Thomas Lorenson (Former Employee)
Science and Products
Filter Total Items: 14
No Result Found
Filter Total Items: 49
Macondo-1 well oil in sediment and tarballs from the northern Gulf of Mexico shoreline Macondo-1 well oil in sediment and tarballs from the northern Gulf of Mexico shoreline
From April 20 through July 15, 2010, an estimated 4.4 million barrels (1 barrel = 42 gallons [~700,000 cu m]) of crude oil spilled into the northern Gulf of Mexico (nGOM) from the ruptured British Petroleum (BP) Macondo-1 (M-1) well after the explosion of the drilling platform Deepwater Horizon. In addition, ~1.84 million gallons (~7,000 cu m) of hydrocarbon-based Corexit dispersants...
Authors
Florence L. Wong, Robert J. Rosenbauer, Pamela L. Campbell, Angela Lam, T.D. Lorenson, Frances D. Hostettler, Burt Thomas
Petroleum hydrocarbons in sediment from the northern Gulf of Mexico shoreline, Texas to Florida Petroleum hydrocarbons in sediment from the northern Gulf of Mexico shoreline, Texas to Florida
Petroleum hydrocarbons were extracted and analyzed from shoreline sediment collected from the northern Gulf of Mexico (nGOM) coastline that could potentially be impacted by Macondo-1 (M-1) well oil. Sediment was collected before M-1 well oil made significant local landfall and analyzed for baseline conditions by a suite of diagnostic petroleum biomarkers. Oil residue in trace quantities...
Authors
Robert J. Rosenbauer, Pamela L. Campbell, Angela Lam, T.D. Lorenson, Frances D. Hostettler, Burt Thomas, Florence L. Wong
Gas hydrate characterization and grain-scale imaging of recovered cores from the Mount Elbert Gas Hydrate Stratigraphic Test Well, Alaska North Slope Gas hydrate characterization and grain-scale imaging of recovered cores from the Mount Elbert Gas Hydrate Stratigraphic Test Well, Alaska North Slope
Using cryogenic scanning electron microscopy (CSEM), powder X-ray diffraction, and gas chromatography methods, we investigated the physical states, grain characteristics, gas composition, and methane isotopic composition of two gas-hydrate-bearing sections of core recovered from the BPXA–DOE–USGS Mount Elbert Gas Hydrate Stratigraphic Test Well situated on the Alaska North Slope. The...
Authors
Laura A. Stern, T.D. Lorenson, John C. Pinkston
The characteristics of gas hydrates recovered from the Mount Elbert Gas Hydrate Stratigraphic Test Well, Alaska North Slope The characteristics of gas hydrates recovered from the Mount Elbert Gas Hydrate Stratigraphic Test Well, Alaska North Slope
Systematic analyses have been carried out on two gas hydrate-bearing sediment core samples, HYPV4, which was preserved by CH4 gas pressurization, and HYLN7, which was preserved in liquid-nitrogen, recovered from the BPXA-DOE-USGS Mount Elbert Stratigraphic Test Well. Gas hydrate in the studied core samples was found by observation to have developed in sediment pores, and the distribution...
Authors
H. Lu, Thomas Lorenson, I.L. Moudrakovski, J.A. Ripmeester, Timothy S. Collett, R.B. Hunter, C.I. Ratcliffe
Biomarker chemistry and flux quantification methods for natural petroleum seeps and produced oils, offshore southern California Biomarker chemistry and flux quantification methods for natural petroleum seeps and produced oils, offshore southern California
Sustained, natural oil seepage from the seafloor is common off southern California, and is of great interest to resource managers, who are tasked with distinguishing natural from anthropogenic oil sources. The major purpose of this study was to build upon the work previously funded by the Bureau of Ocean Energy Management (BOEM) and the U.S. Geological Survey (USGS) that has refined the...
