Hot Pot Detail - Evidence of Quaternary Faulting
Compilation of published data, field observations and photo interpretation relevant to Quaternary faulting at Hot Pot.
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Results for “Hot Pot”
Search indexed NASA NTRS and DOE OSTI research on propulsion, heat transfer, battery materials and energy systems. Follow report and document links to the original sources.
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Hot Pot Regional Geologic and Surface Feature Map
This archive contains an ArcGIS map package file that includes a relief base with the northern Nevada Hot Pot project area, generalized geology, selected mines, and major topographic features. Also included is a metadata file containing map features and their description.
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Advanced Seismic Data Analysis Program (The Hot Pot Project), DOE Award: DE-EE0002839 (Phase 1 Report)
A five-line (23 mile) reflection- seismic survey was conducted at the Hot Pot geothermal prospect area in north-central Nevada under the USDOE (United States Department of Energy) Geothermal Technologies Program. The project objective was to utilize innovative seismic data processing, integrated with existing geological, geophysical and geochemical information, to identify high-potential drilling targets and to reduce drilling risk. Data acquisition and interpretation took place between October 2010 and April 2011. The first round of data processing resulted in large areas of relatively poor data, and obvious reflectors known from existing subsurface information either did not appear on the seismic profiles or appeared at the wrong depth. To resolve these issues, the velocity model was adjusted to include geologic input, and the lines were reprocessed. The resulting products were significantly improved, and additional detail was recovered within the high-velocity and in part acoustically isotropic basement. Features visible on the improved seismic images include interpreted low angle thrust faults within the Paleozoic Valmy Formation, which potentially are reactivated in the current stress field. Intermediate-depth wells are currently targeted to test these features. The seismic images also suggest the existence of Paleogene sedimentary and volcanic rocks which potentially may function as a near-surface reservoir, charged by deeper structures in Paleozoic rocks.
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Hot Pot Complete Bouguer Gravity Map
Contoured Bouguer gravity survey with lease block outline in 2010 and location of hot springs.
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Hot Pot Fault Summary
Compilation of faults interpreted from seismic reflection survey and from field observations.
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Hot Pot Mercury Concentration Map
Location of sample points and analytical results for mercury concentrations from a soil survey.
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Hot Pot Contoured Temperature Gradient Map
Temperature gradient contours derived from Oski temperature gradient hole program and from earlier published information.
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Hot Pot Field Observations
Map of field observations including depressions, springs, evidence of former springs, travertine terraces and vegetation patterns. Map also contains interpretation of possible spring alignments.
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Location Map
Map file package containing shaded relief base with Hot Pot project area, major roads, railroads, and rivers. The inset map shows regional Paleozoic structural elements.
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Production and Early Preservation of Lipid Biomarkers in Iron Hot Springs
The bicarbonate-buffered anoxic vent waters at Chocolate Pots hot springs in Yellowstone National Park are 51–54°C, pH 5.5–6.0, and are very high in dissolved Fe(II) at 5.8–5.9 mg/L. The aqueous Fe(II) is oxidized by a combination of biotic and abiotic mechanisms and precipitated as primary siliceous nanophase iron oxyhydroxides (ferrihydrite). Four distinct prokaryotic photosynthetic microbial mat types grow on top of these iron deposits. Lipids were used to characterize the community composition of the microbial mats, link source organisms to geologically significant biomarkers, and investigate how iron mineralization degrades the lipid signature of the community. The phospholipid and glycolipid fatty acid profiles of the highest-temperature mats indicate that they are dominated by cyanobacteria and green nonsulfur filamentous anoxygenic phototrophs (FAPs). Diagnostic lipid biomarkers of the cyanobacteria include midchain branched mono- and dimethylalkanes and, most notably, 2-methylbacteriohopanepolyol. Diagnostic lipid biomarkers of the FAPs (Chloroflexus and Roseiflexus spp.) include wax esters and a long-chain tri-unsaturated alkene. Surprisingly, the lipid biomarkers resisted the earliest stages of microbial degradation and diagenesis to survive in the iron oxides beneath the mats. Understanding the potential of particular sedimentary environments to capture and preserve fossil biosignatures is of vital importance in the selection of the best landing sites for future astrobiological missions to Mars. Finally, this study explores the nature of organic degradation processes in moderately thermal Fe(II)-rich groundwater springs—environmental conditions that have been previously identified as highly relevant for Mars exploration.
