Mohammed Benmakhlouf - Academia.edu (original) (raw)
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China University of Geosciences(Wuhan)
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Papers by Mohammed Benmakhlouf
International Journal of Coal Geology, 2020
This is a PDF file of an article that has undergone enhancements after acceptance, such as the ad... more This is a PDF file of an article that has undergone enhancements after acceptance, such as the addition of a cover page and metadata, and formatting for readability, but it is not yet the definitive version of record. This version will undergo additional copyediting, typesetting and review before it is published in its final form, but we are providing this version to give early visibility of the article. Please note that, during the production process, errors may be discovered which could affect the content, and all legal disclaimers that apply to the journal pertain.
Morocco has been classified into the seventh position according to the recent estimation of the w... more Morocco has been classified into the seventh position according to the recent estimation of the world's reserves of oil shale. Three principle deposits are located in Timahdit, Tarfaya and in Rif regions. The present work concerns the physico-chemical and geochemical study of bituminous rocks of northern Morocco (Rif). Samples from four different sites named: Tangier (TA), Tetouan (TE), Bab Taza (BT) and Arba Ayach (AA) were analyzed by different analytical methods, pyrolysis, thermal, mineralogical and molecular techniques. The Rock-Eval results confirmed the thermal maturation for the sample AA. The content of total organic carbon (TOC) vary from poor to excellent (0.45% to 4.47%), the value of general potential hydrocarbon production (GP) ranged from 0.49 to 13.1 (mgHC/g rock) and the value of the hydrogen index (HI) vary from 37 to 282 (mgHC/gTOC), suggesting types II, III and IV of kerogen. Thermal analysis revealed a total organic content ranging from 4.77 to 7.53%. Elemen...
The bituminous rocks of the Upper Cretaceous in the Moroccan Rif have been assessed and character... more 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 silicapotassium 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, C 27 :C 28 :C 29 regular, C 29 20S/ (20S+20R), C 29 bb/(bb+aa), C 29 /C 30 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.
Tectonics, 2011
The Atlas Mountains are characterized by high elevations and Quaternary volcanism. Long period ma... more The Atlas Mountains are characterized by high elevations and Quaternary volcanism. Long period magnetotelluric data acquired along a NNW-SSE transect reveal the presence of a conductive anomalous mantle below the High Atlas. Data dimensionality analyses show a preferent N80°E strike of the deep resistivity structure in agreement with the induction vector alignment at long periods. Accordingly, a 2D inversion of the data set was carried out. Large resistive bodies at the crustal basement most likely correspond to batholiths emplaced in more conductive metapelites. They are covered by outcropping conductive sedimentary detritic and carbonate rocks. Lithospheric thinning producing anomalous mantle and basin development in the Atlas probably started during Triassic-Jurassic rifting. Inversion tectonics since the Oligocene produced low shortening on previous lithospheric weak zones, with thrusting of the Atlas above the stable African plate. Melting at the top of the anomalous mantle is connected with Quaternary basaltic volcanism in the Middle Atlas.
International Journal of Coal Geology, 2020
This is a PDF file of an article that has undergone enhancements after acceptance, such as the ad... more This is a PDF file of an article that has undergone enhancements after acceptance, such as the addition of a cover page and metadata, and formatting for readability, but it is not yet the definitive version of record. This version will undergo additional copyediting, typesetting and review before it is published in its final form, but we are providing this version to give early visibility of the article. Please note that, during the production process, errors may be discovered which could affect the content, and all legal disclaimers that apply to the journal pertain.
Morocco has been classified into the seventh position according to the recent estimation of the w... more Morocco has been classified into the seventh position according to the recent estimation of the world's reserves of oil shale. Three principle deposits are located in Timahdit, Tarfaya and in Rif regions. The present work concerns the physico-chemical and geochemical study of bituminous rocks of northern Morocco (Rif). Samples from four different sites named: Tangier (TA), Tetouan (TE), Bab Taza (BT) and Arba Ayach (AA) were analyzed by different analytical methods, pyrolysis, thermal, mineralogical and molecular techniques. The Rock-Eval results confirmed the thermal maturation for the sample AA. The content of total organic carbon (TOC) vary from poor to excellent (0.45% to 4.47%), the value of general potential hydrocarbon production (GP) ranged from 0.49 to 13.1 (mgHC/g rock) and the value of the hydrogen index (HI) vary from 37 to 282 (mgHC/gTOC), suggesting types II, III and IV of kerogen. Thermal analysis revealed a total organic content ranging from 4.77 to 7.53%. Elemen...
The bituminous rocks of the Upper Cretaceous in the Moroccan Rif have been assessed and character... more 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 silicapotassium 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, C 27 :C 28 :C 29 regular, C 29 20S/ (20S+20R), C 29 bb/(bb+aa), C 29 /C 30 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.
Tectonics, 2011
The Atlas Mountains are characterized by high elevations and Quaternary volcanism. Long period ma... more The Atlas Mountains are characterized by high elevations and Quaternary volcanism. Long period magnetotelluric data acquired along a NNW-SSE transect reveal the presence of a conductive anomalous mantle below the High Atlas. Data dimensionality analyses show a preferent N80°E strike of the deep resistivity structure in agreement with the induction vector alignment at long periods. Accordingly, a 2D inversion of the data set was carried out. Large resistive bodies at the crustal basement most likely correspond to batholiths emplaced in more conductive metapelites. They are covered by outcropping conductive sedimentary detritic and carbonate rocks. Lithospheric thinning producing anomalous mantle and basin development in the Atlas probably started during Triassic-Jurassic rifting. Inversion tectonics since the Oligocene produced low shortening on previous lithospheric weak zones, with thrusting of the Atlas above the stable African plate. Melting at the top of the anomalous mantle is connected with Quaternary basaltic volcanism in the Middle Atlas.