Authors
T.D. Lorenson, Ira Leifer, Florence L. Wong, Robert J. Rosenbauer, Pamela L. Campbell, Angela Lam, Frances D. Hostettler, Jens Greinert, David P. Finlayson, Eliza S. Bradley, Bruce P. Luyendyk
Gas hydrate prospecting using well cuttings and mud-gas geochemistry from 35 wells, North Slope, Alaska Gas hydrate prospecting using well cuttings and mud-gas geochemistry from 35 wells, North Slope, Alaska
Gas hydrate deposits are common on the North Slope of Alaska around Prudhoe Bay; however, the extent of these deposits is unknown outside of this area. As part of a U.S. Geological Survey (USGS) and Bureau of Land Management gas hydrate research collaboration, well-cutting and mud-gas samples have been collected and analyzed from mainly industry-drilled wells on the North Slope for the...
Authors
T.D. Lorenson, Timothy S. Collett
Reconnaissance of Macondo-1 well oil in sediment and tarballs from the northern Gulf of Mexico shoreline, Texas to Florida Reconnaissance of Macondo-1 well oil in sediment and tarballs from the northern Gulf of Mexico shoreline, Texas to Florida
Hydrocarbons were extracted and analyzed from sediment and tarballs collected from the northern Gulf of Mexico (nGOM) coast that is potentially impacted by Macondo-1 (M-1) well oil. The samples were analyzed for a suite of diagnostic geochemical biomarkers. Aided by multivariate statistical analysis, the M-1 well oil has been identified in sediment and tarballs collected from Louisiana...
Authors
Robert J. Rosenbauer, Pamela L. Campbell, Angela Lam, T.D. Lorenson, Frances D. Hostettler, Burt Thomas, Florence L. Wong
Late Pleistocene to Holocene sedimentation and hydrocarbon seeps on the continental shelf of a steep, tectonically active margin, southern California, USA Late Pleistocene to Holocene sedimentation and hydrocarbon seeps on the continental shelf of a steep, tectonically active margin, southern California, USA
Small, steep, uplifting coastal watersheds are prolific sediment producers that contribute significantly to the global marine sediment budget. This study illustrates how sedimentation evolves in one such system where the continental shelf is largely sediment-starved, with most terrestrial sediment bypassing the shelf in favor of deposition in deeper basins. The Santa Barbara-Ventura...
Authors
Amy E. Draut, Patrick E. Hart, T.D. Lorenson, Holly F. Ryan, Florence L. Wong, Ray W. Sliter, James E. Conrad
Natural offshore oil seepage and related tarball accumulation on the California coastline — Santa Barbara Channel and the southern Santa Maria Basin; source identification and inventory Natural offshore oil seepage and related tarball accumulation on the California coastline — Santa Barbara Channel and the southern Santa Maria Basin; source identification and inventory
Oil spillage from natural sources is very common in the waters of southern California. Active oil extraction and shipping is occurring concurrently within the region and it is of great interest to resource managers to be able to distinguish between natural seepage and anthropogenic oil spillage. The major goal of this study was to establish the geologic setting, sources, and ultimate...
Authors
T.D. Lorenson, Frances D. Hostettler, Robert J. Rosenbauer, Kenneth E. Peters, Jennifer A. Dougherty, Keith A. Kvenvolden, Christina E. Gutmacher, Florence L. Wong, William R. Normark
Sensitivity of the carbon cycle in the Arctic to climate change Sensitivity of the carbon cycle in the Arctic to climate change
The recent warming in the Arctic is affecting a broad spectrum of physical, ecological, and human/cultural systems that may be irreversible on century time scales and have the potential to cause rapid changes in the earth system. The response of the carbon cycle of the Arctic to changes in climate is a major issue of global concern, yet there has not been a comprehensive review of the...
