Gorman tin district

Region West, Southwest
Mineral systems
Deposit types
Critical minerals
Other minerals

Information leading to the delineation of this focus area

Basis for focus area Limestone of probable Paleozoic or Mesozoic age from the California state geologic map that hosts the Meeke mine and occurrences. Shown as PZm marble on 1:24,000-scale maps of the area. Skarn mineralization in marble pendants and stoped blocks within the Cretaceous Tejon Lookout Granite.
Identified resources Identified resources of tin
Production None.
Status Unknown.
Estimated resources Placer reserves total 800 yd3 of 0.5 to 1% Sn; 2,460 yd3 of 0.1 to 0.5% Sn; and 10,000 yd3 containing of 0.05% Sn (Wiese and Page, 1945).
Geologic maps Olson and Swanson (2017), scale 1:24,000; Olson and Swanson (2019), scale 1:24,000.
Geophysical data Inadequate aeromagnetic and aeroradiometric coverage.
Favorable rocks and structures Several areas of soil were identified as potential areas for placer tin (Wiese and Page, 1945).
Deposits Possible placers near Meeke mine area.
Evidence from mineral occurrences Wiese and Page (1945).
Geochemical evidence District was discovered in 1940 when cassiterite was identified in gravels at the head of Alamos Creek.
Geophysical evidence Unknown.
Evidence from other sources Unknown.
Cover thickness and description Exposed.
Authors Jane M. Hammarstrom.
New data needs None requested at this time.
Geologic mapping and modeling needs None requested at this time.
Geophysical survey and modeling needs None requested at this time.
Digital elevation data needs Lidar complete.