Chemical elements and element groups
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
Alphabetical Index of Topics
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