Authors
A. David McGuire, Leif G. Anderson, Torben R. Christensen, Scott Dallimore, Laodong Guo, Daniel J. Hayes, Martin Heimann, T.D. Lorenson, Robie W. Macdonald, Nigel Roulet
Comments on potential geologic and seismic hazards affecting proposed liquefied natural gas site in Santa Monica Bay, California Comments on potential geologic and seismic hazards affecting proposed liquefied natural gas site in Santa Monica Bay, California
In a letter to the U.S. Geological Survey (USGS) dated March 25, 2008, Representative Jane Harman (California 36th district) requested advice on geologic hazards that should be considered in the review of a proposed liquefied natural gas (LNG) facility off the California coast in Santa Monica Bay. In 2004, the USGS responded to a similar request from Representative Lois Capps, regarding...
Authors
Stephanie L. Ross, Homa J. Lee, Tom E. Parsons, Larry A. Beyer, David M. Boore, James E. Conrad, Brian D. Edwards, Michael A. Fisher, Arthur D. Frankel, Eric L. Geist, Kenneth W. Hudnut, Susan E. Hough, Robert E. Kayen, T.D. Lorenson, Nicolas Luco, Patricia A. McCrory, Mary McGann, Manuel Nathenson, Michael Nolan, Mark D. Petersen, Daniel J. Ponti, Charles L. Powell, Holly F. Ryan, John C. Tinsley, Chris J. Wills, Florence L. Wong, Jingping Xu
Reply to comments by Mastalerz, V. on "Shallow gasoff the Rhône prodelta, Gulf of Lions" Marine Geology 234 (215-231) Reply to comments by Mastalerz, V. on "Shallow gasoff the Rhône prodelta, Gulf of Lions" Marine Geology 234 (215-231)
We really appreciate the interest and comments regarding our manuscript. We hope we address all the lingering issues in this reply. This also gives us the opportunity of publishing an update on our dataset that will complete the original manuscript (see Table 1). We have followed the author pattern in our answers: 1-Gas sampling procedure, 2-Reported gas concentrations results, 3-General...
Authors
Ana Garcia-Garcia, Daniel L. Orange, T.D. Lorenson, Olivier Radakovitch, Tommaso Tesi, Stefano Miserocchi, Serge Berne, Patrick Friend, Chuck Nittrouer, Alain Normand
Science and Products
Filter Total Items: 14
No Result Found
Filter Total Items: 49
Macondo-1 well oil in sediment and tarballs from the northern Gulf of Mexico shoreline Macondo-1 well oil in sediment and tarballs from the northern Gulf of Mexico shoreline
From April 20 through July 15, 2010, an estimated 4.4 million barrels (1 barrel = 42 gallons [~700,000 cu m]) of crude oil spilled into the northern Gulf of Mexico (nGOM) from the ruptured British Petroleum (BP) Macondo-1 (M-1) well after the explosion of the drilling platform Deepwater Horizon. In addition, ~1.84 million gallons (~7,000 cu m) of hydrocarbon-based Corexit dispersants...
Authors
Florence L. Wong, Robert J. Rosenbauer, Pamela L. Campbell, Angela Lam, T.D. Lorenson, Frances D. Hostettler, Burt Thomas
Petroleum hydrocarbons in sediment from the northern Gulf of Mexico shoreline, Texas to Florida Petroleum hydrocarbons in sediment from the northern Gulf of Mexico shoreline, Texas to Florida
Petroleum hydrocarbons were extracted and analyzed from shoreline sediment collected from the northern Gulf of Mexico (nGOM) coastline that could potentially be impacted by Macondo-1 (M-1) well oil. Sediment was collected before M-1 well oil made significant local landfall and analyzed for baseline conditions by a suite of diagnostic petroleum biomarkers. Oil residue in trace quantities...
Authors
Robert J. Rosenbauer, Pamela L. Campbell, Angela Lam, T.D. Lorenson, Frances D. Hostettler, Burt Thomas, Florence L. Wong
Gas hydrate characterization and grain-scale imaging of recovered cores from the Mount Elbert Gas Hydrate Stratigraphic Test Well, Alaska North Slope Gas hydrate characterization and grain-scale imaging of recovered cores from the Mount Elbert Gas Hydrate Stratigraphic Test Well, Alaska North Slope
Using cryogenic scanning electron microscopy (CSEM), powder X-ray diffraction, and gas chromatography methods, we investigated the physical states, grain characteristics, gas composition, and methane isotopic composition of two gas-hydrate-bearing sections of core recovered from the BPXA–DOE–USGS Mount Elbert Gas Hydrate Stratigraphic Test Well situated on the Alaska North Slope. The...
