Petrology Lab

  • Petrology is branch of geology that deals with the petrographic and A Petrogenetic studies of igneous, sedimentary and metamorphic rocks.
  • Study of the megascopic and microscopic characteristics’ of rock samples, metallic and non metallic minerals under reflected and refracted light microscope is done in petrology lab.

Applications of Petrology in Mineral Exploration

  • Many times in the field work it is not easy and viable to identify the mineral assemblage of rocks. Because the hand specimen study deals only with the physical characteristics of minerals such as color, luster, cleavage, hardness etc that are not sufficient enough to identify and classify the rock.
  • In petrology lab, we study the optical properties of minerals and their assemblage as well as texture and finally give the name of the rock.
  • Identification of ore minerals is the first and foremost step of exploration but many times they are too fine to be identified and can be recognized only under ore microscope in reflected light.
  • Thus the confirmation of rock name and the identification ore is very important as it gives the direction to geologist for the further work of exploration.

Section Cutting Lab

In section cutting lab the samples of rocks and minerals are prepared as thin sections of specified thickness and polished sections for their study un petrology lab.

Following are the equipment that are being mainly used in the lab-

Stereo Microscope

Stereo microscope is used foe magnification observation of polished section of rocks and minerals. It is also useful in studying individual grains in an aggregate, to handpick desired grains for further work such as for making polished section etc.

Leica DMLP Polarizing Microscope

This optical microscope is used for the study of thin sections of rock samples under refracted light (for petrographic study) as well as reflected light (ore microscopic study). It is mainly used in the study of ore minerals and important for economic aspects.

Leica DM EP Refracted Microscope

A fundamental principle of optical microscopy is that most minerals (except opaque) transmit light if they are sliced enough about 0.03 mm and show characteristic optical properties such as Colour, Pleochroism, Relief, Form, Cleavage, Twinkling, Interference Colour etc. which can be observed by petrographic microscope (refracted light microscope). It is very useful in the identification of minerals and determining rock type.