Environmental Molecular Sciences Laboratory↗
Proposed Drill Sites
Proposed drill sites for intermediate depth temperature gradient holes and/or deep resource confirmation wells. Temperature gradient contours based on shallow TG program and faults interpreted from seismic reflection survey are shown, as are two faults interpreted by seismic contractor Optim but not by Oski Energy, LLC.
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Preliminary Drill Sites
Preliminary locations for intermediate depth temperature gradient holes and/or resource confirmation wells based on compilation of geological, geophysical and geochemical data prior to carrying out the DOE-funded reflection seismic survey.
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Spectral Modeling of Residual Stress and Stored Elastic Strain Energy in Thermal Barrier Coatings
Solutions to the thermoelastic problem are important for characterizing the response under temperature change of refractory systems. This work extends a spectral fast Fourier transform (FFT) technique to analyze the thermoelastic behavior of thermal barrier coatings (TBCs), with the intent of probing the local origins of failure in TBCs. The thermoelastic FFT (teFFT) approach allows for the characterization of local thermal residual stress and strain fields, which constitute the origins of failure in TBC systems. A technique based on statistical extreme value theory known as peaks-over-threshold (POT) is developed to quantify the extreme values ("hot spots") of stored elastic strain energy (i.e., elastic energy density, or EED). The resolution dependence of the teFFT method is assessed through a sensitivity study of the extreme values in EED. The sensitivity study is performed both for the local (point-by-point) eld distributions as well as the grain scale eld distributions. A convergence behavior to a particular distribution shape is demonstrated for the local elds. The grain scale fields are shown to exhibit a possible convergence to a maximum level of EED. To apply the teFFT method to TBC systems, 3D synthetic microstructures are created to approximate actual TBC microstructures. The morphology of the grains in each constituent layer as well as the texture is controlled. A variety of TBC materials, including industry standard materials and potential future materials, are analyzed using the teFFT. The resulting hot spots are quantified using the POT approach. A correlation between hot spots in EED and interface rumpling between constituent layers is demonstrated, particularly for the interface between the bond coat (BC) and the thermally grown oxide (TGO) layer.
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The intrinsic electrochemical behavior of layered Cu 2 WSe 4 nanoparticles
Nanoplates of Cu 2 WSe 4 (~50 nm) were synthesized via a hot-injection method by one-pot selenation of WCl 6 and Cu(acac) 2 . This synthetic route provided another perspective towards the intrinsic electrochemical properties of Cu 2 MSe 4 (M = Mo or W), where their nanoparticles were previously synthesized via a metathesis route. In conclusion, cations-dependent cathodic events and surface activation anodic events were identified by cyclic voltammetry in acetonitrile.
77 NANOSCIENCE AND NANOTECHNOLOGY↗
Characterization of fission gas bubbles in irradiated U-10Mo fuel
Irradiated U-10Mo fuel samples were prepared with traditional mechanical potting and polishing methods with in a hot cell. They were then removed and imaged with an SEM located outside of a hot cell. The images were then processed with basic imaging techniques from 3 separate software packages. The results were compared and a baseline method for characterization of fission gas bubbles in the samples is proposed. It is hoped that through adoption of or comparison to this baseline method that sample characterization can be somewhat standardized across the field of post irradiated examination of metal fuels.
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Investigating the Role π -Rich Solvents Play in the Growth of Cesium Lead Bromide Nanocrystals
In this report, the role that a high-boiling-point solvent type plays on the nucleation and growth, morphology, and crystal-phase transformation of cesium lead bromide nanocrystals (CsPbBr 3 ) is studied. The CsPbBr 3 products were compared between a one-pot growth mechanism at room temperature (RT) versus a hot-injection mechanism (HI) control using dibenzyl ether (DBE), diphenyl ether (DPE), dioctyl ether (DOE), or 1- octadecene (ODE). The coordination between these solvents and the PbBr 2 salt precursors resulted in different plumbate [PbSBr n ] 2−n precursors being formed. The S-to-Pb 2+ coordination within [PbSBr n ] 2−n was probed by UV−vis and solvent-phase 207 Pb NMR, both of which showed considerable coordination between [PbSBr n ] 2−n and the π-rich DBE and DPE, whose reactivity affected CsPbBr 3 growth. The effect was more pronounced for CsPbBr 3 prepared via RT, where the morphology was tunable, with π-rich solvents producing thin rod-like CsPbB r3 with a blue emission, compared to the green-emitting thicker platelets formed via HI. While XRD showed crystalline products for both RT and HI, with orthorhombic and cubic forms, respectively, the RT products had considerable surface defects, as was indicated by lower quantum yields, and to understand this the photoluminescent lifetimes were measured by time-correlated single photon counting.
