3 Matching Results

Search Results

Preliminary Report on the Jo Reynolds Area, Lawson-Dumont District, Clear Creek County, Colorado

Description: From abstract: Pitchblende is known to occur in the Jo Reynolds deposit, which was primarily a lead-zinc-silver ore body. The reported production in 1919 of 8 tons of high-grade uranium ore, presumably from the lowest workings of the mine, is still unconfirmed but has a fair degree of credibility.
Date: March 1952
Creator: Harrison, Jack Edward & Leonard, B. F.
Partner: UNT Libraries Government Documents Department

Radioactivity in the Jo Reynolds Mine, Clear Creek County, Colorado

Description: From abstract: Eight tons of high grade pitchblende ore was sold from the Jo Reynolds mine near Lawson, Clear Creek County, Colo., in 1919. The pitchblende occurs with silver, lead, and zinc in carbonate-quartz veins cutting pre-Cambrian schist, granite gneiss, and granite.
Date: January 1951
Creator: King, Robert Ugstad
Partner: UNT Libraries Government Documents Department

The Uranium Occurrences in the Martha E Prospect, Lawson-Dumont District, Clear Creek County, Colorado

Description: From introduction: The Martha E prospect, in Spring Gulch about three and one-half miles southwest of Idaho Springs, Colo. (fig. 1), is on a claim, originally called the Daisy Freese, which was first prospected by the Stanley Mines. The occurrence of radioactive minerals in the adit was called to the attention of the U. S. Geological Survey in 1950 by the owners of the claim. The Survey's Trace Elements Section Washington Laboratory identified metatorbernite, autunite, and sooty pitchblende.
Date: April 1952
Creator: Harrison, Jack Edward
Partner: UNT Libraries Government Documents Department