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Type: Journal article
Title: Mineralogical evidence for regional metamorphism overprinted by contact metamorphism
Author: Badr, M.
Masoudi, F.
Collins, A.
Sorbi, A.
Citation: Acta Geologica Sinica, 2012; 86(1):48-64
Publisher: Geological Soc China
Issue Date: 2012
ISSN: 1000-9515
Statement of
Mahboobeh Jamshidi Badr, Fariborz Masoudi, Alan S. Collins and Ali Sorbi
Abstract: The Soursat metamorphic complex (SMC) in northwestern Iran is part of the Sanandaj–Sirjan metamorphic belt. The complex is composed of different metamorphic and plutonic rocks, but is dominated by metapelites composed of garnet, staurolite, kyanite, fibrolite, cordierite, and andalusite. Porphyroblasts in schists have the same fabric, and three stages of schistosity are present. The internal schistosity (Sn) inclusion trails are also offset by conjugate sets of extensional schistosity (Sn+1) and a second (Sn+2) that crenulates (Sn+1). Polyphase metamorphisms are present in the complex. Garnet, staurolite, kyanite, and fibrolite assemblage preserves conditions during the M1 metamorphic event. This assemblage yields a P–t estimate of 645±11°C and 6.5±0.5 kbar. Other samples of the central part of SMC contain cordierite and andalusite (M2) overgrowth that yields a P–t estimate of 532±33°C and 2.1±1.1 kbar.
Keywords: metamorphism
north-west Iran
Sanandaj-Sirjan zone
Soursat metamorphic complex.
Rights: © 2012 Geological Society of China
DOI: 10.1111/j.1755-6724.2012.00610.x
Appears in Collections:Aurora harvest 5
Geology & Geophysics publications

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