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abiotic gas

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Journal Article
Journal: Elements
Published: 01 August 2014
Elements (2014) 10 (4): 291-296.
...Giuseppe Etiope; Martin Schoell Abstract Abiotic gaseous hydrocarbons comprise a fascinating, but poorly understood, group of Earth fluids generated by magmatic and gas–water–rock reactions that do not directly involve organic matter. At least nine different inorganic mechanisms, including Fischer...
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Journal Article
Journal: Geology
Published: 01 May 2015
Geology (2015) 43 (5): 371-374.
... oceans. In nascent, ultraslow-spreading ocean basins, methane generation can also be abiotic, occurring during the high-temperature (>200 °C) serpentinization of ultramafic rocks. Here, we report on the evolution of a growing Arctic gas- and gas hydrate–charged sediment drift on oceanic crust...
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Journal Article
Published: 01 February 2001
Geochemistry: Exploration, Environment, Analysis (2001) 1 (1): 81-88.
...Brian A. Dempsey; Heath C. Roscoe; Ryan Ames; Robert Hedin; Byong-Hun Jeon Abstract The rates of chemical oxidation and gas transfer were determined for two passive abiotic systems for the treatment of mine drainage. One system (HB) is a series of ponds whose discharge was net acidic. The second...
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Journal Article
Published: 01 January 2013
Reviews in Mineralogy and Geochemistry (2013) 75 (1): 467-494.
...Thomas M. McCollom Conceptually, there are two potential major sources of abiotic hydrocarbons to fluids in Earth’s crust. First, abiotic hydrocarbons could migrate to the crust from deeper sources within Earth, through processes such as convective transport, grain boundary diffusion, or release...
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Journal Article
Published: 01 August 2014
Mineralogical Magazine (2014) 78 (4): 941-955.
...B. E. van Dongen; N. J. Ashton; R. A. D. Pattrick Abstract Ferromanganese nodules have been recognized widely as potentially important resources for strategic metals. However it remains unclear if the formation of these nodules is purely an abiotic process or if microorganisms are involved...
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Journal Article
Journal: PALAIOS
Published: 01 March 2017
PALAIOS (2017) 32 (3): 125-134.
...NEIL S. DAVIES; ANTHONY P. SHILLITO; WILLIAM J. MCMAHON Abstract A wide variety of sub-ripple-scale sedimentary surface textures are known from bedding planes in the sedimentary rock record. Many of these textures were traditionally ascribed an abiotic origin (e.g., due to rain drop impact...
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Journal Article
Published: 01 October 2013
Journal of Sedimentary Research (2013) 83 (10): 896-914.
..., or, alternatively, as the result of purely abiotic precipitation. Close examination of this stratigraphically significant unit shows that it is the result of both physical and microbial processes, and was deposited in hypersaline shallow water immediately following lowstand evaporite deposition within the Zechstein...
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Journal Article
Journal: Geology
Published: 01 August 2001
Geology (2001) 29 (8): 699-702.
...Thomas D. Bullen; Arthur F. White; Cyril W. Childs; Davisson V. Vivit; Marjorie S. Schulz Abstract Field and laboratory studies reveal that the mineral ferrihydrite, formed as a result of abiotic oxidation of aqueous ferrous to ferric Fe, contains Fe that is isotopically heavy relative...
FIGURES
Series: Geological Society, London, Special Publications
Published: 01 January 2015
DOI: 10.1144/SP418.3
EISBN: 9781862397163
... or ceased, calcite growth, now less inhibited, produced shrub-like calcites resembling those produced abiotically in modern travertines, although still with some evidence of the former presence of some Mg-silicates. Physical reworking of these sediments led to the dispersion of the gels...
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Series: SEPM Special Publication
Published: 01 January 2003
DOI: 10.2110/pec.02.74.0123
EISBN: 9781565762114
... in the composition and spatial distribution of reef biota and in the mineralogy and stable- isotope composition of abiotic marine precipitates, and (2) the distribution of reservoir-grade porosity is strongly influenced by early-marine cementation, dolomitization, and meteoric-related diagenetic processes...
