Geochemical and mineral maps from soils of the conterminous United States [ More info] Geochemical and mineralogical maps along with a histogram, boxplot, and empirical cumulative distribution function plot for each element or mineral whose data are provided in DS-801
Geochemical sediment analysis procedures [ More info] Manual of chemical sediment analysis using Coulometer and CHN Analyzers to measure carbon content, spectrometric analysis for biogenic silica, and radiochemistry to measure isotopes. Includes techniques,sample preparation, and safety procedures.
Platinum-group elements: so many excellent properties [ More info] These elements, abbreviated as PGE, include platinum, palladium, rhodium, ruthenium, iridium, and osmium. They have similar physical and chemical properties and occur together in nature.
Principal aquifers can contribute radium to sources of drinking water under certain geochemical conditions [ More info] Knowledge of the geochemical processes controlling radium occurrence in groundwater may help water-resource managers anticipate and minimize human exposure to this cancer-causing element.
Rare earth elements--End use and recyclability [ More info] Rare earth element use is changing with technology. This report explains how we use them and the prospects for recycling these important commodities.
The future of rare earth elements--will these high-tech industry elements continue in short supply? [ More info] Presentation describing uses of rare earth elements, why they are important, where they occur and are produced, and aspects of the economics of production and consumption with emphasis on sites that might be developed for production.
The principal rare earth elements deposits of the United States-A summary of domestic deposits and a global perspective [ More info] Explains the geologic setting in which these deposits are found, with information about production and the processes used to extract these valuable mineral resources.
The rare-earth elements: vital to modern technologies and lifestyles [ More info] Explains where and how deposits of these elements form, trends in supply and demand, how we use them, and how they may affect the environment.
Trace elements in coal ash [ More info] Describes and explains the material remaining when coal is burned, especially the trace elements present in it which may be concentrated by the burning process.
A methodology for conducting national-scale alluvial diamond resource potential and production capacity assessments, with a focus on artisanal mining [ More info] Geologic evidence, combined with geographical data and analyized through a geographic information system allows us to compare production statistics with likely resource estimates.
Antimony: a flame fighter [ More info] Explains how we use this element, where it is found, and describes the worldwide supply and demand for this commodity.
Application of the SPARROW watershed model to describe nutrient sources and transport in the Missouri River Basin [ More info] Maps and diagrams showing how the mathematical model predicts the distribution of various pollutants within a large watershed.
Arsenic in ground water of the United States [ More info] Arsenic is a naturally occurring element in rocks, soils, and the waters in contact with them. It is found in ground water as the result of minerals dissolving from weathered rocks and soils. This site links to data, maps, and more.
Assessing the vulnerability of public-supply wells to contamination: Rio Grande aquifer system in Albuquerque, New Mexico [ More info] Explains the natural and human-affected factors that determine the concentration of contaminants in groundwater, especially where the concentration is different at the surface than at depth, and where pumping varies with time.
Assessment of undiscovered sandstone-hosted uranium resources in the Texas Coastal Plain, 2015 [ More info] We estimated a mean of 220 million pounds of recoverable uranium oxide remaining as potential undiscovered resources in this area using a geology-based assessment method.
Beryllium--important for national defense [ More info] How this element is used, where we get it, and prospects for worldwide supply and demand.
Biochar for soil fertility and natural carbon sequestration [ More info] Explains what biochar is and how it is formed, its potential use in both fertilizer and carbon sequestration, and some of the research questions remaining to be addressed before we can utilize it fully in practical ways.
Breccia-pipe uranium mining in northern Arizona; estimate of resources and assessment of historical effects [ More info] Estimates of uranium resources affected by land withdrawal, effects of previous breccia-pipe mining, water-chemistry data for streams and springs, and potential biological pathways of exposure to uranium and associated contaminants.
Carbonatite and alkaline intrusion-related rare earth element deposits--A deposit model [ More info] Describes where and how mineral deposits of this type are found, including chemical and mineralogical characteristics, as well as unsolved scientific questions surrounding their origin.
Characterizing contaminant concentrations with depth by using the USGS well profiler in Oklahoma, 2003-9 [ More info] Use of specialized sampling equipment to study public water supply wells, with examples showing Arsenic in two aquifers.
