CHAPTER | PAGE |
INTRODUCTION | 1 |
Survey of Field |
Economic applications of the several branches of geology and of other sciences |
Mineralogy and petrology |
Stratigraphy and paleontology |
Structural geology |
Physiography |
Rock alterations or metamorphism |
Application of other sciences |
Treatment of the subject in this volume |
THE COMMON ELEMENTS, MINERALS, AND ROCKS OF THE EARTH AND THEIR ORIGINS | 13 |
Relative abundance of the principal elements of the lithosphere |
Relative abundance of the principal minerals of the lithosphere |
Relative abundance of the principal rocks of the lithosphere |
Water (hydrosphere) |
Soils and clays |
Comparison of lists of most abundant rocks and minerals with commercial rocks and minerals |
The origin of common rocks and minerals |
Igneous processes |
Igneous after-effects |
Weathering of igneous rocks and veins |
Sedimentary processes |
Weathering of sedimentary rocks |
Consolidation, cementation, and other sub-surface alterations of rocks |
Cementation |
Dynamic and contact metamorphism |
The metamorphic cycle as an aid in studying mineral deposits |
SOME SALIENT FEATURES OF THE GEOLOGY AND CLASSIFICATION OF MINERAL DEPOSITS | 29 |
Various methods of classification |
Names |
Mineral deposits as magmatic segregations in igneous rocks |
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 |
Evidence of igneous source |
Possible influence of meteoric waters in deposition of ores of this class |
Zonal arrangement of minerals related to igneous rocks |
The relation of contact metamorphism to ore bodies of the foregoing class |
Secondary concentration in place of the foregoing classes of mineral deposits through the agency of surface solutions |
Residual mineral deposits formed by the weathering of igneous rocks in place |
Mineral deposits formed directly as placers and sediments |
Mechanically deposited minerals |
Chemically and organically deposited minerals |
Sedimentary mineral deposits which have required further concentration to make them commercially available |
Anamorphism of mineral deposits |
Conclusion |
MINERAL RESOURCESSOME GENERAL QUANTITATIVE CONSIDERATIONS | 60 |
World annual production of minerals in short tons |
World annual production of minerals in terms of value |
Significance of geographic distribution of mineral production |
The increasing rate of production |
Capital value of world mineral reserves |
Political and commercial control of mineral resources |
Reserves of mineral resources |
WATER AS A MINERAL RESOURCE | 67 |
General geologic relations |
Distribution of underground water |
Movement of underground water |
Wells and springs |
Composition of underground waters |
Relation of geology to underground water supply |
Surface water supplies |
Underground and surface waters in relation to excavation and construction |
THE COMMON ROCKS AND SOILS AS MINERAL RESOURCES | 80 |
Economic features of the common rocks |
Granite |
Basalt and related types |
Limestone, marl, chalk |
Marble |
Sand, sandstone, quartzite (and quartz) |
"Sand and gravel" |
Clay, shale, slate |
The feldspars |
Hydraulic cement (including Portland, natural, and Puzzolan cements) |
Geologic features of the common rocks |
Building stone |
Crushed stone |
Stone for metallurgical purpposes |
Clay |
Limitations of geologic field in commercial investigation of common rocks |
Soils as a mineral resource |
Origin of soils |
Composition of soils and plant growth |
Use of geology in soil study |
THE FERTILIZER GROUP OF MINERALS | 99 |
General comments |
Nitrates |
Economic features |
Geologic features |
Phosphates |
Economic features |
Geologic features |
Pyrite |
Economic features |
Geologic features |
Sulphur |
Economic features |
Geologic features |
Potash |
Economic features |
Geologic features |
THE ENERGY RESOURCESCOAL, OIL, GAS (AND ASPHALT) | 115 |
Coal |
Economic features |
World production and trade |
Production in the United States |
Coke |
Classification of coals |
Geologic features |
Petroleum |
Economic ffeatures |
Production and reserves |
Methods of estimating reserves |
Classes of oils |
Conservation of oil |
Geologic features |
Organic theory of origin |
Effect of differential pressures and folding on oil genesis and migration |
Inorganic theory of origin |
Oil exploration |
Oil shales |
Natural gas |
Economic features |
Geologic features |
Asphalt and bitumen |
Economic features |
Geologic features |
MINERALS USED IN THE PRODUCTION OF IRON AND STEEL (THE FERRO-ALLOY GROUP) | 154 |
General features |
Iron ores |
Economic features |
Technical and commercial factors determining use of iron ore materials |
Geographic distribution of iron ore production |
World reserves and future production of iron ore |
Geologic features |
Sedimentary iron ores |
Iron ores associated with igneous rocks |
Iron ores due to weathering of igneous rocks |
Iron ores due to weathering of sulphide ores |
Manganese ores |
Economic features |
Geologic features |
Chrome (or chromite) ores |
Economic features |
Geologic features |
Nickel ores |
Economic features |
Geologic features |
Tungsten (wolfram) ores |
Economic features |