Formation of the Mount Weld rare earth deposit, Western Australia: Geochronology constraints
Philip Verplanck, Cameron Mark Mercer, Jay Michael Thompson, Martin Danišík, Ganesh Bhat, Heather A. Lowers
2025, Conference Paper
Constraining the age of protracted chemical weathering in stable cratonic areas that may form thick regoliths and the potential enrichment of various elements is challenging. Economic deposits of aluminium, iron, copper, nickel, cobalt, niobium, and rare earth elements (REEs) form in this manner. Determining the age of formation can provide...
Mine waste as a potential source of critical minerals and other commodities: Examples from the Four Corners states, USA
Jeffrey L. Mauk, Sean Patrick Gaynor, Nick Karl, Andrew Francis Smith
2025, Conference Paper
The growing demand for critical minerals and other mineral resources has raised concerns about possible supplies of these essential commodities. Mine waste is a potential source of these essential commodities. We compiled a geospatial database of publicly available data of the largest non-fuel mine waste features (>200,000 m2 in areal...
Petrogenesis and mineralization potential of the Bradley Peak komatiitic basalts, Wyoming Province
Lisa Joanne Zieman, Michael Jenkins, Michael L. Zientek, Jacob Evan Poletti, Alan D. Rooney
2025, Conference Paper
The ca. 2.72 Ga Bradley Peak greenstone terrane in the Wyoming Province contains spinifex- and cumulate-textured komatiitic volcanic rocks that may host Ni-Cu-PGE sulfide mineralization. New whole rock geochemistry classifies these rocks as Al-undepleted komatiitic basalts derived from a parental melt with ~17 wt. % MgO. Isotopic data (Sm-Nd, Re-Os)...
Mechanics and statistics of postseismic shaking
Timothy Hugh Clements, Elizabeth S. Cochran, Sarah E. Minson, Nicholas van der Elst, Clara Yoon, Annemarie S. Baltay Sundstrom, Morgan T. Page
2025, Geophysical Research Letters (52)
Analysis of two weeks of continuous post-seismic shaking after the 2019 M7.1 Ridgecrest, CA earthquake sequence using 4 nearby borehole seismometers reveals that continuous ground motions decay as Omori’s law in time and follow the Gutenberg-Richter distribution in logarithmic amplitude. The measured temporal decay in amplitudes agrees with predictions of...
Airborne radiometric data map alteration of porphyry copper systems in the Elkhorn district, MT
Eric Anderson, Kaleb Scarberry, Kyle Eastman, Jonathan Andrew Funk, Benjamin Patrick Magnin, Joseph Clevenger, John Dilles, Jarred L. Zimmerman, Snir Attia, Michael Cosca
2025, Conference Paper
The Elkhorn district in southwestern Montana is known for past production of high-grade base and precious metals from skarn and carbonate replacement deposits. The district also hosts a porphyry Cu-Mo deposit. A radiometric survey flown over the district and surrounds provides maps of surficial concentrations of potassium, thorium, and uranium....
Tracing fluid evolution during batholith and deposit formation: In-situ and bulk rock Mo isotopes from the Questa porphyry Mo deposit, New Mexico, USA
Sean Patrick Gaynor, Nicolas D. Greber, Qasid Ahmad, Pia Künzi, Ingo Horn, Stefan Weyer
2025, Conference Paper
The Oligocene Questa porphyry Mo deposit, located in New Mexico, USA, is a well-characterized system that formed over 400 kyr, punctuating the 8 Myr formation of the Questa-Latir batholith. Detailed sampling of the intrusions and minerals associated with magmatichydrothermal mineralization, as well as bookending barren intrusions, allows for examination of...
Did they feel it? Legacy maroseismic data illuminates an engimatic 20th century earthquake
Susan E. Hough, Lori Dengler, Robert McPherson, Lijam Hagos, Margaret Hellweg
2025, Earth and Space Science (12)
The challenges and the importance of preserving legacy instrumental records of earthquakes are now well-recognized (e.g., Richards & Hellweg, 2020, https://doi.org/10.1785/0220200053). Seismologists may not be aware of parallel challenges and opportunities with legacy macroseismic data for earthquakes in the United States. For much of the 20th century, macroseismic...
Shear surface undulations modulate clayey gouge strength and contribute to divergent landslide acceleration
William H. Schulz, Gonghui Wang, Yao Jiang, Brian D. Collins, Mark E. Reid, Mason Muir Einbund
2025, Engineering Geology (357)
Landslides display a spectrum of speeds for incompletely known reasons. Sliding occurs along slickensided undulatory shear surfaces within boundary shear gouge. Laboratory tests reveal that gouge shear strength generally decreases with finite cumulative displacement during relatively rapid failure and may...
