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Methods and costs of mining at Hartley-Grantham mine, tri-state zinc and lead district
Mine is located just outside city limits of Baxter Springs, Kan.; zinc and lead sulphides occur in brecciated, loose, bouldery formation of flint in channel or trough of brown limestone; prospecting by churn drilling; development; mining methods; detailed cost data.
Methods and costs of mining at Hartley-Grantham mine, tri-state zinc and lead district
Mine is located just outside city limits of Baxter Springs, Kan.; zinc and lead sulphides occur in brecciated, loose, bouldery formation of flint in channel or trough of brown limestone; prospecting by churn drilling; development; mining methods; detailed cost data.
Methods and costs of mining at Hartley-Grantham mine, tri-state zinc and lead district
U. S. Bureau Mines -- Information Cir
Keener, O.W. (author)
1930
8 pages
8 Figs. on Supp. plates
Article (Journal)
English
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