Optical mineralogy, free pdf download

In the preparation of this printing the author has benefited by the assistance and encouragement of his wife, Florence S. However, it is not at all obvious just which optical prop erty should be used first in classifying the minerals. After several attempts to combine the most important properties in one table so that more than one of them could be used first, it seemed wiser to simplify the arrangement by making separate tables for each important property.

In addition to the tables which are given, tables might be prepared based primarily upon the optic angle, optic sign, or extinction angles. However, the practical groups based upon optic angle or optic sign are too few in number to be satisfactory, while extinction angles are almost useless in distinguishing between tetragonal, hexagonal and orthorhombic minerals.

Thus it comes about that the chief tables which are given are based upon refringence, or birefringence, or color and pleochroism. As the dispersion methods of determining minerals come into wider use the table based upon dispersion will become more complete and more useful. It is a pleasure to acknowledge that these tables have been improved as a result of thoughtful constructive criticism of the first draft by Professor F.

Grout of the University of Minnesota the writer has also had the advantage of an opportunity to examine copies of determinative mineral tables prepared by Professor Grout and others prepared by Professor D. Fisher of the University of Chicago. He has also benefited notably by frequent consultations with Professor R. Emmons of the University of Wisconsin. Plate II, based on refringence and birefringence, has been prepared along lines suggested by Professor C.

Jones of the State College of Washington. Gribble Optical mineralogy: principles and practice Author : C. This introductory text deals in detail with the main optical properties of rock-forming minerals that can be recognized under the microscope. Written specifically with the needs of the student in mind, it provides a firm foundation upon which to base more advanced studies of mineral associations and paragenesis, their chemistry and other parameters.

It encompasses both the silicate and non-silicate minerals, translucent and opaque, thereby making it useful in studies of ore minerals as well as the more common rock-forming varieties. The theory of transmitted- and reflected-light optics is dealt with in considerable detail, so that the precise nature of an optical property can be understood.

Diagrams of the optically more complex minerals accompany their descriptions, and these serve to simplify the relationship between the optical properties and the crystallography of a particular mineral. Rarer minerals are also included. Each mineral description is accompanied by a brief synopsis of the mineral's occurrence: in which rocks it is found and which other minerals are associated with it. This work has been selected by scholars as being culturally important and is part of the knowledge base of civilization as we know it.

This work is in the public domain in the United States of America, and possibly other nations. Within the United States, you may freely copy and distribute this work, as no entity individual or corporate has a copyright on the body of the work.

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To ensure a quality reading experience, this work has been proofread and republished using a format that seamlessly blends the original graphical elements with text in an easy-to-read typeface.

The book is therefore suitable for the novice either studying as an individual or participating in classwork. Both transmitted-light microscopy and reflected-light microscopy are dealt with, the former involving examination of transparent minerals in thin section and the latter involving examination of opaque minerals in polished section. Reflected-light microscopy is increasing in importance in undergraduate courses on ore mineralisation, but the main reason for combining the two aspects of microscopy is that it is no longer acceptable to neglect opaque minerals in the systematic petrographic study of rocks.

Dual purpose microscopes incorporating transmitted- and reflected-light modes are readily available, and these are ideal for the study of polished thin sections. Author : C. Our intention, once again, is to introduce the student of geology to the microscopic examination of minerals, by both transmitted and reflected light.

These techniques should be mastered by students early in their careers, and this text has been proposed in the full awareness that it will be used as a laboratory handbook, serving as a quick reference to the properties of minerals. However, care has been taken to present a systematic explanation of the use of the microscope, as well as to include an extended explanation of the theoretical aspects of optical crystallography in transmitted light.

The book is therefore intended as a serious text that introduces the study of minerals under the microscope to the intending honours student of geology, as well as providing information for the novice or interested layman. Author : M. It contains details on polarizing microscopes, mineral determination, igneous rock types, geological mapping and much more.

This is a fascinating work and is thoroughly recommended for anyone interested in geology. Many of the earliest books, particularly those dating back to the s and before, are now extremely scarce. We are republishing these classic works in affordable, high quality, modern editions, using the original text and artwork.

Although occasionally there may be certain imperfections with these old texts, we feel they deserve to be made available for future generations to enjoy. Author : Edwards M. This is done to avoid confusion, especially in conversation or discussion, with the crystallographic axes. About the Publisher Forgotten Books publishes hundreds of thousands of rare and classic books.

Find more at www. Forgotten Books uses state-of-the-art technology to digitally reconstruct the work, preserving the original format whilst repairing imperfections present in the aged copy.