In situ and laboratory investigation of the alteration of Boom Clay (Oligocene) at the air–geological barrier interface within the Mol underground facility (Belgium): Consequences on kerogen and bitumen compositions

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In situ and laboratory investigation of the alteration of Boom Clay (Oligocene) at the air–geological barrier interface within the Mol underground facility (Belgium): Consequences on kerogen and bitumen compositions. / Blanchart, P.; Faure, P.; Bruggeman, Christophe; De Craen, Mieke; Michels, R.

In: Applied Geochemistry, Vol. 27, No. 12, 12.2012, p. 2476-2485.

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@article{fd1533cd27fb4db0854e100bb54792b9,
title = "In situ and laboratory investigation of the alteration of Boom Clay (Oligocene) at the air–geological barrier interface within the Mol underground facility (Belgium): Consequences on kerogen and bitumen compositions",
abstract = "During excavation of galleries within the Boom Clay, the physico-chemical conditions are significantly modified as an air-clay interface is created. In order to study the long-term impact of the air-clay contact on the organic matter contained in the Boom Clay, two types of samples were studied: (1) a reference series of clay samples having been in contact with the atmosphere of the HADES gallery for increasing times up to several years and (2) unaltered clay samples submitted to artificial oxidation in a ventilated oven at 80 degrees C. The evolution of geochemical data of the two series was compared using Rock-Eval pyrolysis, GC-MS and size exclusion chromatography. The evolution of geochemical parameters during air alteration for the two series are very similar. They show progressive oxidation of kerogen accompanied by the release of bitumen enriched in low molecular weight constituents. The results show that (1) air oxidation is a major process in the in situ alteration of the organic matter of Boom Clay within the HADES galleries, (2) laboratory oxidation experiments at 80 degrees C yield similar results as in situ air alteration of Boom Clay.",
keywords = "Boom Clay, organic matter, oxidation, perturbation",
author = "P. Blanchart and P. Faure and Christophe Bruggeman and {De Craen}, Mieke and R. Michels",
note = "Score = 10",
year = "2012",
month = dec,
doi = "10.1016/j.apgeochem.2012.07.016",
language = "English",
volume = "27",
pages = "2476--2485",
journal = "Applied Geochemistry",
issn = "0883-2927",
publisher = "Elsevier",
number = "12",

}

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TY - JOUR

T1 - In situ and laboratory investigation of the alteration of Boom Clay (Oligocene) at the air–geological barrier interface within the Mol underground facility (Belgium): Consequences on kerogen and bitumen compositions

AU - Blanchart, P.

AU - Faure, P.

AU - Bruggeman, Christophe

AU - De Craen, Mieke

AU - Michels, R.

N1 - Score = 10

PY - 2012/12

Y1 - 2012/12

N2 - During excavation of galleries within the Boom Clay, the physico-chemical conditions are significantly modified as an air-clay interface is created. In order to study the long-term impact of the air-clay contact on the organic matter contained in the Boom Clay, two types of samples were studied: (1) a reference series of clay samples having been in contact with the atmosphere of the HADES gallery for increasing times up to several years and (2) unaltered clay samples submitted to artificial oxidation in a ventilated oven at 80 degrees C. The evolution of geochemical data of the two series was compared using Rock-Eval pyrolysis, GC-MS and size exclusion chromatography. The evolution of geochemical parameters during air alteration for the two series are very similar. They show progressive oxidation of kerogen accompanied by the release of bitumen enriched in low molecular weight constituents. The results show that (1) air oxidation is a major process in the in situ alteration of the organic matter of Boom Clay within the HADES galleries, (2) laboratory oxidation experiments at 80 degrees C yield similar results as in situ air alteration of Boom Clay.

AB - During excavation of galleries within the Boom Clay, the physico-chemical conditions are significantly modified as an air-clay interface is created. In order to study the long-term impact of the air-clay contact on the organic matter contained in the Boom Clay, two types of samples were studied: (1) a reference series of clay samples having been in contact with the atmosphere of the HADES gallery for increasing times up to several years and (2) unaltered clay samples submitted to artificial oxidation in a ventilated oven at 80 degrees C. The evolution of geochemical data of the two series was compared using Rock-Eval pyrolysis, GC-MS and size exclusion chromatography. The evolution of geochemical parameters during air alteration for the two series are very similar. They show progressive oxidation of kerogen accompanied by the release of bitumen enriched in low molecular weight constituents. The results show that (1) air oxidation is a major process in the in situ alteration of the organic matter of Boom Clay within the HADES galleries, (2) laboratory oxidation experiments at 80 degrees C yield similar results as in situ air alteration of Boom Clay.

KW - Boom Clay

KW - organic matter

KW - oxidation

KW - perturbation

UR - http://ecm.sckcen.be/OTCS/llisapi.dll/open/ezp_127348

UR - http://knowledgecentre.sckcen.be/so2/bibref/10001

U2 - 10.1016/j.apgeochem.2012.07.016

DO - 10.1016/j.apgeochem.2012.07.016

M3 - Article

VL - 27

SP - 2476

EP - 2485

JO - Applied Geochemistry

JF - Applied Geochemistry

SN - 0883-2927

IS - 12

ER -

ID: 68751