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Wednesday, March 01, 2017

Geochemistry and hydrology of perched groundwater springs: assessing elevated uranium concentrations at Pigeon Spring relative to nearby Pigeon Mine, Arizona (USA)

Outside Publication: Hydrogeology Journal
The processes that affect water chemistry as the water flows from recharge areas through breccia-pipe uranium deposits in the Grand Canyon region of the southwestern United States are not well understood. Pigeon Spring had elevated uranium in 1982 (44 μg/L), compared to other perched springs...

Thursday, January 19, 2017

The Iġnik Sikumi Field Experiment, Alaska North Slope: Design, operations, and implications for CO2−CH4 exchange in gas hydrate reservoirs

Outside Publication: Energy & Fuels
he Iġnik Sikumi Gas Hydrate Exchange Field Experiment was conducted by ConocoPhillips in partnership with the U.S. Department of Energy, the Japan Oil, Gas and Metals National Corporation, and the U.S. Geological Survey within the Prudhoe Bay Unit on the Alaska North Slope during 2011 and 2012...

Wednesday, January 18, 2017

Evaluation of gas production potential from gas hydrate deposits in National Petroleum Reserve Alaska using numerical simulations

Outside Publication: Journal of Natural Gas Science and Engineering
An evaluation of the gas production potential of Sunlight Peak gas hydrate accumulation in the eastern portion of the National Petroleum Reserve Alaska (NPRA) of Alaska North Slope (ANS) is conducted using numerical simulations, as part of the U.S. Geological Survey (USGS) gas hydrate Life Cycle Assessment program...

Sunday, January 01, 2017

Genetic and grade and tonnage models for sandstone-hosted roll-type uranium deposits, Texas Coastal Plain, USA

Outside Publication: Ore Geology Reviews
A genetic deposit model was developed for economic sandstone-hosted uranium deposits that formed in Eocene through Pliocene sandstones in the Texas Coastal Plain. Here 254 uranium occurrences, including 169 deposits, 73 prospects, 6 showings and 4 anomalies, have been identified. About 80 million pounds of U308 have been produced and about 60 million pounds of identified producible U308 remain in place.  Uranium is currently being produced from this region, and the deposit model may help identify new mineable deposits.  


Tuesday, October 04, 2016

USGS mineral-resource assessment of Sagebrush Focal Areas in the western United States

USGS Publication: Fact Sheet 2016-3074
U.S. Geological Survey (USGS) scientists have completed an assessment of the mineral-resource potential, including the uranium potential, of nearly 10 million acres of Federal and adjacent lands in Idaho, Montana, Nevada, Oregon, Utah, and Wyoming.  The assessment of these lands, identified as Sagebrush Focal Areas, was done at the request of the Bureau of Land Management. The assessment results will be used in the decision-making process that the Department of the Interior is pursuing toward the protection of large areas of contiguous sagebrush habitat for the greater sage-grouse (Centrocercus urophasianus) in the Western United States. The detailed results of this ambitious study are published in the five volumes of USGS Scientific Investigations Report 2016–5089 and seven accompanying data releases.

 


Tuesday, August 02, 2016

Use of mineral/solution equilibrium calculations to assess the potential for carnotite precipitation from groundwater in the Texas Panhandle, USA

Outside Publication: Applied Geochemistry
This study investigated the potential for the uranium mineral carnotite (K2(UO2)2(VO4)2x3H2O) to precipitate from evaporating groundwater in the Texas Panhandle region of the United States. Carnotite saturation did occur, and supports the potential for the formation of calcrete-type uranium deposits in the Texas panhandle.


Tuesday, July 19, 2016

Results of the India National Gas Hydrate Program Expedition 02

Field Report
The Government of India, with the support of the U.S. Geological Survey (USGS), has released the initial results of the most comprehensive gas hydrate scientific drilling investigation ever undertaken.  


Wednesday, April 13, 2016

Processing of multichannel seismic reflection data acquired in 2013 for seismic investigations of gas hydrates in the Gulf of Mexico

USGS Publication: Open-File Report 2016-1037
As part of a cooperative effort among the U.S. Geological Survey (USGS), the U.S. Department of Energy, and the U.S. Department of the Interior Bureau of Ocean Energy Management, two grids of two-dimensional multichannel seismic reflection data were acquired in the Gulf of Mexico over lease blocks Green Canyon 955 and Walker Ridge 313 between April 18 and May 3, 2013.


Thursday, March 03, 2016

USGS Assesses Baseline Conditions Prior to Uranium Mining near Grand Canyon National Park

USGS News
Scientists have collected and analyzed 84 environmental samples to establish baseline data prior to any active uranium mining activities at the Canyon Uranium Mine, located south of Grand Canyon National Park.  This baseline information will play an important role in assessing if contaminants escape from the mine site and how they would move through the environment once mining operations begin.


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