Southeast Oregon lithium

Region West, Northwest
Mineral systems
Deposit types
Other minerals

Information leading to the delineation of this focus area

Basis for focus area Outline of 10 HUC8 boundaries that include 10 hot spring or lake sites some of which have been partially explored for lithium and/or boron).
Identified resources Unknown.
Production Unknown.
Status Unknown.
Estimated resources Unknown.
Geologic maps Bawiec and others (1990), scale 1:250,000; Walker and Repenning (1965), scale 1:250,000.
Geophysical data Inadequate aeromagnetic coverage. Inadequate aeroradiometric coverage except for small area (10%) in southwest corner of area.
Favorable rocks and structures Lithium concentrations occur in caldera-fill sedimentary rocks and lacustrine playa sediments.
Deposits Summer Lake, Alkali Lake, Borax Lake, Harney Lake, Coyote Lake, Crystal Crane hot springs, Alvord hot springs, Hart Mountain hot springs, Mickey hot springs.
Evidence from mineral occurrences MRDS.
Geochemical evidence Geochemically anomalous values for elements associated with saline deposits such as B, Li, and K (Bawiec and others, 1990).
Geophysical evidence Unknown.
Evidence from other sources Unknown.
Comments Within the McDermitt caldera complex, fluids have remobilized Hg, U, and Li, from adjoining rhyolite and reconcentrated it into higher grade deposits (Rytuba and Glanzman, 1979). McDermitt caldera complex is included into a separate focus area.
Cover thickness and description Exposed at the surface.
Authors Lisa L. Stillings, Jane M. Hammarstrom.
New data needs High resolution geophysics, geologic mapping, lidar.
Geologic mapping and modeling needs Models for Li brines and clays both require a Li source, and the source will be Neogene volcanic and sedimentary rocks within a HUC or within a neighboring HUC. Geologic mapping is needed to identify these lithologies and their location with respect to basins (in the center of a HUC).
Geophysical survey and modeling needs High resolution, Rank 1, aeromagnetic surveys would be useful.
Digital elevation data needs Lidar variable, but much of the focus area has no lidar coverage.