Doughty Mine, Sunbury, Northumberland Co., Pennsylvania, USA
|Latitude & Longitude (WGS84):||40° 49' 57'' North , 76° 49' 22'' West|
|Latitude & Longitude (decimal):||40.8325, -76.8227777778|
An abandoned Pb-Zn mine operated during the mid 19th century, occurring in Helderberg limestone. Located along state route 147, South of Sunbury along the Susquehanna River, across from Selinsgrove.
There are four remaining adits which are unmanaged and considered too hazardous to enter.
Reportedly first discovered in the 1840's, ores recovered had been shipped east via the Pennsylvania canal, but the workings remained secretive until 1882 when Mr. Doughty of Shamokin (also noted as from Tamaqua?), undertook a systematic development of the ores. Ore occurred as "strings" and "pots" mixed with large amounts of muddy deposits, much resembling that deposited by turbid waters. Deposits ran almost directly E-W at nearly the crest of the Selinsgrove arch, about 10' above the base of the Bossardville Limestone. Both Lead and Zinc occurred chiefly as sulphides, minor copper as carbonate.
Analysis of ore conducted by McCreath in 1882 as follows: Metallic Pb - 24.191, Metallic Zn - 31.954, Metallic Cu - 1.389. (Ref. 2nd Geo. Surv., Geology of the Susquehana River Region, 1883, Pgs. 99-100)
14 valid minerals. 1 erroneous literature entry.
This geological map and associated information on rock units at or nearby to the coordinates given for this locality is based on relatively small scale geological maps provided by various national Geological Surveys. This does not necessarily represent the complete geology at this locality but it gives a background for the region in which it is found.
Click on geological units on the map for more information. Click here to view full-screen map on Macrostrat.org
|Middle Devonian - Early Devonian|
382.7 - 419.2 Ma
Age: Devonian (382.7 - 419.2 Ma)
Description: Includes, in descending order, the Mahantango (Dmh) and Marcellus (Dmr) Formations.
Reference: Horton, J.D., C.A. San Juan, and D.B. Stoeser. The State Geologic Map Compilation (SGMC) geodatabase of the conterminous United States. doi: 10.3133/ds1052. U.S. Geological Survey Data Series 1052. 
White (?) (1883), 2nd Geological Survey, Geology of the Susquehanna River Region: 99-100.
Gordon (1922), Mineralogy of Pennsylvania.