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The Economic Aspect of Geology By: C. K. (Charles Kenneth) Leith (1875-1956) |
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C. K. LEITH
UNIVERSITY OF WISCONSIN
[Illustration]
NEW YORK
HENRY HOLT AND COMPANY
COPYRIGHT, 1921 BY HENRY HOLT AND COMPANY August, 1923 PRINTED IN THE U. S. A.
CONTENTS PAGE
CHAPTER I. INTRODUCTION 1 SURVEY OF FIELD 1 ECONOMIC APPLICATIONS OF THE SEVERAL BRANCHES OF GEOLOGY
AND OF OTHER SCIENCES 3
Mineralogy and petrology 3
Stratigraphy and paleontology 4
Structural geology 5
Physiography 6
Rock alterations or metamorphism 10
Application of other sciences 10 TREATMENT OF THE SUBJECT IN THIS VOLUME 11
CHAPTER II. THE COMMON ELEMENTS, MINERALS, AND
ROCKS OF THE EARTH AND THEIR ORIGINS 13 RELATIVE ABUNDANCE OF THE PRINCIPAL ELEMENTS OF THE
LITHOSPHERE 13 RELATIVE ABUNDANCE OF THE PRINCIPAL MINERALS OF THE
LITHOSPHERE 14 RELATIVE ABUNDANCE OF THE PRINCIPAL ROCKS OF THE LITHOSPHERE 16 WATER (HYDROSPHERE) 18 SOILS AND CLAYS 18 COMPARISON OF LISTS OF MOST ABUNDANT ROCKS AND MINERALS WITH
COMMERCIAL ROCKS AND MINERALS 18 THE ORIGIN OF COMMON ROCKS AND MINERALS 18
Igneous processes 19
Igneous after effects 19
Weathering of igneous rocks and veins 20
Sedimentary processes 22
Weathering of sedimentary rocks 23
Consolidation, cementation, and other sub surface
alterations of rocks 24
Cementation 24
Dynamic and contact metamorphism 25 THE METAMORPHIC CYCLE AS AN AID IN STUDYING MINERAL DEPOSITS 27
CHAPTER III. SOME SALIENT FEATURES OF THE GEOLOGY
AND CLASSIFICATION OF MINERAL DEPOSITS 29 VARIOUS METHODS OF CLASSIFICATION 29 NAMES 31 MINERAL DEPOSITS AS MAGMATIC SEGREGATIONS IN IGNEOUS ROCKS 34 MINERAL DEPOSITS WITHIN AND ADJACENT TO IGNEOUS ROCKS,
WHICH WERE FORMED IMMEDIATELY AFTER THE COOLING AND
CRYSTALLIZATION OF THE MAGMAS THROUGH THE AGENCY OF HOT
MAGMATIC SOLUTIONS 36
Evidence of igneous source 37
Possible influence of meteoric waters in deposition of ores
of this class 41
Zonal arrangement of minerals related to igneous rocks 42
The relation of contact metamorphism to ore bodies of the
foregoing class 45 SECONDARY CONCENTRATION IN PLACE OF THE FOREGOING CLASSES OF
MINERAL DEPOSITS THROUGH THE AGENCY OF SURFACE SOLUTIONS 46 RESIDUAL MINERAL DEPOSITS FORMED BY THE WEATHERING OF
IGNEOUS ROCKS IN PLACE 50 MINERAL DEPOSITS FORMED DIRECTLY AS PLACERS AND SEDIMENTS 51
Mechanically deposited minerals 51
Chemically and organically deposited minerals 52 SEDIMENTARY MINERAL DEPOSITS WHICH HAVE REQUIRED FURTHER
CONCENTRATION TO MAKE THEM COMMERCIALLY AVAILABLE 54 ANAMORPHISM OF MINERAL DEPOSITS 57 CONCLUSION 58
CHAPTER IV... Continue reading book >>
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