The mass–temperature relation for clusters of galaxies     

Jens Hjorth  Jamila Oukbir  & Eelco van Kampen 《Monthly notices of the Royal Astronomical Society》1998,298(1):L1-L5

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R?le du brassage et du stockage magmatique dans l’homogénéisation des granito?des calco-alcalins: Cas du pluton composite de Za?r (Maroc central)     

Jamila Ha?meur et Iz-Eddine El Amrani El Hassani 《Eclogae Geologicae Helvetiae》2005,98(2):219-236

Resume.  Le pluton calco-alcalin de Za?r est composé de trois principaux faciès pétrographiques répartis en deux unités granitiques imbriquées. Ces faciès, de différents degrés d’hybridation et de différenciation, résultent de mélanges magmatiques entre des magmas basiques mantelliques de type ?HAB? (basalte hyperalumineux) et un magma anatectique issu de la fusion partielle de matériaux crustaux (métapélites ou métagrauwackes). La répartition des faciès granitiques de Za?r peut s’expliquer selon un modèle pétrogénétique de type ?MASH? (melting-assimilation-storage-homogenization) où des magmas hybrides seraient formés suivant différentes proportions de mélanges magmatiques acide-basique. Ces magmas auraient subides conditions d’ascension spécifiques et seraient mis en place sous forme de 3 grandes injections successives:

1)	Une injection précoce de magma fortement hybride donne la granodiorite-tonalite du SW, assez faiblement homogénéisée et à grands xénolites et enclaves microgrenues mafiques (EMM) dont les compositions pétrographiques, chimiques et isotopiques initiales sont bien préservées
2)	Une injection, plus tardive et sur une longue distance, de magma relativement plus différencié, donne le monzogranite-granodiorite du NE, assez bien homogénéisé et riche en petites EMM dont les compositions ont été rééquilibrées avec celles du granite h?te
3)	Une injection très tardive après un stockage de quelques millions d’années et un important brassage magmatique ayant permis un mélange magmatique complet (mixing) des deux composants acide et basique. Cela donne le leucogranite central, très différencié et parfaitement homogène

Manuscrit re?u le 12 décembre 2003 Révision acceptée le 9 mai 2005  相似文献   

On the errors on Ω₀: Monte Carlo simulations of the EMSS cluster sample     

Jamila Oukbir  Monique Arnaud 《Monthly notices of the Royal Astronomical Society》2001,326(2):453-462

We perform Monte Carlo simulations of synthetic EMSS cluster samples, to quantify the systematic errors and the statistical uncertainties on the estimate of Ω₀ derived from fits to the cluster number density evolution and to the X-ray temperature distribution up to z =0.83 . We identify the scatter around the relation between cluster X-ray luminosity and temperature to be a source of systematic error, of the order of Δ_systΩ₀=0.09 , if not properly taken into account in the modelling. After correcting for this bias, our best Ω₀ is 0.66. The uncertainties on the shape and normalization of the power spectrum of matter fluctuations imply relatively large uncertainties on this estimate of Ω₀, of the order of Δ_statΩ₀=0.1 at the 1 σ level. On the other hand, the statistical uncertainties due to the finite size of the high-redshift sample are twice as small. Therefore, what is needed in order to improve the accuracy of Ω₀ estimates based on cluster number density evolution is a more reliable measure of the local temperature function and a better understanding of the cluster observed properties both in the local Universe and at high redshift, that is the relation between cluster mass, temperature and luminosity. This requires detailed observations of X-ray selected cluster samples, in comparison with hydrodynamic simulations including refined physics.  相似文献   

L'upwelling de la côte atlantique du Maroc entre 1994 et 1998     

Ahmed Makaoui  Abdelattif Orbi  Karim Hilmi  Soukaina Zizah  Jamila Larissi  Mohammed Talbi 《Comptes Rendus Geoscience》2005,337(16):1518

The pelagic ecosystem of the Moroccan Atlantic coast is influenced by the spatiotemporal variability of upwelling. The changes in the physicochemical and biological parameters as well as their interrelationship and regrouping by the principal components analysis allowed us to subdivide the Atlantic coast in four active areas: two areas located at the north of Cape Juby (28°N), characterised by a summery activity and two areas located at the south, active permanently, with a variable intensity. To cite this article: A. Makaoui et al., C. R. Geoscience 337 (2005).  相似文献   

Petrology of lower-middle Miocene Zoumi Flysch Fm. (Mesorif sub-domain,Rif belt,Morocco): first evidence of mixed mode provenance and geodynamic setting     

