Methane-hydrogen gas seeps, Zambales Ophiolite, Philippines: Deep or shallow origin?

Abrajano, T.A.; Sturchio, Neil C.; Böhlke, John K.; Lyon, G. L.; Poreda, Robert J.; Stevens, C. M.

doi:10.1016/0009-2541(88)90116-7

Cited by 284 publications

(186 citation statements)

References 38 publications

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“…Thereiore, it is suspected that the metal alloys found in ophiolites are associated with magnetite during the serpentinization (Abrajano et al, 1988). Several lines of observation (Charlou and Donval, 1993;Berndt et al, 1996) also relate the emission of hydrogen and/or methane gas from ultramafic complexes, to the serpentinization, using the same rationale as above.…”

Section: Serpentinizationmentioning

confidence: 90%

Petrological and geochemical studies of an abyssal periodotite from the Atlantis II fracture zone

Lee¹

1997

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Section: Serpentinizationmentioning

confidence: 90%

Petrological and geochemical studies of an abyssal periodotite from the Atlantis II fracture zone

Lee¹

1997

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“…Gas shows have been observed in many ophiolitic ultramafic rocks (Neal & Stanger 1983, Lyon et al 1990, Abrajano et al 1988. However, hydrogen is not always the main gas present; methane, nitrogen and helium contents are often high but the former two can have biogenic origins and the latter is not necessarily of mantle origin.…”

Section: Prospectivity Of Ophiolitic Ultramafic Rocksmentioning

confidence: 98%

“…The Ronda, Spain values are from Kern & Tubia (1993) and the west USA values from Christensen (1978). Abiogenic gas field possibly extends to about -20‰ (heavy line) and includes Zambales gas seep (Abrajano et al 1988), gas from East Pacific Rise at 21 o N (Welhan & Craig 1979) and Tatar borehole gas (Vovk 1987 …”

Section: Rockall Troughmentioning

confidence: 99%

“…What are the prospects of discovering hydrogen? Shows of hydrogen exist at the surface and in mines in some parts of the world (Headlee 1962, Neal & Stanger 1983, Abrajano et al 1988, Lyon et al 1990, Smith 2002, but the key question is how much more might lie in the subsurface and in different places. Only the superdeep (Russian) and Gravberg (Swedish) boreholes could be considered tests, so far, and these were not specifically targeted on hydrogen.…”

Section: Introductionmentioning

confidence: 99%

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Hydrogen exploration: a review of global hydrogen accumulations and implications for prospective areas in NW Europe

Smith

Shepherd

Styles

et al. 2005

PGC

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From a geological perspective, hydrogen has been neglected. It is not as common as biogenic or thermogenic methane, which are ubiquitous in hydrocarbon basins, or carbon dioxide, which is common in geologically-active areas of the world. Nevertheless, small flows of hydrogen naturally reach the Earth's surface, occur in some metal mines and emerge beneath the oceans in a number of places worldwide. These occurrences of hydrogen are associated with abiogenic and biogenic methane, Further research should aim to identify the extent of the hydrogen flux and its probable dominant role in the abiogenic production of hydrocarbons in Precambrian times, a natural process now largely replaced by biogenic participation. A similar industrial process replicates serpentinization, producing hydrogen and ultimately liquid hydrocarbons on a commercial scale in some countries. It remains to be proved whether a contribution from exploration can be made to any future Hydrogen Economy.

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“…Generally, biogenic-origin gases show a normal pattern of carbon isotopic values for methane and their molecular homologues (i.e., 13 C 1 < 13 C 2 < 13 C 3 < 13 C n ; Chung et al, 1988;Prinzhofer and Huc, 1995). However, abiogenic methane is frequently found in certain regimes such as oceanic mid-ridges, mud volcanoes and areas adjacent to abyssal fault zones (Abrajano et al, 1988;Charlou et al, 2002;Hosgormez et al, 2005). These abiogenic natural gases generally show a reversal pattern of carbon isotopic values for methane and their molecular homologues (i.e., 13 C 1 > 13 C 2 > 13 C 3 > 13 C 4 , Des Marais et al, 1981;Jenden et al, 1993a;Dai et al, 2005;Sherwood Lollar et al, 2002;2008).…”

Section: Introductionmentioning

confidence: 99%

Fischer–Tropsch Synthesis Conducted in Volcanic Reservoir Stone, An Important Factor Caused a Reversed Pattern of Carbon Isotopic for Natural Gases Developed in Deep Layers, Songliao Basin North East China

Zhang

et al. 2013

Energy Exploration & Exploitation

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AbstractsTwo types of experiments of source rocks pyrolysis with volcanic reservoir rock and without one were conducted under hydrothermal condition and at 200 ˚C in gold tube system. The experiments result shows that there is a higher concentration of hydrocarbon gases generated in the experiment with rhyolite of reservoir stone and water than that with only water. Moreover, the hydrocarbon gases generated by experiments with rhyolite show a full reserved pattern of carbon isotope. This indicated that the FST reaction could happened between source rocks and volcanic reservoir rock at relatively low temperature.The numerical calculation for the carbon isotope of the gases from mixture between the gases from our FTS experiments and the typical organic hydrocarbon gases from deep layers of Songliao basin show that the contamination of a little FTS gas (<5% ,v/v) could cause the carbon isotope composition of thermal gases great variation. So, Fischer-Tropsch synthesis conducted in volcanic reservoir stone is an un-negligible factor caused the reversed pattern of carbon isotopic for natural gases developed in deep layers, Songliao Basin. This also indicated that the natural gases in deep layers of the basin are organic origin chiefly.

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Methane-hydrogen gas seeps, Zambales Ophiolite, Philippines: Deep or shallow origin?

Cited by 284 publications

References 38 publications

Petrological and geochemical studies of an abyssal periodotite from the Atlantis II fracture zone

Petrological and geochemical studies of an abyssal periodotite from the Atlantis II fracture zone

Hydrogen exploration: a review of global hydrogen accumulations and implications for prospective areas in NW Europe

Fischer–Tropsch Synthesis Conducted in Volcanic Reservoir Stone, An Important Factor Caused a Reversed Pattern of Carbon Isotopic for Natural Gases Developed in Deep Layers, Songliao Basin North East China

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