Authors
Laura A. Stern, T.D. Lorenson, John C. Pinkston
The characteristics of gas hydrates recovered from the Mount Elbert Gas Hydrate Stratigraphic Test Well, Alaska North Slope The characteristics of gas hydrates recovered from the Mount Elbert Gas Hydrate Stratigraphic Test Well, Alaska North Slope
Systematic analyses have been carried out on two gas hydrate-bearing sediment core samples, HYPV4, which was preserved by CH4 gas pressurization, and HYLN7, which was preserved in liquid-nitrogen, recovered from the BPXA-DOE-USGS Mount Elbert Stratigraphic Test Well. Gas hydrate in the studied core samples was found by observation to have developed in sediment pores, and the distribution...
Authors
H. Lu, Thomas Lorenson, I.L. Moudrakovski, J.A. Ripmeester, Timothy S. Collett, R.B. Hunter, C.I. Ratcliffe
Biomarker chemistry and flux quantification methods for natural petroleum seeps and produced oils, offshore southern California Biomarker chemistry and flux quantification methods for natural petroleum seeps and produced oils, offshore southern California
Sustained, natural oil seepage from the seafloor is common off southern California, and is of great interest to resource managers, who are tasked with distinguishing natural from anthropogenic oil sources. The major purpose of this study was to build upon the work previously funded by the Bureau of Ocean Energy Management (BOEM) and the U.S. Geological Survey (USGS) that has refined the...
Authors
T.D. Lorenson, Ira Leifer, Florence L. Wong, Robert J. Rosenbauer, Pamela L. Campbell, Angela Lam, Frances D. Hostettler, Jens Greinert, David P. Finlayson, Eliza S. Bradley, Bruce P. Luyendyk
Gas hydrate prospecting using well cuttings and mud-gas geochemistry from 35 wells, North Slope, Alaska Gas hydrate prospecting using well cuttings and mud-gas geochemistry from 35 wells, North Slope, Alaska
Gas hydrate deposits are common on the North Slope of Alaska around Prudhoe Bay; however, the extent of these deposits is unknown outside of this area. As part of a U.S. Geological Survey (USGS) and Bureau of Land Management gas hydrate research collaboration, well-cutting and mud-gas samples have been collected and analyzed from mainly industry-drilled wells on the North Slope for the...
Authors
T.D. Lorenson, Timothy S. Collett
Reconnaissance of Macondo-1 well oil in sediment and tarballs from the northern Gulf of Mexico shoreline, Texas to Florida Reconnaissance of Macondo-1 well oil in sediment and tarballs from the northern Gulf of Mexico shoreline, Texas to Florida
Hydrocarbons were extracted and analyzed from sediment and tarballs collected from the northern Gulf of Mexico (nGOM) coast that is potentially impacted by Macondo-1 (M-1) well oil. The samples were analyzed for a suite of diagnostic geochemical biomarkers. Aided by multivariate statistical analysis, the M-1 well oil has been identified in sediment and tarballs collected from Louisiana...
Authors
Robert J. Rosenbauer, Pamela L. Campbell, Angela Lam, T.D. Lorenson, Frances D. Hostettler, Burt Thomas, Florence L. Wong
Late Pleistocene to Holocene sedimentation and hydrocarbon seeps on the continental shelf of a steep, tectonically active margin, southern California, USA Late Pleistocene to Holocene sedimentation and hydrocarbon seeps on the continental shelf of a steep, tectonically active margin, southern California, USA
Small, steep, uplifting coastal watersheds are prolific sediment producers that contribute significantly to the global marine sediment budget. This study illustrates how sedimentation evolves in one such system where the continental shelf is largely sediment-starved, with most terrestrial sediment bypassing the shelf in favor of deposition in deeper basins. The Santa Barbara-Ventura...
