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Journal articleSephton MA, James RH, Bland PA, 2004,
Lithium isotope analyses of inorganic constituents from the Murchison meteorite
, ASTROPHYSICAL JOURNAL, Vol: 612, Pages: 588-591, ISSN: 0004-637X- Author Web Link
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- Citations: 14
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Journal articleVisscher H, Looy CV, Collinson ME, et al., 2004,
Environmental mutagenesis during the end-Permian ecological crisis
, PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA, Vol: 101, Pages: 12952-12956, ISSN: 0027-8424- Author Web Link
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- Citations: 194
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Conference paperHoward WM, Fried LE, Melius CF, et al., 2004,
Kinetics of formic acid at high pressure and temperature.
, 228th National Meeting of the American-Chemical-Society, Publisher: AMER CHEMICAL SOC, Pages: U277-U277, ISSN: 0065-7727 -
Journal articleSephton MA, Bland PA, Pillinger CT, et al., 2004,
The preservation state of organic matter in meteorites from Antarctica
, METEORITICS & PLANETARY SCIENCE, Vol: 39, Pages: 747-754, ISSN: 1086-9379- Author Web Link
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- Citations: 30
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Journal articleSephton MA, 2004,
Organic matter in ancient meteorites
, ASTRONOMY & GEOPHYSICS, Vol: 45, Pages: 8-14, ISSN: 1366-8781- Author Web Link
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- Citations: 21
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Conference paperZaug JM, Montgomery WB, Goncharov AF, et al., 2004,
FTIR studies of high-pressure formic acid reactions: Extreme chemistry decomposition kinetics.
, 227th National Meeting of the American-Chemical Society, Publisher: AMER CHEMICAL SOC, Pages: U1221-U1221, ISSN: 0065-7727 -
Journal articleSephton MA, Love GD, Watson JS, et al., 2004,
Hydropyrolysis of insoluble carbonaceous matter in the Murchison meteorite: New insights into its macromolecular structure
, GEOCHIMICA ET COSMOCHIMICA ACTA, Vol: 68, Pages: 1385-1393, ISSN: 0016-7037- Author Web Link
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- Citations: 103
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Journal articleButterworth AL, Aballain O, Chappellaz J, et al., 2004,
Combined element (H and C) stable isotope ratios of methane in carbonaceous chondrites
, MON NOT R ASTRON SOC, Vol: 347, Pages: 807-812, ISSN: 0035-8711We have performed the first ever combined-element stable isotopic measurements of extraterrestrial molecules. Methane from two carbonaceous chondrites, Murchison and Cold Bokkeveld, was measured for its hydrogen and carbon isotopic compositions. The combined isotopic composition of meteoritic methane reveals information about the indigenous nature of volatile aliphatic organic matter in meteorites and its probable extraterrestrial source environment. Deuterium enrichments relative to the solar nebula 4.6 Gyr ago reflect a contribution from low-temperature chemical reactions in interstellar space. Similar carbon but different hydrogen isotopic compositions for methane in the two meteorite samples probably represent comparable primary origins but varying levels of secondary processing and exchange with isotopically light hydrogen. Our high precision laboratory-obtained measurements provide valuable reference points for observational spectroscopists undertaking astronomical investigations of the stable isotopic composition of extraterrestrial methane.
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Journal articleBridges JC, Schwanethal JP, Pearson VK, et al., 2004,
A very public fireball
, Astronomy and Geophysics, Vol: 45, Pages: 625-626 -
Journal articleWatson JS, Pearson VK, Sephton MA, et al., 2004,
Molecular, isotopic and in-situ analytical approaches to the study of meteoritic organic material
, International Journal of Astrobiology, Vol: 3, Pages: 107-116, ISSN: 1473-5504 -
Journal articlePearson VK, Kearsley AT, Sephton MA, 2004,
The in-situ detection of organic material in extraterrestrial samples
, MICROS ANAL, Pages: 5-10, ISSN: 0958-1952 -
Journal articleSephton MA, Verchovksy AB, Wright IP, 2004,
Carbon and nitrogen isotope ratios in meteoritic organic matter; indicators of alteration processes on the parent asteroid
, INT J ASTROBIOL, Vol: 3, Pages: 221-228, ISSN: 1473-5504 -
BookGilmour I, Sephton MA, 2004,
An introduction to astrobiology
, Cambridge, Publisher: Cambridge University Press, ISBN: 9780521837361 -
Book chapterSephton MA, 2004,
Origin of Life
, An introduction to astrobiology, Editors: Gilmour, Sephton, Cambridge, Publisher: Cambridge University Press, Pages: 1-41, ISBN: 9780521837361 -
Journal articleButterworth AL, Aballain A, Chappellaz J, et al., 2004,
Combined element (H and C) stable isotope ratios of methane in carbonaceous chondrites
, MON NOT R ASTRON SOC, Vol: 347, Pages: 807-812, ISSN: 0035-8711 -
Book chapterSephton MA, 2004,
Compound specific isotope analysis of the organic constituents in meteorites
, Handbook of stable isotope analytical techniques, Editors: de Groot, London, Publisher: Elsevier, Pages: 229-236, ISBN: 9780444511140 -
Journal articleSephton MA, Verchovsky AB, Bland PA, et al., 2003,
Investigating the variations in carbon and nitrogen isotopes in carbonaceous chondrites
, GEOCHIMICA ET COSMOCHIMICA ACTA, Vol: 67, Pages: 2093-2108, ISSN: 0016-7037- Author Web Link
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- Citations: 118
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Journal articleWignall PB, Zonneveld JP, Sephton MA, 2003,
Carbon and nitrogen isotope disturbances and an end-Norian (Late Triassic) extinction event : comment and reply
, GEOLOGY, Vol: 7, Pages: e25-e25, ISSN: 0091-7613 -
Journal articleWatson JS, Pearson VK, Gilmour I, et al., 2003,
Contamination by sesquiterpenoid derivatives in the Orgueil carbonaceous chondrite
, ORGANIC GEOCHEMISTRY, Vol: 34, Pages: 37-47, ISSN: 0146-6380- Author Web Link
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- Citations: 16
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Journal articlePearson VK, Sephton MA, Kearsley AT, et al., 2002,
Clay mineral-organic matter relationships in the early solar system
, METEORITICS & PLANETARY SCIENCE, Vol: 37, Pages: 1829-1833, ISSN: 1086-9379- Author Web Link
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- Citations: 108
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