The Lepanto Cu–Au deposit, Philippines: A fossil hyperacidic volcanic lake complex
Byron R. Berger, Richard W. Henley, Heather A. Lowers, Michael Pribil
2014, Journal of Volcanology and Geothermal Research (271) 70-82
Hyperacidic lakes and associated solfatara in active volcanoes are the expression of magmatic gas expansion from source to surface. Here we show for the first time, that the vein system that comprises the ~ 2 Ma high-sulfidation, Lepanto copper–gold deposit in the Mankayan district (Philippines) was associated with a contemporary hyperacidic volcanic...
Comparison of fishes in nearshore areas of the St. Lawrence River, New York over 35 years
Douglas M. Carlson, James E. McKenna Jr.
2014, NYSDEC Lake Ontario Annual Report 2013-21
Fishes of the nearshore waters of the St. Lawrence River provide forage for valuable sport fisheries and are important biological indicators of condition and change. This fish community differs slightly among various reaches of the St. Lawrence River from New York to Quebec (Carlson et al. 2006, Eckert and Hanlon...
Preslip and cascade processes initiating laboratory stick slip
Gregory C. McLaskey, David A. Lockner
2014, Journal of Geophysical Research B: Solid Earth (119) 6323-6336
Recent modeling studies have explored whether earthquakes begin with a large aseismic nucleation process or initiate dynamically from the rapid growth of a smaller instability in a “cascade-up” process. To explore such a case in the laboratory, we study the initiation of dynamic rupture (stick slip) of a smooth saw-cut...
Lateritic, supergene rare earth element (REE) deposits
Mark D. Cocker
2014, Conference Paper, Arizona Geological Survey Special Paper 9
Intensive lateritic weathering of bedrock under tropical or sub-tropical climatic conditions can form a variety of secondary, supergene-type deposits. These secondary deposits may range in composition from aluminous bauxites to iron and niobium, and include rare earth elements (REE). Over 250 lateritic deposits of REE are currently known and many...
A new species of in the Rhyacophila vagrita group (Trichoptera: Rhyacophilidae) from Olympic National Park, Washington, USA.
Jonathan J Lee, J. Joseph Giersch
2014, Pan-Pacific Entomologist (90) 53-56
Rhyacophila vagrita Milne, 1936 was described from specimens collected in British Columbia and Alberta, Canada. Ross (1950), while examining R. vagrita paratypes from Alberta, discovered four males that did not fi t the R. vagrita description. These he described and named R. milnei Ross, 1950. Ross (1956) established the R....
Auroral omens of the American Civil War
Jeffrey J. Love
2014, Weatherwise (67) 34-41
Aurorae are a splendid night-time sight: coruscations of green, purple, and red fluorescent light in the form of gently wafting ribbons, billowing curtains, and flashing rays. Mostly seen at high latitudes, in the north aurorae are often called the northern lights or aurora borealis, and, in the south, the southern...
Spawning patterns of Pacific Lamprey in tributaries to the Willamette River, Oregon
M.P. Mayfield, Luke Schultz, Lance A. Wyss, B. J. Clemens, Carl B. Schreck
2014, Transactions of the American Fisheries Society (143) 1544-1554
Addressing the ongoing decline of Pacific Lamprey Entosphenus tridentatus across its range along the west coast of North America requires an understanding of all life history phases. Currently, spawning surveys (redd counts) are a common tool used to monitor returning adult salmonids, but the methods are in their infancy for Pacific Lamprey....
Micro-seismicity and seismic moment release within the Coso Geothermal Field, California
J. Ole Kaven, Stephen H. Hickman, Nicholas C. Davatzes
2014, Conference Paper, Proceedings, Thirty-Ninth Workshop on Geothermal Reservoir Engineering
We relocate 16 years of seismicity in the Coso Geothermal Field (CGF) using differential travel times and simultaneously invert for seismic velocities to improve our knowledge of the subsurface geologic and hydrologic structure. We expand on our previous results by doubling the number of relocated events from April 1996 through...