A comparison of deep-sea coral and sponge species distribution models and the impact of ocean currents in the Southern California Bight
Nissa Kreidler, Andre Buchheister, David D. Huff, Jerome Fiechter, Mary Yoklavich, Mark J. Henderson
2025, Deep Sea Research Part II: Topical Studies in Oceanography (224)
Deep-sea corals and sponges (DSCS) are signature taxa of deep-water habitats, but ecological mechanisms that drive their geographic distributions can be difficult to uncover due to the challenges of surveying deep-water ecosystems and limited oceanographic data. A comparison of species distribution models was made for three DSCS...
Sounds of Atlantic sturgeon spawning: First description and opportunities for riverine endangered species conservation with passive acoustic monitoring
Rebecca Cohen, Patrick J. Baker, Christopher Bowser, Matthew W. Breece, Alexander Flecker, Dewayne Fox, James Henne, Amanda Higgs, Maija Niemistö, Richard Pendleton, Suresh A Sethi, Shannon L. White, Aaron Rice
2025, Endangered Species Research (58)
Effective recovery plans for endangered species rely on insights into species’ ecology to identify risks and develop population recovery strategies. Data gaps pose challenges for many species of conservation concern, particularly those with cryptic behaviors or that occupy difficult-to-access habitats. Sounds produced by these species offer an effective means of...
Distribution, abundance, and habitat characteristics of Coastal Cactus Wrens (Campylorhynchus brunneicapillus) in San Diego County, California—2024 data summary
Suellen Lynn, Barbara E. Kus
2025, Data Report 1216
Executive SummaryWe surveyed for coastal Cactus Wren (Campylorhynchus brunneicapillus) in 507 established plots in San Diego County in 2024, encompassing four genetic clusters (Otay, Lake Jennings, Sweetwater/Encanto, and San Pasqual). Of the 507 plots, 376 have been surveyed every year starting in 2020. Two surveys were completed at each plot...
Factors influencing spatial and temporal patterns of Lanius ludovicianus (Loggerhead Shrike) occupancy at a grassland-sagebrush ecotone
Holly M. Todaro, Scott R. Loss, Robert Charles Lonsinger, Courtney J. Duchardt
2025, Ornithological Applications
Lanius ludovicianus (Loggerhead Shrike) is a predatory songbird that has experienced a severe population decline throughout its range since the 1940s, likely driven by a combination of factors, including habitat loss and fragmentation. Occupying larger territories compared to many other passerines, L. ludovicianus requires open habitat with interspersed trees and shrubs for nesting...
Understanding market sensitivity: Estimation of supply and demand elasticities for non-fuel minerals
Ensieh Shojaeddini, Elisa Alonso, Nedal T. Nassar, David Pineault, Sydney M. Allen, Jamie L. Brainard, Dalton M. McCaffrey, Timothy M. O'Brien, Abraham J. Padilla, John W. Ryter
2025, Mineral Economics (38) 985-996
In today’s rapidly changing economic landscape, understanding market responsiveness to price changes and the factors influencing commodity prices has become increasingly relevant. Price elasticities serve as indicators of how variations in market conditions affect supply and demand, providing insights into the sensitivity of commodity markets to price fluctuations. This paper...
Predicting aquatic habitat connectivity across watershed boundaries: Implications for interbasin spread of nonindigenous aquatic species.
Peter J. Pfaff, Alison A. Coulter, Benjamin J. Schall, Tanner Davis, Steven R. Chipps, David P. Coulter
2025, Frontiers in Environmental Science (113)
Understanding habitat connectivity is critical for managing nonindigenous aquatic species (NAS) spread. Dams and watershed boundaries can be impassable to NAS during typical conditions but may become temporarily passable during flooding. The goal of our project was to develop an approach for identifying locations of aquatic connectivity...
Factors structuring macrofaunal communities of hydrocarbon seeps along the Cascadia margin
Penny Jo Mccowen, Jill R. Bourque, Donald C. Behringer, Nancy G. Prouty, Amanda W.J. Demopoulos
2025, Deep Sea Research Part I: Oceanographic Research Papers (225)
Cold seeps, fueled by hydrocarbon-based chemosynthesis, support unique benthic communities that can vary across small spatial scales influenced by local geochemistry. We examined the community structure and function of macrofauna in cold seeps along the Cascadia margin on the edge of gas hydrate stability—a dynamic environment that may fluctuate as...
Yellowstone River Compact Commission seventy-third annual report 2024
Aaron A. Fiaschetti
2025, Report
No abstract available....
