Siegert, M.J., Behar, A., Bentley, M., Blake, D., Christoffersen, P., Cockell, C., ...
Antarctic subglacial lakes have, over the past few years, been hypothesised to house unique forms of life and hold detailed sedimentary records of past climate change. Testing this hypothesis...
The labelling of meteoritic organic material using osmium tetroxide vapour impregnation (2007)
Pearson, V. K., Kearlsey, A. T., Sephton, M. A., Gilmour, I.
We present a method for labelling and locating organic material in extraterrestrial samples in order to determine its spatial arrangement in relation to inorganic components. We have taken a suite of...
The labelling of meteoritic organic material using osmium tetroxide vapour impregnation (2007)
Pearson, Victoria, Kearlsey, A. T., Sephton, M. A., Gilmour, Iain
We present a method for labelling and locating organic material in extraterrestrial samples in order to determine its spatial arrangement in relation to inorganic components. We have taken a suite of...
Pearson, Victoria, Sephton, M.A., Franchi, Ian, Gibson, Jennifer, Gilmour, Iain
We have undertaken a comprehensive study of carbon and nitrogen elemental abundances and isotopic compositions of bulk carbonaceous chondrites. A strategy of multiple analyses has enabled the...
Free dicarboxylic and aromatic acids in the carbonaceous chondrites Murchison and Orgueil (2006)
Martins, Z., Watson, J.S., Sephton, M.A., Botta, O., Ehrenfreund, P., Gilmour, I.
We have analyzed an important fraction of the free carboxylic acids present in water extracts of the CM2 chondrite Murchison and the Cl I chondrite Orgueil using gas chromatography-mass spectrometry...
Isotopic analysis of nucleobases in the Murchison meteorite (2006)
Martins, Z., Botta, O., Fogel, M. L., Sephton, M. A., Glavin, D. P., Watson, J. S., ...
Macromolecular organic acids in the Murchison meteorite (2005)
Watson, J. S., Sephton, M. A., Gilmour, I.
This study has detected bound organic acids within the Murchison meteorite organic macromolecule. Benzoic acid was the most abundant compound; other abundant compounds include C1 and C2 benzoic...
Court, R. W., Sephton, M. A., Parnell, J., Gilmour, I.
Exposure to ionizing radiation causes the mean combustion temperature of naturally occurring, solid, terrestrial organic matter, derived from the radiation-induced polymerization of methane, to...
Court, R. W., Sephton, M. A., Parnell, J., Gilmour, I.
Exposure to ionizing radiation causes the mean combustion temperature of naturally occurring, solid, terrestrial organic matter, derived from the radiation-induced polymerization of methane, to...
Sephton, M. A., Verchovsky, Sasha, Wright, Ian
Macromolecular organic materials in chondrites display significant variations in carbon and nitrogen stable isotopes. In recent years, these variations have been interpreted as a record of aqueous...
The preservation state of organic matter in meteorites from Antarctica (2004)
Sephton, M.A., Bland, P.A., Pillinger, C.T., Gilmour, I.
The recovery of large numbers of meteorites from Antarctica has dramatically increased the amount of extraterrestrial material available for laboratory studies of solar system origin and evolution....
Sephton, M.A., Love, G.D., Watson, J.S., Verchovsky, A.B., Wright, I.P., Snape, C.E., ...
The major organic component of carbonaceous chondrites is a solvent-insoluble, high molecular weight macromolecular material that constitutes at least 70% of the total organic content in these...
Investigating the variations in carbon and nitrogen isotopes in carbonaceous chondrites (2003)
Sephton, M.A., Verchovsky, A.B., Bland, P.A., Gilmour, I., Grady, M.M., Wright, I.P.
The carbonaceous chondrites contain significant amounts of carbon- and nitrogen-bearing components, the most abundant of which is organic matter. Stepped combustion data of whole rock and HF/HCl...
Hydropyrolysis of high molecular weight organic matter in Murchison (2003)
Sephton, M. A., Love, G. D., Watson, J. S., Verchovsky, A. B., Wright, I. P., Snape, C. E., ...
Hydropyrolysis of the Murchison macromolecular material releases polyaromatic compounds including phenanthrene, carbazole, fluoranthene, pyrene, chrysene, perylene, benzoperylene and coronene units...
Gilmour, Iain, Sephton, M. A., Morgan, J. V.
The organic geochemistry of hydrocarbon-rich core material recovered by the CSDP is examined to establish whether hydrocarbons are associated with the migration and emplacement of organic matter by...
High molecular weight organic matter in martian meteorites (2002)
Sephton, M.A., Wright, I.P., Gilmour, I., De Leeuw, J.W., Grady, M.M., Pillinger, C.T.
