mardi 17 octobre 2017
Le Maroc, paradis des géologues
Sommaire de ce numéro
Géologie fondamentale : état des connaissances et résultats récents
Géologie fondamentale : état des connaissances et résultats récents
- Les grandes régions géologiques du Maroc ; diversité et soulèvement d’ensemble - André Michard, Omar Saddiqi, Yves Missenard, Mostafa Oukassou, Jocelyn Barbarand
- Rif externe : comment comprendre et expliquer le chaos apparent ? Dominique Frizon de Lamotte, Mohamed Najib Zaghloul, Faouziya Haissen, Geoffroy Mohn, Remi Leprêtre, Oriol Gimeno-Vives, Achraf Atouabat, Mohamed El Mourabet, Anass Abassi
- Déformation active du Rif : GPS, sismicité et géologie montrent l’expulsion d’un coin crustal sud-occidental - Ahmed Chalouan, Jesus Galindo-Zaldivar, Antonio J. Gil, Kaoutar Bargach
- La Meseta, un terrain vagabond ou la marge fragmentée de l’Anti-Atlas ? Christian Hoepffner, Hassan Ouanaimi et André Michard
- La tectonique de l’Atlas : âge et modalités - Hassan Ibouh et Driss Chafiki
Dater les couches rouges continentales pour définir la géodynamique atlasique - André Charrière et Hamid Haddoumi - Le Précambrien à la bordure nord du craton ouest-africain (Anti-Atlas et Haut Atlas, Maroc) - Abderrahmane Soulaimani, Kevin Hefferan
- Dorsale Reguibat et Massif des Oulad Dlim, l’avancée des connaissances - Pilar Montero, Fernando Bea, Faouziya Haissen, José Francisco Molina-Palma, Francisco González-Lodeiro, Abdellah Mouttaqi, Abdellatif Errami
- Métallogénie et substances minérales
- Géodynamique et cyclicité métallogénique au Maroc - Dominique Gasquet et Alain Cheilletz
- Les mines et la métallogénie du Maroc - Michel Jébrak
- Les dérangements de la série phosphatée dans le district minier de Khouribga (Maroc) : une esquisse de leur origine et de leurs méthodes de cartographie sous couverture quaternaire - Nadia El Kiram, Azzouz Kchikach, Mohamed Jaffal, José Antonio Pena, Teresa Teixido, Roger Guerin, Oussama Khadiri Yazami et Es-Said Jourani
- Les schistes bitumineux au Maroc - Laurent de Walque
Hydrogéologie
- Apports de la géologie du Maroc à la gestion et la planification de ses ressources en eau souterraine - Omar Fassi Fihri
- Évaluation du potentiel des ressources en eau souterraine d’un bassin hydrogéologique d’extension régionale. Cas du bassin du Sebou (Maroc) - Mohamed Sinan, Abdessadek Chtaini, J. Filali Jaouad
- Utilité du monitoring des forages d’exploitation d’eau pour la rationalisation de l’irrigation agricole au Maroc - Fouad Amraoui
- Apport des outils isotopiques à la compréhension du fonctionnement des aquifères marocains et à la quantification de leurs ressources - Cas du Bassin de Sebou - Soumaya Sefrioui, Omar fassi Fihri et Hamid Marah
Aménagements et géotechnique
- Activités néotectoniques et mouvements de terrain dans le Prérif (Secteur de l'autoroute Fès-Taza, Nord Maroc) - Hassan Tabbyaoui, Benoît Deffontaines, Fatima El Hammichi, Abdel-Ali Chaouni et Samuel Magalhaes
- Étude de l’érosion pluviale des talus autoroutiers au Maroc et proposition d’un système de protection par arcades bétonnées : application aux sections Tanger-Port Tanger Med et Fès-Taza - Amal Chehlafi, Azzouz Kchikach et Abdelkrim Derradji
- La construction des barrages et la politique de mobilisation des eaux de surface au Maroc - Khalid El Ghomari
- Adaptations d’un projet de barrage en cours de construction : l’exemple du barrage de Moulay Bouchta en zone de flysch altéré - Ahmed F. Chraibi et Abdelaaziz Zaki
Patrimoine géologique
- Patrimoine géologique marocain et développement durable : l’exemple du Dévonien du Tafilalt, Anti-Atlas oriental - Ahmed El Hassani, Sarah Aboussalam, Thomas Becker, Mohamed El Wartiti et Farah El Hassani
- Les marqueurs permiens comme patrimoine géologique à promouvoir et à protéger dans le massif hercynien du Maroc central - Mohammed El Wartiti, Mohamed Zahraoui et Ahmed El Hassani
dimanche 15 octobre 2017
samedi 23 septembre 2017
Revolutionary new drill rig
A revolutionary new drill rig that could revitalise Australia’s mining industry has undergone successful field trials in South Australia’s outback, bringing it a step closer to commercialisation.
The prototype coiled tubing drill rig, the RoXplorer®, was developed by the Deep Exploration Technologies Cooperative Research Centre (DET CRC) and underwent its first extensive, field drilling trials in late February – early March 20 km west Port Augusta.
The trial site was adjacent to a hole previously drilled by conventional (diamond) drilling methods and provided a typical example of the thick cover sequence of the Olympic Iron-Oxide-Copper-Gold (IOCG) Province of South Australia.
