Flow pattern determination in magma chamber from mineral Shape preferred orientation (SPO) analysis in Granites, a case study in Alvand Batholite

Authors

1 Geology group, Basic science, Bu- Ali Sina universirty

2 Department of Geology, Faculty of Science, Bu-Ali Sina University, Hamedan, Iran

Abstract

 
The primarystructuresofgranitic body canrecording flow patternbefore completely coolling. Through theconstruction study of primery structurecan be realized partly howevolutionmagmaduringascent andthe events thatoccur  durring emplacment it. This study  introduce the way for determine of magma flow from primary structure.one ofthe useful primarystructuresingraniteispreferredorientation ofthe uhedral minerals of  potassium feldspar.With using the  Preferredorientationof K-feldspar thestrainellipsein threeexposuresdetermined from asoftwareSPO  and Then integrated them with softwareEllipsoid  and obtained Strainellipsoid. However,inthree different areasofthesouthern partofthe Alvandbatholite strainellipsoid shapeis obtained.due tothe Strain ellipsoid shapeofthemagma flow patternin the southof Alvand is non-uniformdivergent flow.In this typeofflowpattern ,magma intruded fromanarrow pipeintoa wide area, and its ascent slowly. Thistype offlow patternis made upinthe igneous body that have syntectonic emplacement

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Journal of Tectonics
Volume 1, Sep2015
April 2015
Pages 64-76

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