We have performed an investigation to detect high molecular weight organic matter in martian meteorites. Solvent-extracted samples of two Antarctic finds (ALH 84001, sub-sample 106 and EET A79001,...
Verchovsky, A.B., Sephton, M.A., Wright, I.P., Pillinger, C.T.
The exact location of planetary noble gases in meteorites remains unknown but it is inferred to be closely associated with, if not precisely some portion of, the macromolecular organic material in...
Gilmour, I., Hill, H. G. M., Pearson, V.K., Sephton, M.A, Nuth, J. A.
The high molecular weight organic products of Fischer-Tropsch/Haber-Bosch syntheses on the surfaces of Fe-silicate catalysts have been studied by GCMS.
Organic-inorganic spatial relationships in carbonaceous chondrites (2002)
Pearson, V. J., Kearsley, A. T., Sephton, M. A., Gilmour, I.
The use of a novel technique to determine the spatial relationships of organic and aqueously produced inorganic phases in carbonaceous chondrites, in order to support proposals of a genetic link...
Organic indicators of alteration in the CR chondrites (2002)
Pearson, V. K., Sephton, M. A., Gilmour, I.
A study of the organic components in the CR chondrite macromolecule in order to assess the role of pre-terrestrial alteration on the organic inventory.
Search for Q: single grains Xe isotope analysis of carbonaceous residue from Yilmia (2002)
Verchovsky, A. B., Gilmour, J. D., Holland, G., Sephton, M. A., Wright, I. P., Franchi, I. A.
We analyse Xe in single grains in HF-HCl residue from Yilmia using RELAX mass spectrometer.
Hydropyrolysis of the organic macromolecular material in the Murchison meteorite (2002)
Watson, J. S., Sephton, M. A., Love, G. D., Verchovsky, A. B., Snape, C. E., Gilmour, I.
Compound-specific isotope analysis of the organic constituents in carbonaceous chondrites (2001)
The carbonaceous chondrite meteorites contain evidence of the formation of the solar system, part of which is present within organic matter. In recent years, compound-specific isotope analysis (CSIA)...
Sephton, M.A., Pillinger, C.T., Gilmour, I.
In the time period since 1961, n-alkanes (straight-chain hydrocarbons) have been detected in varying amounts in many meteorites. Proposed origins for these compounds have included extraterrestrial...
Supercritical fluid extraction of the non-polar organic compounds in meteorites (2001)
Sephton, M.A., Pillinger, C.T., Gilmour, I.
The carbonaceous chondrite meteorites contain a variety of extraterrestrial organic molecules. These organic components provide a valuable insight into the formation and evolution of the solar...
A number of extraterrestrial objects, such as meteorites and interplanetary dust particles, are known to contain organic matter in the form of complex macromolecular materials. These organic networks...
The association between organic matter and clay minerals in carbonaceous chondrites (2001)
Pearson, V. K., Sephton, M. A., Bland, P. A., Franchi, I. A., Gilmour, I.
There is an established relationship between organic matter content and aqueous alteration processes [1,2]. However, the relationship between meteoritic organic matter and individual aqueously...
Analysis of Tagish Lake macromolecular organic material (2001)
Gilmour, I., Pearson, V. K., Sephton, M. A.
Macromolecular material is, by far, the major organic component of meteorites. Flash pyrolysis GCMS has been used to investigate this organic component in Tagish Lake. It is more condensed, less...
Dual isotopic composition of methane in Murchison meteorite (2001)
Butterworth, A. L., Sephton, M. A., Gilmour, I.
Dual isotopic composition (H and C) of methane extracted from a small sample of Murchison meteorite reveals a deuterium enrichment for this molecule, indicating the presence of interstellar hydrogen.
Pearson, V. K., Sephton, M. A., Gilmour, I., Franchi, I. A.
A study into the hydrogen isotopic characteristics of whole rock samples of carbonaceous chondrites and their comparison with a whole rock sample of the Tagish Lake meteorite.
Attempts to separate the Q-noble gas carrier in Yilmia (2001)
Verchovsky, A. B., Sephton, M. A., Wright, I. P., Pillinger, C. T.
Cyclic diaryl ethers in a Late Permian sediment (1999)
Sephton, M.A., Looy, C.V., Veefkind, R.J., Visscher, H., Brinkhuis, H., Leeuw, J.W. De
Abundant cyclic diaryl ethers, such as dibenzofuran and its alkyl derivatives are found in solvent extracts and kerogen pyrolysates of a Late Permian organic-rich marl from northern Italy. These...