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Abiogenic formation of alkanes in the Earth's crust as a minor source for global hydrocarbon reservoirs
Natural hydrocarbons are largely formed by the thermal decomposition of organic matter (thermogenesis) or by microbial processes (bacteriogenesis). But the discovery of methane at an East PacificExpand
Solubility trapping in formation water as dominant CO2 sink in natural gas fields
Injecting CO2 into deep geological strata is proposed as a safe and economically favourable means of storing CO2 captured from industrial point sources. It is difficult, however, to assess theExpand
Unravelling abiogenic and biogenic sources of methane in the Earth's deep subsurface
At four underground sites in Precambrian Shield rocks in Canada and South Africa, hydrocarbon and hydrogen gases exsolving from saline fracture waters are analyzed for compositional and isotopicExpand
Abiotic formation of hydrocarbons under hydrothermal conditions: Constraints from chemical and isotope data
To understand reaction pathways and isotope systematics during mineral-catalyzed abiotic synthesis of hydrocarbons under hydrothermal conditions, experiments involving magnetite and CO{sub 2} andExpand
Isotopic signatures of CH4 and higher hydrocarbon gases from Precambrian Shield sites: A model for abiogenic polymerization of hydrocarbons
Abstract Previous studies of methane and higher hydrocarbon gases in Precambrian Shield rocks in Canada and the Witwatersrand Basin of South Africa identified two major gas types. PaleometeoricExpand
Estimation of nuclear volume dependent fractionation of mercury isotopes
Abstract To confirm theoretical predictions of the isotopic signature of the nuclear volume effect (NVE) for Hg, liquid–vapor Hg isotope fractionation was investigated under equilibrium conditions inExpand
Carbon and hydrogen isotopic fractionation during biodegradation of methyl tert-butyl ether.
Carbon and hydrogen isotopic fractionation during aerobic biodegradation of MTBE by a bacterial pure culture (PM1) and a mixed consortia from Vandenberg Air Force Base (VAFB) were studied in order toExpand
The influence of carbon source on abiotic organic synthesis and carbon isotope fractionation under hydrothermal conditions
Abstract A series of laboratory experiments were performed to investigate the relative contributions of CO and other single-carbon compounds to abiotic synthesis of organic compounds in hydrothermalExpand
Hydrogeologic controls on episodic H2 release from precambrian fractured rocks--energy for deep subsurface life on earth and mars.
Dissolved H(2) concentrations up to the mM range and H(2) levels up to 9-58% by volume in the free gas phase are reported for groundwaters at sites in the Precambrian shields of Canada and Finland.Expand
Deep fracture fluids isolated in the crust since the Precambrian era
Fluids trapped as inclusions within minerals can be billions of years old and preserve a record of the fluid chemistry and environment at the time of mineralization. Aqueous fluids that have had aExpand