USGS: Science Topics: carbon isotope analysis

Science Topics

Carbon isotope analysis

Experimental determination of the proportion of a given stable carbon isotope (C12 or C13) in a sample.

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Results 1 - 5 of 5 listed by similarity [list alphabetically]

Selenium and stable isotopes of carbon and nitrogen in the benthic clam Corbula amurensis from Northern San Francisco Bay, California: May 1995-February 2010 [More info]: Monthly selenium concentration in this keystone species shows strong spatial and seasonal variation in a five-year series of analyses.
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.
Isotope and Chemical Methods in Support of the U.S. Geological Survey Science Strategy, 2003-2008 [More info]: Types of geochemical and isotopic analyses used in conducting a variety of research studies in USGS, primarily focused on mineral deposit formation.
Devils Hole, Nevada--A Primer [More info]: Explains the important paleoclimatic information we have obtained from this subaqueous cavern. The time-series data show important contrasts with what would be predicted from orbital theory, provoking extensive scientific discussion.
How do geologists date rocks? Radiometric dating! [More info]: Explanation of how geologists date rocks (to determine the ages of the Earth, fossils, mineral deposits, and other geologic events) and processes using radiometric dating techniques based on radioactive isotopes of carbon and potassium/argon.

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