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Alikhani F, Shabanian N, Davoudian A. Textural analysis of spherulite accumulation of minerals in the Boein-Miandasht dioritic rocks, Sanandaj-Sirjan Zone. www.ijcm.ir 2025; 33 (1) :3-14
URL: http://ijcm.ir/article-1-1913-en.html
URL: http://ijcm.ir/article-1-1913-en.html
1- Department of Natural Engineering, Faculty of Earth Sciences and Natural Resources, Shahrekord University, Shahrekord, Iran
Abstract: (603 Views)
The Boein-Miandasht Complex, in the central part of the Sanandaj-Sirjan Zone, is composed of metamorphic rocks, and granitoid intrusions, gabbro and gabbro-diorite. The mineralogy of diorite includes plagioclase, amphibole, biotite, quartz, apatite, zircon, and titanite. Intergranular and spherulitic (radial and fibrous) textures along with aplitic texture are seen in these rocks. Spherulites are visible as a radial set or a concentric radial branch. The dimensions of the spherulites are on average up to 0.2 mm with different shapes such as fan, plume and spherical in morphology. Spherulite texture is attributed to unstable and unbalanced conditions and rapid cooling during magma crystallization. During the exhumation of the region and the melting along with the deformation and the occurrence of fracturing associated with the mixing of mafic magma with felsic magma, the spherulite texture was created in these hypabyssal rocks.
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