Catoctin Formation metavolcanics in Maryland

Region East, Northeast
Mineral systems
Deposit types
Other minerals

Information leading to the delineation of this focus area

Basis for focus area Elevated REE abundances from a sample of a rhyolitic dike member (Burton and others, 1995) suggest potential source of critical mineral commodities.
Identified resources Unknown.
Production Unknown.
Status Unknown.
Estimated resources Unknown.
Geologic maps Horton and others (2017), scale 1:500,000; Fauth (1977), scale 1:24,000; Brezinski (2004a, b, c, 2009), scale 1:24,000; Brezinski and Fauth (2005, 2009), scale 1:24,000; Southworth and others (2002), scale 1:100,000.
Geophysical data Inadequate Rank 3 to 4 aeromagnetic and Rank 4 aeroradiometric coverage.
Favorable rocks and structures Rhyolite dike.
Deposits None.
Evidence from mineral occurrences Potential from mineral system/deposit type.
Geochemical evidence Elevated REE in rhyolitic dike member (Burton and others, 1995).
Geophysical evidence Unknown.
Evidence from other sources Unknown.
Cover thickness and description Variable cover and saprolite, some urban areas.
Authors William Junkin, Rebecca Kavage Adams, David K. Brezinski.
New data needs Geophysical data, geologic mapping, and geochemical analyses; lidar.
Geologic mapping and modeling needs Some 1:24,000 scale mapping exists, but incomplete.
Geophysical survey and modeling needs High resolution aeromagnetic and aeroradiometric coverage.
Digital elevation data needs Lidar inadequate.