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Page 5867, results 146651 - 146675

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Publication Extents

Not all publications have extents, not all extents are completely accurate
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...
Ground-water aspects of the lower Henrys Fork region, Idaho
E.J. Crosthwaite, M.J. Mundorff, E.H. Walker
1967, Open-File Report 67-71
The lower Henrys Fork region includes the plains and low benches between Ashton and the junction of Henrys Fork and Snake River in eastern Idaho. The northwestern and western parts of the area are part of the Snake River lava plain. The central part of the area is occupied by...
Phosphate rock in Colombia - a preliminary report, with a section on the phosphate occurrence at Turmeque
James Bachelder Cathcart, Francisco Zambrano O., Pedro Mojica G.
1967, Open-File Report 67-43
Exploration for phosphate rock in Colombia was successfully carried out in 3 1/2 months by the U.S. Geological Survey and the Inventorio Minero of the Servicio Geologico Nacional, under the auspices of the U.S. Agency for International Development. A modern theory of exploration based on model studies of phosphorite deposits...
Progress report II: Assays and analyses of pyritic core from Wadi Wassat gossan, Saudi Arabia
William C. Overstreet, Sayyad Moutouq Bahijra, Mohammed A. Fourati, Louis Gonzales
1967, Open-File Report 67-174
Assays of 31 samples of pyritic core from diamond drill holes under gossan at Wadi Wassat, Saudi Arabia, disclosed 0.02 oz/ton gold in five samples, and from0.11 to 1.68 oz/ton silver in 23 samples: The tenors are too low to constitute ores of either metal. Further work is required to...