The Porphyry Hill is a gold mine located in Mariposa county, California.
About the MRDS Data:
All mine locations were obtained from the USGS Mineral Resources Data System. The locations and other information in this database have not been verified for accuracy. It should be assumed that all mines are on private property.
Primary Mineral: Gold
Lat, Long: 37.64167, -119.52222
Active Mining Claims
Claim data is for Mines level premium members.
Porphyry Hill MRDS details
Site NamePrimary: Porphyry Hill
Operation Category: Producer
Operation Type: Unknown
Years of Production:
PhysiographyGeneral Physiographic Area: Pacific Mountain System
Physiographic Province: Cascade-Sierra Mountains
Physiographic Section: Sierra Nevada
Mineral Deposit Model
|Comment: ACTIVE 1901, 1905, 1907-10, PRODUCING 37.97 TONS OF ORE YIELDING $2164.48, OR AN AVERAGE OF $57.09 PER TON.|
|Comment: WORKINGS COULD NOT BE IDENTIFIED IN 1954-55. FORMER LAS MARIPOSAS GRANT MINE.|
Reference Category: Deposit
Reference: CALIF. JOUR. MINES & GEOLOGY, V. 53, NOS. 1 & 2, JAN.-APRIL, 1957, P. 297