Authors
Amy E. Draut, Patrick E. Hart, T.D. Lorenson, Holly F. Ryan, Florence L. Wong, Ray W. Sliter, James E. Conrad
Natural offshore oil seepage and related tarball accumulation on the California coastline — Santa Barbara Channel and the southern Santa Maria Basin; source identification and inventory Natural offshore oil seepage and related tarball accumulation on the California coastline — Santa Barbara Channel and the southern Santa Maria Basin; source identification and inventory
Oil spillage from natural sources is very common in the waters of southern California. Active oil extraction and shipping is occurring concurrently within the region and it is of great interest to resource managers to be able to distinguish between natural seepage and anthropogenic oil spillage. The major goal of this study was to establish the geologic setting, sources, and ultimate...
Authors
T.D. Lorenson, Frances D. Hostettler, Robert J. Rosenbauer, Kenneth E. Peters, Jennifer A. Dougherty, Keith A. Kvenvolden, Christina E. Gutmacher, Florence L. Wong, William R. Normark
Sensitivity of the carbon cycle in the Arctic to climate change Sensitivity of the carbon cycle in the Arctic to climate change
The recent warming in the Arctic is affecting a broad spectrum of physical, ecological, and human/cultural systems that may be irreversible on century time scales and have the potential to cause rapid changes in the earth system. The response of the carbon cycle of the Arctic to changes in climate is a major issue of global concern, yet there has not been a comprehensive review of the...
Authors
A. David McGuire, Leif G. Anderson, Torben R. Christensen, Scott Dallimore, Laodong Guo, Daniel J. Hayes, Martin Heimann, T.D. Lorenson, Robie W. Macdonald, Nigel Roulet
Comments on potential geologic and seismic hazards affecting proposed liquefied natural gas site in Santa Monica Bay, California Comments on potential geologic and seismic hazards affecting proposed liquefied natural gas site in Santa Monica Bay, California
In a letter to the U.S. Geological Survey (USGS) dated March 25, 2008, Representative Jane Harman (California 36th district) requested advice on geologic hazards that should be considered in the review of a proposed liquefied natural gas (LNG) facility off the California coast in Santa Monica Bay. In 2004, the USGS responded to a similar request from Representative Lois Capps, regarding...
Authors
Stephanie L. Ross, Homa J. Lee, Tom E. Parsons, Larry A. Beyer, David M. Boore, James E. Conrad, Brian D. Edwards, Michael A. Fisher, Arthur D. Frankel, Eric L. Geist, Kenneth W. Hudnut, Susan E. Hough, Robert E. Kayen, T.D. Lorenson, Nicolas Luco, Patricia A. McCrory, Mary McGann, Manuel Nathenson, Michael Nolan, Mark D. Petersen, Daniel J. Ponti, Charles L. Powell, Holly F. Ryan, John C. Tinsley, Chris J. Wills, Florence L. Wong, Jingping Xu
Reply to comments by Mastalerz, V. on "Shallow gasoff the Rhône prodelta, Gulf of Lions" Marine Geology 234 (215-231) Reply to comments by Mastalerz, V. on "Shallow gasoff the Rhône prodelta, Gulf of Lions" Marine Geology 234 (215-231)
We really appreciate the interest and comments regarding our manuscript. We hope we address all the lingering issues in this reply. This also gives us the opportunity of publishing an update on our dataset that will complete the original manuscript (see Table 1). We have followed the author pattern in our answers: 1-Gas sampling procedure, 2-Reported gas concentrations results, 3-General...
Authors
Ana Garcia-Garcia, Daniel L. Orange, T.D. Lorenson, Olivier Radakovitch, Tommaso Tesi, Stefano Miserocchi, Serge Berne, Patrick Friend, Chuck Nittrouer, Alain Normand