Titanium deposits in alkalic igneous rocks
Open-File Report
75-35
By: Norman Herz
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Abstract
Many types of alkalic rocks are enriched in Ti02 relative to the average for the crust. Silicate minerals in these rocks may have high Ti02 contents, but the oxides ilmenite, rutile, brookite, and perovskite are also characteristic primary phases. These tend to be higher in niobium than are the same minerals from other rock suites.
At Tapira, Brazil, titanium minerals in a carbonatite complex comprise tens of millions of tons contained Ti02. Anatase (as "leucoxene") is present in laterite lying over parent rocks containing perovskite, ilmenite, and rutile. In other discovered localities of alkalic rocks, production of titanium minerals is at best economically marginal.
| Publication type | Report |
|---|---|
| Publication Subtype | USGS Numbered Series |
| Title | Titanium deposits in alkalic igneous rocks |
| Series title | Open-File Report |
| Series number | 75-35 |
| DOI | 10.3133/ofr7535 |
| Year Published | 1975 |
| Language | English |
| Publisher | U.S. Geological Survey |
| Description | i, 20 p. |
| Google Analytic Metrics | Metrics page |