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Year Published: 2017

A cosmopolitan late Ediacaran biotic assemblage: new fossils from Nevada and Namibia support a global biostratigraphic link

Owing to the lack of temporally well-constrained Ediacaran fossil localities containing overlapping biotic assemblages, it has remained uncertain if the latest Ediacaran (ca 550–541 Ma) assemblages reflect systematic biological turnover or environmental, taphonomic or biogeographic biases. Here, we report new latest Ediacaran fossil...

Smith, E. F.; Nelson, L. L.; Tweedt, S. M.; Zeng, H.; Workman, Jeremiah B.
E. F. Smith, L. L. Nelson, S. M. Tweedt, H. Zeng, J. B. Workman (GECSC), 2017, A cosmopolitan late Ediacaran biotic assemblage: new fossils from Nevada and Namibia support a global biostratigraphic link: Proceedings of the Royal Society B, Biological Sciences, Vol. 284, issue 1858 DOI: 10.1098/rspb.2017.0934

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Year Published: 2017

Geomagnetically induced currents: Science, engineering, and applications readiness

This paper is the primary deliverable of the very first NASA Living With a Star Institute Working Group, Geomagnetically Induced Currents (GIC) Working Group. The paper provides a broad overview of the current status and future challenges pertaining to the science, engineering, and applications of the GIC problem. Science is understood here as the...

Pulkkinen, Antti; Bernabeu, E.; Thomson, A.; Viljanen, A.; Pirjola, R.; Boteler, D.; Eichner, J.; Cilliers, P.J.; Welling, D.; Savani, N.P.; Weigel, R.S.; Love, Jeffrey J.; Balch, Christopher; Ngwira, C.M.; Crowley, G.; Schultz, Adam; Kataoka, R.; Anderson, B.; Fugate, D.; Simpson, J.J.; MacAlester, M.
Pulkkinen, A., et al. (2017), Geomagnetically induced currents: Science, engineering, and applications readiness, Space Weather, 15, doi:10.1002/2016SW001501.

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Year Published: 2017

Inputs and internal cycling of nitrogen to a causeway influenced, hypersaline lake, Great Salt Lake, Utah, USA

Nitrogen inputs to Great Salt Lake (GSL), located in the western USA, were quantified relative to the resident nitrogen mass in order to better determine numeric nutrient criteria that may be considered at some point in the future. Total dissolved nitrogen inputs from four surface-water sources entering GSL were modeled during the 5-year study...

Naftz, David L.
Naftz, D.L., 2017, Inputs and internal cycling of nitrogen to a causeway influenced, hypersaline lake, Great Salt Lake, Utah, USA: Aquatic Geochemistry, vol. 23, no. 3, p. 199–216.

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Year Published: 2017

Numerical simulations of sand production in interbedded hydrate-bearing sediments during depressurization

Geomechanical behavior of hydrate-bearing sediments during gas production is complex, involving changes in hydrate-dependent mechanical properties. When interbedded clay layers are present, the complexity is more pronounced because hydrate dissociation tends to occur preferentially in the sediments adjacent to the clay layers due to clay layers...

Uchida, Shun; Lin, Jeen-Shang; Myshakin, Evgeniy; Seol, Yongkoo; Collett, Timothy S.; Boswell, Ray
Uchida, S., Lin, J.S., Myshakin, E.M., Seol, Y., Collett, T.S., and Boswell, R., 2017, Numerical simulations of sand production in interbedded hydrate-bearing sediments during depressurization: Proceeding of the 9th International Conference on Gas Hydrates; June 25-30, 2017; Denver, Colorado, USA, 10 p.

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Year Published: 2017

Numerical studies of depressurization-induced gas production from an interbedded marine turbidite gas hydrate reservoir model

The numerical simulation of thin hydrate-bearing sand layers interbedded with mud layers is investigated. In this model, the lowest hydrate layer occurs at the base of gas hydrate stability and overlies a thinly-interbedded saline aquifer. The predicted gas rates reach 6.25 MMscf/day (1.77 x 105 m3 /day) after 90 days of continuous...

Myshakin, Evgeniy; Lin, Jeen-Shang; Uchida, Shun; Seol, Yongkoo; Collett, Timothy S.; Boswell, Ray
Myshakin, E.M., Lin, J.S., Uchida, S., Seol, Y., Collett, T.S., and Boswell, R., 2017, Numerical studies of depressurization-induced gas production from an interbedded marine turbidite gas hydrate reservoir model: Proceeding of the 9th International Conference on Gas Hydrates; June 25-30, 2017; Denver, Colorado, USA, 18 p.

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Year Published: 2017

Real-time geomagnetic monitoring for space weather-related applications: Opportunities and challenges

An examination is made of opportunities and challenges for enhancing global, real-time geomagnetic monitoring that would be beneficial for a variety of operational projects. This enhancement in geomagnetic monitoring can be attained by expanding the geographic distribution of magnetometer stations, improving the quality of magnetometer data,...

