A5080999383- Hydrocarbon exploration and reservoir analysis
- Geological and Geochemical Analysis
- Methane Hydrates and Related Phenomena
- Reservoir Engineering and Simulation Methods
- Geology and Paleoclimatology Research
- Geochemistry and Geologic Mapping
- Drilling and Well Engineering
- Geological Studies and Exploration
- Geological formations and processes
- earthquake and tectonic studies
- Paleontology and Stratigraphy of Fossils
- Geochemistry and Elemental Analysis
- Groundwater and Isotope Geochemistry
- CO2 Sequestration and Geologic Interactions
- Atmospheric and Environmental Gas Dynamics
- Hydraulic Fracturing and Reservoir Analysis
- Geological and Geophysical Studies
- Geological and Tectonic Studies in Latin America
- Marine and environmental studies
- Seismic Imaging and Inversion Techniques
- High-pressure geophysics and materials
- Mercury impact and mitigation studies
- Mine drainage and remediation techniques
- Isotope Analysis in Ecology
- Heavy metals in environment
University of California, Davis
2012-2024
Planetary Science Institute
2016-2024
University of Georgia
2000
San Francisco State University
2000
United States Geological Survey
1986-1997
Airborne International (Netherlands)
1988
University of Wisconsin–Madison
1984
Research Article| August 01, 1984 Massive sulfide deposits at 21°N, East Pacific Rise: Chemical composition, stable isotopes, and phase equilibria ROBERT A. ZIERENBERG; ZIERENBERG 1Department of Geology Geophysics, University Wisconsin, Madison, Wisconsin 53706 Search for other works by this author on: GSW Google Scholar WAYNE C. SHANKS, III; III JAMES L. BISCHOFF 2U.S. Geological Survey, Menlo Park, California 94025 Author Article Information Publisher: Society America First Online: 01 Jun...
Research Article| March 01, 2011 Origin of a rhyolite that intruded geothermal well while drilling at the Krafla volcano, Iceland Wilfred A. Elders; Elders * 1Department Earth Sciences, University California−Riverside, Riverside, California 92521, USA *E-mail: wilfred.elders@ucr.edu. Search for other works by this author on: GSW Google Scholar Guðmundur Ó Friðleifsson; Friðleifsson 2HS Orka hf, Brekkustigur 36, Reykjanebær IS 260, Robert Zierenberg; Zierenberg 3Department Geology,...
Abstract. The Iceland Deep Drilling Project research well RN-15/IDDP-2 at Reykjanes, Iceland, reached its target of supercritical conditions a depth 4.5 km in January 2017. After only 6 days heating, the measured bottom hole temperature was 426 °C, and fluid pressure 34 MPa. southern tip Reykjanes peninsula is landward extension Mid-Atlantic Ridge Iceland. unique among Icelandic geothermal systems that it recharged by seawater, which has critical point 406 °C 29.8 geologic setting...
Hydrothermal vent communities are distributed along mid-ocean spreading ridges as isolated patches. While distance is a key factor influencing connectivity among sites, habitat characteristics also critical. The Pescadero Basin (PB) and Alarcón Rise (AR) fields, recently discovered in the southern Gulf of California, bounded by previously known localities (e.g. Guaymas 21° N East Pacific Rise); yet, newly vents differ markedly substrata fluid attributes. Out 116 macrofaunal species observed...
Eruption of volcanic rocks at the midocean ridges is major mechanism by which heat lost from interior Earth. Approximately one-third removed spreading centers convective circulation seawater (1). The magnitude this loss requires that entire volume oceans circulates through in approximately 10 million years. Seawater interaction with near 400°C results substantial chemical flux and makes an important contribution to buffering composition some elements seawater. Cations (Mg+2, Ca+2, Na+) form...
Bottled and packaged waters are an increasingly significant component of the human diet. These products regulated at regional, national, international levels, determining authenticity marketing labeling claims represents a challenge to regulatory agencies. Here, we present dataset stable isotope ratios for bottled sampled worldwide, consider potential applications such data regulatory, forensic geochemical standardization applications. The hydrogen oxygen 234 samples water range from -147...
Submersible exploration of the Samoan hotspot revealed a new, 300-m-tall, volcanic cone, named Nafanua, in summit crater Vailulu'u seamount. Nafanua grew from 1,000-m-deep floor <4 years and could reach sea surface within decades. Vents fill with thick suspension particulates apparently toxic fluids that mix seawater entering breaches. Low-temperature vents form Fe oxide chimneys many locations up to 1-m-thick layers hydrothermal floc on Nafanua. High-temperature (81 degrees C) northern moat...
Finely laminated and undisturbed except in the area of southwest basin; this part, bedding, resedimentation, brecciation are common. In addition, some sediment cores contain vein minerals precipitated open fissures which crosscut unlithified metalliferous sediments. These veins conduits by new hot brine vents into Deep. Vein mineralogy is dominated anhydrite, talc, smectite, pyrite, sphalerite, chalcopyrite. Vertical zonation due to cooling reaction incoming as it rises through sediment....
Abstract Hydrothermal vent fields located in the gap between known sites Guaymas Basin and 21°N on East Pacific Rise were discovered Alarcón southern Pescadero Basin. The spreading segment was mapped at 1‐m resolution by an autonomous underwater vehicle. Individual chimneys identified using bathymetric data. Vent interpreted as active from temperature anomalies water column data observed sampled during remotely operated vehicle dives. Ja Sít, Pericú, Meyibó are near eruptive fissure of...
Submarine hydrothermal systems are hypothesized to be a potentially important source of monomethylmercury (MMHg) the ocean, yet amount MMHg in vent fluids is unknown. Here, we report total Hg and concentrations sampled from Sea Cliff site on Gorda Ridge. dominant species, levels enhanced slightly compared seawater. enriched deposits surrounding site, suggesting near‐field deposition fluid plumes, with rapid demethylation scavenging Hg(II) complexes. Assuming flux representative global...
Research Article| November 01, 2006 Acid-fog deposition at Kilauea volcano: A possible mechanism for the formation of siliceous-sulfate rock coatings on Mars Peter Schiffman; Schiffman 1Department Geology, University California–Davis, 1 Shields Avenue, Davis, 95616 California, USA Search other works by this author on: GSW Google Scholar Robert Zierenberg; Zierenberg Naomi Marks; Marks Janice L. Bishop; Bishop 2The SETI Institute/NASA-Ames Center, 515 N. Whisman Rd., Mountain View, M. Darby...
The Turner‐Albright sulfide deposit, part of the Josephine ophiolite, formed on and below seafloor during Late Jurassic volcanism at a back arc spreading center. Ore fluids were probably localized by faults which active time deposition. uppermost massive hydrothermal vents, similar to sulfide‐depositing hot springs modern centers. bulk mineralization within olivine basalt hyaloclastite erupted near mineralization. Infiltration fluid into hyalo‐clastite altered rock quartz + Fe‐chlorite...
Abstract Meter‐scale AUV bathymetric mapping and ROV sampling of the entire 47 km‐long Alarcon Rise between Pescadero Tamayo transforms show that shallowest inflated portion segment hosts all four active hydrothermal vent fields youngest, hottest, highest effusion rate lava flows. This part is located ∼1/3 way paved by a 16 km 2 channelized flow erupted from 9 en echelon fissures larger than historic flows on East Pacific or Gorda Juan de Fuca Ridges. Starting ∼5 south transform, 6.5...