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New York talcs, their geological features, mining, milling, and uses

Engel, A. E. J. (1949) New York talcs, their geological features, mining, milling, and uses. Mining Transactions, 184 . pp. 345-348.

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The New York talc deposits of commercial importance are in St. Lawrence and Lewis counties, in the northwest Adirondack Mountains (Fig 1). All of the deposits are of pre-Cambrian age and occur within highly deformed and recrystallized marble of the Grenville series. The deposits in St. Lawrence County, near Gouverneur, are the largest and most productive of their type known in the Western Hemisphere. In 1948 the seven mines which are in operation will produce about 130,000 tons of ground talc. All talc production in Lewis County is from one mine. There the annual production ranges from 15,000 to 30,000 tons. These so called talcs of New York State include earth materials of different chemical and mineral compositions. In general the mineral talc is subordinate in amount to other minerals in both the Gouverneur and Natural Bridge deposits. In the Gouverneur district the mineral talc comprises less than 25 pct of the mined and ground rock. Most of the rock mined is a tremolite- or tremolite-anthophyllite schist somewhat altered to serpentine and talc.

Item Type:Article
Additional Information:© 1949 American Institute of Mining Engineers. The writer's studies of New York talcs were undertaken for the U. S. Geological Survey, and welcomed and enlivened by the staffs of mining companies in the New York districts. I also wish to acknowledge the inestimable contributions to my efforts made by H. M. Bannerman, C. N. Bozion, A. F. Buddington, James Page and many other members of the U.S. Geological Survey.
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ID Code:114201
Deposited By: Tony Diaz
Deposited On:08 Apr 2022 22:50
Last Modified:08 Apr 2022 22:50

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