Descriptive models, grade-tonnage relations, and databases for the assessment of sediment-hosted copper deposits: with emphasis on deposits in the Central Africa Copperbelt, Democratic Republic of the Congo and Zambia: Chapter J in Global mineral resource assessment
Cliff D. Taylor, J. Douglas Causey, Paul Denning, Jane M. Hammarstrom, Timothy S. Hayes, John D. Horton, Michael J. Kirschbaum, Heather L. Parks, Anna B. Wilson, Niki E. Wintzer, Michael L. Zientek
2013, Scientific Investigations Report 2010-5090-J
The Central African Copperbelt (CACB) is one of the most important copper-producing regions of the world. The majority of copper produced in Africa comes from this region defined by the Neoproterozoic Katanga sedimentary basin of the southern Democratic Republic of the Congo (DRC) and northern Zambia. Copper in the CACB...
Mapping bedrock surface contours using the horizontal-to-vertical spectral ratio (HVSR) method near the middle quarter srea, Woodbury, Connecticut
Craig J. Brown, Emily B. Voytek, John W. Lane Jr., Janet Radway Stone
2013, Open-File Report 2013-1028
The bedrock surface contours in Woodbury, Connecticut, were determined downgradient of a commercial zone known as the Middle Quarter area (MQA) using the novel, noninvasive horizontal-to-vertical (H/V) spectral ratio (HVSR) passive seismic geophysical method. Boreholes and monitoring wells had been drilled in this area to characterize the shallow subsurface to...
Metal prices in the United States through 2010
Water Resources Division, U.S. Geological Survey
2013, Scientific Investigations Report 2012-5188
This report, which updates and revises the U.S. Geological Survey (USGS) (1999) publication, “Metal Prices in the United States Through 1998,” presents an extended price history for a wide range of metals available in a single document. Such information can be useful for the analysis of mineral commodity issues, as...
Seismic imaging of the Waltham Canyon fault, California: comparison of ray‐theoretical and Fresnel volume prestack depth migration
Klaus Bauer, Trond Ryberg, Gary S. Fuis, Stefan Luth
2013, Bulletin of the Seismological Society of America (103) 340-352
Near‐vertical faults can be imaged using reflected refractions identified in controlled‐source seismic data. Often theses phases are observed on a few neighboring shot or receiver gathers, resulting in a low‐fold data set. Imaging can be carried out with Kirchhoff prestack depth migration in which migration noise is suppressed by constructive...
Novel and non-traditional use of stable isotope tracers to study metal bioavailability from natural particles
Marie-Noële Croteau, Daniel J. Cain, Christopher C. Fuller
2013, Environmental Science & Technology (47) 3424-3431
We devised a novel tracing approach that involves enriching test organisms with a stable metal isotope of low natural abundance prior to characterizing metal bioavailability from natural inorganic particles. In addition to circumventing uncertainties associated with labeling natural particles and distinguishing background metals, the proposed "reverse labeling" technique overcomes many...
Evapotranspiration from marsh and open-water sites at Upper Klamath Lake, Oregon, 2008--2010
David I. Stannard, Marshall W. Gannett, Danial J. Polette, Jason M. Cameron, M. Scott Waibel, J. Mark Spears
2013, Scientific Investigations Report 2013-5014
Water allocation in the Upper Klamath Basin has become difficult in recent years due to the increase in occurrence of drought coupled with continued high water demand. Upper Klamath Lake is a central component of water distribution, supplying water downstream to the Klamath River, supplying water for irrigation diversions, and...
Characterization of oil shale, isolated kerogen, and post-pyrolysis residues using advanced 13 solid-state nuclear magnetic resonance spectroscopy
Xiaoyan Cao, Justin E. Birdwell, Mark A. Chappell, Yuan Li, Joseph J. Pignatello, Jingdong Mao
2013, American Association of Petroleum Geologists Bulletin (97) 421-436
Characterization of oil shale kerogen and organic residues remaining in postpyrolysis spent shale is critical to the understanding of the oil generation process and approaches to dealing with issues related to spent shale. The chemical structure of organic matter in raw oil shale and spent shale samples was examined in...
Identifying buried segments of active faults in the northern Rio Grande Rift using aeromagnetic, LiDAR,and gravity data, south-central Colorado, USA
V. J. S. Grauch, Chester A. Ruleman
2013, International Journal of Geophysics (2013)
Combined interpretation of aeromagnetic and LiDAR data builds on the strength of the aeromagnetic method to locate normal faults with significant offset under cover and the strength of LiDAR interpretation to identify the age and sense of motion of faults. Each data set helps resolve ambiguities in interpreting the other....
