Bowden, S.A. and Court, R.W. and Milner, D. and Baldwin, E.C. and Lindgren, P. and Crawford, Ian A. and Parnell, J. and Burchell, M.J. (2008) The thermal alteration by pyrolysis of the organic component of small projectiles of mudrock during capture at hypervelocity. Journal of Analytical and Applied Pyrolysis 82 (2), pp. 312-314. ISSN 0165-2370.Full text not available from this repository.
In a series of experiments the pyrolytic effects of the heating induced during the hypervelocity impact (HVI) of small projectiles of high TOC mudrock were observed. Impacts at these high speeds (km s−1) release sufficient energy to vaporise metal projectiles, and the temperatures created greatly exceed the pyrolysis temperatures typically employed during laboratory studies of the thermal alteration of sedimentary organic matter. Despite this the organic geochemical analyses of projectiles of Orcadian Laminite impacted into targets of sand and water at hypervelocities provides evidence that the structural backbone of biomarkers has remained intact and that only a comparatively low degree of thermal alteration (pre-oil window) has occurred. While further studies are necessary, it appears that the organic component of a projectile captured at hypervelocity will be a slightly thermally altered sample of its precursor.
|Keyword(s) / Subject(s):||Hypervelocity impact, biomarker|
|School or Research Centre:||Birkbeck Schools and Research Centres > School of Science > Earth Sciences|
|Date Deposited:||09 Feb 2011 14:32|
|Last Modified:||17 Apr 2013 12:18|
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