U–Pb geochronology of magmatic and detrital zircons (Zenaga and Bou Azzer-El Graara inliers, Anti-Atlas Belt, Morocco) and a reassessment of the published constraints suggest a revised stratigraphic framework for the lower Anti-Atlas Supergroup. Five major unconformity-bounded lithostratigraphic packages are here distinguished: the two lower units of Paleoproterozoic age are named the Tasserda-Taghatine

The Upper Triassic Dehsard felsic rocks (DFR), leucocratic to hololeucocratic granitic rocks, are exposed in the southernmost of the Phanerozoic Sanandaj-Sirjan zone in the Zagros orogenic belt of south-Central Iran. They intruded into the Paleozoic Khabr and Rutchun metamorphic complexes that consist of marble, greenschist, calcschist and micaschist rocks. The DFR are cut through by monzonitic and

The present study aims to assess the aquifers and delineate the subsurface structures which control the aquifers' geometry using geoelectrical and ground magnetic data. Twenty-four vertical electrical soundings were measured and interpreted, revealing six geoelectrical layers that range in age from the Middle Eocene to Quaternary. The freshwater aquifer exists in the Upper Miocene section and represents

This integrated hydrogeological, hydrochemical and environmental isotopes (δ2H, δ18O, 3H) study has been undertaken to investigate the hydrogeological conditions around the Kusile coal-fired power station located in Mpumalanga province of South Africa. The study area is characterized by mainly weathered and fractured and fractured secondary aquifer systems. Boreholes drilled in both aquifer systems

The Messinian diatomaceous deposits are widely exposed in the Lower Chelif Basin (NW-Algeria). The upper part of the Diatomaceous Formation is intercalated by four diatomaceous beds rich in Zoophycos and Chondrites. Both these traces were produced by the members of endo-benthonic fauna adapted to nutrient exploitation within sediments. In the Diatomaceous Formation, larger dark-coloured Chondrites

A recently drilled exploratory well encompassing over 5 km of Mesozoic and Paleozoic sediments has been studied from the Bhiret Hammou field of the Berkine Basin, Algeria. Geophysical logs and downhole measurements have been integrated to ascertain rock strength, elastic properties, pore pressure and principal in-situ stress magnitudes. Vertical stress has an average 1.02 PSI/feet gradient in the studied

The structure and evolution of the continental crust in the southern part of the Saharan Metacraton (central Africa) is poorly known due to extensive laterite and sediment cover as well as geographic isolation. We report on a series of five crystalline inliers newly discovered near Lake Iro (south-eastern Chad) that offered the opportunity to unravel the nature of the local basement in this area. Two

The Lower Miocene (lower Aquitanian) Hadrukh Formation (30–65 m thick), Al-Lidam area, Eastern Province, Saudi Arabia, was cored to examine sequence development within a non-marine siliciclastic-prone coastal plain in a semi-arid distal foreland setting. Facies are dominated by structureless quartz sands (terrestrial sand-sheets/shrub-coppice dunes or nebkhas), along with gypsiferous/calcareous quartz

Assessment of the flash flood hazard in arid regions is a serious challenge, especially as the climate changes. The Kingdom of Saudi Arabia lies in one of the most arid regions of the world and is known for recurring flash floods in many basins, particularly in the southwest. Many dams have been constructed in some basins; however, flash floods sometimes cause catastrophic damage for mankind and infrastructure

Water resources in the Nile Delta have been subjected to ongoing deterioration in quality and quantity as a result of decreasing Nile water flux, poorly managed groundwater abstraction and anthropogenic activities along the course of the Nile branches and drainage canals. Therefore, a proper assessment of water quality is essential to determine the sources of pollution, if present, and to identify

Quantification and analysis of urban greenness is important in evaluating the role of urban trees in carbon sequestration and regulating land surface temperature of an urban environment. Landsat 8 satellite data was used to evaluate the effects of urban heat island based on land surface temperature (LST) in the affluent suburb of Rosebank in the north and the previously marginalized township of Soweto

The aim of this paper is to clarify the structural evolvement of the study area which lies on pre-shaped substratum tectonic movements related to active faults on the eastern branch of the northern Chotts range, which is part of the southern end of the Atlassic folded structures. However, we propose a new structural model to clarify the junction between the Zemlet Baeida Structure (ZBS), the Jebel

Carbonate rocks represent significant aquifers and reservoir rocks in many parts of the world. In this study, twenty-one carbonate samples collected from the exposed rocks at Batroun and Chekka, northwestern Lebanon, are studied to investigate their lithological characteristics, nannofossil content, and their acoustic and petrophysical properties. Four microfacies are recognized in the studied rocks

