Rush Creek Mining District, Marion County, Arkansas, USAi

Regional Level Types
Rush Creek Mining District	Mining District
Marion County	County
Arkansas	State
USA	Country

The Rush district, as the term has heretofore been understood, is a rather compact area extending from the Beulah mine and the town of Rush on the northwest to the Silver Hollow mine on the southeast. a distance of about 2 miles. The district, as thus restricted, includes the lower part of the Rush Creek Valley, the lower part of the Clabber Creek Valley, and the contiguous portions of the Buffalo River Valley.

Outside of the district proper there are several scattered deposits in the Rush Creek drainage basin above the town of Rush, and for the sake of completeness these deposits are included with the Rush Creek district in the present report. They occur at various horizons and in various types of rock in the Everton formation. Some are only prospects: others have produced ore. The Climax mine is the only one of them that is very closely connected with a fault.

The ore deposits of the restricted Rush district are related to the Rush Creek, Monte Cristo, and Silver Hollow faults but lie in ore runs in the vicinity of the faults rather than on the faults. The Edith-Yellow Rose deposit and the Red Cloud deposit are on the extended line of the Rush Creek fault, but beyond the point where it show any significant displacement. The deposits of the district, except the Beulah, occur chiefly in limestone and medium-grained dolomite in the Everton formation. The Red Cloud, Lonnie Boy, Leader, Philadelphia, Monte Cristo (upper ore zone) Capps, the upper level of the McIntosh, the uppermost level of the Morning Star (at the top of the open pit) and probably the Edith and Yellow Rose all lie at the same stratigraphic horizon-namely, in a discontinuously dolomitized limestone whose top is about 160 feet below the St. Peter sandstone. The top of the mineralized stratum also lies from 36 to 44 feet below the base of a sandstone ledge that ranges in thickness between 2 and 5 feet and averages about 4 feet. This sandstone serves as a convenient horizon for the Rush District. The ore shipped from the district has been preponderantly carbonate, but all the deposits carry more or less unoxidized jack, and this was the chief product of the Beulah, of the earlier workings at the White Eagle, and of the later workings in the Silver Hollow and Philadelphia mines. Statistics on the production of the district are incomplete, but an estimate of 26,000 tons of concentrates, based on partial statistics is believed to be conservative. Perhaps a quarter of this has been jack. Outlying mines in more distant parts of the Rush Creek drainage system amount for an additional 450 tons or so of carbonate and 80 tons of jack. The Rush Creek district has thus produced far more than any other in northern Arkansas.