Mohamed El Mourabet  Ahmed Barakat  Jamila Rais  Mohamed Najib Zaghloul  Achraf Atouabat 《Arabian Journal of Geosciences》2018,11(9):209

The Zoumi Basin was generated in a collisional tectonic setting during the Lower-Middle Miocene. The syn-orogenic flysch deposits of the basin have been well investigated by petrographic and geochemical studies to characterize the composition, source to sink routing system, and tectonic setting of the Zoumi flysch. Forty-three sandstone samples and 45 mudstone samples have been gathered from six measured stratigraphic sections. These samples have been analyzed using XRD, XRF, inductively coupled plasma-mass spectrometry (ICP-MS) for mudrocks and petrographic investigation for sandstones. The Lower-Middle Miocene Zoumi flysch is defined as sublitharenites and quartzarenites according to mineralogical content. Detrital grains are commonly subangular to subrounded, poorly sorted, and rich in quartz grains. Point counting modal analysis leads to craton interior and recycled orogen provenance with significant first-cycle sediment supply and low sedimentary recycling. Several chemical ratios (Al₂O₃/TiO₂, La/Th, Cr/Th, Th/Sc, Zr/Sc) as well as chondrite-normalized REE patterns with flat HREE, LREE enrichment, and negative Eu anomaly suggest a dominant felsic rock sources. However, V-Ni-La*4, V-Ni-Th*10, and Th/Sc vs. Cr/Th plots do not exclude a mafic supply source nature which is evidenced by numerous ophiolitic outcrops scattered throughout the Mesorifan Subdomain (Mesorifan Ophiolitic Suture Zone).  相似文献   

Seismic, gravity, and wire line logging characterization of the Zéramdine fault corridor and its influence in the deep Miocene aquifers distribution (east-central Tunisia)     

Fethi Lachaal  Hakim Gabtni  Mourad Bédir  Jamila Tarhouni 《Arabian Journal of Geosciences》2012,5(6):1391-1398

In the Jemmel?CZéramdine region, the combined analysis of petroleum well data, seismic reflection profiles, and gravity data show the presence of the Zéramdine fault corridor, which was activated in the Neogene period. Both tectonic activity and fluvio-deltaic sedimentation are the origin of the lithologic and hydrodynamic heterogeneities. Thus, the Zéramdine fault corridor constitutes a limit between two hydraulic systems formed by Miocene sandy reservoir layers. These reservoirs have not been exploited yet and could be new water resources which can extremely benefit the region; only the upper one is exploited in the Jemmel?CBembla and Zéramdine?CBéni Hassen deep aquifers. The wire line logging, seismic reflection, and gravity interpretations show the distribution of the Miocene layers which formed the Sahel Miocene deep aquifers. The Zéramdine fault corridor leads to a spatial variability in number, distribution, depths, and thicknesses of these reservoir layers. In the northern part of the Zéramdine fault corridor, seven layers were highlighted; their thicknesses range between 15 and 105?m. However, in the southern part, only four strata were deposited: their thicknesses vary between 45 and 53?m. The total porosity of the studied aquifers is about 30%.  相似文献   

Use of a time-domain electromagnetic method with geochemical tracers to explore the salinity anomalies in a small coastal aquifer in north-eastern Tunisia     

Anis Chekirbane  Maki Tsujimura  Atsushi Kawachi  Fethi Lachaal  Hiroko Isoda  Jamila Tarhouni 《Hydrogeology Journal》2014,22(8):1777-1794

The study area is a small coastal plain in north-eastern Tunisia. It is drained by an ephemeral stream network and is subject to several pollutant discharges such as oilfield brine coming from a neighboring oil company and wastewater from Somâa city, located in the upstream of the plain. Furthermore, a hydraulic head near the coastal part of the aquifer is below sea level, suggesting that seawater intrusion may occur. A time-domain electromagnetic (TDEM) survey, based on 28 soundings, was conducted in Wadi Al Ayn and Daroufa plains to delineate the saline groundwater. Based on longitudinal and transversal resistivity two-dimensional pseudosections calibrated with boring data, the extent of saline water was identified. Geochemical tracers were combined with the resistivity dataset to differentiate the origin of groundwater salinization. In the upstream part of the plain, the infiltration of oilfield brine through the sandy bed of Wadi Al Ayn seems to have a considerable effect on groundwater salinization. However, in the coastal part of the aquifer, groundwater salinization is due to seawater intrusion and the saltwater is reaching an inland extent around 1.3 km from the shoreline. The contribution ratios of saline water bodies derived from the inverted chloride data vary for the oilfield brine from 1 to 13 % and for the seawater from 2 to 21 %.  相似文献