Volume 8, Issue 2 (Autumn & Winter 2023)
KJES 2023, 8(2): 236-258 |
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Souri M, Ahmadi Khalaji A, Wang J, Esmaeili R, Ebrahimi M. Amphibole mineral chemistry of amphibolites from the Makran accretionary complex (southeast of Iran). KJES 2023; 8 (2) :236-258
URL: http://gnf.khu.ac.ir/article-1-2869-en.html
URL: http://gnf.khu.ac.ir/article-1-2869-en.html
Amphibole mineral chemistry of amphibolites from the Makran accretionary complex (southeast of Iran)
1- Lorestan University
2- Lorestan University , ahmadikhalaj.a@lu.ac.ir
3- University of Chinese Academy of Sciences
4- University of Zanjan
2- Lorestan University , ahmadikhalaj.a@lu.ac.ir
3- University of Chinese Academy of Sciences
4- University of Zanjan
Abstract: (111 Views)
Amphibolites are a major component of the northern Makran ophiolite belts. They include both foliated and massive types. They are diverse in mineralogy and include amphibolite, garnet-pyroxene amphibolite, and epidote-garnet amphibolite. In addition to plagioclase and amphibole, which are the main constituent phases, other minerals such as zircon, sphene and quartz are also found in amphibolites. According to mineral chemistry, the amphiboles in these rocks are calcic type, and compositionally range from magnesian to ferrohornblende. Geothermobarometry of the amphiboles indicates a pressure ≤ 7 kbar (4-6 kbar) and a temperature range of 750-800°C. Thus, geothermobarometry of amphiboles shows that the Makran amphibolites were metamorphosed at high-temperature and low to medium pressure metamorphic facies (Abukuma-type metamorphism).
Type of Study: Original Research |
Subject:
Petrology
Received: 2022/12/20 | Accepted: 2023/02/26 | Published: 2023/03/17
Received: 2022/12/20 | Accepted: 2023/02/26 | Published: 2023/03/17
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