We heard an interesting presentation from Greg Marquis of the California Geological Survey last Thursday during the virtual NorCal section quarterly meeting. Greg sent me some additional resources and follow-up info to share with the group. Enjoy!
The most recent non-fuel mineral production report:
· https://www.conservation.ca.gov/cgs/documents/publications/bulletins/B_232-California-Non-fuel-Mineral-Production-2022-a11y.pdf
The three Salton Sea area preliminary geologic maps:
· https://www.conservation.ca.gov/cgs/documents/publications/regional-geologic-maps/preliminary-rgm/PGM_24-04-Hedges-24k-v1-a11y.pdf
· https://www.conservation.ca.gov/cgs/documents/publications/regional-geologic-maps/preliminary-rgm/PGM_24-06-PicachoPeak-24k-v1-a11y.pdf
· https://www.conservation.ca.gov/cgs/documents/publications/regional-geologic-maps/preliminary-rgm/PGM_24-05-Ogilby-24k-v1-a11y.pdf
Mineral Resources data portal:
· https://maps.conservation.ca.gov/cgs/minerals/
Here is the link to US Copper Corp's Moonlight-Superior Copper Project in Plumas County.
As for Claire's gemstone questions, the Benitoite Gem Mine in San Benito County is the only gemstone mine.
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Mark Trevor, PG, SME RM
Principal Geologist
Folsom CA United States
(510) 316-5732
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