INTERPRETATION OF MAGNETIC FABRICS BASED ON VARIATIONS OF ANISOTROPY OF MAGNETIC SUSCEPTIBILITY (AMS) IN BOUIN- MIANDASHT GRANITOID PLUTON

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SAKI S.; SADEGHIAN M.; GHASEMI H.

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Journal: GEOSCIENCES Year:2016 | Volume:25 | Issue:98 Page(s): 385-394

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Information Journal Paper

Title

INTERPRETATION OF MAGNETIC FABRICS BASED ON VARIATIONS OF ANISOTROPY OF MAGNETIC SUSCEPTIBILITY (AMS) IN BOUIN- MIANDASHT GRANITOID PLUTON

Author(s)

SAKI S. | SADEGHIAN M. | GHASEMI H. | Issue Writer Certificate

Keywords

ANISOTROPY OF MAGNETIC SUSCEPTIBILITYQ2

MAGNETIC FABRICSQ2

PARAMAGNETICQ2

BOUIN - MIANDASHTQ2

SANANDAJ-SIRJANQ2

Abstract

Bouin- Miandasht granitoid pluton with an area of 40 Km2, outcropped in the north of Bouin Miandasht- Aligoudarz road, was emplaced into Triassic to early Jurassic low to medium grade metapelitic rocks of Sanandaj - Sirjan structural zone. This pluton composed of alkali feldspar granite to leucogranite. For the first time, variation of ANISOTROPY OF MAGNETIC SUSCEPTIBILITY (AMS) is applied to investigate magnetic fabric of this pluton. The Mean magnetic susceptibility values (Km in mSI) of the different rock groups of Bouin- Miandasht pluton are as follows: alkali feldspar granites (158), fine granites (120), coarse granites (166), and leucogranites (34). The lower Km values for the main compositions of this pluton (< 500 mSI) suggesting the PARAMAGNETIC nature of these granites. Biotite is the main carrier of magnetic properties in the studied rocks. The magnetic anisotropy (P %) varies from 1 to 15. Aalkali feldspar granites have the highest P value and show positive correlation with degree of deformation. Shape parameter of magnetic ellipsoid (T) values varies from -0.43 to 0.85 and most of the magnetic ellipsoids are oblate. Seventy five percent of specimens have positive T value. This subject indicates that magnetic ellipsoids are oblate and then foliation is prevailing, and also field evidence confirms this conclusion.

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APA: Copy

SAKI, S., SADEGHIAN, M., & GHASEMI, H.. (2016). INTERPRETATION OF MAGNETIC FABRICS BASED ON VARIATIONS OF ANISOTROPY OF MAGNETIC SUSCEPTIBILITY (AMS) IN BOUIN- MIANDASHT GRANITOID PLUTON. GEOSCIENCES, 25(98), 385-394. SID. https://sid.ir/paper/32231/en

Vancouver: Copy

SAKI S., SADEGHIAN M., GHASEMI H.. INTERPRETATION OF MAGNETIC FABRICS BASED ON VARIATIONS OF ANISOTROPY OF MAGNETIC SUSCEPTIBILITY (AMS) IN BOUIN- MIANDASHT GRANITOID PLUTON. GEOSCIENCES[Internet]. 2016;25(98):385-394. Available from: https://sid.ir/paper/32231/en

IEEE: Copy

S. SAKI, M. SADEGHIAN, and H. GHASEMI, “INTERPRETATION OF MAGNETIC FABRICS BASED ON VARIATIONS OF ANISOTROPY OF MAGNETIC SUSCEPTIBILITY (AMS) IN BOUIN- MIANDASHT GRANITOID PLUTON,” GEOSCIENCES, vol. 25, no. 98, pp. 385–394, 2016, [Online]. Available: https://sid.ir/paper/32231/en

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