USGS: Science Topics: geochemistry

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Geochemistry

Study of the distribution of chemical elements and natural compounds on the earth and in the atmosphere and the chemical processes that affect the earth.

Subtopics:
Soil chemistry (4 items)
Water chemistry (120 items)

Geochemical anomaly maps (9 items)

Related topics:

Results 121 - 130 of 175 listed by similarity [list alphabetically]

Photographs of the Picher Mining District (Ottawa County, Oklahoma) [More info]: Description and photos related to the Picher Mining District in Oklahoma, once a primary U.S. source of lead and zinc and now the largest superfund site in the U.S. with millions of cubic yards of mine tailings (locally known as "chat") remaining.
Primer on water quality [More info]: Fact sheet on what "water quality" means, how it is determined, and the natural processes and human activities that affect it.
Produced waters database [More info]: Database provides information on petroleum reservoirs, type and abundance of constituents dissolved in produced water, geochemical reactions between the water and rock, hydrology and geologic, spatial distribution of petroleum production areas.
Real-time water-quality monitoring and regression analysis to estimate nutrient and bacteria concentration in Kansas streams. [More info]: Report on the use of regression equations from measurements made by water quality monitors and analytical results of manually collected samples estimating nutrient, bacteria, and other constituent concentrations to study streams in Kansas.
Redox Conditions in Selected Principal Aquifers of the United States [More info]: Summarizes measurements of ground-water chemistry that affect the vulnerability of aquifers to contamination. Data are from aquifers throughout the conterminous US and Alaska.
Response of Florida shelf ecosystems to climate change: from macro to micro scales [More info]: Study of the effects of ocean acidification on regional carbonate processes, changes in individual estuaries, and organism-level response.
Reston Chlorofluorocarbon Laboratory [More info]: Site on the Chlorofluorocarbon Laboratory and its analytical services for CFCs, sulfur hexafluoride, dissolved gases including nitrogen, argon, methane, carbon dioxide, oxygen, and helium, and tritium/helium-3 dating.
Reston Stable Isotope Laboratory [More info]: The Reston Stable Isotope Laboratory conducts research on the use of isotope ratio measurements in studies of water resources and environmental quality.
Science to support the understanding of south Texas surface-water and groundwater resources in a changing landscape [More info]: Short descriptions of the research and monitoring activities we are carrying out to assist state, local, and Federal agencies dealing with water resource issues in the southern part of the state.
Science-Based Strategies for Sustaining Coral Ecosystems [More info]: Explains the environmental factors that affect coral reef habitats and ecosystems, focusing on those that pose urgent problems.

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