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2. How would you go about finding such a grain in a thin section containing numerous grains? Note: isotropic grains have no interference figure.

2. How would you go about finding such a grain in a thin section containing numerous grains? Note: isotropic grains have no interference figure.

Applications and Investigations in Earth Science (9th Edition)
Applications and Investigations in Earth Science (9th Edition)
9th Edition
ISBN:9780134746241
Author:Edward J. Tarbuck, Frederick K. Lutgens, Dennis G. Tasa
Publisher:Edward J. Tarbuck, Frederick K. Lutgens, Dennis G. Tasa
Chapter1: The Study Of Minerals
Section: Chapter Questions
Problem 1LR
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2. How would you go about finding such a grain in a thin section containing numerous grains? Note: isotropic grains have no interference figure.
Transcribed Image Text:2. How would you go about finding such a grain in a thin section containing numerous grains? Note: isotropic grains have no interference figure.
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Step 1: techniques 1

Though it can be difficult, geology and material science frequently need the identification of a particular grain in a thin section that contains many grains. It could be even more challenging if the grains are isotropic and do not generate an interference figure. Still, there are a number of methods and approaches you can employ:

Index of Refraction:

  • Knowing the approximate index of refraction of the mineral you're looking for can help. For example, glass has an index of refraction around 1.5.

Photomicrography and Image Analysis:

  • Take high-resolution photographs through the microscope and use image processing techniques to enhance the features of interest.
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