A5043515651- Geological and Geophysical Studies Worldwide
- earthquake and tectonic studies
- Geological and Geochemical Analysis
- Archaeological and Geological Studies
- Geology and Paleoclimatology Research
- Geochemistry and Geologic Mapping
- Archaeological and Historical Studies
- Geological and Tectonic Studies in Latin America
- Paleontology and Stratigraphy of Fossils
- Infectious Diseases and Tuberculosis
- Evolution and Paleontology Studies
- Geological formations and processes
- Geomagnetism and Paleomagnetism Studies
- Metal Extraction and Bioleaching
- Aeolian processes and effects
- Geological and Geophysical Studies
- Remote-Sensing Image Classification
- Mining and Resource Management
- High-pressure geophysics and materials
- Mining Techniques and Economics
- Maritime and Coastal Archaeology
- Solar Radiation and Photovoltaics
- Archaeological Research and Protection
- Primate Behavior and Ecology
- Recycling and utilization of industrial and municipal waste in materials production
University of Hassan II Casablanca
2015-2024
Université de Montpellier
2024
Université Paris-Sud
1991
We investigate the respective roles of crustal tectonic shortening and asthenospheric processes on topography High Atlas surrounding areas (Morocco). The lithospheric structure is modeled with a direct trial‐and‐error algorithm taking into account gravity (Bouguer free air), geoid, heat flow, topography. Three parallel cross sections, crossing Anti‐Atlas ranges, show that lithosphere thinned to 60 km below these mountain ranges. An analysis effect thinning allows us conclude whole...
The internal = northern zones of the Maghrebide belt includes allochthonous massifs that define, together with those from Betics, Sicily and Calabria, a disrupted ‘Alkapeca’ terrane. In Rif transect, taking advantage new thermobarometric geochronologic studies, we recognize metamorphic complex mostly non-Alpine upper plate (Dorsale, Ghomarides–Malaguides), lower (Sebtides–Alpujarrides) affected by HP–LT, then HT–LP Alpine metamorphism. Some eastern allochthons (Temsamane area) display MP...
Abstract The building of the Alpine Rif belt (southern limb Betic-Rif orocline) is restored, mostly based on Tertiary stratigraphic and metamorphic data set. Internal zones derive from an exotic Alboran Terrane partly involved in a S-dipping Betic subduction during Late Cretaceous ?-Eocene. Incipient collision terrane against Iberia triggered back-thrust tectonics south mountain latest Eocene-Oligocene. A N-dipping Maghrebian developed that time up to Middle Miocene, responsible for rifting...
Abstract In the Rif (northern Morocco) and Western Betics (southern Spain), Alboran Domain forms a complex stack of metamorphic nappes including mantle peridotites (Beni Bousera Ronda). We present in this paper new temperature data obtained based on Raman spectroscopy carbonaceous material (RSCM thermometry). lower (lower Sebtides–Alpujárrides) ranges from > 640 °C at base metapelitic sequence to 500 top. The relationships between field isotherms nappe structure show that peak...
Terra Nova, 23, 35–41, 2011 Abstract To put constraints on the Mesozoic to recent growth of Anti‐Atlas system, we investigated temperature–time history rocks by applying extensive low‐temperature thermochronological analysis three Precambrian inliers along coast and 250 km into interior. Bedrocks yield old U–Th/He ages zircon (248–193 Ma) apatite (150–50 also fission‐track 173–121 Ma apatite. These datasets are interpreted as recording passive margin upward movements from central Atlantic...
Abstract In North Africa, the High Atlas belt culminates at more than 4000 m. Morocco, recent work shows that a lithospheric thinning explains about 1000 m of mean topography, remaining topography being related to crustal shortening. We combine regional geology with new apatite fission‐track (AFT) ages constrain timing these events in Marrakech (MHA). inner belt, 10 AFT are comprised between 9 ± 1 and 27 3 Ma. These Neogene indicate MHA underwent significant denudation during time. southern...
Abstract The origin of the Anti‐Atlas relief is one currently debated issues Moroccan geology. To constrain post‐Variscan evolution Central Anti‐Atlas, we collected nine samples from Precambrian basement Bou Azzer‐El Graara inlier for zircon and apatite fission‐track thermochronology. Zircon ages cluster between 340 ± 20 306 Ma, whereas range 171 7 Ma to 133 5 Ma. reflect thermal effect Variscan orogeny (tectonic thickening ca . km‐thick Paleozoic series), likely enhanced by fluid advection....
Abstract The passive margin of South Morocco is a low‐elevated margin. It constitutes one the oldest margins Atlantic Ocean, with an Early Jurassic breakup, and little geological data are available concerning its postrift reactivation so far. We investigated thermal history onshore part low‐temperature thermochronology on apatite crystals. Fission track (U‐Th‐Sm)/He ages we obtained significantly younger than breakup (~190 Ma). range from 107 ± 8 to 175 16 Ma, mean lengths 10.7 0.3 12.5 0.2...
Abstract The High and Middle Atlas intraplate belts in Morocco correspond to Mesozoic rifted basins inverted during the Cenozoic Africa/Eurasia convergence. Marrakech lies at a key location between Atlantic Tethyan influences rifting phase but represents today high reliefs. Age style of deformation mechanisms underlying inversion are nevertheless still debated. To solve this issue, we produced new low‐temperature thermochronology data (fission track [U‐Th]/He on apatite). Two cross sections...
Abstract The present work aims at understanding the tectonic evolution of Jebilet massif, Morocco, during Late Paleozoic as constrained by structural, metamorphic, and geochronological studies. From Devonian to Early Carboniferous, bordering faults controlled opening intracontinental basin (D 0 stage) shown sedimentary infill. This episode was accompanied a magmatic activity, newly dated between 358 ± 7 Ma 336 4 Ma. first record Variscan event affected Visean‐Namurian is represented...
ABSTRACT The continental material of the Saih Hatat window has been affected by a Late Cretaceous, obduction‐related, HP‐LT metamorphism below Oman ophiolite. A high‐rate exhumation process is witnessed Maastrichtian‐Palaeocene onlap onto blueschist‐facies rocks. Drastic metamorphic omissions are documented between lowest, eclogitic units and overlying, ones. Widespread late‐metamorphic shear structures point to top‐to‐the‐NNE detachment, in opposition sense Cretaceous obduction. inversion...
Abstract The Oman Mountain belt offers a unique case study of an Alpine orogen where blueschist- and eclogite-facies metamorphism developed in continental rocks beneath ophiolite the absence collision. We present hereafter first systematic, fission-track (FT) subophiolitic Jebel Akhdar Saih Hatat windows central-southern Mountains. Nineteen samples out 28 yielded significant zircon and/or apatite FT results. All 9 from NE (internal) Hatat, occurred at ca. 300°C < T 550°C (low-grade...