French Creek Mines
Saint Peters, Warwick Township, Chester County, Pennsylvania, USA
Key Information
Do not enter mining areas without proper authorization.
The French Creek Mines are located in St. Peters Village, Warwick Township, Chester County, Pennsylvania, about 45 miles west of Philadelphia, near French Creek State Park and Hopewell Furnace National Historic Site.
They are known for minerals like chalcopyrite, pyrite, magnetite, and uncommon ones like erythrite and chrysotile.
The geological structure involves a "Cornwall-type" iron ore deposit with magnetite skarn from Proterozoic marble, influenced by Triassic sediments and Jurassic diabase.
Mining started in 1717, ended in 1928, and was small-scale, focusing on magnetite, with dumps later used for specimen collecting until 1989.
St. Peters Village is a historic company town with artisan shops and natural attractions, set in a humid continental climate with hot summers and cold winters.
Location and Accessibility
St. Peters Village, home to the French Creek Mines, is nestled in Chester County, Pennsylvania, roughly 45 miles west of Philadelphia. This location places it in a scenic area near French Creek State Park and the Hopewell Furnace National Historic Site, making it accessible for enthusiasts looking to explore both mineral sites and historical landmarks.
Mineral Highlights
The mines are celebrated for their diverse mineralogy, featuring spectacular chalcopyrite, fine cubic and octahedral pyrite, and octahedral magnetite crystals. Uncommon minerals like erythrite and chrysotile add to the allure, offering unique finds for collectors. For a comprehensive list, visit Mindat.
Geological Context
Research suggests the French Creek Mines are part of a "Cornwall-type" iron ore deposit, characterized by magnetite skarn developed from Proterozoic marble, with geological influences from Late Triassic sediments and Early Jurassic diabase intrusions. This setting has created a rich environment for mineral formation.
Historical Mining Operations
Mining operations began in 1717 and ceased in 1928, operating on a small scale as part of the Hopewell Furnace National Historic Site, focusing on magnetite extraction. Post-closure, the dumps were a source for mineral specimens until collecting was restricted in 1989, as noted on The Diggings.
Cultural and Environmental Setting
St. Peters Village, a historic company town, now features artisan shops, galleries, and the Inn at St. Peter’s Village, offering a glimpse into its past as a mining community. The area enjoys a humid continental climate with hot, humid summers and cold, snowy winters, surrounded by natural attractions like French Creek State Park and the Hopewell Big Woods, enhancing its appeal for nature lovers.