Publications
Products (journal articles, reports, fact sheets) authored by current and past scientists are listed below. Please check the USGS Pubs Warehouse for other USGS publications.
Filter Total Items: 1826
Geochemistry of hydrothermal alteration at the Qolqoleh gold deposit, northern Sanandaj–Sirjan metamorphic belt, northwestern Iran: Vectors to high-grade ore bodies
The Qolqoleh orogenic gold deposit in the northern part of the Sanandaj–Sirjan metamorphic belt in northwestern Iran is hosted by a steeply dipping sequence of greenschist facies Cretaceous volcano–sedimentary rocks, including mafic to intermediate metavolcanic rocks, sericite and chlorite schist, and marble. Geochemical and petrochemical data including the ∑ REE, (La/Yb)N and Eu/Eu* ratios were o
Authors
Farhang Aliyari, Ebrahim Rastad, Richard J. Goldfarb, Jafar Abdollah Sharif
Forecasting conditional climate-change using a hybrid approach
A novel approach is proposed to forecast the likelihood of climate-change across spatial landscape gradients. This hybrid approach involves reconstructing past precipitation and temperature using the self-organizing map technique; determining quantile trends in the climate-change variables by quantile regression modeling; and computing conditional forecasts of climate-change variables based on sel
Authors
Akbar Akbari Esfahani, Michael J. Friedel
Investigation of off-site airborne transport of lead from a superfund removal action site using lead isotope ratios and concentrations
Lead (Pb) concentration and Pb isotopic composition of surface and subsurface soil samples were used to investigate the potential for off-site air transport of Pb from a former white Pb processing facility to neighboring residential homes in a six block area on Staten Island, NY. Surface and subsurface soil samples collected on the Jewett White Pb site were found to range from 1.122 to 1.138 for 2
Authors
Michael J. Pribil, Mark A. Maddaloni, Kimberly Staiger, Eric Wilson, Nick Magriples, Mustafa Ali, Dennis Santella
Alternative waste residue materials for passive in situ prevention of sulfide-mine tailings oxidation: A field evaluation
Novel solutions for sulfide-mine tailings remediation were evaluated in field-scale experiments on a former tailings repository in northern Sweden. Uncovered sulfide-tailings were compared to sewage-sludge biosolid amended tailings over 2 years. An application of a 0.2 m single-layer sewage-sludge amendment was unsuccessful at preventing oxygen ingress to underlying tailings. It merely slowed the
Authors
Peter Nason, Raymond H. Johnson, Clara Neuschutz, Lena Alakangas, Bjorn Ohlander
Fractionation of fulvic acid by iron and aluminum oxides: influence on copper toxicity to Ceriodaphnia dubia
This study examines the effect on aquatic copper toxicity of the chemical fractionation of fulvic acid (FA) that results from its association with iron and aluminum oxyhydroxide precipitates. Fractionated and unfractionated FAs obtained from streamwater and suspended sediment were utilized in acute Cu toxicity tests on ,i>Ceriodaphnia dubia. Toxicity test results with equal FA concentrations (6 mg
Authors
Kathleen S. Smith, James F. Ranville, Emily K. Lesher, Daniel J. Diedrich, Diane M. McKnight, Ruth M. Sofield
Noble gas geochemistry investigation of high CO2 natural gas at the LaBarge Platform, Wyoming, USA
A regional sampling of gases from thermal springs near the LaBarge Field, Wyoming, USA to determine the extent of the total carbon dioxide system (TCDS) indicates that the system may extend up to 70 km to the northwest of the field. Geochemical evidence from noble gas isotopes, stable element isotopes, and gas composition provide the foundation for these conclusions. Samples from Soda Springs to t
Authors
Matthew D. Merrill, Andrew G. Hunt, Celeste D. Lohr
Sampling considerations in the mining environment
No abstract available.
Authors
Kathleen S. Smith, Virginia T. McLemore, Carol C. Russell
Data management, assessment, and analysis for decision-making
No abstract available.
Authors
Carol C. Russell, Kathleen S. Smith, Virginia T. McLemore
Decision making, risk, and uncertainty
No abstract available.
Authors
Carol C. Russell, Kathleen S. Smith, Virginia T. McLemore
Sampling and monitoring program implementation
No abstract available.
Authors
Carol C. Russell, Virginia T. McLemore, Kathleen S. Smith
Mapping advanced argillic alteration at Cuprite, Nevada, using imaging spectroscopy
Mineral maps based on Airborne Visible/Infrared Imaging Spectrometer (AVIRIS) data were used to study late Miocene advanced argillic alteration at Cuprite, Nevada. Distributions of Fe-bearing minerals, clays, micas, sulfates, and carbonates were mapped using the Tetracorder spectral-shape matching system. The Al content of white micas increases toward altered areas and near intrusive rocks. Alunit
Authors
Gregg A. Swayze, Roger N. Clark, Alexander F.H. Goetz, K. Eric Livo, George N. Breit, Fred A. Kruse, Stephen J. Sutley, Lawrence W. Snee, Heather A. Lowers, James L. Post, Roger E. Stoffregen, Roger P. Ashley
Thermochronology of Cretaceous batholithic rocks in the northern Peninsular Ranges batholith, southern California: Implications for the Late Cretaceous tectonic evolution of southern California
The thermochronology for several suites of Mesozoic metamorphic and plutonic rocks collected throughout the northern Peninsular Ranges batholith (PRB) was studied as part of a collaborative isotopic study to further our understanding of the magmatic and tectonic history of southern California. These sample suites include: a traverse through the plutonic rocks across the northern PRB (N = 29), a tr
Authors
Daniel P. Miggins, Wayne R. Premo, Lawrence W Snee, Ross Yeoman, Nancy D. Naeaer, Charles W. Naeser, Douglas M. Morton