U.S Geological Survey Energy Resources Program Geochemistry Laboratory Database (EGDB). The EGDB contains chemical analysis data for crude oil, natural gas, coal, water, and rock samples analyzed by the USGS Energy Resources Science Center’s Geochemistry Laboratory, or by contracted-service laboratories. Data was also obtained from the literature and unpublished public domain sources. The sample types included are primarily rock, coal, oil, and gas. This information is used by the USGS for worldwide energy resource assessments and is periodically released to the public. Analytical data within the EGDB includes rock-eval pyrolysis, organic mass spectrometry, vitrinite reflectance, gas chromatography, stable carbon isotopes, inductively coupled plasma, inductively coupled plasma mass spectrometry, mercury analysis and a number of other related geochemistry analyses that, in some instances, predate the EGDB.

contact: energylabs@usgs.gov