Determination of gold in geologic materials by solvent extraction and atomic-absorption spectrometry
Claude Huffman, J.D. Mensik, L.B. Riley
1967, Circular 544
The two methods presented for the determination of traces of gold in geologic materials are the cyanide atomic-absorption method and the fire-assay atomic-absorption method. In the cyanide method gold is leached with a sodium-cyanide solution. The monovalent gold is then oxidized to the trivalent state and concentrated by extracting into...
Magnitude and frequency of floods in the United States: Part 11. Pacific slope basins in California — Volume 2. Klamath and Smith River basins and Central Valley drainage from the east
L. E. Young, R.W. Cruff
1967, Water Supply Paper 1686
No abstract available....
Magnitude and frequency of floods in the United States, part 11. Pacific slope basin in California: Vol.1. Coastal basins south of the Klamath River basin and Central Valley drainage from the West
L. E. Young, R.W. Cruff
1967, Water Supply Paper 1685
No abstract available....
A simple mercury vapor detector for geochemical prospecting
William W. Vaughn
1967, Circular 540
The detector utilizes a large-volume atomic-absorption technique for quantitative determinations of mercury vapor thermally released from crushed rock. A quartz-enclosed noble-metal amalgamative stage, which is temperature controlled and is actuated by a radio-frequency induction heater, selectively traps the mercury and eliminates low-level contamination. As little as 1 part per billion...
Ground water of the Piedmont and Blue Ridge provinces in the Southeastern States
H. E. LeGrand
1967, Circular 538
Gold-bearing sedimentary rocks in northwest Wyoming — A preliminary report
J.C. Antweiler, J. D. Love
1967, Circular 541
No abstract available....
Geologic map of the Belted Peak quadrangle, Nye County, Nevada
E. B. Ekren
1967, Geologic Quadrangle 606
Measurement of peak discharge at dams by indirect methods
Harry Hulsing
1967, Techniques of Water-Resources Investigations 03-A5
This chapter describes procedures for measuring peak discharges using dams, weirs, and embankments. Field and office procedures limited to this method are described. Discharge coefficients and formulas are given for three general classes of weirs-sharp-crested, broad-crested, and round-crested-and for highway embankments and weirs of unusual shape. The effects of...
Distribution of gold, tellurium, silver, and mercury in part of the Cripple Creek district, Colorado
Garland Bayard Gott, J. H. McCarthy, G.H. Van Sickle, J. B. McHugh
1967, Circular 543
Geochemical exploration studies were undertaken in the Cripple Creek district to test the possibility that large low-grade gold deposits might be found. Surface rock samples taken throughout the district indicate that the volcanic rocks between the productive veins contain an average of about 0.6 ppm (part per million) gold. In...
Quality of surface waters of the United States, 1963, Parts 1 and 2, North Atlantic slope basins and south Atlantic slope and eastern Gulf of Mexico basins
S. K. Love
1967, Water Supply Paper 1947
The aeration capacity of streams
W. B. Langbein, W. H. Durum
1967, Circular 542
Reports and maps of the Geological Survey released only in the open files, 1966
Betsy A. Weld, Margaret S. Griffin, George W. Brett
1967, Circular 528
Instructions for using the punchcard system for the storage and retrieval of ground-water data. (NOTE: This publication is no longer maintained, USGS Library still has a copy)
Solomon Max Lang, Alvin Riley Leonard
1967, Techniques of Water-Resources Investigations 7-A
General field and office procedures for indirect discharge measurements
M. A. Benson, Tate Dalrymple
1967, Techniques of Water-Resources Investigations 03-A1
The discharge of streams is usually measured by the current-meter method. During flood periods, however, it is frequently impossible or impractical to measure the discharges by this method when they occur. Consequently, many peak discharges must be determined after the passage of the flood by indirect methods, such as slope-area,...
Measurement of peak discharge at width contractions by indirect methods
Howard Frederick Matthai
1967, Techniques of Water-Resources Investigations 03-A4
This chapter describes procedures for measuring peak discharges using open-channel width contractions. Field and office procedures limited to this method are described. The discharge equation based on the continuity and energy equations between an approach cross section and the contracted section under a bridge or contraction is given. Contractions...
Quality of surface waters of the United States, 1961, Parts 1 and 2: North Atlantic slope basins and South Atlantic slope and Eastern Gulf of Mexico basins
S. K. Love
1967, Water Supply Paper 1881
Quality of surface waters of the United States, 1961, Parts 7 and 8, Lower Mississippi River basin and western Gulf of Mexico basins
S. K. Love
1967, Water Supply Paper 1884
Uranium reserves and progress in exploration and development
Arthur Pierce Butler
1967, Circular 547
Measured sections of the Barstow Formation, Mud Hills, San Bernardino County, California
Richard A. Sheppard
1967, Open-File Report 67-200
Quaternary geology of the Grand-Battlement Mesa area, Colorado
Warren E. Yeend
1967, Open-File Report 67-282
No abstract available....
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...
Log of diamond drill core, Hole Number 1, Lahuf mine, Saudi Arabia
P. K. Theobald Jr., Charles Emmet Thompson, Louis Gonzalez
1967, Open-File Report 67-216
Geologic status report, April 1965, Mahad Adh Dhahab area, Saudi Arabia
P. K. Theobald Jr.
1967, Open-File Report 67-215
No abstract available. ...
Preliminary report on mid-Tertiary rhyolite vents and associated mineralization south of Georgetown, Colorado
Richard B. Taylor, Robert Ugstad King
1967, Open-File Report 67-209
No abstract available. ...
Seismic measurements of explosions in the Tatum Salt Dome, Mississippi
Roger D. Borcherdt, J. H. Healy, W. H. Jackson, D.R. Warren
1967, Open-File Report 67-24
Project Sterling provided for the detonation of a nuclear device in the cavity resulting from the Salmon nuclear explosion in the Tatum salt dome in southern Mississippi. It also provided for a high explosive (HE) comparison shot in a nearby drill hole. The purpose of the experiment was to gather...
