NITROGEN ISOTOPIC EVOLUTION OF CARBONACEOUS MATTER DURING METAMORPHISM: METHODOLOGY AND PRELIMINARY RESULTS

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dc.contributor.author Ader M.
dc.contributor.author Cartigny P.
dc.contributor.author Petit E.
dc.contributor.author Javoy M.
dc.contributor.author Boudou J.P.
dc.contributor.author Oh J.H.
dc.date.accessioned 2024-09-14T06:08:11Z
dc.date.available 2024-09-14T06:08:11Z
dc.date.issued 2006
dc.identifier https://www.elibrary.ru/item.asp?id=28026596
dc.identifier.citation Chemical Geology, 2006, 232, 3-4, 152-169
dc.identifier.issn 0009-2541
dc.identifier.uri https://repository.geologyscience.ru/handle/123456789/45111
dc.description.abstract Nitrogen content and isotopic composition of carbonaceous-rich metasediments were determined by on-line and sealed-tube combustion using ultra-high vacuum line and static mass spectrometer adapted to analyse nitrogen nanomoles. Accurate measurements showed that nitrogen amount released by on-line combustion technique was underestimated to various extents. As a result, the nitrogen isotopic composition was not correctly determined. In contrast, sealed-tube combustion appeared to yield the most reproducible and accurate measurements, except for nitrogen depleted carbonaceous matter (semi-graphite to graphite transition) containing less than around 60 ppm of nitrogen, which were contaminated during their extraction from the rock. In view of that, a preliminary sealed-tube investigation of the organic nitrogen content and isotopic composition in a homogenous series of low-grade metasediments was undertaken: in spite of an important nitrogen loss, the carbonaceous matter nitrogen isotopic composition remains about the same during the meta-anthracite and semi-graphitisation stages. Inferences on the process of organic nitrogen mineralization during carbonaceous matter metamorphism can be drawn and several paleo-biogeochemical implications envisaged. © 2006 Elsevier B.V. All rights reserved.
dc.subject CARBONACEOUS MATTER
dc.subject GRAPHITE
dc.subject KEROGEN
dc.subject METAMORPHISM
dc.subject NITROGEN ISOTOPES
dc.title NITROGEN ISOTOPIC EVOLUTION OF CARBONACEOUS MATTER DURING METAMORPHISM: METHODOLOGY AND PRELIMINARY RESULTS
dc.type Статья
dc.identifier.doi 10.1016/j.chemgeo.2006.02.019


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