Simulation of the shallow groundwater-flow system in the Forest County Potawatomi Community, Forest County, Wisconsin
Michael N. Fienen, David A. Saad, Paul F. Juckem
2013, Scientific Investigations Report 2012-5289
The shallow groundwater system in the Forest County Potawatomi Comminity, Forest County, Wisconsin, was simulated by expanding and recalibrating a previously calibrated regional model. The existing model was updated using newly collected water-level measurements, inclusion of surface-water features beyond the previous near-field boundary, and refinements to surface-water features. The updated...
Modelling dendritic ecological networks in space: anintegrated network perspective
Erin E. Peterson, Jay M. Ver Hoef, Dan J. Isaak, Jeffrey A. Falke, Marie-Josée Fortin, Chris E. Jordon, Kristina McNyset, Pascal Monestiez, Aaron S. Ruesch, Aritra Sengupta, Nicholas Som, E. Ashley Steel, David M. Theobald, Christian E. Torgersen, Seth J. Wenger
2013, Ecology Letters (16) 707-719
Dendritic ecological networks (DENs) are a unique form of ecological networks that exhibit a dendritic network topology (e.g. stream and cave networks or plant architecture). DENs have a dual spatial representation; as points within the network and as points in geographical space. Consequently, some analytical methods used to quantify relationships...
Owyhee River intracanyon lava flows: does the river give a dam?
Lisa L. Ely, Cooper C. Brossy, P. Kyle House, Elizabeth B. Safran, Jim E. O'Connor, Duane E. Champion, Cassandra R. Fenton, Ninad R. Bondre, Caitlin A. Orem, Gordon E. Grant, Christopher D. Henry, Brent D. Turrin
2013, GSA Bulletin (124) 1667-1687
Rivers carved into uplifted plateaus are commonly disrupted by discrete events from the surrounding landscape, such as lava flows or large mass movements. These disruptions are independent of slope, basin area, or channel discharge, and can dominate aspects of valley morphology and channel behavior for many kilometers. We document and...
Arsenic induced toxicity in broiler chicks and its alleviation with ascorbic acid: a toxico-patho-biochemical study
Ahrar Khan, Rabia Sharaf, Muhammad Zargham Khan, Muhammad Kashif Saleemi, Fazal Mahmood
2013, International Journal of Agriculture & Biology (15) 1105-1111
To find out toxico-pathological effects of arsenic (As) and ameliorating effect of ascorbic acid (Vit C), broilers birds were administered 50 and 250 mg/kg arsenic and Vit C, respectively alone/in combination. As-treated birds exhibited severe signs of toxicity such as dullness, depression, increased thirst, open mouth breathing and watery diarrhea....
Migration and habitat preferences of Swainson's Hawks at an autumn stopover site in northwestern Texas
Carroll D. Littlefield, Douglas H. Johnson
2013, Journal of Raptor Research (47) 54-59
Unlike most raptors, the Swainson's Hawk (Buteo swainsoni) migrates long distances between breeding and wintering ranges, which elevates the importance of stopover sites for foraging. We conducted three years of fall surveys in the Southern High Plains of Texas. Migrant Swainson's Hawks moved through the area mostly between July and...
Improving understanding of near-term barrier island evolution through multi-decadal assessment of morphologic change
Erika E. Lentz, Cheryl J. Hapke, Hilary F. Stockdon, Rachel E. Hehre
2013, Marine Geology (337) 125-139
Observed morphodynamic changes over multiple decades were coupled with storm-driven run-up characteristics at Fire Island, New York, to explore the influence of wave processes relative to the impacts of other coastal change drivers on the near-term evolution of the barrier island. Historical topography was generated from digital stereo-photogrammetry and compared...
Survival and home-range size of Northern Spotted Owls in southwestern Oregon
Jason W. Schilling, Katie M. Dugger, Robert G. Anthony
2013, Journal of Raptor Research (47) 1-14
In the Klamath province of southwestern Oregon, Northern Spotted Owls (Strix occidentalis caurina) occur in complex, productive forests that historically supported frequent fires of variable severity. However, little is known about the relationships between Spotted Owl survival and home-range size and the characteristics of fire-prone, mixed-conifer forests of the Klamath...
Characterization and simulation of fate and transport of selected volatile organic compounds in the vicinities of the Hadnot Point Industrial Area and landfill
L. Elliott Jones, René J. Suárez-Soto, Barbara A. Anderson, Morris L. Maslia
2013, Report, Analyses and historical reconstruction of groundwater flow, contaminant fate and transport, and distribution of drinking water within the service areas of the Hadnot Point and Holcomb Boulevard Water Treatment Plants and vicinities, U.S. Marine Corps Base Camp Lejeune, North Carolina
This supplement of Chapter A (Supplement 6) describes the reconstruction (i.e. simulation) of historical concentrations of tetrachloroethylene (PCE), trichloroethylene (TCE), and benzene3 in production wells supplying water to the Hadnot Base (USMCB) Camp Lejeune, North Carolina (Figure S6.1). A fate and transport model (i.e., MT3DMS [Zheng and Wang 1999]) was...