Image
The geographic distribution of onshore <b>abiotic</b> or dominantly <b>abiotic</b> hydroc...
in > Elements
Published: 01 August 2014
F igure 2 The geographic distribution of onshore abiotic or dominantly abiotic hydrocarbons, where methane is a major gas species. CO 2 -rich volcanic or geothermal sources, with minor amounts of CH 4 , are not shown. The locations of surface seeps, including abiotic and biotic (thermogenic
Series: SEPM Special Publication
Published: 01 January 2000
EISBN: 9781565761896
... produced by diffusion-limited aggregation in an abiotic precipitation experiment ( Matsushita et al. 1985) . The dendritic structures are qualitatively simitar to the Hearne dendritically branching tufa. The width of the Fig. is ~5 cm. Fig. 12. —Model showing growth of dendritically...
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Series: Geological Society, London, Special Publications
Published: 01 January 2013
DOI: 10.1144/SP376.19
EISBN: 9781862396449
... as well as modern reefs, the measurement of changes in the composition of reef biota is crucial in order to evaluate the influence of extrinsic factors on the marine communities. The dramatic abiotic changes in the eastern and northern Pangea was mirrored by a gradual transition from a photozoan...
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Series: Clay Minerals Society Workshop Lectures
Published: 01 January 2006
DOI: 10.1346/CMS-WLS-14.3
EISBN: 9781881208341
... and 30 mM bicarbonate) ( Liu et al., 2001a ). Goethite used in these experiments has specific surface area of 60 m 2 g -1 . Abstract The rates of abiotic mineral dissolution are commonly measured in batch or flow-through chemical reactors using established techniques and models. Interpretation...
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Journal Article
Published: 01 October 2011
Clays and Clay Minerals (2011) 59 (5): 525-537.
...Ming-Ming Liu; Xing-Hui Cao; Wen-Feng Tan; Xiong-Han Feng; Guo-Hong Qiu; Xiu-Hua Chen; Fan Liu Abstract The role of Mn oxide in the abiotic formation of humic substances has been well demonstrated. However, information on the effect of crystal structure and surface-chemical characteristics of Mn...
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Journal Article
Published: 01 April 2006
Clays and Clay Minerals (2006) 54 (2): 195-208.
...Kangwon Lee; Joel E. Kostka; Joseph W. Stucki Abstract The reduction of structural Fe in smectite is mediated either abiotically, by reaction with dithionite, or biotically, by Fe-reducing bacteria. The effects of abiotic reduction on clay-surface chemistry are much better known than the effects...
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Journal Article
Journal: Geology
Published: 01 July 2009
Geology (2009) 37 (7): 631-634.
... the macromolecular hydrocarbon structure, carbon bonding, functional group chemistry, and biotic element abundance of carbonaceous matter associated with these filamentous features. These characteristics are similar to those of biogenic kerogen from the ca. 1.9 Ga old Gunflint Formation. Although an abiotic origin...
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Journal Article
Published: 01 April 1997
Clays and Clay Minerals (1997) 45 (2): 274-285.
... of alteration. ("Dysoxic" refers to molecular oxygen concentration too low to be toxic to anaerobes or cause abiotic oxidation; less extreme than "anoxic".) Kaolins were produced partly by slower dysoxic weathering in saturated groundwater zones but mainly by more rapid oxic weathering in unsaturated zones...
Journal Article
Journal: AAPG Bulletin
Published: 01 May 2016
AAPG Bulletin (2016) 100 (5): 843-865.
... on the chemical reaction between sulfate ions and petroleum components dissolved in aqueous solutions. This abiotic reduction reaction is defined as ASR in our study. Compared with ASR, the term TSR in our study refers to a web that couples petroleum–water–rock–gas reactions triggered by kinetically controlled...
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Series: Geological Society, London, Special Publications
Published: 01 January 2013
DOI: 10.1144/SP376.21
EISBN: 9781862396449
... high. In the context considered here, it must be stressed that very high VR r values found in the basinal zone (dark bituminous carbonate laminites) could generate gas. However, no gas deposits have been found within them and long migration pathways (tens to hundreds of kilometres), through...
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