Using dissolved organic matter age and composition to detect permafrost thaw in boreal watersheds of interior Alaska
Jonathan A. O’Donnell, George R. Aiken, Michelle Ann Walvoord, Peter A. Raymond, Kenna D. Butler, Mark M. Dornblaser, Katherine Heckman
2014, Journal of Geophysical Research: Biogeosciences (119) 2155-2170
Recent warming at high latitudes has accelerated permafrost thaw, which can modify soil carbon dynamics and watershed hydrology. The flux and composition of dissolved organic matter (DOM) from soils to rivers are sensitive to permafrost configuration and its impact on subsurface hydrology and groundwater discharge. Here, we evaluate the utility...
Book review: Conservation by proxy: Indicator, umbrella, keystone, flagship, and other surrogate species
Tyler J. Grant, Peter G. Eyheralde, Melissa S. C. Telemeco, Amy L. Moorhouse, Rebecca A. Reeves, Karin Grimlund, Amy Podaril, Sarah E. Emeterio, Robert W. Klaver
2014, Prairie Naturalist (46) 109-110
No abstract available....
The USGS-National Park Service Water Quality Partnership
Alan C. Ellsworth, Mark A. Nilles, Gary Rosenlieb
2014, The George Wright Forum (31) 191-197
No abstract available....
Magmatism, metasomatism, tectonism, and mineralization in the Humboldt Range, Pershing County, Nevada
Peter G. Vikre
2014, Book
Introduction The Humboldt Range, Pershing County, Nevada, predominantly consists of Mesozoic igneous and sedimentary rocks that were modified several times by magmatism, metasomatism, and tectonism, and contain a variety of metallic (Ag, Au, Pb, Zn, Sb, W, Hg) and non-metallic (dumortierite, pinite, fluorite) mineral deposits (Knopf, 1924; Kerr and Jenney,...
A multiple-tracer approach to understanding regional groundwaterflow in the Snake Valley area of the eastern Great Basin, USA
Philip M. Gardner
2014, Applied Geochemistry (45) 33-49
Groundwater in Snake Valley and surrounding basins in the eastern Great Basin province of the western United States is being targeted for large-scale groundwater extraction and export. Concern about declining groundwater levels and spring flows in western Utah as a result of the proposed groundwater withdrawals has led to efforts that have improved...
Chemical mixtures in potable water in the U.S.
Sarah J. Ryker
2014, Book chapter, Comprehensive water quality and purification
In recent years, regulators have devoted increasing attention to health risks from exposure to multiple chemicals. In 1996, the US Congress directed the US Environmental Protection Agency (EPA) to study mixtures of chemicals in drinking water, with a particular focus on potential interactions affecting chemicals' joint toxicity. The task is...
Multisystem dating of modern river detritus from Tajikistan and China: Implications for crustal evolution and exhumation of the Pamir
Barbara Carappa, F.S. Mustapha, Michael A. Cosca, George E. Gehrels, L Schoenbhohm, E. Sobel, DeCelles.P., Joellen Russell, Paul Goodman
2014, Lithosphere (6) 443-455
The Pamir is the western continuation of Tibet and the site of some of the highest mountains on Earth, yet comparatively little is known about its crustal and tectonic evolution and erosional history. Both Tibet and the Pamir are characterized by similar terranes and sutures that can be correlated along...
Effects of fine sediment, hyporheic flow, and spawning site characteristics on survival and development of bull trout embryos
Tracy Bowerman, Bethany Neilson, Phaedra Budy
2014, Canadian Journal of Fisheries and Aquatic Sciences (71) 1059-1071
Successful spawning is imperative for the persistence of salmonid populations, but relatively little research has been conducted to evaluate factors affecting early life-stage survival for bull trout (Salvelinus confluentus), a threatened char. We conducted a field experiment to assess the relationship between site-specific environmental factors and bull trout embryo survival...
Understanding how lake populations of arctic char are structured and function with special consideration of the potential effects of climate change: A multi-faceted approach.
Phaedra Budy, Chris Luecke
2014, Oecologia (176) 81-94
Size dimorphism in fish populations, both its causes and consequences, has been an area of considerable focus; however, uncertainty remains whether size dimorphism is dynamic or stabilizing and about the role of exogenous factors. Here, we explored patterns among empirical vital rates, population structure, abundance and trend, and predicted the...
Growth and survival of Apache Trout under static and fluctuating temperature regimes
Matthew S. Recsetar, Scott A. Bonar, Olin Feuerbacher
2014, Transactions of the American Fisheries Society (143) 1247-1254
Increasing stream temperatures have important implications for arid-region fishes. Little is known about effects of high water temperatures that fluctuate over extended periods on Apache Trout Oncorhynchus gilae apache, a federally threatened species of southwestern USA streams. We compared survival and growth of juvenile Apache Trout held for 30 d in...