Assessment of undiscovered conventional oil and gas resources of India and Sri Lanka, 2024
Christopher J. Schenk, Tracey J. Mercier, Phuong A. Le, Andrea D. Cicero, Ronald M. Drake II, Sarah E. Gelman, Jane S. Hearon, Benjamin G. Johnson, Jenny H. Lagesse, Heidi M. Leathers-Miller, Kira K. Timm
2025, Fact Sheet 2025-3043
Using a geology-based assessment methodology, the U.S. Geological Survey estimated undiscovered, technically recoverable mean conventional resources of 1.0 billion barrels of oil and 53.4 trillion cubic feet of gas in India and Sri Lanka....
An exploration of the relative influence of physical models for Omori’s law
Thomas E. Parsons, Eric L. Geist, L. Malagnini
2025, Frontiers in Earth Science (13)
Omori’s law states that the rate of aftershocks decays as a function of inverse time. There are multiple physical explanations that we reduce into a nonlinear mixed effects relation of three terms: (1) a Rate/State expression that can account for static/dynamic and viscoelastic triggering caused directly by the mainshock, (2)...
Detection and genetic characterization of red-spotted grouper nervous necrosis virus and a novel genotype of nervous necrosis virus in black sea bass from the U.S. Atlantic coast
Jan Lovy, Miriam Abbadi, Anna Toffan, Nilanjana Das, James Neugebauer, William Batts, Peter Clarke
2025, Viruses (17)
Nervous necrosis virus (NNV) causes a neurologic disease in a wide range of marine fish and poses serious disease risks to marine aquaculture worldwide. Little is known about the presence of NNV along the Atlantic coast of the United States, aside from the presence of barfin flounder nervous necrosis virus...
Revisiting discoveries of the inner core
Adam T. Ringler, Pritwiraj Moulik, Thomas A. Lee, David C. Wilson, Robert E. Anthony
2025, Seismological Research Letters
Seismology has been used as a tool for understanding the current physical properties of the interior of the Earth and its dynamic evolution with remarkable success over the...
Causal interpretations can be based on mechanistic knowledge
James Grace, Glenn Guntenspergen, Kevin Buffington, Justine Annaliese Neville, Karen M. Thorne, Michael J. Osland, Melinda Martinez, Joel Carr, Debra A. Willard
2025, Journal of Ecology (113) 3084-3098
There exists a long-standing disconnect between statistical and mechanistic approaches to the development of causal understanding. Statistical approaches, which have dominated the literature, have focused on the need to obtain perfectly unbiased estimates of causal effects often using either experimental, quasi-experimental or other methods. Mechanistic approaches have instead focused...
Ultraviolet and visible remote sensing of volcanic gases
Christoph Kern
2025, Journal of Volcanology and Geothermal Research (468)
As magma rises in volcanic systems, volatile species exsolve from the silicate melt and are emitted as gases into the atmosphere. Measuring the magnitude and composition of gas emissions from volcanoes provides insights into processes occurring deep within the Earth...
Movements and habitat use vary across the Rocky Mountain Population of trumpeter swans
Sharon A. Poessel, Todd Sanders, William Long, Andrea Kristof, Brandon Reishus, Matt Proett, Claire Gower, Nicole Ibrahim, Todd E. Katzner
2025, Journal of Wildlife Management (89)
The Rocky Mountain Population (RMP) of trumpeter swans Cygnus buccinator (hereafter, swans) in North America includes breeders in the Greater Yellowstone Area (GYA) and other western states (together, United States segment) and western provinces of Canada (Canada segment). Conservation concern for the United States segment stems from its slow population growth and...
Assessing survey design for long-term population trend detection in piping plovers
Eve Bohnett, Jessica Schulz, Robert C. Dobbs, Thomas Hoctor, Bilal Ahmad, Wajid Rashid, J. Hardin Waddle
2025, Land (14)
Determining appropriate spatio-temporal scales for monitoring migratory shorebirds is challenging. Effective surveys must detect population trends without excessive or insufficient sampling, yet many programs lack formal evaluations of survey effectiveness. Using data from 2012 to 2019 on Louisiana’s barrier islands (Whiskey, west Raccoon, east Raccoon, and Trinity), we assessed how...
Multi-stage crustal thickening, surface uplift, and collision in the western Himalaya-Karakoram-Tibet orogen revealed by chemical mohometry
Ian William Hillenbrand, Victor E. Guevara
2025, Geophysical Research Letters (26)
The Himalaya-Karakoram-Tibet (HKT) orogen provides an unrivaled opportunity to study the dynamic linkages between deep and surface processes during collisional orogenesis. However, these efforts are hindered by conflicting interpretations on the number and timing of collisional events, and the timing of crustal thickening and associated surface uplift. Here, we resolve...
