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Browse almost 5,000 conference papers authored by our scientists and refine search by topic, location, year, and advanced search.

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3-D Modeling of the Duluth Complex from geophysical data 3-D Modeling of the Duluth Complex from geophysical data

The Mesoproterozoic Duluth Complex in northeastern Minnesota is one of the major plutonic components of the Midcontinent Rift System and hosts a variety of copper-nickel sulfide and platinum-group element deposits. The Duluth Complex is composed of a series of individual mafic and felsic intrusions emplaced 1110-1098 Ma within Paleoproterozoic sedimentary rocks of the Animikie basin and...
Authors
Dana E. Peterson, Paul A. Bedrosian, Carol A. Finn
By
Mineral Resources Program, Geology, Geophysics, and Geochemistry Science Center

Integration of geophysical evidence suggests that anorthosite composes a significant portion of Grand Marais ridge, an inferred basement high in western Lake Superior Integration of geophysical evidence suggests that anorthosite composes a significant portion of Grand Marais ridge, an inferred basement high in western Lake Superior

The Midcontinent Rift System (MRS) is expressed geophysically by a semi-linear, regional gravity high that trends across the Midcontinent and Great Lakes region of North America. The gravity high is interrupted by two prominent, semi-circular gravity lows, which have been interpreted from modeling and seismic-reflection sections as basement highs of Archean granite (Allen et al., 1997)...
Authors
V. J. Grauch, Samuel J. Heller
By
Ecosystems Mission Area, Northern Rocky Mountain Science Center, Geology, Geophysics, and Geochemistry Science Center

Asteroid impacts - downwind and downstream effects Asteroid impacts - downwind and downstream effects

For this abstract, we have selected an impact location, consistent with the PDC2021 initial scenario [1], in the San Juan Mountains, in southwestern Colorado. This is a low-density population area but is part of the watershed system within the Colorado River basin, a major source for water and power for the southwestern United States. Several large cities and major airports are...
Authors
Timothy N. Titus, D. G. Robertson, Joel B. Sankey, Larry G. Mastin
By
Natural Hazards Mission Area, Astrogeology Science Center

Delineation of the freshwater-saltwater interface on southwestern Long Island, New York, through use of surface and borehole geophysical methods Delineation of the freshwater-saltwater interface on southwestern Long Island, New York, through use of surface and borehole geophysical methods

The U.S. Geological Survey used surface and borehole geophysical methods to delineate the freshwater-saltwater interface in coastal plain aquifers along the southwestern part of Long Island, New York. Over pumping of groundwater in the early 20th century combined with freshwater-saltwater interfaces at the coastline created saltwater intrusion in the upper glacial, Jameco, Magothy, and...
Authors
Frederick Stumm, Michael D. Como, Marie A. Zuck
By
Water Resources Mission Area, New York Water Science Center

Graph-based reinforcement learning for active learning in real time: An application in modeling river networks Graph-based reinforcement learning for active learning in real time: An application in modeling river networks

Effective training of advanced ML models requires large amounts of labeled data, which is often scarce in scientific problems given the substantial human labor and material cost to collect labeled data. This poses a challenge on determining when and where we should deploy measuring instruments (e.g., in-situ sensors) to collect labeled data efficiently. This problem differs from...
Authors
Xiaowei Jia, Beiyu Lin, Jacob Aaron Zwart, Jeffrey Michael Sadler, Alison P. Appling, Samantha K. Oliver, Jordan Read
By
Water Resources Mission Area

Linear deconvolution applied to ASTER imagery of terrestrial dune analog sites Linear deconvolution applied to ASTER imagery of terrestrial dune analog sites

Advanced Spaceborne Thermal Emission and Reflec-tion (ASTER) radiometer onboard NASA’s Terra satellite has nearly complete global coverage in the 8 – 14 µm thermal infrared (TIR) atmospheric window and is the highest resolution sensor providing TIR emissivity data at 90-m spatial resolution and five multispectral bands. ASTER imagery enables mapping of spatial variations in the...
Authors
Donald M. Hooper, Bernard E. Hubbard
By
Mineral Resources Program, Geology, Energy & Minerals Science Center
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