Conference Papers
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Midcontinent microcosm: Geology of the Atkins lake - Marengo falls area (Field trip 2) Midcontinent microcosm: Geology of the Atkins lake - Marengo falls area (Field trip 2)
Archean and Proterozoic rocks exposed over about 16km2 between Atkins Lake and Coffee Lake in southeastern Bayfield County (Fig. 1) chronicle almost all of the major Precambrian geologic events in the history of the southern Superior Craton. The oldest rocks are part of a locally gneissic quartz monzonite complex, the Puritan Batholith, with an igneous Rb-Sr age of 2710+140 Ma (Sims et...
Authors
Marcia Bjornerud, William F. Cannon
Mineralogic sources of metals in leachates from the weathering of sedex, massive sulfide, and vein deposit mining wastes Mineralogic sources of metals in leachates from the weathering of sedex, massive sulfide, and vein deposit mining wastes
Weathered mine waste consists of oxidized primary minerals and chemically unstable secondary phases that can be sources of readily soluble metals and acid rock drainage. Elevated concentrations of metals such as Cd, Cu, Fe, Mn, Ni, Pb, and Zn are observed in deionized water-based leachate solutions derived from complex sedex and Cu-Pb-Zn mine wastes. Leachate (USGS FLT) from the...
Authors
S. F. Diehl, P. L. Hageman, R.R. Seal, N.M. Piatak, H. Lowers
Modeling the spatial-temporal dynamics of net primary production in Yangtze River Basin using IBIS model Modeling the spatial-temporal dynamics of net primary production in Yangtze River Basin using IBIS model
The climate change has significantly affected the carbon cycling in Yangtze River Basin. To better understand the alternation pattern for the relationship between carbon cycling and climate change, the net primary production (NPP) were simulated in the study area from 1956 to 2006 by using the Integrated Biosphere Simulator (IBIS). The results showed that the average annual NPP per...
Authors
Z. Zhang, H. Jiang, J. Liu, Q. Zhu, X. Wei, Z. Jiang, G. Zhou, X. Zhang, J. Han
Molecular characterization and comparison of shale oils generated by different pyrolysis methods using FT-ICR mass spectrometry Molecular characterization and comparison of shale oils generated by different pyrolysis methods using FT-ICR mass spectrometry
Fourier transform ion cyclotron resonance mass spectrometry (FT ICR-MS) was applied in the analysis of shale oils generated using two different pyrolysis systems under laboratory conditions meant to simulate surface and in situ oil shale retorting. Significant variations were observed in the shale oils, particularly the degree of conjugation of the constituent molecules. Comparison of FT...
Authors
J.M. Jin, S. Kim, J.E. Birdwell
Monitoring and inversion on land subsidence over mining area with InSAR technique Monitoring and inversion on land subsidence over mining area with InSAR technique
The Wulanmulun town, located in Inner Mongolia, is one of the main mining areas of Shendong Company such as Shangwan coal mine and Bulianta coal mine, which has been suffering serious mine collapse with the underground mine withdrawal. We use ALOS/PALSAR data to extract land deformation under these regions, in which Small Baseline Subsets (SBAS) method was applied. Then we compared InSAR...
Authors
Y. Wang, Q. Zhang, C. Zhao, Z. Lu, X. Ding
Multi-species attributes as the condition for adaptive sampling of rare species using two-stage sequential sampling with an auxiliary variable Multi-species attributes as the condition for adaptive sampling of rare species using two-stage sequential sampling with an auxiliary variable
Assessing populations of rare species is challenging because of the large effort required to locate patches of occupied habitat and achieve precise estimates of density and abundance. The presence of a rare species has been shown to be correlated with presence or abundance of more common species. Thus, ecological community richness or abundance can be used to inform sampling of rare...
Authors
B. Panahbehagh, D. R. Smith, M.M. Salehi, D.J. Hornbach, D.J. Brown
Multicomponent seismic methods for characterizing gas hydrate occurrences and systems in deep-water Gulf of Mexico Multicomponent seismic methods for characterizing gas hydrate occurrences and systems in deep-water Gulf of Mexico
In-situ characterization and quantification of natural gas hydrate occurrences remain critical research directions, whether for energy resource, drilling hazard, or climate-related studies. Marine multicomponent seismic data provide the full seismic wavefield including partial redundancy, and provide a promising set of approaches for gas hydrate characterization. Numerous authors have...
Authors
Seth S. Haines, Myung W. Lee, Timothy S. Collett, Bob A. Hardage
National intergrated drought information system National intergrated drought information system
[No abstract available]
Authors
R. Pulwarty, J. Verdin, L. Darby, C. McNutt, R. Webb
Near-field hazard assessment of March 11, 2011 Japan Tsunami sources inferred from different methods Near-field hazard assessment of March 11, 2011 Japan Tsunami sources inferred from different methods
Tsunami source is the origin of the subsequent transoceanic water waves, and thus the most critical component in modern tsunami forecast methodology. Although impractical to be quantified directly, a tsunami source can be estimated by different methods based on a variety of measurements provided by deep-ocean tsunameters, seismometers, GPS, and other advanced instruments, some in real...
Authors
Y. Wei, V.V. Titov, A. Newman, G. Hayes, Liujuan Tang, C. Chamberlin
Nest predation and circulating corticosterone levels within and among species Nest predation and circulating corticosterone levels within and among species
Variation in the risk of predation to offspring can influence the expression of reproductive strategies both within and among species. Appropriate expression of reproductive strategies in environments that differ in predation risk can have clear advantages for fitness. Although adult-predation risk appears to influence glucocorticosteroid levels, leading to changes in behavioral and life...
Authors
J.J. Fontaine, E. Arriero, H. Schwabl, T. E. Martin
Nest-site fidelity and dispersal of Gyrfalcons estimated by noninvasive genetic sampling Nest-site fidelity and dispersal of Gyrfalcons estimated by noninvasive genetic sampling
We used feathers from adult Gyrfalcons (Falco rusticolus) molted in breeding territories and blood samples from nestlings to document nest-site fidelity and dispersal of breeding adults and juveniles at three areas 100- 350 km apart in Yukon Delta National Wildlife Refuge, Alaska, 2003-2007. We used genotypes from seven polymorphic microsatellite loci that provided a mean probability of...
Authors
Travis L. Booms, Sandra L. Talbot, George K. Sage, Brian J. McCaffery, Kevin G. McCracken, Philip F. Schempf
Nine endangered taxa, one recovering ecosystem: Identifying common ground for recovery on Santa Cruz Island, California Nine endangered taxa, one recovering ecosystem: Identifying common ground for recovery on Santa Cruz Island, California
It is not uncommon to have several rare and listed taxa occupying habitats in one landscape or management area where conservation amounts to defense against the possibility of further loss. It is uncommon and extremely exciting, however, to have several listed taxa occupying one island that is managed cooperatively for conservation and recovery. On Santa Cruz Island, the largest of the...
Authors
A. Kathryn McEachern, Dieter H. Wilken