Love, Jeffrey J.; Finn, Carol A.
Love, J. J., and C. A. Finn (2017), Real-time geomagnetic monitoring for space weather-related applications: Opportunities and challenges, Space Weather, 15, doi:/10.1002/2017SW001665.

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Year Published: 2017

Short-term ecological consequences of collaborative restoration treatments in ponderosa pine forests of Colorado

Ecological restoration treatments are being implemented at an increasing rate in ponderosa pine and other dry conifer forests across the western United States, via the USDA Forest Service’s Collaborative Forest Landscape Restoration (CFLR) program. In this program, collaborative stakeholder groups work with National Forests (NFs) to adaptively...

Briggs, Jenny S.; Fornwalt, Paula J.; Feinstein, Jonas A.
Briggs J.S., Fornwalt P.J., Feinstein J.A. Short-term ecological consequences of collaborative restoration treatments in ponderosa pine forests of Colorado Forest Ecology and Management 395:69-80 · July 2017

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Year Published: 2017

The increasingly complex challenge of gas hydrate reservoir simulation

No abstract available.

Boswell, Ray; Collett, Timothy S.; Myshakin, Evshakin; Ajayi, Taiwo; Seol, Yongkoo
Boswell, R., Collett, T.S., Myshakin, E., Ajayi, T., and Seol, Y., 2017, The increasingly complex challenge of gas hydrate reservoir simulation: Proceeding of the 9th International Conference on Gas Hydrates; June 25-30, 2017; Denver, Colorado, USA, 10 p.

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Year Published: 2017

Assessment of continuous oil and gas resources in the Pannonian Basin Province, Hungary, 2016

Using a geology-based assessment methodology, the U.S. Geological Survey estimated mean undiscovered, technically recoverable continuous resources of 119 million barrels of oil and 944 billion cubic feet of gas in the Hungarian part of the Pannonian Basin Province.

Schenk, Christopher J.; Klett, Timothy R.; Le, Phuong A.; Brownfield, Michael E.; Leathers-Miller, Heidi M.
Schenk, C.J., Klett, T.R., Le, P.A., Brownfield, M.E., and Leathers-Miller, H.M., 2017, Assessment of continuous oil and gas resources in the Pannonian Basin Province, Hungary, 2016: U.S. Geological Survey Fact Sheet 2017–3033, 2 p., https://doi.org/10.3133/fs20173033.

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Year Published: 2017

Rare earth mineral potential in the southeastern U.S. Coastal Plain from integrated geophysical, geochemical, and geological approaches

We combined geophysical, geochemical, mineralogical, and geological data to evaluate the regional presence of rare earth element (REE)−bearing minerals in heavy mineral sand deposits of the southeastern U.S. Coastal Plain. We also analyzed regional differences in these data to determine probable sedimentary provenance. Analyses of heavy mineral...

Shah, Anjana K.; Bern, Carleton R.; Van Gosen, Bradley S.; Daniels, David L.; Benzel, William M.; Budahn, James R.; Ellefsen, Karl J.; Karst, Adam; Davis, Richard
A.K. Shah1, C.R. Bern1, B.S. Van Gosen2, D.L. Daniels3, W.M. Benzel, J.R. Budahn, K.J. Ellefsen, A. Karst and R. Davis Rare earth mineral potential in the southeastern U.S. Coastal Plain from integrated geophysical, geochemical, and geological approaches Geological Society of America Bulletin, B31481.1, first published on May 11, 2017,

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Year Published: 2017

Probability calculations for three-part mineral resource assessments

Three-part mineral resource assessment is a methodology for predicting, in a specified geographic region, both the number of undiscovered mineral deposits and the amount of mineral resources in those deposits. These predictions are based on probability calculations that are performed with computer software that is newly implemented. Compared to...

Ellefsen, Karl J.
Ellefsen, K.J., 2017, Probability calculations for three-part mineral resource assessments: U.S. Geological Survey Techniques and Methods, book 7, chap. C15, 14 p., https://doi.org/10.3133/tm7C15.

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Year Published: 2017

User’s guide for MapMark4—An R package for the probability calculations in three-part mineral resource assessments

MapMark4 is a software package that implements the probability calculations in three-part mineral resource assessments. Functions within the software package are written in the R statistical programming language. These functions, their documentation, and a copy of this user’s guide are bundled together in R’s unit of shareable code, which is...

Ellefsen, Karl J.
Ellefsen, K.J., 2017, User’s guide for MapMark4—An R package for the probability calculations in three-part mineral resource assessments: U.S. Geological Survey Techniques and Methods, book 7, chap. C14, 23 p., https://doi.org/10.3133/tm7C14.

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