Publications
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Newly discovered Paleocene and Eocene rocks near Fairfield, California, and correlation with rocks in Vaca Valley and the so-called Martinez Formation or Stage
Discovery of a 3-foot thick sandstone bed with abundant Turritellid gastropods of late Paleocene age about 4 miles northeast of Fairfield and on the southwest flank of Cement Hill, Solano County provides an opportunity to reevaluate the relationships of lower Tertiary formations in this part of California. Cement Hill is named for travertine deposits in and on top of sandstone of Late Cretaceous a
Authors
Earl E. Brabb, Donn Ristau, David Bukry, Kristin McDougall, Alvin A. Almgren, LouElla Saul, Annika Sanfilippo
Experimental investigation on thermochemical sulfate reduction by H2S initiation
Hydrogen sulfide (H2S) is known to catalyze thermochemical sulfate reduction (TSR) by hydrocarbons (HC), but the reaction mechanism remains unclear. To understand the mechanism of this catalytic reaction, a series of isothermal gold-tube hydrous pyrolysis experiments were conducted at 330 °C for 24 h under a constant confining pressure of 24.1 MPa. The reactants used were saturated HC (sulfur-free
Authors
Tongwei Zhang, Alon Amrani, Geoffrey S Ellis, Qisheng Ma, Yongchun Tang, David Applegate
The role of labile sulfur compounds in thermal chemical sulfate reduction
The reduction of sulfate to sulfide coupled with the oxidation of hydrocarbons to carbon dioxide, commonly referred to as thermochemical sulfate reduction (TSR), is an important abiotic alteration process that most commonly occurs in hot carbonate petroleum reservoirs. In the present study we focus on the role that organic labile sulfur compounds play in increasing the rate of TSR. A series of gol
Authors
Alon Amrani, Geoffrey S Ellis, Tongwei Zhang, Qisheng Ma, Yongchun Tang
Theoretical study on the reactivity of sulfate species with hydrocarbons
The abiotic, thermochemically controlled reduction of sulfate to hydrogen sulfide coupled with the oxidation of hydrocarbons, is termed thermochemical sulfate reduction (TSR), and is an important alteration process that affects petroleum accumulations in nature. Although TSR is commonly observed in high-temperature carbonate reservoirs, it has proven difficult to simulate in the laboratory under c
Authors
Qisheng Ma, Geoffrey S Ellis, Alon Amrani, Tongwei Zhang, Yongchun Tang
Post-combustion CO2 capture: Let the microbes ruminate
No abstract available.
Authors
Gary D. Stricker, Romeo M. Flores, Margaret S. Ellis, Donald A. Klein
Hydrogeochemical investigation of the Standard Mine Vicinity, Upper Elk Creek Basin, Colorado
Ground- and surface-water samples were collected in the vicinity of the Standard Mine in west-central Colorado in order to characterize the local ground-water flow system, determine metal concentrations in local ground water, and better understand factors controlling the discharge of metal-rich waters from the mine. The sampling program included a one-time sampling of springs, mine adits, and expl
Authors
Andrew H. Manning, Philip L. Verplanck, M. Alisa Mast, Richard B. Wanty
A major unconformity between Permian and Triassic strata at Cape Kekurnoi, Alaska Peninsula: Old and new observations on stratigraphy and hydrocarbon potential
A major angular unconformity separates carbonates and shales of the Upper Triassic Kamishak Formation from an underlying unnamed sequence of Permian agglomerate, volcaniclastic rocks (sandstone), and limestone near Puale Bay on the Alaska Peninsula. For the first time, we photographically document the angular unconformity in outcrop, as clearly exposed in a seacliff ~1.3 mi (2.1 km) west of Cape K
Authors
Robert B. Blodgett, Bryan Sralla
Living in Yellowstone's Caldera: A geochemical trophic cascade in elk
Though the geology of earth's rare geothermal environments and their associated microbial communities are intensely studied, less scientific attention has focused on their potential effects through the plant-herbivore-carnivore trophic chain. The west-central portion of Yellowstone National Park contains a 2000-km2 volcanic caldera with 2- to 60-million-year-old, predominantly rhyolitic, rocks tha
Authors
Robert A. Garrott, P.J. White, James K. Otton, Maurice A. Chaffee
Areas of historical oil and gas exploration and production in the United States
This report contains maps and associated spatial data showing historical oil and gas exploration and production in the United States. Because of the proprietary nature of many oil and gas well databases, the United States was divided into cells one-quarter square mile and the production status of all wells in a given cell was aggregated. Base-map reference data are included, using the U.S. Geologi
Authors
Laura Biewick
Paleomagnetic study of late Miocene through Pleistocene igneous rocks from the southwestern USA: Results from the historic collections of the U.S. Geological Survey Menlo Park laboratory
Seventy sites from the southwestern United States provide paleomagnetic results that meet certain minimum criteria and can be considered for the Time‐Averaged Field Initiative (TAFI). The virtual geomagnetic poles for these 70 units are circularly distributed, and their mean is nearly coincident with the rotational axis. When other published data for the southwestern United States are included (N
Authors
Edward A. Mankinen
Database for Assessment Unit-Scale Analogs (Exclusive of the United States)
This publication presents a database of geologic analogs useful for the assessment of undiscovered oil and gas resources. Particularly in frontier areas, where few oil and gas fields have been discovered, assessment methods such as discovery process models may not be usable. In such cases, comparison of the assessment area to geologically similar but more maturely explored areas may be more approp
Authors
Ronald R. Charpentier, T. R. Klett, E. D. Attanasi