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Page 4695, results 117351 - 117375

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Not all publications have extents, not all extents are completely accurate
Water-resources investigations in North Dakota; fiscal year 1983
Nancy K. Lankford, Luverne L. Albright
1983, Open-File Report 83-220
All ongoing water resources projects in North Dakota in fiscal year 1983, are listed. The report was prepared to inform interested federal, State, and local agencies and private individuals of the activities of the Water Resources Division in the State. Information on each project includes objectives, approach, progress in 1982,...
Time-domain electromagnetic tests in the Wadi Bidah District, Kingdom of Saudi Arabia
Vincent J. Flanigan, Hamdy Sadek, Bruce Smith, C. L. Tippens
1983, Open-File Report 83-613
A time-domain electromagnetic (TDEM) method was tested in two areas of mineralization in Precambrian rocks in the Wadi Bidah district, Kingdom of Saudi Arabia. Transient-decay voltages in profile mode were measured across the Sha'ab at Tare and Rabathan prospects by use of three transmitterreceiver loop configurations. At the Sha'ab at...
Geological and geochemical studies in the Wadi Bidah District, Kingdom of Saudi Arabia
C. W. Smith, B.C. Waters, M. Naqvi, R. G. Worl, A. M. Helaby, V. J. Flanigan, H.S. Sadek, R.M. Samater
1983, Open-File Report 83-672
Geological and geochemical followup studies of airborne electromagnetic anomalies in the Wadi Bidah district, southwestern Saudi Arabia, did not reveal metals of economic grade. Investigation of an anomaly enclosing the Rabathan ancient mine disclosed tightly folded and sheared Proterozoic tuffaceous rocks interlayered mostly with chert, dolomite, carbonaceous rocks, and volcanic...
Summaries of technical reports, Volume XV
Muriel L. Jacobson (compiler), Thelma R. Rodriguez, Wanda H. Seiders
1983, Open-File Report 83-90
The research results described in the following summaries were submitted by the investigators on November 15, 1982 and cover the 6-month period from April 1, 1982 through September 30, 1982. These reports include both work performed under contracts administered by the Geological Survey and work by members of the Geological Survey. The report summaries...
Geochronology, geochemistry, and tectonic environment of porphyry mineralization in the central Alaska Peninsula
Frederic H. Wilson, Dennis P. Cox
1983, Open-File Report 83-783
Porphyry type sulfide systems on the central Alaska Peninsula occupy a transition zone between the Aleutian island magmatic arc and the continental magmatic arc of southern Alaska. Mineralization occurs associated with early and late Tertiary magmatic centers emplaced through a thick section of Mesozoic continental margin clastic sedimentary rocks. The...
A summary of ground-water pumpage in the Central Valley, California, 1961-77
Jonathan Diamond, A. K. Williamson
1983, Water-Resources Investigations Report 83-4037
In the Central Valley of California, a great agricultural economy has been developed in a semiarid environment. This economy is supported by imported surface water and 9 to 15 million acre-feet per year of ground water. Estimates of ground-water pumpage computed from power consumption have been compiled and summarized. Under...
Reconnaissance geologic map of the Jabal Zain Quadrangle, sheet 20/44A, Kingdom of Saudi Arabia
Maurice R. Brock
1983, Open-File Report 83-639
Late Precambrian rocks of the Jabal Zain quadrangle comprise two distinct terranes separated by a broad cataclastic zone that formed during the latest Precambrian Najd strike-slip faulting. Only minor gold-silver prospects have been located in the quadrangle, and the potential for larger depostts is considered low. North of the Najd fault...