Coiled tubing drilling differs from conventional drilling in that the drill string is a continuous, malleable steel coil, as opposed to being comprised of individual steel rods that must be connected and disconnected.
The RoXplorer® rig is a hybrid rig and first drilled, cased with steel pipe and cemented the top ~30 m of the hole. The main hole was then drilled through the cement and into open formation with a downhole hammer and percussion bit powered by a downhole motor. The rig drilled 367 metres in four successive 12-hour shifts, for an average of ~92 metres per shift and at an average penetration rate when drilling of ~15 metres per hour. This compares with around 25 metres per shift at an average penetration rate when drilling of ~3 metres per hour diamond drilling in the adjacent hole.
The hole was terminated at just over 400 metres depth having intersected the target basalt. The cuttings recovered were representative of the geology intersected in the adjacent conventional (diamond) hole.
DET CRC CEO Richard Hillis said the performance of the RoXplorer® Rig and CT drilling ‘system’ was outstanding.
“It is a revelation to watch rapid drilling with no rotation, no-one near the drill string, no rod handling and no fluids on the surface. When going well it is wonderfully dull. When tripping in and out of the hole it is wonderfully quick. Not many people see the start of a revolution in an industry and I was lucky enough to see one on the Eyre Peninsula,” he said. The RoXplorer® Rig weighs only 15 tonnes and can be easily road transported without the need for special permits. As well as being fast and cheap, it offers a substantial improvement in safety because individual rods do not need to be manually handled (moved or connected). The system also offers environmental benefits because drilling fluids are fully recycled using an above-ground AMC Solids Removal Unit (filters and centrifuges) and no sump is dug.
The successful trials represent the culmination of an ~$20M research project by the Deep Exploration Technologies Cooperative Research Centre (DET CRC) to develop a next generation drill rig for greenfields mineral exploration that can drill at a cost of $50/metre to a depth of 500 metres.
DET CRC acknowledges the outstanding team of drillers, assistants, technicians, scientists and engineers from Boart Longyear, CSIRO, Curtin University, DET CRC, the Geological Survey of South Australia, Imdex, Omnilogix and the University of South Australia that undertook the trails and also acknowledges the significant permitting, logistical, safety and geological expertise provided by the Geological Survey of South Australia in support of the trial.
A final field trial is expected to be undertaken around the middle of the year before the technology is offered to DET CRC partners for licencing. The timing of commercial release of the RoXplorer® Rig will be subject to the licencing process and its commercialisation by the licensor.
DET CRC was established in 2010 under the Australian Government’s CRC Program to develop technologies to discover new mineral deposits at depth beneath barren rock cover.
source : https://www.mining3.com/revolutionary-new-drill-rig/
vendredi 22 septembre 2017
mercredi 20 septembre 2017
mardi 19 septembre 2017
vendredi 15 septembre 2017
Exploration Software (free)
The following software packages are not endorsed by Mining Geology HQ but are free open-source software. High-quality work can be performed on these software packages which makes them ideal for the geologist on a shoe string-budget. After all, software is just a tool to convey your understanding, experience, and knowledge. The key is quality data, well-tested hypotheses, and sound interpretations.
Geoscience ANALYST - Developed by Mira Geoscience, this 3D visualization and communication software is for integrated, multi-disciplinary Earth models and data. Check out the video here.
QGIS - Open-source GIS software.
ParaViewGeo - Open-source visualization package created specifically for the exploration and mining industry.
DXF2XYZ - Software to convert a DXF file to an XYZ file, (i.e., a comma delimited text file containing just xyz coordinates). It is useful for extracting the raw XYZ coordinates from a DXF file containing contours or other elevation entities.
3D Viewer - Simple viewer for various 3D shape files (dxf, dwg, tin, 3ds).
GCDkit - Geochemical data toolkit for handling and re-calculating whole-rock analyses from igneous rocks. It is written in R, a language and environment for statistical computing and graphics.
Structural Geology programs - Below are hyperlinks to a variety of structural geology related software which integrate nicely with Google Earth. They are provided by Dr. Rick Allmendinger (Professor at Cornell): Stereonet 9, Faultkin 7, GeoMapDataExtractor, MohrPlotter, FaultForward v6, AreaErrorProp, plus additional utility software available from his website.
source : http://www.mininggeologyhq.com/mineral-exploration/
Geoscience ANALYST - Developed by Mira Geoscience, this 3D visualization and communication software is for integrated, multi-disciplinary Earth models and data. Check out the video here.
QGIS - Open-source GIS software.
ParaViewGeo - Open-source visualization package created specifically for the exploration and mining industry.
DXF2XYZ - Software to convert a DXF file to an XYZ file, (i.e., a comma delimited text file containing just xyz coordinates). It is useful for extracting the raw XYZ coordinates from a DXF file containing contours or other elevation entities.
3D Viewer - Simple viewer for various 3D shape files (dxf, dwg, tin, 3ds).
GCDkit - Geochemical data toolkit for handling and re-calculating whole-rock analyses from igneous rocks. It is written in R, a language and environment for statistical computing and graphics.
Structural Geology programs - Below are hyperlinks to a variety of structural geology related software which integrate nicely with Google Earth. They are provided by Dr. Rick Allmendinger (Professor at Cornell): Stereonet 9, Faultkin 7, GeoMapDataExtractor, MohrPlotter, FaultForward v6, AreaErrorProp, plus additional utility software available from his website.
source : http://www.mininggeologyhq.com/mineral-exploration/
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