Conference Papers
Science Quality and Integrity
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The USGS provides unbiased, objective, and impartial scientific information upon which our audiences, including resource managers, planners, and other entities, rely.
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Subsurface monitoring of anthropogenic CO 2 injected in sedimentary basins: Results from the Frio-I brine test, Texas, USA
To investigate the potential for the long-term storage of CO 2 in deep saline aquifers, 1600 t of CO 2 were injected at 1500m depth into a 24-m-thick "C" sandstone of the Frio Formation near Houston, Texas. Fluid samples obtained before CO 2 injection from the injection well and an observation well 30m updip showed a Na-Ca-Cl type brine with ∼93,000 mg/L TDS at saturation with CH 4, but only 0.3%
Authors
Y.K. Kharaka, J.J. Thordsen, S.D. Hovorka, H.S. Nance, D.R. Cole, T.J. Phelps, K.G. Knauss
An overview of the Valles Caldera National Preserve: the natural and cultural resources
The Valles Caldera National Preserve is one of New Mexico’s natural wonders and a popular area for public recreation, sustainable natural resource production, and scientific research and education. Here, we provide a concise overview of the natural and cultural history of the Preserve, including descriptions of the ecosystems, flora and fauna. We note that, at the landscape scale, the Valles calde
Authors
Robert R. Parmenter, Anastasia Steffen, Craig D. Allen
The effect of scientific and socioeconomic uncertainty on a natural hazards policy choice
No abstract available.
Authors
R. L. Bernknopf, P.P. Hearn, Anne M. Wein, David R. Strong
Exploration of the deep Gulf of Mexico slope using DSV Alvin: Site selection and geologic character
The Gulf of Mexico is well known for its hydrocarbon seeps, associated chemosynthetic communities, and gas hydrates. However, most direct observations and samplings of seep sites have been concentrated above water depths of approximately 3000 ft (1000 m) because of the scarcity of deep diving manned submersibles. In the summer of 2006, Minerals Management Service (MMS) and National Oceanic and Atm
Authors
Harry H. Roberts, C.R. Fisher, J.M. Brooks, Bernie Bernard, R.S. Carney, Erik E. Cordes, William Shedd, Jesse Hunt, Samantha B. Joye, Ian R. MacDonald, Cheryl Morrison
Developing a new method of measuring dissolution rates of silicate minerals using changes in the isotopic ratio of a spiked solution
Weathering in the field tends to be incongruent due to the precipitation of secondary phases. However, most laboratory experiments are designed to avoid such precipitation, as it complicates the interpretation of the experimental results. Here we report on a new method that eliminates the effect of secondary phase precipitation on the determination of the dissolution rate of a primary mineral. The
Authors
L. Harpaz, J. Ganor, T.D. Bullen
Chemical weathering of a marine terrace chronosequence, Santa Cruz, California: Deciphering reaction rates from mineral depth profiles
A soil chronosequence developed on marine terraces along coastal California, exhibits deeper and more intensively weathered mineral profiles with increasing age (65 to 226 kyrs). Feldspar concentrations generally increase linearly with terrace depth. The slope or weathering gradient is defined by the ratio of the weathering rate and the velocity at which the profile penetrates into the regolith.A
Authors
Arthur F. White, Marjorie S. Schulz, Davison V. Vivit, David A. Stonestrom, Alex E. Blum
Beating effect identified from seismic responses of instrumented buildings
Beating effects observed in the recorded responses of buildings are examined in this paper. Beating is a periodic, resonating and prolonged vibrational behavior caused by distinctive close coupling of translational and torsional modes of a lightly damped structure. Repetitively stored potential energy during the coupled translational and torsional deformations turns into repetitive vibrational ene
Authors
Mehmet Çelebi
Report on the final completion of the Unified Lunar Control Network 2005 and Lunar Topographic Model
In order to highlight this project to the extraterrestrial mapping community, we repeat here our earlier abstract [1], with a corrected Figure 2. A report describing the Unified Lunar Control Network 2005 and the files associated with that network is now available as an on-line USGS Open-File Report [2] at the location http://pubs.usgs.gov/of/2006/1367/. A “Readme” file describes the available fil
Authors
Brent A. Archinal, Mark R. Rosiek, Randolph L. Kirk, Trent M. Hare, Bonnie L. Redding
First stereoscopic radar images of Titan
Saturn's giant, cloud-covered satellite Titan, larger than the planet Mercury, is the last major piece of unexplored real estate in the Solar system. The NASA/ESA Cassini spacecraft carries a variety of instruments that are being used to map the surface of Titan, including optical instruments that provide a global synoptic view and spectroscopic information, and microwave imager (Cassini Titan R
Authors
Randolph L. Kirk, Elpitha Howington-Kraus, K. L. Mitchell, S. Hensley, B.W. Stiles
Urgent processing and control of lunar data
There is an urgent, time-critical need to begin tying together (geodetically controlling) all past and current lunar data, and to establish the cartographic foundation needed to make maximum use of future planned lunar data. Proper control of lunar datails required to properly support both lunar science and exploration, and at present we know of no plans within NASA to fund such work adequately. T
Authors
Brent A. Archinal, Lisa R. Gaddis, Randolph L. Kirk, Trent M. Hare, Mark R. Rosiek
Resolution effects in radarclinometry
Data from the Cassini-Huygens mission, in particular images from the Cassini Titan Radar Mapper (RADAR) have revealed Saturn's giant moon, Titan to be a world whose geologic diversity and complexity approach those of the Earth itself. Estimates of topographic relief are, naturally, of enormous interest in the effort to understand the nature of Titan's surface features and quantify the processes by
Authors
Randolph L. Kirk, Jani Radebaugh
The HRSC DTM test
The High Resolution Stereo Camera (HRSC, [1]) is part of the orbiter payload on the Mars Express (MEX) mission of the European Space Agency (ESA), orbiting the Red Planet in a highly elliptical orbit since January 2004. For the first time in planetary exploration, a camera system has especially been designed to meet the requirements of photogrammetry and cartography for mapping the complete surfac
Authors
Christian Heipke, Jürgen Oberst, Jeorg Albertz, Maria Attwenger, Peter Dorninger, Egon Dorrer, M. Ewe, Stephan Gehrke, Klaus Gwinner, H. Hirschmuller, J.R. Kim, Randolph L. Kirk, H. Mayer, Jan-Peter Muller, Rajagopalan Rengarajan, M. Rentsch, R. Schmidt, Frank Scholten, J. Shan, Michael Spiegel, M. Wahlisch, Gerhard Neukum