Timberville and Austinville-Ivanhoe MVT districts

Region East, Southeast
Mineral systems
Deposit types
Critical minerals
Other minerals

Information leading to the delineation of this focus area

Basis for focus area Epigenetic carbonate-hosted lead-zinc enrichment in stratabound zones hosted by Cambrian Shady Dolomite at Austinville-Ivanhoe district, and similar style of mineralization in stratiform breccia and replacement deposits at the Timberville district in Ordovician Beekmantown Formation in the northern Shenandoah Valley.
Identified resources Identified resources and historical production of lead and zinc.
Production Overall production from Austinville and Ivanhoe estimated at 34 million tons of Pb-Zn concentrate from ore averaging 4.7% combined Pb-Zn.
Status Past mining. Current mining at Austinville produces agricultural lime from historical mine tailings.
Estimated resources At the time of closure in 1981, New Jersey Zinc Corp estimated remaining mineable ore reserves of about 900,000 tons.
Geologic maps Austinville-Ivanhoe area: unpublished New Jersey Zinc Corp mine maps; Virginia Division of Mineral Resources (1993), scale 1:500,000; Timberville area: Heller and others (2014), scale 1:24,000; Heller and others (2018), scale 1:24,000; Stephenson (1949, plate 1), scale unknown.
Geophysical data Inadequate aeromagnetic and aeroradiometric data.
Favorable rocks and structures Austinville-Ivanhoe district: Cambrian Shady Dolomite; Timberville district: Ordovician Beekmantown Formation.
Deposits Austinville-Ivanhoe district; Austinville East mine (MRDS dep_id: 10088538), Austinville Flatwood mine (MRDS dep_id: 10067278); Timberville district: Bowers-Campbell mine (MRDS dep_id: 10111261).
Evidence from mineral occurrences MRDS; Virginia Dept. Energy Economic Geology Files.
Geochemical evidence See Good and Allen (1972).
Geophysical evidence Unknown.
Evidence from other sources Geologic mapping.
Comments Despite their locations in different stratigraphic unites, the various occurrences of Appalachian MVT deposits have many similarities (Appold and others, 1995).
Cover thickness and description Exposed bedrock to thin cover.
Authors William L. Lassetter.
New data needs Geochemical sampling for a comprehensive suite of metals to assess potential critical commodities that have been overlooked in the past. Mine waste materials may be of particular interest. Also geologic mapping in selected areas.
Geologic mapping and modeling needs 1:24,000 scale geologic mapping.
Geophysical survey and modeling needs Not requested at this time.
Digital elevation data needs Lidar complete.