Standard Lead and Zinc Company (Standard Mine), Belleville Camp, Jasper County, Missouri, USAi

Regional Level Types
Standard Lead and Zinc Company (Standard Mine)	Mine
Belleville Camp	Mining Sub-district
Jasper County	County
Missouri	State
USA	Country

Standard Lead and Zinc Company (Standard Mine), Belleville Camp, Tri-State Mining District, USA

The shafts of this company are located in the N. 1/2 of the NE. 1/4 of section 25, on the hill slopes north of Turkey creek, and probably less than 100 ft. above the valley. This is one of the largest mines of the group.

At the time of inspection the bottom of the shaft was about 150 feet below the surface, but we are informed that since that time it has been sank 50 feet deeper, in chert. The drift was at the 150-foot level, and the excavation was very large and high, reaching as much as 70 feet or more in some places. The gangue was hard, consisting of a black, impure, secondary chert, cementing fragments of the original white chert; clay or shale was also sometimes found in this breccia; the matrix is often calcareous to the extent of being a crystalline limestone. This ore body or breccia lies between walls or "bars” of limestone which are encountered in drifts. In No. 2 shaft a limestone bed was struck at a depth of only 40 or 50 feet, which proved to be about 10 feet thick; under this the ore breccia was found. The principal metalliferous constituent is blende, which is found in the siliceous matrix of the breccia, and bedded in clay in the spaces between the chert fragments; almost no galena is found; some pyrite occurs, and was seen to be deposited on blende in places; a little dolomite was observed, and calcite crystals are also found.