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Stable Mineral Assemblages of Igneous Rocks: A Method of Calculation (Minerals, Rocks and Mountains, 7) by Professor Dr. Dr. h. c. Alfred Rittmann (auth.) is a nonfiction available to read on EtoBox.

What is Stable Mineral Assemblages of Igneous Rocks: A Method of Calculation (Minerals, Rocks and Mountains, 7) about?

This book represents the results of a lengthy study which Professor ALFRED RITTMANN began some thirty years ago. The relationship between the chemical and mineralogical composition of igneous rocks is established as far as is possible. Petrographers will appreciate that this problem is extremely complex, particularly since this relationship forms the basis of the classification and nomenclature of igneous rocks. The ingenious scheme of calculation of the CI.P.W. norm system is essentially chemical in nature. The compositions of the stoichiometrically ideal "normative minerals" do not correspond to those of the constituent minerals found in rocks. Although the "norm" is not intended to equal the "mode" or actual mineral composition of a rock, at least a qualitative agreement between the norm and the mode is desirable. For a number of rocks and rock groups, especially the leucocratic and silicic rocks, the deviation of the norm from the mode is generally within tolerable limits. For the melanocratic and highly subsilicic rocks, on the other hand, the CI.P. W. scheme of calculation too often yields results which fail to reflect the observed mineral composition. The anomalies produced

Who reads Stable Mineral Assemblages of Igneous Rocks: A Method of Calculation (Minerals, Rocks and Mountains, 7)?

Author

Professor Dr. Dr. h. c. Alfred Rittmann (auth.)

Publisher

Springer-Verlag Berlin Heidelberg

Published

1973

Language

EN

ISBN

9780387060309

Category

nonfiction

Subjects

Science, Stem