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Geologic and geochemical study of rutile-bearing rocks in Colorado and description of their occurrence elsewhere.
This U. S. Geological Survey professional paper discusses aspects of the geology of titanium as a framework for appraising resources of this commodity in the light of today's technology, economics, and geologic knowledge. Contents: Titanium Contents and Titanium Partitioning in Rocks by E. R. Force Metamorphic Source Rocks of Titanium Placer Deposits - A Geochemical Cycle by E. R. Force Rutile and Sphene in Blueschist and Related High-Pressure-Facies Rocks by M. C. Blake, Jr. and Benjamin A. Morgan Titanium Deposits in Anorthosite Massifs by Norman Herz Titanium Deposits in Alkalic Igneous Rocks by Norman Herz Titanium Minerals in Deposits of Other Minerals By E. R. Force
As the importance and dependence of specific mineral commodities increase, so does concern about their supply. The United States is currently 100 percent reliant on foreign sources for 20 mineral commodities and imports the majority of its supply of more than 50 mineral commodities. Mineral commodities that have important uses and face potential supply disruption are critical to American economic and national security. However, a mineral commodity's importance and the nature of its supply chain can change with time; a mineral commodity that may not have been considered critical 25 years ago may be critical today, and one considered critical today may not be so in the future. The U.S. Geological Survey has produced this volume to describe a select group of mineral commodities currently critical to our economy and security. For each mineral commodity covered, the authors provide a comprehensive look at (1) the commodity's use; (2) the geology and global distribution of the mineral deposit types that account for the present and possible future supply of the commodity; (3) the current status of production, reserves, and resources in the United States and globally; and (4) environmental considerations related to the commodity's production from different types of mineral deposits. The volume describes U.S. critical mineral resources in a global context, for no country can be self-sufficient for all its mineral commodity needs, and the United States will always rely on global mineral commodity supply chains. This volume provides the scientific understanding of critical mineral resources required for informed decisionmaking by those responsible for ensuring that the United States has a secure and sustainable supply of mineral commodities.
An integrated reference on the economic geology of titanium that covers all the basic processes of formation of titanium-mineral deposits, organized along the lines of a geochemical cycle of titanium in order to facilitate the description of linkages among deposit types. Annotation copyright Book Ne