GARNET-AMPHIBOLITES MINERALOGY AND THERMOBAROMETRY IN ALIABAD-DAMAGH (SOUTH OF HAMEDAN, SANANDAJ-SIRJAN ZONE)

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BAHARIFAR ALI AKBAR; PANG KWAN NANG; CHUNG SUN LIN; IIZUKA YOSHIYUKI

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Journal: PETROLOGY Year:2017 | Volume:8 | Issue:31 Page(s): 1-20

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Title

GARNET-AMPHIBOLITES MINERALOGY AND THERMOBAROMETRY IN ALIABAD-DAMAGH (SOUTH OF HAMEDAN, SANANDAJ-SIRJAN ZONE)

Author(s)

BAHARIFAR ALI AKBAR | PANG KWAN NANG | CHUNG SUN LIN | IIZUKA YOSHIYUKI | Issue Writer Certificate

Keywords

GARNET-AMPHIBOLITEQ1

MINERALOGYQ2

THERMOBAROMETRYQ3

ALIABAD-DAMAGHQ2

HAMEDANQ2

SANANDAJ-SIRJANQ1

IRANQ2

Abstract

The GARNET-AMPHIBOLITEs in ALIABAD-DAMAGH area, occurs as layers and are enveloped by staurolite-schist. They composed predominantly of garnet, hornblende, feldspar (± muscovite and quartz) with titanite, epidote, ilmenite and graphite as accessory minerals. The euhedral garnet porphyroblasts mainly composed of almandine and grossular components, with normal compositional zoning. The hornblende crystals as prophyroblast or in the matrix, are magnesio- and ferro-hornblende (amphibole core) to tchermakitic-hornbelende (amphibole rim) in composition. Muscovites, if present, with minor phengite and paragonite components, are foliated forming minerals. Feldspars vary from pure K-feldspar to sanidine composition in the vicinity of hornblendes and oligoclase in matrix. Epidotes as pure clinozoisite to epidote, form small crystals inside hornblende or in the matrix. Using different THERMOBAROMETRY methods, T and P estimated as 600-620 (± 25) oC and 5-6 (± 1) kbar, respectively. Calculated P-T-t path, considering core and rim composition of hornblendes, is in accordance with low-pressure (at the beginning of metamorphism) to medium-pressure type (at the end). Considering P-T-t path, metamorphism could occur during Neo-Tethys subduction and collision process in the Mesozoic time

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APA: Copy

BAHARIFAR, ALI AKBAR, PANG, KWAN NANG, CHUNG, SUN LIN, & IIZUKA, YOSHIYUKI. (2017). GARNET-AMPHIBOLITES MINERALOGY AND THERMOBAROMETRY IN ALIABAD-DAMAGH (SOUTH OF HAMEDAN, SANANDAJ-SIRJAN ZONE). PETROLOGY, 8(31 ), 1-20. SID. https://sid.ir/paper/197009/en

Vancouver: Copy

BAHARIFAR ALI AKBAR, PANG KWAN NANG, CHUNG SUN LIN, IIZUKA YOSHIYUKI. GARNET-AMPHIBOLITES MINERALOGY AND THERMOBAROMETRY IN ALIABAD-DAMAGH (SOUTH OF HAMEDAN, SANANDAJ-SIRJAN ZONE). PETROLOGY[Internet]. 2017;8(31 ):1-20. Available from: https://sid.ir/paper/197009/en

IEEE: Copy

ALI AKBAR BAHARIFAR, KWAN NANG PANG, SUN LIN CHUNG, and YOSHIYUKI IIZUKA, “GARNET-AMPHIBOLITES MINERALOGY AND THERMOBAROMETRY IN ALIABAD-DAMAGH (SOUTH OF HAMEDAN, SANANDAJ-SIRJAN ZONE),” PETROLOGY, vol. 8, no. 31 , pp. 1–20, 2017, [Online]. Available: https://sid.ir/paper/197009/en

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