China's rare-earth industry [ More info] Reviews production, consumption, and reserves and important policies and regulations regarding production and trade of rare earths, including recently announced export quotas.
Chloride control and monitoring program in the Wichita River Basin, Texas, 1996-2009 [ More info] Chloride concentrations in this river have historically been high due to natural saltwater springs and seeps from geologic formations. We monitor the water to help assess the progress of human efforts designed to mitigate this problematic salinity.
Chromium makes stainless steel stainless [ More info] Explains how we use chromium, the types of mineral deposits in which we find it, and the economic factors affecting supply and demand of this commodity.
Cobalt-For strength and color [ More info] Explains how we use cobalt, where it comes from, and whether we have enough available.
Conflict minerals from the Democratic Republic of the Congo--Gold supply chain [ More info] Describes the source and processing of this commodity, with special emphasis on countries where armed groups are involved in the supply chain.
Conflict minerals from the Democratic Republic of the Congo: global tantalum processing plants, a critical part of the tantalum supply chain [ More info] Describes how tantalum is produced for the global economic market, including a list of the processing plants generating industrial tantalum products.
Conflict minerals from the Democratic Republic of the Congo: global tungsten processing plants, a critical part of the tungsten supply chain [ More info] Information about tungsten processing plants to help identify risks associated with the supply of this strategic resource and support decision making related to mineral supply.
Conflict minerals from the Democratic Republic of the Congo: tin processing plants, a critical part of the tin supply chain [ More info] Describes the production and processing of tin with emphasis on the potential of the Democratic Republic of the Congo. Includes a list of tin refineries and smelters worldwide.
Copper - A Metal for the Ages [ More info] Sources, uses, and patterns of consumption of copper worldwide
Corals as climate recorders [ More info] Shows how coral reef specimens are collected, the type of information gained from them, and the methods by which they are measured and studied to understand recent (past few centuries) changes in climate.
Emissions from Coal Fires and Their Impact on the Environment [ More info] Reviews how coal fires occur, how they can be detected by airborne and remote surveys, and, most importantly, the impact coal-fire emissions may have on the environment and human health, especially mercury, carbon dioxide, carbon monoxide, and methane.
Environmental effects of historical mining in the Animas River watershed, southwestern Colorado [ More info] History and summary maps showing metal concentrations downstream of the mining area.
Environmental mercury mapping, modeling, and analysis [ More info] Online tools for mapping mercury data in the environment, with downloadable data from monitoring studies
Estimate of undiscovered copper resources of the world, 2013 [ More info] We estimated a mean of 3,500 million metric tons (Mt) of undiscovered copper among 225 tracts around the world using a geology-based assessment methodology.
Flow studies for recycling metal commodities in the United States [ More info] What happens to all the scrap metal? How well does recycling work? This guide explains what we know about the overall processes of recycling various metals.
Gallium--A smart metal [ More info] Usefulness and characteristics of this mineral commodity.
Geologic studies of mercury [ More info] Collection of six short papers related to the mercury geochemical society, the study of mercury in coal, concentrations in sediment, soil, water, and fish collected near mercury and gold mines, and volanic emissions of mercury.
Germanium: giving microelectronics an efficiency boost [ More info] Explains how we use the rare trace metal Germanium, where we find it, and outlines the supply and demand situation worldwide for this element.
Groundwater quality in Coachella Valley, California [ More info] Five trace elements with human-health concerns were detected at high concentrations: arsenic, boron, fluoride, molybdenum, and strontium. Vanadium was present at moderate concentrations.
Groundwater quality in the Antelope Valley, California [ More info] Trace elements were present at high concentrations in 32% of the primary aquifers here, and at moderate concentrations in 17%. Of particular interest are aluminum, arsenic, vanadium, boron, fluoride, chromium, lead, and molybdenum.
Groundwater quality in the Colorado River basins, California [ More info] Five trace elements with human-health concerns were detected at high concentrations: arsenic, boron, fluoride, molybdenum, and strontium. Chromium was detected at moderate concentrations.
Alphabetical Index of Topics
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