207Pb NMR↗
Provisional Conceptual Model of the Camas Prairie (ID) Geothermal System from Play Fairway Analysis
Camas Prairie, Idaho, is an EW-trending structural graben that lies north of the Snake River Plain hotspot track. It is bounded on the north by the Idaho Batholith, and on the south by the Mount Bennett Hills. This region was investigated by the SRP Geothermal Play Fairway Analysis team, which included focused geologic, geochemical, and geophysical studies. The Camas Prairie geothermal system resource is indicated by warm springs and wells, geophysical analysis of buried faults and basins, mapped faults, structural analysis of all faults and lineaments, high 3He/4He, cation and multicomponent geothermometry, and the occurrence of young basalt vents and lava flows along the range front. Our provisional conceptual model includes the following components: (1) High permeability is indicated by the confluence of intersecting faults, including the major range front system and The Pothole fault system, with releasing bends as deduced from detailed field studies, and the presence of springs along mapped structural features; (2) High heat is inferred to result from mid- to shallow crustal sills, as evidenced by the location of vents along the range front; the youngest dated vent is 692 ka, but 2 ka vents lie to NW; (3) an effective seal is indicated by magnetotelluric studies, which suggest a clay seal over the prospective target area that is likely a result of hydrothermal alteration. This model is similar to that proposed for the western SRP but is less energetic due to the smaller volume of magma inferred. It is also similar to Basin-and-Range geothermal systems, but differs by including a distinct magmatic heat component.
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Measurements of emittance at low energy
Ideally, experimental measurements of all beam parameters should be made at the exit of the injector. This has not been possible on DARHT Axis-II for various practical reasons. In particular, the emittance has not been measured there. This note reviews the methods we have used for emittance measurements on the linear induction accelerator (LIA) at low-energy (< 10 MeV). It includes a discussion of some of the issues associated with making those measurements on a beam from the injector. A successful plan for emittance measurements at any energy should incorporate measures to deal with these issues. To begin with, it should be recognized that emittance measurements at the injector are not critical for beam physics in the accelerator. The emittance at the injector has very little effect on accelerator beam dynamics except for an increase in size near the end, where the beam becomes emittance dominated. Therefore, imperfect knowledge has little effect on the design and implementation of a tune. This point is illustrated in Fig. 1, which shows beam envelope calculations for our present tune over a wide range of emittances. Compare this with using the wrong diode voltage in the tune design. Figure 2 shows the effect on the beam envelope of a 2% error in the measurement of diode voltage. Therefore, a few years ago, when we made plans for beam measurements at the diode while we were upgrading the injector cells, our highest priority was on magnetic spectrometer measurements of energy. These measurements were to be used to cross calibrate the diode-voltage monitor, so that accurate diode voltage measurements could be made on every shot after the spectrometer was removed. If emittance measurements at the injector are required, then three widely used methods should be considered. These are focusing magnet scans, the use of an emittance mask (pepper pot), and optical transition radiation (OTR). We have used all three of these on our accelerators. These are invasive methods. There are noninvasive methods that we have not yet used. For example, under some conditions the beam size obtained with diamagnetic loops can be used in conjunction with the envelope equation to infer emittance. To date our diamagnetic loop data has not been of sufficient quality to do this. Another technique is to measure the beam-distribution quadrupole moment with BPMs dispersed in a quadrupole magnet lattice. Our BPMs have this capability, but the only quad lattice is in the downstream transport (DST), so this method is deferred until we operate the DST. All three methods reviewed here are invasive, and require the insertion of a target into the beam. Therefore, there is always the accompanying risk of inadvertent destruction of the target, and scattering of target material throughout the accelerator or injector. The target damage mechanism is target heating to a temperature hot enough to evolve gas, which is impact ionized by the beam, which is then ion focused to a small enough spot for the energy density to damage the target material, often destructively. Target heating is directly proportional to beam current density and pulse length. Therefore, the key to minimizing risk of target damage is to design for a large beam at the target, low current from the diode, and the shortest possible current pulse. The large-beam requirement compromises emittance measurements with OTR or focal scans, but not with the pepper pot technique. Finally, to ensure a short pulse even if the crowbar fails, the Marx generator should be reconfigured to produce the shortest possible pulse.
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