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By Arthur Baker

The orebodies are long bedding-plane lenses of chalcopyrite and sphalerite, associated with garnetite masses. Most of the orebodies are within a 50-ft thickness of Cambrian limestone; other Paleozoic limestones and dolomites are locally metamorphosed but only slightly mineralized. Pre-mineral faults are numerous, but shallow folds were the main ore-localizing structures.

Jan 12, 1953

Jan 1, 1970

Jan 1, 1922

NEW MEMBERS. The following list comprises the names of those persons who became members during the month of November, 1913: Members. AGNEW, JOHN L., Gent Supt Copper Cliff, Ont., Canada. BAILEY, FRANK C, Mine Mgr 2003 IV. Snito Ave., Spokane, Wash. BATEMAN, ALAN M., Min. Geol.,Care L. C. Graton, Geological Museum, Cambridge,Mass. BERRYHILL, JAMES G.,Atty.-at-law and Mining Investor, Equitable Bldg., Des Moines, Ia. CARTLIDGE, OSCAR, Mgr. State Mine Rescue Station, 452 W. South Grand Ave.. Springfield. Ill.

Jan 12, 1913

Jan 1, 1909

Jan 1, 1915

Elected Died 1895 *ABBOTT, AI ATTHUR 1908 1882 *ABBOTT, ARTHUR V 1906 1905 * ABE, MASAYOSHI 1909 1903 * ADAMS, CHARLES C. 1905 1906 * ADAMS, JOHN C. 1913 1905 * ADAMS, WILLAMS 1909 1903 * ADAMS, W. EDWARDS 1910 1884 *ADDY, MATTHEW 1896 1906 * AFFLECK, WILLIAM A. 1911 1889 * AKERS, WILLIAMS 1906 1905 * ALABASTER, RUPPERT C. 1911 1899 * ALBERGER, LOUIS R. 1911 1894 *ALLEN R B 1896 1905 * ALLEN, R. SCOTT 1906 1874 * AMIOT, H. 1892 1886 *AMSLER, CARL 1894 1898 ** ANDRSON, JOHN W 1905 1895 *ÅNGSTROM, CARL 1901 1887 * ARCHBALD, JAMES 1910 1900 * ARLETT, GEORGE H 1906 1895 *ARMSTRONG, JOHN F 1898 1882 *ARNOLDS, HUGO 1886 1875 *ASHBURNER, CHARLES A 1889 1872 *ASIIBURNER, WILLIAM 1887 1883 *ATKINS, C M , JR 1885 1905 * AUSTEN, PETER T 1907

Jan 1, 1917

By J. W. White, J. M. Richardson

Mass balance calculations on industrial grinding circuits are routinely performed during circuit design as well as during post-installation evaluation of operating circuits. Though such routine mass balances are straight- forward, a systematic approach can yield substantial long-term benefits. This chapter presents and evaluates several approaches useful for achieving various circuit design objectives and also considers several methods for reconciliation of data collected around an operating circuit. Numerical examples illustrate the basic concepts and techniques.

Jan 1, 1982

NEW MEMBERS. The following list comprises the names of those persons who became members during the month of June, 1913: Members. ANGERER, VICTOR, Vice-Prest. and Genl. Mgr., Wm. Wharton, Jr. &, Co., Inc., 25th St. and Washington Ave., Philadelphia, Pa. BULLOCK, ALLYN, Min. Engr., Hazleton, Pa. CUNNINGHAM, NOEL Met. Engr. Hollinger Gold Mines Ltd., Timmins, Ont Canada ESTABROOK, EDWARD L., Supt. of Colliery 426 Center St., Ashland, PA. GATES A. O. Instructor Purdue Univ. La Fayette Ind. 1 LUDLUM, ALBERT C., Prest., New York Engrg. Co., ,2 Rector St., New York, N. Y. MILLER, HERBERT F., Met. Engr P. O. Box 142, Verona, Pa. MORTON, ELMER T., Min. Engr Clifton, Ariz. MURFIT, RICHARD H.. Fdv. Asst Hess Steel Castings Co., Bridgeton, N.J. QUAYLE, THEODORE W., Chief Sampler, Metcalf Mines, Arizona Copper Co., Metcalf, Ariz.

