Petrography Microscopy Granite

Petrography and mineralogy the granites are mesocratic to leucocratic and medium to coarse grained.

Petrography microscopy granite. 1 biotite is ubiquitously present in sg and totally absent in gg. A petrographic microscope is a type of optical microscope used in petrology and optical mineralogy to identify rocks and minerals in thin sections. A slice of rock was affixed to a microscope slide and then ground so thin that light could be transmitted through mineral grains that otherwise appeared opaque. Optical microscopy using transmitted light.

The position of adjoining grains was not disturbed thus permitting analysis of rock texture. Intruded by a variety of plutonic rocks such as biotite granite syenite leucogranite and minor pegmatite and aplite dikes of eocene to mioceneages. Inclusion petrography of metamorphic rock hosted gold deposit at onzon kanbani area central myanmar. Since textural details contribute greatly to knowledge of the sequence of crystallization of the various mineral constituents in a rock petrography progressed into.

Coal petrography is the study of the organic constituents of sedimentary rocks originally by optical microscopy of thin sections transmitted light or of polished blocks reflected light. Petrographic characteristics of sewariya granite and govindgarh granite shows the following distinctions between these two rocks. Microscopy petrography one of the most effective methods used to evaluate concrete quality diagnose causes of deterioration and determine extent of damage is petrographic examination. Using polarized light microscopy plm and xrd xrf bulk analysis can provide information about bulk composition of a rock for grade and tonnage as well as characterizing the rock system.

The method is called polarized light microscopy plm. Fluorescence microscopy is used to complement the more traditional approaches. The microscope is used in optical mineralogy and petrography a branch of petrology which focuses on detailed descriptions of rocks. Thin section petrography for ees 330 356 thin section images ductiley sheared granite cordillera darwin southern chile ductile fabrics and kinematic indicators in high temperature ignimbrites shoshone hills and brown s bench ignimbrite succession southern snake river plain idaho.

Thin section petrography became the standard method of rock study. To the east shan plateau is a. These are photomicrographs very thin slices of rock seen in plane polarised light or between crossed polarisers when the colours seen are produced by interference of light. Under the microscope the granites exhibit mostly hypidiomorphic granular texture figure 5a and at.