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- W2015031815 endingPage "169" @default.
- W2015031815 startingPage "152" @default.
- W2015031815 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." @default.
- W2015031815 created "2016-06-24" @default.
- W2015031815 creator A5001214000 @default.
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- W2015031815 creator A5039091058 @default.
- W2015031815 creator A5053107392 @default.
- W2015031815 creator A5054234397 @default.
- W2015031815 date "2006-09-01" @default.
- W2015031815 modified "2023-09-27" @default.
- W2015031815 title "Nitrogen isotopic evolution of carbonaceous matter during metamorphism: Methodology and preliminary results" @default.
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