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... > Science Keywords > EARTH SCIENCE > SOLID EARTH > GEOCHEMISTRY > GEOCHEMICAL PROPERTIES > ROCK-EVAL PRYOLYSIS

Preferred term

ROCK-EVAL PRYOLYSIS  

Definition

  • Rock-Eval Pyrolysis is used to identify the type and maturity of organic matter and to detect petroleum potential in sediments. Rock Eval pyrolysis is done using the Delsi-Nermag Rock Eval II Plus TOC module. Samples chosen to be measured on the Rock Eval are usually subsampled from the freeze-dried material previously crushed for analyses on the coulometer and CNS. The Rock Eval (RE) pyrolysis method consists of a programmed temperature heating (in a pyrolysis oven) in an inert atmosphere (helium) of a small sample (~100 mg) to quantitatively and selectively determine (1) the free hydrocarbons contained in the sample and (2) the hydrocarbon- and oxygen-containing compounds (CO2) that are volatilized during the cracking of the unextractable organic matter in the sample (kerogen). (en)

Broader concept

Change note

  • 2013-02-18 08:18:32.0 [tbs1979] Insert Concept add broader relation (ROCK-EVAL PRYOLYSIS [2dc96cc9-a128-4dc8-b8c8-1d799201b5c6,82361] - GEOCHEMICAL PROPERTIES [048df94e-841d-4f4d-a5c5-6683d1d07aa6,82357]);
  • 2013-03-11 13:39:43.0 [tbs1979] insert Definition (id: null text: Rock-Eval Pyrolysis is used to identify the type and maturity of organic matter and to detect petroleum potential in sediments. Rock Eval pyrolysis is done using the Delsi-Nermag Rock Eval II Plus TOC module. Samples chosen to be measured on the Rock Eval are usually subsampled from the freeze-dried material previously crushed for analyses on the coulometer and CNS. The Rock Eval (RE) pyrolysis method consists of a programmed temperature heating (in a pyrolysis oven) in an inert atmosphere (helium) of a small sample (~100 mg) to quantitatively and selectively determine (1) the free hydrocarbons contained in the sample and (2) the hydrocarbon- and oxygen-containing compounds (CO2) that are volatilized during the cracking of the unextractable organic matter in the sample (kerogen). language code: en);

URI

https://gcmd.earthdata.nasa.gov/kms/concept/2dc96cc9-a128-4dc8-b8c8-1d799201b5c6

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