Thomas Lorenson
Physical Scientist with the USGS Pacific Coastal and Marine Science Center
Science and Products
Filter Total Items: 13
Geochemical analysis of seeps along the Queen Charlotte Fault
Geochemical analyses of authigenic carbonates, bivalves, and pore fluids were performed on samples collected from seep fields along the Queen Charlotte Fault, a right lateral transform boundary that separates the Pacific and North American tectonic plates. Samples were collected using grab samplers and piston cores, and were collected during three different research cruises in 2011, 2015, and 2017
Filter Total Items: 17
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 of hydrat
Authors
H. Lu, Thomas Lorenson, I.L. Moudrakovski, J.A. Ripmeester, Timothy S. Collett, R.B. Hunter, C.I. Ratcliffe
Data Report: Acetate and Hydrogen Concentrations in Pore Fluids Associated with a Large Gas Hydrate Reservoir, Southern Hydrate Ridge, offshore Oregon, USA
Acetate and hydrogen concentrations in pore fluids were measured in samples taken at seven sites from southern Hydrate Ridge (SHR) offshore Oregon, USA. Acetate concentrations ranged from 3.17 to 2515 µM. The maximum acetate concentrations occurred at Site 1251, which was drilled on a slope basin to the east of SHR at depths just above the bottom-simulating reflector (BSR) that marks the boundary
Authors
Thomas Lorenson, Frederick S. Colwell, M.E. Delwiche, Jennifer A. Dougherty
Attention turns to naturally occurring methane seepage
Methane is the most abundant organic compound in the Earth's atmosphere. As a powerful greenhouse gas, it has implications for global climate change. Sources of methane to the atmosphere are varied. Depending on the source, methane can contain either modern or ancient carbon. Methane exiting from swamps and wetlands contains modern carbon, whereas methane leaking from petroleum reservoirs contains
Authors
Keith A. Kvenvolden, Thomas Lorenson, W.S. Reeburgh
The global occurrence of natural gas hydrate
Natural gas hydrate occurs worldwide in oceanic sediment of continental and insular slopes and rises of active and passive margins, in deep-water sediment of inland lakes and seas, and in polar sediment on both continents and continental shelves. In aquatic sediment, where water depths exceed about 300 m and bottom water temperatures approach 0° C, gas hydrate is found at the seafloor to sediment
Authors
Keith A. Kvenvolden, Thomas Lorenson
The Beaufort Sea continental shelf as a seasonal source of atmospheric methane
Methane concentrations in the Beaufort Sea under the winter ice canopy offshore from northern Alaska are 3 to 28 times greater than they are in late summer when the ice is absent in a similar region offshore from northern Canada where methane is in approximate equilibrium with the atmosphere. These observations suggest that methane concentrates in the water under the sea‐ice cover during winter an
Authors
Keith A. Kvenvolden, Marvin D. Lilley, Thomas Lorenson, P. W. Barnes, E. McLaughlin
Science and Products
- Data
Filter Total Items: 13
Geochemical analysis of seeps along the Queen Charlotte Fault
Geochemical analyses of authigenic carbonates, bivalves, and pore fluids were performed on samples collected from seep fields along the Queen Charlotte Fault, a right lateral transform boundary that separates the Pacific and North American tectonic plates. Samples were collected using grab samplers and piston cores, and were collected during three different research cruises in 2011, 2015, and 2017 - Publications
Filter Total Items: 17
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 of hydratAuthorsH. Lu, Thomas Lorenson, I.L. Moudrakovski, J.A. Ripmeester, Timothy S. Collett, R.B. Hunter, C.I. RatcliffeData Report: Acetate and Hydrogen Concentrations in Pore Fluids Associated with a Large Gas Hydrate Reservoir, Southern Hydrate Ridge, offshore Oregon, USA
Acetate and hydrogen concentrations in pore fluids were measured in samples taken at seven sites from southern Hydrate Ridge (SHR) offshore Oregon, USA. Acetate concentrations ranged from 3.17 to 2515 µM. The maximum acetate concentrations occurred at Site 1251, which was drilled on a slope basin to the east of SHR at depths just above the bottom-simulating reflector (BSR) that marks the boundaryAuthorsThomas Lorenson, Frederick S. Colwell, M.E. Delwiche, Jennifer A. DoughertyAttention turns to naturally occurring methane seepage
Methane is the most abundant organic compound in the Earth's atmosphere. As a powerful greenhouse gas, it has implications for global climate change. Sources of methane to the atmosphere are varied. Depending on the source, methane can contain either modern or ancient carbon. Methane exiting from swamps and wetlands contains modern carbon, whereas methane leaking from petroleum reservoirs containsAuthorsKeith A. Kvenvolden, Thomas Lorenson, W.S. ReeburghThe global occurrence of natural gas hydrate
Natural gas hydrate occurs worldwide in oceanic sediment of continental and insular slopes and rises of active and passive margins, in deep-water sediment of inland lakes and seas, and in polar sediment on both continents and continental shelves. In aquatic sediment, where water depths exceed about 300 m and bottom water temperatures approach 0° C, gas hydrate is found at the seafloor to sedimentAuthorsKeith A. Kvenvolden, Thomas LorensonThe Beaufort Sea continental shelf as a seasonal source of atmospheric methane
Methane concentrations in the Beaufort Sea under the winter ice canopy offshore from northern Alaska are 3 to 28 times greater than they are in late summer when the ice is absent in a similar region offshore from northern Canada where methane is in approximate equilibrium with the atmosphere. These observations suggest that methane concentrates in the water under the sea‐ice cover during winter anAuthorsKeith A. Kvenvolden, Marvin D. Lilley, Thomas Lorenson, P. W. Barnes, E. McLaughlin