Authors : Abdollah Yazdi, Elham ShahHoseini and Roghayesadat Razavi
Abstract: Relying on the magnetic fabrics study, Anisotropy of Magnetic Susceptibility (AMS) enjoys a special status in determining the mechanism and model of emplacement of intrusive rocks. Parameters resulted from AMS study is based on behaviors of magnetic minerals. The most important function of magnetic anisotropy measurement is to analyze rocks’ petrofabric which will be possible through identification of mineral stones and their magnetic anisotropic characteristics. One of such dykes, located at the Southwestern wing of Sabzevar City was studied using magnetic Anisotropic Method. Studies showed that the Km value (in terms of μSI) ranges between 33334 and 96836 and represent the clear presence of magnetite in the studied rocks. Lineation and foliation gradients represent magma flow in a roughly longitudinal plane. The magnetic anisotropy values vary between 0.38 and 1.76. With regard to the achieved values for the (T) shape parameter, most magnetic ellipsoidal figures were prolate form.
Abdollah Yazdi, Elham ShahHoseini and Roghayesadat Razavi, 2016. AMS, A Method for Determining Magma Flow in Dykes (Case Study: Andesite Dyke). Research Journal of Applied Sciences, 11: 62-67.