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Molybdenum in the United States, exclusive of Alaska and Hawaii
Robert Ugstad King
1970, Mineral Investigations Resource Map 55
The accompanying map shows the principal deposits and many minor occurrences of molybdenum in the conterminous United States. Six types are distinguished by shapes of the symbols used, and three size categories indicate the relative importance of the deposits....
Results of geochemical sampling in the western Clearwater Mountains, Alaska
Thomas E. Smith
1970, Open-File Report 70-310
Two centers of gold mineralization in the Clearwater Mountains have been identified during a recent geochemical sampling program in the Healy A-1, B-1 quadrangles, Alaska. Both the Timberline Creek center and the Black Creek center are located near the same E-W trending fault system.Sites of structural weakness along the zone...
Analyses of rock and stream-sediment samples from the Sumdum C-4 Quadrangle, Alaska
Allen L. Clark, David A. Brew, Donald A. Grybeck, Raymond Wehr
1970, Open-File Report 70-76
Analytical data for 31 rock and 33 stream-sediment samples from the Sumdum C-4 , 1:63,360 scale quadrangle are presented in this report, together with a statistical treatment of the data. The samples were collected in 1969 as part of the Heavy Metals Program of the U.S. Geological Survey.The most comprehensive...
Petrology of the Plutonic Rocks of west-central Alaska
Thomas P. Miller
1970, Open-File Report 71-210
A series of plutons in west-central Alaska defines the Hogatza plutonic belt which extends for about 200 miles in an east-west direction from the northeastern Seward Peninsula to the Koyukuk River. The plutonic rocks have an aggregate area of about 1,200 square miles and their composition, distribution, and possible petrogenesis...
Flood frequency in Alaska
J.M. Childers
1970, Open-File Report 70-63
Records of peak discharge at 183 sites were used to study flood frequency in Alaska. The vast size of Alaska, its great ranges of physiography, and the lack of data for much of the State precluded a comprehensive analysis of all flood determinants. Peak stream discharges, where gaging-station records were...
Lead-, zinc-, and barite-bearing samples from the western Brooks Range, Alaska, with a section on petrography and mineralogy
Irvin L. Tailleur, Ray Wehr, G. Donald Eberlein
1970, Open-File Report 70-319
Concentrations of base metal and barite of potential economic significance may be present in the western De Long Mountains, northwestern Alaska. Greater than 2 percent lead and 1 percent zinc were detected semiquantitatively in sulfide-bearing hand samples from one locality, and more than 10 percent lead was analyzed in a...