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Water resources of the Marquette Iron Range area, Michigan
Sulo Werner Wiitala, Thomas Gwyn Newport, Earl L. Skinner
1967, Water Supply Paper 1842
Large quantities of water are needed in the beneficiation and pelletizing processes by which the ore mined from low-grade iron-formations is upgraded into an excellent raw material for the iron and steel industry. Extensive reserves of low-grade iron-formation available for development herald an intensification of the demands upon the area's...
Geophysical ore guides along the Colorado mineral belt
James E. Case
1967, Open-File Report 67-39
A 40-50-mgal gravity low trends northeast along the Colorado mineral belt between Monarch Pass and Breckenridge, Colorado. The low is probably caused by a silicic Tertiary batholith of lower density than adjacent Precambrian crystalline rocks. Many major mining districts associated with silicic Tertiary intrusives are near the axis of the...
Preliminary geologic map of Ellipse II-6-1 and vicinity
M. J. Grolier
1967, Open-File Report 68-114
Site II P-6, which is in the southwestern part of Mare Tranquillitatis, is a mare area crossed by ridges and rays. Ellipse II-6-1 is north of the equator in the southwestern quadrant of the site. ...
Locations and descriptions of lode mines and prospects in the Fairbanks district, Alaska
Robert Mills Chapman, Robert Lutz Foster
1967, Open-File Report 67-44
This report has been compiled from data gathered in the field in September and October, 1966, and from a detailed survey of the various geologic and mining reports on the Fairbanks lode mining district. A number of people who are familiar with mining in this district have provided some additional...