2008
DOI: 10.1016/j.gca.2007.12.004
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Organic nitrogen chemistry during low-grade metamorphism

Abstract: -Most of the organic nitrogen (N org ) on Earth is disseminated in crustal sediments and rocks in the form of fossil nitrogen-containing organic matter. The chemical speciation of fossil N org within the overall molecular structure of organic matter changes with time and heating during burial. Progressive thermal evolution of organic matter involves phases of enhanced elimination of N org and ultimately produces graphite containing only traces of nitrogen. Long-term chemical and thermal instability makes the c… Show more

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Cited by 136 publications
(108 citation statements)
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References 134 publications
(202 reference statements)
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“…The software XPSPEAK was used in the spectra curve resolution and data treatment. Pyrrolic (N-5), pyridinic (N-6) and quaternary nitrogen (N-Q) were observed as assigned by Boudou et al (2008 and references therein) on other samples.…”
Section: Methodsmentioning
confidence: 63%
See 1 more Smart Citation
“…The software XPSPEAK was used in the spectra curve resolution and data treatment. Pyrrolic (N-5), pyridinic (N-6) and quaternary nitrogen (N-Q) were observed as assigned by Boudou et al (2008 and references therein) on other samples.…”
Section: Methodsmentioning
confidence: 63%
“…Whatever the maceral composition, coal nitrogen is mostly organic and dominantly presented as pyrrolic, pyridinic, and quaternary nitrogen functional groups within the carbon matrix (Boudou et al, 2008;Gammon et al, 2003;Kelemen et al, 1994;Kelemen et al, 2007;Pels et al, 1995). Over a wide coal rank range (carbon 65-95 wt.…”
Section: Introductionmentioning
confidence: 99%
“…Further, reservoirs of geological N can occur as silicate-bound ammonium, organic N in sedimentary organic matter, or nitrate in evaporites. Variation in both the amount and form of rock N is controlled by local depositional environments, the degree of biological and thermal digenesis in sedimentary basins, and the degree of N volatilization during metamorphism (Bebout and Fogel, 1992;Hedges and Keil, 1995;Hedges et al, 1999;Boudou et al, 2008). Rock-bound nitrate can be seen in desert/arid ecosystems where hydrological losses are minimal and nitrate accumulates at depth or in the surface of caliche deposits (Walvoord et al, 2003).…”
Section: Parent Materialsmentioning
confidence: 99%
“…Laboratory studies and geologic considerations (Littke et al 1995;Krooss et al 2005;Boudou et al 2008) led to the conclusion that significant portions of the nitrogen fixed in the kerogen and in clay minerals in form of K-substituting ammonium, are liberated during very low-grade metamorphism of shaly sediments and coal. On the other hand, kerogen reached the remaining, relatively small part of its HC-gas potential, in roughly the same metamorphic phase.…”
Section: Source(s) Of the Hc-gas -N 2 Fluidmentioning
confidence: 99%