Modeling lahar behavior and hazards
Vernon Manville, Jon J. Major, Sarah A. Fagents
2013, Book chapter, Modeling volcanic processes: the physics and mathematics of volcanism
Lahars are highly mobile mixtures of water and sediment of volcanic origin that are capable of traveling tens to > 100 km at speeds exceeding tens of km hr-1. Such flows are among the most serious ground-based hazards at many volcanoes because of their sudden onset, rapid advance rates, long...
Uncertainty in assessing the impacts of global change with coupled dynamic species distribution and population models
Erin Conlisk, Alexandra D. Syphard, Janet Franklin, Lorraine E. Flint, Alan L. Flint, Helen Regan
2013, Global Change Biology (19) 858-869
Concern over rapid global changes and the potential for interactions among multiple threats are prompting scientists to combine multiple modelling approaches to understand impacts on biodiversity. A relatively recent development is the combination of species distribution models, land‐use change predictions, and dynamic population models to predict the relative and combined...
SedPods: a low-cost coral proxy for measuring net sedimentation
Michael E. Field, Henry Chezar, Curt D. Storlazzi
2013, Coral Reefs (32) 155-159
Sediment derived from impaired watersheds is a major stressor to adjacent coral reefs globally. To better understand stresses generated by specific processes and events, many coral reef scientists seek to collect physical samples of settling particles and obtain reproducible information about net rates of sediment accumulation on coral reefs. Yet,...
ʻŌhiʻa Lehua rainforest: born among Hawaiian volcanoes, evolved in isolation: the story of a dynamic ecosystem with relevance to forests worldwide
Dieter Mueller-Dombois, James D. Jacobi, Hans Juergen Boehmer, Jonathan P. Price
2013, Book
In the early 1970s, a multidisciplinary team of forest biologists began a study of Hawaiian ecosystems under the International Biological Program (IBP). Research focus was on the intact native ecosystems in and around Hawai'i Volcanoes National Park, in particular the ʻŌhiʻa Lehua rainforest. Patches of dead ʻŌhiʻa stands had been...
Application and evaluation of electromagnetic methods for imaging saltwater intrusion in coastal aquifers: Seaside Groundwater Basin, California
Vanessa Nenna, Daan Herckenrather, Rosemary Knight, Nick Odlum, Darcy McPhee
2013, Geophysics (78) B77-B88
Developing effective resource management strategies to limit or prevent saltwater intrusion as a result of increasing demands on coastal groundwater resources requires reliable information about the geologic structure and hydrologic state of an aquifer system. A common strategy for acquiring such information is to drill sentinel wells near the coast...
Size distribution of Parkfield’s microearthquakes reflects changes in surface creep rate
Theresa Tormann, Stefan Wiemer, Sabrina Metzger, Andrew J. Michael, Jeanne L. Hardebeck
2013, Geophysical Journal International (193) 1474-1478
The nucleation area of the series of M6 events in Parkfield has been shown to be characterized by low b-values throughout the seismic cycle. Since low b-values represent high differential stresses, the asperity structure seems to be always stably stressed and even unaffected by the latest main shock in 2004....
Effect of long-term understory prescribed burning on standing and down dead woody material in dry upland oak forests
John A. Polo, S.W. Hallgren, David M. Leslie Jr.
2013, Forest Ecology and Management (291) 128-135
Dead woody material, long ignored or viewed as a nuisance for forest management, has gained appreciation for its many roles in the forest including wildlife habitat, nutrient storage and cycling, energy for trophic webs, protection of soil, fuel for fire and carbon storage. The growing interest in managing dead woody...
Evaluation of ISCCP multisatellite radiance calibration for geostationary imager visible channels using the moon
Thomas C. Stone, William B. Rossow, Joseph Ferrier, Laura M. Hinkelman
2013, IEEE Transactions on Geoscience and Remote Sensing (51) 1255-1266
Since 1983, the International Satellite Cloud Climatology Project (ISCCP) has collected Earth radiance data from the succession of geostationary and polar-orbiting meteorological satellites operated by weather agencies worldwide. Meeting the ISCCP goals of global coverage and decade-length time scales requires consistent and stable calibration of the participating satellites. For the...
Observed changes in phenology across the USA: A regional review for the 2013 National Climate Assessment, Great Plains Regional Information Sheet.
Stacey A. Leicht-Young, Carolyn A.F. Enquist, Jake F. Weltzin
2013, Report
This is one in a series of eight, geographic region-focused information sheets that summarizes documented changes in plant and animal phenology over the past century across the United States. This summary is based on long-term studies (10 years or more) published in the primary scientific literature since 2001. A forthcoming...
