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Sunday, June 15, 2014

The use of solvent extractions and solubility theory to discern hydrocarbon associations in coal, with application to the coal–supercritical CO2 system

Outside Publication: Organic Geochemistry
Samples of three high volatile bituminous coals were subjected to parallel sets of extractions involving solvents dichloromethane (DCM), carbon disulfide (CS2), and supercritical carbon dioxide (CO2) (40 °C, 100 bar) to study processes affecting coal–solvent interactions. Recoveries of perdeuterated surrogate compounds, n-hexadecane-d34 and four polycyclic aromatic hydrocarbons (PAHs), added as a spike prior to extraction, provided further insight into these processes.


Wednesday, June 11, 2014

Geologic Framework for the National Assessment of Carbon Dioxide Storage Resources

Alaska North Slope and Kandik Basin, Alaska

USGS Publication: Open-File Report 2012–1024–I
Chapter I - This report presents fourteen storage assessment units (SAUs) from the Alaska North Slope and two SAUs from the Kandik Basin of Alaska. The Alaska North Slope is a broad, north-dipping coastal plain that is underlain by a thick succession of sedimentary rocks that accumulated steadily throughout much of the Phanerozoic during three major tectonic sequences: the Mississippian through Triassic Ellesmerian sequence, the Jurassic through Lower Cretaceous Beaufortian sequence, and the Cretaceous and Tertiary Brookian sequence.


Wednesday, June 04, 2014

Brine Contamination to Aquatic Resources from Oil and Gas Development in the Williston Basin, United States

USGS Publication: Scientific Investigations Report 2014-5017
The Williston Basin, which includes parts of Montana, North Dakota, and South Dakota in the United States and the provinces of Manitoba and Saskatchewan in Canada, has been a leading domestic oil and gas producing region for more than one-half a century. Currently, there are renewed efforts to develop oil and gas resources from deep geologic formations, spurred by advances in recovery technologies and economic incentives associated with the price of oil.


Monday, June 02, 2014

The Devonian Marcellus Shale and Millboro Shale

Outside Publication: GSA Field Guides 35, 2014
This field trip will examine a number of natural and engineered exposures in the vicinity of the West Virginia–Virginia state line, where participants will have the opportunity to view a variety of sedimentary facies within the Marcellus shale itself, sedimentary structures, tectonic structures, fossils, overlying and underlying formations, volcaniclastic ash beds, and to view a basaltic intrusion.


Sunday, June 01, 2014

Groundwater quality for historic in situ recovery (ISR) uranium mines in Texas

USGS Data Release
This data release summarizes geochemical groundwater data characterizing baseline water quality and changes during and after in situ recovery uranium mining for the Texas Coastal Plain.


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Page Last Modified: Wednesday, December 03, 2014