Publications
Publications from the staff of the Geology, Minerals, Energy, and Geophysics Science Center
Filter Total Items: 2543
Paleozoic tectonic and metallogenetic evolution of pericratonic terranes in Yukon, northern British Columbia and eastern Alaska Paleozoic tectonic and metallogenetic evolution of pericratonic terranes in Yukon, northern British Columbia and eastern Alaska
No abstract available.
Authors
JoAnne L. Nelson, Maurice Colpron, Stephen Piercey, Cynthia Dusel-Bacon, Donald Murphy, Charlie Roots
Paleozoic magmatism and crustal recycling along the ancient Pacific margin of North America, northern Cordillera Paleozoic magmatism and crustal recycling along the ancient Pacific margin of North America, northern Cordillera
No abstract available.
Authors
Stephen Piercey, JoAnne L. Nelson, Maurice Colpron, Cynthia Dusel-Bacon, Renee-Luce Simard, Charlie Roots
Lead isotopic constraints on the metallogeny of middle and late Paleozoic syngenetic base metal occurrences in the Yukon-Tanana and Slide Mountain/Seventymile Terranes and adjacent portions of the North American miogeocline Lead isotopic constraints on the metallogeny of middle and late Paleozoic syngenetic base metal occurrences in the Yukon-Tanana and Slide Mountain/Seventymile Terranes and adjacent portions of the North American miogeocline
No abstract available.
Authors
J.K. Mortensen, Cynthia Dusel-Bacon, J. Hunt, J. Gabites
Paleozoic tectonic and metallogenic evolution of the pericratonic rocks of east-central Alaska and adjacent Yukon Territory Paleozoic tectonic and metallogenic evolution of the pericratonic rocks of east-central Alaska and adjacent Yukon Territory
No abstract available.
Authors
JoAnne L. Nelson, Maurice Colpron, Stephen Piercey, Cynthia Dusel-Bacon, Donald Murphy, Charlie Roots
Characterization of unsaturated zone hydrogeologic units using matrix properties and depositional history in a complex volcanic environment Characterization of unsaturated zone hydrogeologic units using matrix properties and depositional history in a complex volcanic environment
Characterization of the physical and unsaturated hydrologic properties of subsurface materials is necessary to calculate flow and transport for land use practices and to evaluate subsurface processes such as perched water or lateral diversion of water, which are influenced by features such as faults, fractures, and abrupt changes in lithology. Input for numerical flow models typically...
Authors
Lorraine E. Flint, David C. Buesch, Alan L. Flint
Distribution, 14C chronology, and paleomagnetism of latest Pleistocene and Holocene lava flows at Haleakala volcano, Island of Maui, Hawai'i: A revision of lava flow hazard zones Distribution, 14C chronology, and paleomagnetism of latest Pleistocene and Holocene lava flows at Haleakala volcano, Island of Maui, Hawai'i: A revision of lava flow hazard zones
New mapping and 60 new radiocarbon ages define the age and distribution of latest Pleistocene and Holocene (past 13,000 years) lava flows at Haleakalā volcano, Island of Maui. Paleomagnetic directions were determined for 118 sites, of which 89 are in lava flows younger than 13,000 years. The paleomagnetic data, in conjunction with a reference paleosecular variation (PSV) curve for the...
Authors
David R. Sherrod, Jonathan T. Hagstrum, John P. McGeehin, Duane E. Champion, Frank A. Trusdell
Lithostratigraphy and shear-wave velocity in the crystallized Topopah Spring Tuff, Yucca Mountain, Nevada Lithostratigraphy and shear-wave velocity in the crystallized Topopah Spring Tuff, Yucca Mountain, Nevada
Evaluation of the potential future response to seismic events of the proposed spent nuclear fuel and high-level radioactive waste repository at Yucca Mountain, Nevada, is in part based on the seismic properties of the host rock, the 12.8-million-year-old Topopah Spring Tuff. Because of the processes that formed the tuff, the densely welded and crystallized part has three lithophysal and...
Authors
D.C. Buesch, K.H. Stokoe, K.C. Won, Y.J. Seong, J.L. Jung, M.D. Schuhen
Linking middle-school teachers to Earthscope Linking middle-school teachers to Earthscope
EarthScope is a multidisciplinary geophysical investigation of the structure and deformation of the North American continent. Components include a transportable array of digital seismometers (USArray) that will image the continental crust and underlying mantle, and Global Positioning System (GPS) receivers and strainmeters (Plate Boundary Observatory, PBO) that will measure tectonic and...
Authors
R. Butler, E. Bishop, C. Ault, B. Atwater, B. Magura, C. Hedeen, R. Blakely, Ray E. Wells, K. Shay, R. Wagner, T. Southworth-Neumeyer, D. Connor
Modeling spatial and temporal variations in temperature and salinity during stratification and overturn in Dexter Pit Lake, Tuscarora, Nevada, USA Modeling spatial and temporal variations in temperature and salinity during stratification and overturn in Dexter Pit Lake, Tuscarora, Nevada, USA
This paper examines the seasonal cycling of temperature and salinity in Dexter pit lake in arid northern Nevada, and describes an approach for modeling the physical processes that operate in such systems. The pit lake contains about 596,200 m3 of dilute, near neutral (pHs 6.7–9) water. Profiles of temperature, conductivity, and selected element concentrations were measured almost monthly...
Authors
Laurie S. Balistrieri, R.N. Tempel, L.L. Stillings, L.A. Shevenell
Reply to the discussion by F. Lagroix and S.K. Banerjee of "Geochemical evidence for the origin of late Quaternary loess in central Alaska" Reply to the discussion by F. Lagroix and S.K. Banerjee of "Geochemical evidence for the origin of late Quaternary loess in central Alaska"
No abstract available.
Authors
Daniel R. Muhs, James R. Budahn
Reducing risk in exploration under cover Reducing risk in exploration under cover
No abstract available.
Authors
Donald A. Singer, Ryoichi Kouda
The utility of gravity and magnetic methods for understanding subsurface hydrogeology in large alluvial watersheds: Examples from urbanized basins of the Western United States The utility of gravity and magnetic methods for understanding subsurface hydrogeology in large alluvial watersheds: Examples from urbanized basins of the Western United States
Population continues to grow rapidly within the large alluvial watersheds associated with structural basins of the Basin and Range Province and the Rio Grande rift of the western United States. Increasing demands on ground‐water resources in these basins, combined with water‐rights disputes, have amplified the need for improved understanding of subsurface hydrogeology. Gravity and...
Authors
V. J. S. Grauch, Victoria Langenheim