Chromatographic study of the organic matter from Moroccan Rif bituminous rocks

The bituminous rocks of the Upper Cretaceous in the Moroccan Rif have been assessed and characterized in detail using organic geochemical techniques and a variety of organic geochemical parameters. The organic matter from 4 sites was studied in order to determine its thermal maturity and its deposit...

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Main Authors: Khalihena Groune, Mohammed Halim, Laurent Lemée, Mohammed Benmakhlouf, André Amblès
Format: Article
Language:English
Published: Elsevier 2019-11-01
Series:Arabian Journal of Chemistry
Online Access:http://www.sciencedirect.com/science/article/pii/S1878535214002317
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spelling doaj-a759ebf7b2af4190a7f8f4bc938847aa2020-11-25T01:53:19ZengElsevierArabian Journal of Chemistry1878-53522019-11-0112715521562Chromatographic study of the organic matter from Moroccan Rif bituminous rocksKhalihena Groune0Mohammed Halim1Laurent Lemée2Mohammed Benmakhlouf3André Amblès4Laboratoire Physico-chimie des Matériaux, Catalyse et Environnement, Département de Chimie, Faculté des Sciences de Rabat, Université Mouhammed V–Agdal, 4 avenue Ibn Battouta, B.P. 1014, Rabat, Morocco; Corresponding author. Tel./fax: +212 05 37 77 54 40.Laboratoire Physico-chimie des Matériaux, Catalyse et Environnement, Département de Chimie, Faculté des Sciences de Rabat, Université Mouhammed V–Agdal, 4 avenue Ibn Battouta, B.P. 1014, Rabat, MoroccoUniversité de Poitiers-CNRS IC2MP (UMR 7285), 4, rue Michel Brunet (Bât B27), BP 633 86022 Poitiers Cedex, FranceDépartement de Géologie, Faculté des Sciences de Tétouan, Université Abdelmalek Essadi, BP. 2121 M’Hannech II, 93030 Tétouan, MoroccoUniversité de Poitiers-CNRS IC2MP (UMR 7285), 4, rue Michel Brunet (Bât B27), BP 633 86022 Poitiers Cedex, FranceThe bituminous rocks of the Upper Cretaceous in the Moroccan Rif have been assessed and characterized in detail using organic geochemical techniques and a variety of organic geochemical parameters. The organic matter from 4 sites was studied in order to determine its thermal maturity and its depositional environments. The organic extracts (bitumens) were fractionated on silica-potassium hydroxide column according to the aliphatic hydrocarbons, acid compounds and polar compounds. Aliphatic hydrocarbons were identified by gas chromatography and mass spectrometry (GC/MS).The distribution of the aliphatic hydrocarbon fractions, and the various organic geochemical parameters (pristane/phytane, isoprenoids/n-alkanes, CPI, C27:C28:C29 regular, C2920S/(20S+20R), C29ββ/(ββ+αα), C29/C30 hopanes and Ts/Tm) showed that the studied samples were generally mature. Two of the 4 samples appeared to be derived from source rocks deposited under anoxic conditions while suboxic to oxic conditions seemed to have been dominant for the remaining two samples. Rock–Eval pyrolysis data in addition to GC results suggested types II, III and IV kerogens for the studied samples. Keywords: Chromatography, Hydrocarbons, Biomarkers, Rock Eval pyrolysis, Bituminous rocks, Moroccan Rifhttp://www.sciencedirect.com/science/article/pii/S1878535214002317
collection DOAJ
language English
format Article
sources DOAJ
author Khalihena Groune
Mohammed Halim
Laurent Lemée
Mohammed Benmakhlouf
André Amblès
spellingShingle Khalihena Groune
Mohammed Halim
Laurent Lemée
Mohammed Benmakhlouf
André Amblès
Chromatographic study of the organic matter from Moroccan Rif bituminous rocks
Arabian Journal of Chemistry
author_facet Khalihena Groune
Mohammed Halim
Laurent Lemée
Mohammed Benmakhlouf
André Amblès
author_sort Khalihena Groune
title Chromatographic study of the organic matter from Moroccan Rif bituminous rocks
title_short Chromatographic study of the organic matter from Moroccan Rif bituminous rocks
title_full Chromatographic study of the organic matter from Moroccan Rif bituminous rocks
title_fullStr Chromatographic study of the organic matter from Moroccan Rif bituminous rocks
title_full_unstemmed Chromatographic study of the organic matter from Moroccan Rif bituminous rocks
title_sort chromatographic study of the organic matter from moroccan rif bituminous rocks
publisher Elsevier
series Arabian Journal of Chemistry
issn 1878-5352
publishDate 2019-11-01
description The bituminous rocks of the Upper Cretaceous in the Moroccan Rif have been assessed and characterized in detail using organic geochemical techniques and a variety of organic geochemical parameters. The organic matter from 4 sites was studied in order to determine its thermal maturity and its depositional environments. The organic extracts (bitumens) were fractionated on silica-potassium hydroxide column according to the aliphatic hydrocarbons, acid compounds and polar compounds. Aliphatic hydrocarbons were identified by gas chromatography and mass spectrometry (GC/MS).The distribution of the aliphatic hydrocarbon fractions, and the various organic geochemical parameters (pristane/phytane, isoprenoids/n-alkanes, CPI, C27:C28:C29 regular, C2920S/(20S+20R), C29ββ/(ββ+αα), C29/C30 hopanes and Ts/Tm) showed that the studied samples were generally mature. Two of the 4 samples appeared to be derived from source rocks deposited under anoxic conditions while suboxic to oxic conditions seemed to have been dominant for the remaining two samples. Rock–Eval pyrolysis data in addition to GC results suggested types II, III and IV kerogens for the studied samples. Keywords: Chromatography, Hydrocarbons, Biomarkers, Rock Eval pyrolysis, Bituminous rocks, Moroccan Rif
url http://www.sciencedirect.com/science/article/pii/S1878535214002317
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