Jan 7, 1913

By Jacques Friedel

Jan 1, 1964

West Virginia University, Engineering Experiment Station, Morgantown, W Va C E Lawall, Director. For copies of Bulletins or other information address the Director Two classes of the Bulletins published by the Engineering Experiment Station are of particular interest in this directory- Research Bulletins, and Extension Bulletins, or bulletins published for use in extension work They are. Research Bulletin 1, The conservation of natural gas in West Virginia (1918), 2, Acceleration stresses in hoisting ropes (1927), 3, Classification of gas wells for operation (1927), 4, Mining methods in West Virginia (1929), 5, The whiteware industry of West Virginia, Extension Bulletin 1, Electricity in mines, series

Jan 1, 1933

The Institute is desirous of securing the photographs of Adolph Patera and Albert Serlo, two deceased honorary members of the Institute. All resources within the ken of the Secretary have been tried out to secure these photographs without avail. If any, of our members can give us suggestions which will lead to the accomplishment of the desired ends, such suggestions will be much appreciated.

Jan 5, 1919

By W. C. Lacy

THE Cuajone porphyry copper deposit is the northernmost of a group of three deposits in southern Peru controlled by the Southern Peru Copper Corp.-Toquepala, Quelleveco, and Cuajone- all within a 20-mile belt. Although small pockets of high-grade copper oxide ores were worked in the Cuajone area in the 19th century, it was not until 1939 that its potentialities as a disseminated deposit were recognized by O. C. Schmedeman. An exploratory drilling program was begun in December 1942 and continued until early 1945. The program was revived in November 1952 and completed early in 1954. Early exploration was by diamond drilling. Later exploration was predominantly churn drilling, with diamond drilling used only for wildcat holes.

Jan 1, 1958

Jan 1, 1951

Jan 1, 1951

By Omar A. Muhtadi

Experimental statistical designs were used at Zortman Mining Company's, Zortman, Montana, heap-leach operation to establish functional relationships between key operating parameters and gold/silver recoveries. Zinc feed rate, lead feed rate, and vacuum (CFM/gpm) account for 64% and 67% of the attainable gold and silver recoveries, respectively. Surface response graphs of the resulting polynomials were plotted. These graphs were used to optimize Zortman's Merrill-Crowe precipitation process.

Jan 1, 1984

By George W. Toth

This paper describes the features of a computer cost model developed to estimate requirements and costs of individual coal mining projects. Detailed cost analysis procedures for both coal mining and preparation are incorporated into the model. This model has been developed over a period of seven years through funding provided by the Electric Power Research Institute (EPRI). The model follows a process engineering approach for the estimation of all project capital and operating costs. A discounted cash flow analysis procedure is also designed into the model to allow for the solution of cost/ton or cost/MMBtu of clean coal production. The model can be applied to most surface or underground mining deposits and can accommodate a wide variety of coal washing situations. This flexibility makes the model a particularly useful tool for preliminary project analysis, property screening, investment analysis, mining technology assessment, coal cleaning level assessment, and general property valuation.

Jan 1, 1983

Robert Annan is an Englishman who started his brilliant mining career in Arizona, yet achieved the pinnacle of success in his native land when he became chairman of The Consolidated Gold Fields of South Africa. This story of his life, prepared in collaboration with the late Henry Carlisle, continues this fascinating biographical series of important personalities in the mining industry.

Jan 12, 1964

By Harold B. Ewoldt, Robert R. Reynolds

THE Upper Mississippi Valley zinc-lead district covers an area of some 2000 sq ml located in the southwestern corner of Wisconsin, the north-western corner of Illinois and a portion of eastern Iowa around the city of Dubuque. Commercial deposits of lead and zinc have been mined in Iowa but the major discoveries during the past eight years have been made in Jo Daviess County, Ill, and LaFayette County, Wis. Activities in the state of Illinois are centered about the city of Galena, while those in Wisconsin are located a few miles south and west of the town of Shullsburg.

Jan 3, 1951

Jan 1, 1955