Economic Geology of the French Gulch Quadrangle – Shasta and Trinity Counties, California

Historic Mining, Mineral Deposits and Geologic Information for Northern California

Economic Geology of the French Gulch Quadrangle is a detailed technical report covering the geology, mineral resources, mines, prospects, and mining history of portions of Shasta and Trinity Counties, California.

Originally published in 1965 as California Division of Mines and Geology Special Report 85, this reference examines an historically productive region known for gold, silver, copper, zinc, pyrite, and placer deposits. It is a useful resource for prospectors, geologists, researchers, mining-history enthusiasts, and anyone studying Northern California’s historic mineral districts.

Report Coverage

• Regional geology of the French Gulch Quadrangle

• Geologic formations and intrusive rock bodies

• Faults, folds, foliation, and other structural features

• History of mining in the region

• Gold- and silver-bearing quartz veins

• Copper-zinc massive sulfide deposits

• Placer-gold deposits

• Individual mines and prospects

• Geophysical study of the Iron Mountain Mine

• Areas considered geologically favorable for prospecting

Mining Districts Discussed

• French Gulch–Deadwood District

• Muletown District

• South Fork District

• Whiskeytown District

• West Shasta copper-zinc region

The report discusses numerous historic properties, including the American, Brown Bear, Brunswick, Gladstone, Franklin, Milkmaid, Niagara, Summit, Washington, Greenhorn, Iron Mountain, and other mines and prospects.

Maps and Illustrations

The original report contains geologic maps, mine plans, sections, longitudinal projections, geophysical diagrams, and illustrations showing the location and geology of important mines and mineralized areas.

Publication Details

• Full title: Economic Geology of the French Gulch Quadrangle, Shasta and Trinity Counties, California

• Primary author: John P. Albers

• Additional section by: C. H. Sandberg

• Publisher: California Division of Mines and Geology

• Series: Special Report 85

• Original publication year: 1965

• Subject: Economic geology, mining history, mines, mineral deposits, and prospecting

• Geographic area: French Gulch Quadrangle, Shasta and Trinity Counties, California

Ideal For

• Gold prospectors

• Rockhounds and mineral collectors

• Geologists and geology students

• Mining-history researchers

• Metal detectorists researching historic mining areas

• Libraries and California-history collections

Please Note: This is a historical geological reference. Mine ownership, land status, access routes, regulations, and claim boundaries may have changed since publication. Always verify current property ownership and obtain permission before entering or prospecting an area.

This book offers expert insight into the economic geology of the French Gulch Quadrangle in Shasta and Trinity Counties, California. With comprehensive coverage of the quadrangle's rich mineral resources, it is an essential resource for anyone interested in the economic potential of this region.