Our mineral reserves

Bibliographic data

Monograph

Identifikator:: 867029366

URN:: urn:nbn:de:zbw-retromon-93011

Document type:: Monograph

Author:: Smith, George Otis http://d-nb.info/gnd/117634530

Title:: Our mineral reserves

Place of publication:: Washington, DC

Publisher:: Gov. Print. Off.

Year of publication:: 1914

Scope:: 1 Online-Ressource (48 Seiten)

Collection:: Economics Books

Usage license:: Get license information via the feedback formular.

MINERAL PRODUCTS. 17 in Arkansas, and the Livermore and Tesla districts in California. Districts of minor importance are the New River region in Virginia, the northeastern Tennessee region, the McCormick region in South Carolina, and the Little Grande district in Utah. Mining and ship ping in Virginia are now confined to the Blue Ridge and James River-Staunton River regions. Manganiferous iron ores consist of mixtures of manganese and iron oxides and hydrous oxides, which, though usually containing manganese in excess of 5 per cent, may contain as little as 1 per cent. The proportion of iron in such ores is highly variable, but usually exceeds 40 per cent. Manganiferous iron ores occur in the United States chiefly in the New England, Appalachian, and Lake Superior regions, and minor deposits are found in the southern part of the Mississippi Valley and in the Rocky Mountain region. High-grade manganiferous iron ore used for its manganese content occurs in the Appalachian region. Other manganiferous iron ores, which are so low in manganese that they are classed as iron ores, are produced in the Appalachian and Lake Superior districts. In the blast fur nace they yield a " high-manganese " pig iron, which is used for special purposes. ' Manganiferous silver ores consist of mixtures of manganese and iron oxides and hydrous oxides, with small quantities of silver and lead minerals. As a rule the iron content exceeds the manganese content, but locally the iron is altogether absent. Manganiferous silver ores occur in the Rocky Mountain and Great Basin regions, the principal producing locality being Lead ed lie, Colo. Leadville ores have been used in making spiegeleisen from time to time, but none are now used for this purpose. Manganiferous zinc residuum is an artificial furnace product con sisting of manganese and iron oxides in a matrix of slag. It is obtained from zinc volatilizing and oxidizing furnaces using New Jersey zinc ores. Small quantities of zinc residuum are used annu ally in the manufacture of spiegeleisen. Bulletin 427 of the United States Geological Survey (“ Manganese Deposits of the United States,” by E. C. Harder), which is still available for free distribution, contains brief descriptions of most of the known deposits of manganese in this country and the impor tant deposits of other countries, and concise summaries of the chem istry and mineralogy of manganese. ZINC. By a queer coincidence the great smelting centers of continental Europe are in regions where active fighting is now going on or may be expected in the near future. The zinc smelters of Upper Silesia are in the extreme southeastern portion of Prussia, mostly in the 50170°—Bull. 599—14 2

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