Characterization of microsatellite loci from two-spotted octopus Octopus bimaculatus Verrill 1883 from pyrosequencing reads
J. F. Dominguez-Contreras, A. Munguía-Vega, B. P. Ceballos-Vazquez, M. Arellano-Martinez, Melanie Culver
2014, Conservation Genetics Resources (6) 465-468
We characterized 22 novel microsatellite loci in the two-spotted octopus Octopus bimaculatus using 454 pyrosequencing reads. All loci were polymorphic and will be used in studies of marine connectivity aimed at increasing sustainability of the resource. The mean number alleles per locus was 13.09 (range 7–19) and observed heterozygosities ranged...
Flow and sorption controls of groundwater arsenic in individual boreholes from bedrock aquifers in central Maine, USA
Qiang Yang, Charles W. Culbertson, Martha G. Nielsen, Charles W. Schalk, Carole D. Johnson, Robert G. Marvinney, Martin Stute, Yan Zheng
2014, Science of the Total Environment (505) 1291-1307
To understand the hydrogeochemical processes regulating well water arsenic (As) evolution in fractured bedrock aquifers, three domestic wells with [As] up to 478 μg/L are investigated in central Maine. Geophysical logging reveals that fractures near the borehole bottom contribute 70-100% of flow. Borehole and fracture water samples from various depths...
National Oceanic and Atmospheric Administration hydrographic survey data used in a U.S. Geological Survey regional geologic framework study along the Delmarva Peninsula
Elizabeth A. Pendleton, Laura L. Brothers, E. Robert Thieler, William W. Danforth, Castle E. Parker
2014, Open-File Report 2014-1262
The U.S. Geological Survey initiated a research effort in 2014 to define the geologic framework of the Delmarva Peninsula inner continental shelf, which included new data collection and assembly of relevant extant datasets. Between 2006 and 2011, Science Applications International Corporation, under contract to the National Oceanic and Atmospheric Administration...
Postglacial eruptive history, geochemistry, and recent seismicity of Aniakchak volcano, Alaska Peninsula
Charles R. Bacon, Christina A. Neal, Thomas P. Miller, Robert G. McGimsey, Christopher J. Nye
2014, Professional Paper 1810
Aniakchak is a Pleistocene to Holocene composite volcano of the Alaska–Aleutian arc that suffered at least one caldera-forming eruption in postglacial time and last erupted in 1931. The oldest recognized postglacial eruption, Aniakchak I, produced andesite ignimbrite ca. 9,500–7,500 14C yr B.P. Subsequently, a vent northeast of the summit issued dacite–rhyodacite magma...
Meteorological data for selected sites along the Colorado River Corridor, Arizona, 2011-13
Joshua J. Caster, Timothy P. Dealy, Timothy Andrews, Helen C. Fairley, Amy E. East, Joel B. Sankey
2014, Open-File Report 2014-1247
This report presents data from 14 automated weather stations collected as part of an ongoing monitoring program within the Grand Canyon National Park and Glen Canyon Recreation Area along the Colorado River Corridor in Arizona. Weather data presented in this document include precipitation, wind speed, maximum wind gusts, wind direction,...
Petroleum systems and assessment of undiscovered oil and gas in the Anadarko Basin Province, Colorado, Kansas, Oklahoma, and Texas: USGS Province 58
Debra K. Higley
2014, Data Series 69-EE
This publication provides research results and related data in support of the U.S. Geological Survey assessment of the undiscovered oil and gas resource potential of the Anadarko Basin Province of western Oklahoma and Kansas, northern Texas, and southeastern Colorado. This province area includes the Las Animas arch of southeastern Colorado,...
Conflict minerals from the Democratic Republic of the Congo: global tantalum processing plants, a critical part of the tantalum supply chain
John F. Papp
2014, Fact Sheet 2014-3122
The U.S. Geological Survey (USGS) analyzes mineral and metal supply chains to identify and describe major components of mineral and metal material flows from ore extraction, through intermediate forms, to a final product. Supply chain analyses may be used (1) to identify risks to the United States associated with the...
