also composed of ophiolitic bodies which crop out in the complex as thrust sheets. This study is concerned with structural investigation of metamorphic rocks around Anarak, specially on a Z shape folding in the chahgorbeh mountains. Based on field surveys and microscopic investigations there are at least 3 deformationnal phases in the morghab and chahgorbeh units, all of them occurred in ductile conditions possibly related to “ Variscan metamorphism” (late carboniferous). In the basic and ultramafic rocks of chahgorbeh unit, the first deformational phase accompanied with HP/LT metamorphic conditions at amphibolite facies. This phase is accompanied with a relatively low grade metamorphism-green schist facies in the metamorphic pelletic rocks of Morghab and Chahgorbeh units and leads to generation of a low grade (S1) foliation. This phase followed by increasing of intensity of deformation and milonitic foliation and sheath folds developed in the rock units through second phase of deformation. Third phase of deformation continusly affected the pre-deformed rocks in a more low-grade metamorphic and deformational condition than earlier phases.

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APA: Copy

KHALAJ, MOHAMMAD. (2020). Structural investigation of ductile deformation in metamorphic rocks around the Anarak-Central Iran. GEOSCIENCES, 30(117 ), 101-110. SID. https://sid.ir/paper/408927/en

Vancouver: Copy

KHALAJ MOHAMMAD. Structural investigation of ductile deformation in metamorphic rocks around the Anarak-Central Iran. GEOSCIENCES[Internet]. 2020;30(117 ):101-110. Available from: https://sid.ir/paper/408927/en

IEEE: Copy

MOHAMMAD KHALAJ, “Structural investigation of ductile deformation in metamorphic rocks around the Anarak-Central Iran,” GEOSCIENCES, vol. 30, no. 117 , pp. 101–110, 2020, [Online]. Available: https://sid.ir/paper/408927/en

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