Investigate the partial melting process in Hornblend bearing migmatites with Ghar-Naz, northwestern Iran

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GHORBANI HALEH; HAJIALIOGHLI ROBAB; MOAZZEN MOHSEN

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Journal: GEOSCIENCES Year:2020 | Volume:30 | Issue:117 Page(s): 25-38

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Title

Investigate the partial melting process in Hornblend bearing migmatites with Ghar-Naz, northwestern Iran

Author(s)

GHORBANI HALEH | HAJIALIOGHLI ROBAB | MOAZZEN MOHSEN | Issue Writer Certificate

Keywords

Ghareh naz migmatitesQ1

Mass balance calculationsQ1

Migmatite structuresQ1

Percentage of partial meltingQ1

Abstract

The Ghareh naz migmatites were formed as a result of partial melting of amphibolites under granulite facies conditions. Structeral, textural, mineralogical and geochemical evidence in the migmatites migmatites indicates their formation via partial melting during partial melting. The studied migmatites have a variety of structures including patchy, scholen, ophthalmitic, stromatic, diktyonitic, ptygmatic, phlebetic, schliren, pegmatitoid and nebulitic. The presence of striated plagioclases and amorphous quartzes along with granular texture, myrmecite and peritite in the locosome parts as well as the presence of zoning, polysynthetic twin in the plagioclases indicate a partial melting role in the formation of migmatites. Based on Mass balance calculations in the Ghareh naz migmatites, the parts of the migmatite components of the locosome, melanosome, and mesosome are aligned in a straight line, indicating a partial melting source of the studied migmatites. The Percentage of partial melting for the studied megmatites was calculated to be about 36. 5% and 43. 6%, respectively. The difference in partial melting percentages may depend on the relationship between the rate and melt outflow and to a small extent on the amount of melt in the region. The formation temperature of these migmatites is determinated about 850-850 ° C and the pressure is about 6-7 kbar.

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APA: Copy

GHORBANI, HALEH, HAJIALIOGHLI, ROBAB, & MOAZZEN, MOHSEN. (2020). Investigate the partial melting process in Hornblend bearing migmatites with Ghar-Naz, northwestern Iran. GEOSCIENCES, 30(117 ), 25-38. SID. https://sid.ir/paper/399799/en

Vancouver: Copy

GHORBANI HALEH, HAJIALIOGHLI ROBAB, MOAZZEN MOHSEN. Investigate the partial melting process in Hornblend bearing migmatites with Ghar-Naz, northwestern Iran. GEOSCIENCES[Internet]. 2020;30(117 ):25-38. Available from: https://sid.ir/paper/399799/en

IEEE: Copy

HALEH GHORBANI, ROBAB HAJIALIOGHLI, and MOHSEN MOAZZEN, “Investigate the partial melting process in Hornblend bearing migmatites with Ghar-Naz, northwestern Iran,” GEOSCIENCES, vol. 30, no. 117 , pp. 25–38, 2020, [Online]. Available: https://sid.ir/paper/399799/en

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