Anna Beaver Mine, Ottawa County, Oklahoma, USAi

Regional Level Types
Anna Beaver Mine	Mine
Ottawa County	County
Oklahoma	State
USA	Country

Anna Beaver Mine, Picher Field, Tri-State Mining District, USA

Anna Beaver Mine, Tri-State Mining District, USA

The Anna Beaver Mine, Anna Beaver Mines Company, is located on a 200 acre lease, forming the NE. 1/4 and the SE. 1/4 NW. ¼ of sec. 19, T. 29 N., R. 23 E. Mining was started in 1917 and the production from 1917 to 1928 was 108,469 tons of zinc concentrates valued at $4,463,928 and 36,719 tons of lead concentrates valued at $3,668,538.

The Miami syncline extends from the southwest to the northeast part of the 160 acres forming the NE. 1/4 of Sec. 19. The mine workings are located on both sides of the syncline but to 1927 no ore-body had been developed in the bottom of the trough. Only the workings operated from shafts 1, 4, 8, 9, 11, and 15 were visited by the writer in 1927.

The principal mining level in shaft 8, located on the west side of the trough, is 215 feet below the surface, except in workings southeast of the shaft where the levels step down to 225, 255, and 245 feet below the surface in following the Boone strata as it dips southeast toward the axis of the trough. The stopes vary from twenty-five to 150 feet in width and from fifteen to sixty feet in height. The ore is mainly the jasperoid breccia, the floors of the stopes being in flint and the roofs in dolomitic limestone. Shale of Boone formation one to six feet thick occurs in a stope near shaft 4.

Shaft 9 is about 720 feet east of shaft 8 and on the eastern or opposite side of the trough. The mining level at the bottom of shaft 9 is 207 feet below the surface descending to a lower level of 230 feet southwest of the shaft as the bottom of the trough is approached. The Cherokee shale in the bottom of the trough between shafts 8 and 9 reaches a maximum thickness of 230 feet, as determined by drill records. The stopes northeast of the shaft ascend to a higher level of 180 feet. Where the level is 180 feet below the surface northeast of the shaft the shale has a thickness of seventy- five feet, and where it is 230 feet below the surface, southwest of the shaft, the shale has a thickness of 165 feet. The stopes have a usual width of forty to eighty feet and a height of twenty to thirty feet. The ore is partly jasperoid breccia associated with limestone.

In shaft 4, about 720 feet southwest of shaft 8, the principal mine level is 215 feet below the surface, the levels stepping down to the southwest, to 245 feet, in following the ore along the general dip of the Boone to the westward.

The mine level in shaft 11 on the east side of the trough varies from 209 to 240 feet below the surface. The stopes range from thirty to one hundred feet in width and from twenty to thirty feet in height.

The ore mined in the various parts of the lease appears to be in a zone about one hundred to 125 feet below the base of the shale. As there is usually thirty to fifty feet of Mayes formation between the Cherokee shale and the Boone formation the ore mainly lies in the upper beds of the Boone formation. In some places, however, the ore reaches up into the silicified Mayes limestone, the ore being mainly galena, in typical “sandspar.” About 300 feet southeast of shaft 9 mainly lead ore occurs at 155 to 175 feet below the surface passing down into mainly zinc ore at 175 to 195 feet. In this locality, however, drill records show a thickness of only sixty-five feet of shale hence the lead ore is probably within the upper part of the Boone formation.

In exploring for ore in the area of the deep shale, in the bottom of the syncline, sufficient drilling should extend to depths of one hundred to 150 feet below the shale in order adequately to explore the ore-bearing zone in the Boone and Mayes formations which underlies the bottom of the trough, as previously suggested under prospecting.