NEW ANALYSIS ON THE EMPLACEMENT OF ALVAND GRANITOID, USING THE RELATIONSHIP BETWEEN THE DIPPING ANGLE OF MAGNETIC LINEATION, FOLIATION AND THEIR NUMERICAL MAGNITUDE

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ASLANI A.; SHEKARI S.

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Journal: GEOSCIENCES Year:2016 | Volume:25 | Issue:98 Page(s): 127-136

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Title

NEW ANALYSIS ON THE EMPLACEMENT OF ALVAND GRANITOID, USING THE RELATIONSHIP BETWEEN THE DIPPING ANGLE OF MAGNETIC LINEATION, FOLIATION AND THEIR NUMERICAL MAGNITUDE

Author(s)

ASLANI A. | SHEKARI S. | Issue Writer Certificate

Keywords

MAGNETIC LINEATIONQ2

MAGNETIC FOLIATIONQ2

ALVAND GRANITOIDQ2

Abstract

The southern ALVAND GRANITOID with an outcrop area of 120 km2 is situated at south and southwest of Hamedan city. The porphyry biotite bearing granitoids are the main constitute of the pluton. Biotite is responsible for magnetic behavior of this pluton. The MAGNETIC LINEATION (L), foliation (F), and anisotropy (P) parameters of oriented samples of 107 stations were measured at environmental and paleomagnetic laboratory based in Geological Survey of Iran, Tehran, Iran. The analysis of these parameters revealed the existence of reverse relationship between dipping angle of MAGNETIC LINEATION and foliation with their numerical magnitude, and that the MAGNETIC LINEATION and foliation are accordance with magnetic anisotropy in ALVAND GRANITOID. The above mentioned relationship may resulted due to interaction of different effective forces during ascending and emplacement of magma as well as their ability in ordering magnetic minerals in various positions within the magma. As orientation of the magnetic minerals increases, the numerical magnitude of MAGNETIC LINEATION and foliation also, increases. The microstructural analysis also showed that most of the observed orientation in enclaves and alkali feldspars of the studied area is due to magma flow. In this study, where ever the numerical magnitude of MAGNETIC LINEATION was high, the magnetic ellipsoid was prolate and where ever the numerical magnitude of MAGNETIC FOLIATION was high, the magnetic ellipsoid was oblate. The Darreh-Bagh granitoid at northwest of Aligodarz city in the Sanandaj- Sirjan zone, shows the same relationships between magnetic parameters and is used as a support for findings in this study.

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APA: Copy

ASLANI, A., & SHEKARI, S.. (2016). NEW ANALYSIS ON THE EMPLACEMENT OF ALVAND GRANITOID, USING THE RELATIONSHIP BETWEEN THE DIPPING ANGLE OF MAGNETIC LINEATION, FOLIATION AND THEIR NUMERICAL MAGNITUDE. GEOSCIENCES, 25(98), 127-136. SID. https://sid.ir/paper/32233/en

Vancouver: Copy

ASLANI A., SHEKARI S.. NEW ANALYSIS ON THE EMPLACEMENT OF ALVAND GRANITOID, USING THE RELATIONSHIP BETWEEN THE DIPPING ANGLE OF MAGNETIC LINEATION, FOLIATION AND THEIR NUMERICAL MAGNITUDE. GEOSCIENCES[Internet]. 2016;25(98):127-136. Available from: https://sid.ir/paper/32233/en

IEEE: Copy

A. ASLANI, and S. SHEKARI, “NEW ANALYSIS ON THE EMPLACEMENT OF ALVAND GRANITOID, USING THE RELATIONSHIP BETWEEN THE DIPPING ANGLE OF MAGNETIC LINEATION, FOLIATION AND THEIR NUMERICAL MAGNITUDE,” GEOSCIENCES, vol. 25, no. 98, pp. 127–136, 2016, [Online]. Available: https://sid.ir/paper/32233/en

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