INVESTIGATION OF PHYSICAL PROCESSES OF CRYSTALLIZATION IN IGNEOUS ROCKS FROM SE BIRJAND USING 3-D SHAPE MODELING OF PLAGIOCLASE CRYSTALS

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AMINI S.; ESKANDARY A.

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Paper Information

Journal: Iranian Journal of Crystallography and Mineralogy Year:2011 | Volume:18 | Issue:4 Page(s): 669-684

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Title

INVESTIGATION OF PHYSICAL PROCESSES OF CRYSTALLIZATION IN IGNEOUS ROCKS FROM SE BIRJAND USING 3-D SHAPE MODELING OF PLAGIOCLASE CRYSTALS

Author(s)

AMINI S. | ESKANDARY A. | Issue Writer Certificate

Keywords

CRYSTAL SHAPEQ3

IGNEOUS CRYSTALLIZATIONQ3

TEXTURAL COARSENINGQ3

BIRJANDQ2

Abstract

Shape or habit of crystal is controlled by physicochemical conditions of crystallization, thus quantitative measurements of CRYSTAL SHAPE can reveal aspects of crystallization environment. In this paper, based on statistical calculations, numerical modeling software and microscopic observations. various methods of quantitative measurement of the shape of crystal have used More than 3200 plagioclase crystals in 9 thin sections of the two groups of rocks including basaltic andesite and quartz diorite were processed. Study area is located about 120 Km southeast of BIRJAND. The results of calculated crystals aspect ratio (Short: Intermedite: Long or S: I: L) have showed that both groups have tabular habit (I »L), but tabulation amount in the first group is to be more (I, L>2). Analysis demonstrates that microlites in the first group were formed under conditions with high undercooling, fast growth rate and environment with high advection (relative movement between the crystal and growing medium) and the high mechanical movement of magma and high chemical potential gradient had significant role on ctystal shapes. In the second group, contrastingly, low growth rate and high diffusion rate were established. Also, TEXTURAL COARSENING process was affected on shift of CRYSTAL SHAPEs from tabular to more equant forms and reduction of aspect ratio with increment of maximum length of crystals.

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APA: Copy

AMINI, S., & ESKANDARY, A.. (2011). INVESTIGATION OF PHYSICAL PROCESSES OF CRYSTALLIZATION IN IGNEOUS ROCKS FROM SE BIRJAND USING 3-D SHAPE MODELING OF PLAGIOCLASE CRYSTALS. IRANIAN JOURNAL OF CRYSTALLOGRAPHY AND MINERALOGY, 18(4), 669-684. SID. https://sid.ir/paper/3761/en

Vancouver: Copy

AMINI S., ESKANDARY A.. INVESTIGATION OF PHYSICAL PROCESSES OF CRYSTALLIZATION IN IGNEOUS ROCKS FROM SE BIRJAND USING 3-D SHAPE MODELING OF PLAGIOCLASE CRYSTALS. IRANIAN JOURNAL OF CRYSTALLOGRAPHY AND MINERALOGY[Internet]. 2011;18(4):669-684. Available from: https://sid.ir/paper/3761/en

IEEE: Copy

S. AMINI, and A. ESKANDARY, “INVESTIGATION OF PHYSICAL PROCESSES OF CRYSTALLIZATION IN IGNEOUS ROCKS FROM SE BIRJAND USING 3-D SHAPE MODELING OF PLAGIOCLASE CRYSTALS,” IRANIAN JOURNAL OF CRYSTALLOGRAPHY AND MINERALOGY, vol. 18, no. 4, pp. 669–684, 2011, [Online]. Available: https://sid.ir/paper/3761/en

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