Publications
Listed below are publication products directly associated with the Geology, Energy & Minerals Science Center:
Filter Total Items: 1166
Repetitive sampling and control threshold improve 16S rRNA results from produced waters associated with hydraulically fractured shales
Sequencing microbial DNA from deep subsurface environments is complicated by a number of issues ranging from contamination to non-reproducible results. Many samples obtained from these environments - which are of great interest due to the potential to stimulate microbial methane generation - contain low biomass. Therefore, samples from these environments are difficult to study as sequencing result
Authors
Jenna L. Shelton, Elliott Barnhart, Leslie F. Ruppert, Aaron M. Jubb, Madalyn S. Blondes, Christina A. DeVera
Quantifying ecospace utilization and ecosystemengineering during the early Phanerozoic—The role of bioturbation and bioerosion
The Cambrian explosion (CE) and the great Ordovician biodiversification event (GOBE) are the two most important radiations in Paleozoic oceans. We quantify the role of bioturbation and bioerosion in ecospace utilization and ecosystem engineering using information from 1367 stratigraphic units. An increase in all diversity metrics is demonstrated for the Ediacaran-Cambrian transition, followed by a
Authors
Luis A. Buatois, M. Gabriela Mangano, Nicholas J Minter, Kai Zhou, Max Wisshak, Mark A. Wilson, Ricardo A. Olea
Metamorphic amphiboles in the Ironwood Iron-Formation, Gogebic Iron Range, Wisconsin: Implications for potential resource development
No abstract available.
Authors
Carlin J. Green, Robert R. Seal, Nadine M. Piatak, William F. Cannon, Ryan J. McAleer, Julia Nord
Mineral resource database for deposits related to the Mesoproterozoic Midcontinent Rift System, United States and Canada
The Midcontinent Rift System (MRS) of North America is one of the world’s largest continental rifts and has an age of 1.1 Ga (giga-annum). The MRS hosts a diverse suite of magmatic and hydrothermal mineral deposits in the Lake Superior region where rift rocks are exposed at or near the surface. As part of the construction of a database summarizing information on mineral deposits in the MRS, data f
Authors
Laurel G. Woodruff, Klaus J. Schulz, Connie L. Dicken, Suzanne W. Nicholson
Characterization of the unconventional Tuscaloosa marine shale reservoir in southwestern Mississippi, USA: Insights from optical and SEM petrography
This study presents new optical petrography and electron microscopy data, interpreted in the context of previously published petrophysical, geochemical, and mineralogical data, to further characterize the Tuscaloosa marine shale (TMS) as an unconventional reservoir in southwestern Mississippi. The basal high resistivity zone has a higher proportion of Type II sedimentary organic matter than the ov
Authors
Celeste D. Lohr, Brett J. Valentine, Paul C. Hackley, Frank T. Dulong
Evaluating the utility of principal component analysis on EDS x-ray maps to determine bulk mineralogy
Due to advances in EDS technology, electron microscopy techniques have become an important tool to determine the relative abundance of mineral phases. However, few studies have directly compared EDS X‐ray mineralogy with traditional techniques for assessing bulk mineralogy and elemental composition. We show that analysing a limited area (~ 0.5–3.2 mm2) of fine‐grained metal extraction samples usin
Authors
Karen Spaleta, Sarah M. Hayes, Rainer Newberry, Nadine M. Piatak
Origin and geochemistry of formation waters from the lower Eagle Ford Group, Gulf Coast Basin, south central Texas
The lower Eagle Ford Group (LEFG) is one of the most productive continuous hydrocarbon plays in the United States but few associated produced waters data and minimal interpretation have been published. This effort focuses on results from compositional and isotopic data from 39 produced water samples collected from horizontal wells producing from the LEFG in south central Texas. The depth of the LE
Authors
Mark A Engle, Colin A. Doolan, Janet K. Pitman, Matthew S. Varonka, Jessica Chenault, William H. Orem, Peter B. McMahon, Aaron M. Jubb
Conceptual framework and approach for conducting a geoenvironmental assessment of undiscovered uranium resources
This report presents a novel conceptual framework and approach for conducting a geologically based environmental assessment, or geoenvironmental assessment, of undiscovered uranium resources within an area likely to contain uranium deposits. The framework is based on a source-to-receptor model that prioritizes the most likely contaminant sources, contaminant pathways, and affected environmental me
Authors
Tanya J. Gallegos, Katherine Walton-Day, Robert R. Seal
Modeling geologic sequestration of carbon dioxide in a deep saline carbonate reservoir with TOUGH2–ChemPlugin, a new tool for reactive transport modeling
This paper outlines the development and demonstration of a new tool, TOUGH2–ChemPlugin (T2CPI) for predicting rock–water–CO2 interaction following injection of supercritical CO2 into a heterogeneous carbonate system. Specifically, modeling capabilities of TOUGH2, which examines multiphase flow and supercritical CO2 behavior, were combined with the geochemical modeling capabilities of The Geochemis
Authors
Tina L. Roberts-Ashby, Peter M. Berger, Jeffrey A. Cunningham, Ram Kumar, Madalyn S. Blondes
Nanoscale molecular composition of solid bitumen from the Eagle Ford Group across a natural thermal maturity gradient
Microscopic solid bitumen is a petrographically defined secondary organic matter residue produced during petroleum generation and subsequent oil transformation. The presence of solid bitumen impacts many reservoir properties including porosity, permeability, and hydrocarbon generation and storage, among others. Furthermore, solid bitumen reflectance is an important parameter for assessing the ther
Authors
Aaron M. Jubb, Justin E. Birdwell, Paul C. Hackley, Javin J. Hatcherian, Jing Qu
Detrital zircon age spectra of middle and upper Eocene outcrop belts, U.S. Gulf Coast region
Recently reported detrital zircon (DZ) data help to associate the Paleogene strata of the Gulf of Mexico region to various provenance areas. By far, recent work has emphasised upper Paleocene-lower Eocene and upper Oligocene strata that were deposited during the two episodes of the highest sediment supply in the Paleogene. The data reveal a dynamic drainage history, including (1) initial routing o
Authors
William H. Craddock, James L. Coleman Jr., Andrew R.C. Kylander-Clark
Compositional analysis of formation water geochemistry and microbiology of commercial and carbon dioxide-rich wells in the southwestern United States
Studies of naturally occurring subsurface carbon dioxide (CO2) accumulations can provide useful information for potential CO2 injection projects; however, the microbial communities and formation water geochemistry of most reservoirs are understudied. Formation water and microbial biomass were sampled at four CO2-rich reservoir sites: two within Bravo Dome, a commercial CO2 field in New Mexico; one
Authors
Jenna L. Shelton, Robert S. Andrews, Denise M. Akob, Christina A. DeVera, Adam C. Mumford, Mark Engle, Michelle R. Plampin, Sean T. Brennan