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The AAPG/Datapages Combined Publications Database
Wyoming Geological Association
Abstract
Fe-Ti Oxide Deposits of the Laramie Anorthosite Complex: Their Geology and Proposed Economic Utilization
Abstract
The vanadium-bearing Fe-Ti oxide deposits of the Laramie Anorthosite Complex represent one of the major undeveloped titanium resources in the United States. There are two major types of ores. The massive ores, which are represented by the Iron Mountain, Shanton, and Sybille pit deposits, occur as massive tabular bodies of nearly pure Fe-Ti oxide. They are associated with late-stage olivine gabbros and troctolites and appear to have formed through gravitational settling of either Fe-Ti oxide grains or an oxide melt that accumulated at the base of the troctolite bodies and intruded downward into the underlying anorthosite as dike-like bodies. The disseminated oxide ores are best represented by the Strong Creek deposit. These seem to be cumulate oxide horizons that occur within late-stage gabbros.
These ores can be refined by a metallurgical process that involves melting and reduction of the iron to its native state. The molten iron is then extracted for refining to steel in a minimill, while the associated slag is refined into titanium dioxide and vanadium pentoxide. Economic studies show that there is a ready domestic market for these products.
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