Publications
Listed below are publication products directly associated with the Geology, Energy & Minerals Science Center:
Filter Total Items: 1241
Porosity of the Marcellus Shale: A contrast matching small-angle neutron scattering study Porosity of the Marcellus Shale: A contrast matching small-angle neutron scattering study
Neutron scattering techniques were used to determine the effect of mineral matter on the accessibility of water and toluene to pores in the Devonian Marcellus Shale. Three Marcellus Shale samples, representing quartz-rich, clay-rich, and carbonate-rich facies, were examined using contrast matching small-angle neutron scattering (CM-SANS) at ambient pressure and temperature. Contrast...
Authors
Jitendra Bahadur, Leslie F. Ruppert, Vitaliy Pipich, Richard Sakurovs, Yuri B. Melnichenko
Nanometre-sized pores in coal: Variations between coal basins and coal origin Nanometre-sized pores in coal: Variations between coal basins and coal origin
We have used small angle neutron scattering (SANS) to investigate the differences in methane and hexane penetration in pores in bituminous coal samples from the U.S., Canada, South Africa, and China, and maceral concentrates from Australian coals. This work is an extension of previous work that showed consistent differences between the extent of penetration by methane into 10–20 nm size...
Authors
Richard Sakurovs, Lukas Koval, Mihaela Grigore, Anna Sokolava, Leslie F. Ruppert, Yuri B. Melnichenko
Determining mineralogical variations of aeolian deposits using thermal infrared emissivity and linear deconvolution methods Determining mineralogical variations of aeolian deposits using thermal infrared emissivity and linear deconvolution methods
We apply linear deconvolution methods to derive mineral and glass proportions for eight field sample training sites at seven dune fields: (1) Algodones, California; (2) Big Dune, Nevada; (3) Bruneau, Idaho; (4) Great Kobuk Sand Dunes, Alaska; (5) Great Sand Dunes National Park and Preserve, Colorado; (6) Sunset Crater, Arizona; and (7) White Sands National Monument, New Mexico. These...
Authors
Bernard E. Hubbard, Donald M. Hooper, Federico Solano, John C. Mars
Advancements in hydrochemistry mapping: methods and application to groundwater arsenic and iron concentrations in Varanasi, Uttar Pradesh, India Advancements in hydrochemistry mapping: methods and application to groundwater arsenic and iron concentrations in Varanasi, Uttar Pradesh, India
The area east of Varanasi is one of numerous places along the watershed of the Ganges River with groundwater concentrations of arsenic surpassing the maximum value of 10 parts per billion (ppb) recommended by the World Health Organization in drinking water. Here we apply geostatistics and compositional data analysis for the mapping of arsenic and iron to help in understanding the...
Authors
Ricardo A. Olea, N. Janardhana Raju, Juan J. Egozcue, Vera Pawlowsky-Glahn, Shubhra Singh
Hydraulic fracturing (fracking) Hydraulic fracturing (fracking)
No abstract available.
Authors
Tanya J. Gallegos
Correlation of the Tuscaloosa marine shale in Mississippi, Louisiana, and east Texas, U.S.A. Correlation of the Tuscaloosa marine shale in Mississippi, Louisiana, and east Texas, U.S.A.
The U.S. Geological Survey (USGS) completed an assessment of undiscovered, technically recoverable unconventional petroleum resources in the Upper Cretaceous marine shale of the Tuscaloosa Group (Tuscaloosa marine shale; TMS) in 2018. As part of the geologic characterization in preparation for the assessment, a series of wireline log cross sections were constructed to illustrate TMS...
Authors
William A. Rouse, Catherine B. Enomoto, Nicholas J. Gianoutsos
Quality of water from crystalline rock aquifers in New England, New Jersey, and New York, 1995-2007 Quality of water from crystalline rock aquifers in New England, New Jersey, and New York, 1995-2007
Crystalline bedrock aquifers in New England and parts of New Jersey and New York (NECR aquifers) are a major source of drinking water. Because the quality of water in these aquifers is highly variable, the U.S. Geological Survey (USGS) statistically analyzed chemical data on samples of untreated groundwater collected from 117 domestic bedrock wells in New England, New York, and New...
Authors
Sarah M. Flanagan, Joseph D. Ayotte, Gilpin R. Robinson
A practical primer on geostatistics A practical primer on geostatistics
Introduction The Challenge—Most geological phenomena are extraordinarily complex in their interrelationships and vast in their geographical extension. Ordinarily, engineers and geoscientists are faced with corporate or scientific requirements to properly prepare geological models with measurements involving a small fraction of the entire area or volume of interest. Exact description of a...
Authors
Ricardo A. Olea
Application of organic petrology in high maturity shale gas systems Application of organic petrology in high maturity shale gas systems
Application of incident light microscopy techniques for organic petrology in high temperature thermogenic shale gas systems demonstrates that solid bitumen is the dominant organic matter. Solid bitumen is retained as a residual conversion product as oil-prone kerogen cracks to hydrocarbons or occurs from the cracking of once liquid oil. Oil-prone Type I/II kerogens are not present in...
Authors
Paul C. Hackley
Analysis of artificially matured shales with confocal laser scanning raman microscopy: Applications to organic matter characterization Analysis of artificially matured shales with confocal laser scanning raman microscopy: Applications to organic matter characterization
Raman spectroscopy has been suggested as a method for characterizing the thermal maturity of rocks. The literature contains many empirical correlations between thermal maturity proxies, such as vitrinite reflectance (VRo) and pyrolysis-Tmax, with spectral metrics such as Raman peak-widths, peak-center positions, peak-areas and all manner of differences and ratios of these parameters...
Authors
Grant A. Myers, Kelsey Kehoe, Paul C. Hackley
Assessment of undiscovered oil and gas resources in the Cretaceous Nanushuk and Torok Formations, Alaska North Slope, and summary of resource potential of the National Petroleum Reserve in Alaska, 2017 Assessment of undiscovered oil and gas resources in the Cretaceous Nanushuk and Torok Formations, Alaska North Slope, and summary of resource potential of the National Petroleum Reserve in Alaska, 2017
The U.S. Geological Survey estimated mean undiscovered, technically recoverable resources of 8.7 billion barrels of oil and 25 trillion cubic feet of natural gas (associated and nonassociated) in conventional accumulations in the Cretaceous Nanushuk and Torok Formations in the National Petroleum Reserve in Alaska, adjacent State and Native lands, and State waters. The estimated...
Authors
David W. Houseknecht, Richard O. Lease, Christopher J. Schenk, Tracey J. Mercier, William A. Rouse, Palma J. Botterell, Katherine J. Whidden, Christopher P. Garrity, Kristen A. Lewis, Samuel J. Heller, William H. Craddock, Timothy R. Klett, Phuong A. Le, Rebecca A. Smith, Marilyn E. Tennyson, Stephanie B. Gaswirth, Cheryl A. Woodall, Michael E. Brownfield, Heidi M. Leathers-Miller, Thomas M. Finn
Selenium Selenium
Selenium (Se) was discovered in 1817 in pyrite from copper mines in Sweden. It is a trace element in Earth’s crust, with an abundance of three to seven orders of magnitude less than the major rock-forming elements. Commercial use of selenium began in the United States in 1910, when it was used as a pigment for paints, ceramic glazes, and red glass. Since that time, it has had many other...
Authors
Lisa L. Stillings