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Generation, Accumulation, and Resource Potential of Biogenic Gas
Biogenic gas is generated at low temperatures by decomposition of organic matter by anaerobic microorganisms. More than 20% of the world's discovered gas reserves are of biogenic origin. A higherExpand
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Methane and other Hydrocarbon Gases in Marine Sediment
Hydrocarbon gases are common in marine sediment accumulating in present-day oceans. Such gases originate from the decomposition of organic matter by biochemical and chemical processes. We considerExpand
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Gas hydrate systems at Hydrate Ridge offshore Oregon inferred from molecular and isotopic properties of hydrate-bound and void gases
Abstract We report and discuss molecular and isotopic properties of hydrate-bound gases from 55 samples and void gases from 494 samples collected during Ocean Drilling Program (ODP) Leg 204 atExpand
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Modeling thermogenic gas generation using carbon isotope ratios of natural gas hydrocarbons
An isotopic model to predict δ13C values for methane (C1), ethane (C2), and propane (C3) as a function of fractional conversion of kerogen and/or oil to gas is proposed for gas generation from TypeExpand
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Anomalous 13C enrichment in modern marine organic carbon
Marine organic carbon is heavier isotopically (13C enriched) than most land-plant or terrestrial organic C1. Accordingly, δ13C values of organic C in modern marine sediments are routinely interpretedExpand
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Three-dimensional distribution of gas hydrate beneath southern Hydrate Ridge: Constraints from ODP Leg 204
Large uncertainties about the energy resource potential and role in global climate change of gas hydrates result from uncertainty about how much hydrate is contained in marine sediments. During LegExpand
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Co-existence of gas hydrate, free gas, and brine within the regional gas hydrate stability zone at Hydrate Ridge (Oregon margin): evidence from prolonged degassing of a pressurized core
Standard scientific operations on Ocean Drilling Program (ODP) Leg 204 documented a horizon of massive gas hydrate and highly saline pore water ∼0–20 m below the southern summit of Hydrate RidgeExpand
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In situ methane concentrations at Hydrate Ridge, offshore Oregon: New constraints on the global gas hydrate inventory from an active margin
The widespread presence of bottom-simulating reflectors (BSRs) on continental margins has bolstered suggestions that gas hydrates and free gas constitute a large dynamic reservoir of CH4 carbon and aExpand
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Geochemical constraints on the origin of the pore fluids and gas hydrate distribution at Atwater Valley and Keathley Canyon, northern Gulf of Mexico
Abstract Pore fluids from Atwater Valley (AT 13/14) and Keathley Canyon (KC 151) in the northern Gulf of Mexico are surprisingly similar with respect to ionic concentrations and oxygen and strontiumExpand
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