The predominantly warm greenhouse climate and high global sea level during the Middle–Late Devonian resulted in fully marine conditions along the northern Gondwana margin, including the Iranian Plate. Over three-hundred meter-thick fossiliferous Middle-to Late Devonian carbonate deposits of the Bahram Formation in the Anarak region (western Central Iran) are composed of dark grey limestone, dolostone

The Anza tracksite, discovered in 2013, is one of several sites in the Western High Atlas of Morocco that contain well-preserved and diverse dinosaur and pterosaur trackways. The occurrence of rare tracks at Anza combined with the stratigraphic position, coastal location, and easy accessibility, have inspired the scientific community, non-governmental organizations, and local inhabitants, to increase

This paper presents the effect of the threshold (S) used in the extraction of the stream network on the morphological characteristics, fractal dimensions, and the hydrologic response of arid basins. Four basins with areas vary between 252 and 2726 km2 is considered as a sample in Makkah Al-Mukarramah region, Saudi Arabia (SA). Three different values of the threshold are used for each basin: 0.5 km2

Groundwater quality and its suitability for drinking and irrigation uses were assessed and multivariate statistical analysis were applied to understand the chemical characteristics of groundwater in the upper part of Luvuvhu sub-catchment in Limpopo, South Africa. The groundwater samples collected during August 2015 (n = 41) and November 2016 (n = 40) were analysed for chemical constituents. The groundwater

This study investigated the source and hydrogeochemical processes responsible for variation in groundwater chemical characteristics in multi-layered aquifers in the central portion of Mekelle Mesozoic Sedimentary Outlier. Groundwater samples from Aynalem and Ilala sub-catchments were collected and analyzed for major and trace elements and stable isotopes (δ2H, δ18O and δ13C). The findings showed significant

The El Gilf El Kiber area is one of the most promising areas for urban growth and reclamation projects in the southwest of Egypt. In the study area, the lithological units vary in age from Precambrian (mainly granite) to Quaternary (mainly sand sediments). The analysis of airborne magnetic and gamma-ray spectrometry data was incorporated into that of the remote sensing data (Landsat-8). The integrated

The present study aims at conducting a detailed reservoir characterization of the Early Cretaceous Bentiu and Abu Gabra formations in Muglad basin which is one of the most prospective hydrocarbon basins in South Kordofan, SW Sudan. This can be achieved through integration between well logging (conventional), petrography (thin sections, and scanning electron microscopy SEM), and core data. Based on

Pliocene coal, clayey coal, and coaly claystone sediments from the Yatağan Formation (Denizli Basin, southwestern Turkey) have been investigated with respect to maceral association, mineralogical composition, n-alkane, isoprenoid and saturated-aromatic biomarker characteristics, and stable isotopes (2H, 13C, 15N, 18O, and 34S). The main purpose of the present study was to determine the hydrocarbon

Glauconite deposits are confined to the Western Desert in Egypt of four different sequences and ages from older to younger include, 1) Lower Cenomanian Bahariya Formation, 2) Lower-Middle Campanian Qusseir Formation, 3) Upper Campanian Duwi Formation, and 4) Lutetian-Bartonian Hamra Formation. Lower Cenomanian, Upper Campanian and Lutetian-Bartonian glauconites occur as pellets, while the Lower-Middle

Geochemical signatures of sedimentary rocks provide reliable proxies that allow a better understanding of sedimentary processes. The geochemical compositions of Awgu Shale (southern Benue Trough) and Enugu Shale (Anambra Basin), south-eastern Nigeria, were investigated to appraise the degree of source area weathering and reconstruct the provenance and paleo-depositional environment. High values of

The Mejerda basin in northwestern Tunisia is located between the Tell and Atlas Mountains and contains structures related to the complicated tectonic history of the study region. The Mejerda contains compressional structures related to the Cenozoic collision between Europe and Africa, and strike-slip faults related to extensional tectonics. As a result of the varied tectonic history, there has been

1813 geothermal gradient measurements from deep wells have been accessed across the African plate. Thermal conductivities based largely on North African sampling and publications have been used to either directly estimate heat flow from these or to calibrate other author's figures to form a standardised dataset. Variations seen in geothermal gradient can be due to lateral changes in lithology and thermal

Tectono-metamorphic evolution within the Cameroonian Yaoundé Group portion of the Central African Orogenic Belt (CAOB) was previously assessed from both metamorphic zircon, garnet and monazite and whole rock dates. In this contribution, and for the first time, robust rutile LA-ICP-MS U–Pb dates were obtained. As rutile is ubiquitous in the low-to high-grade metamorphic rocks therein, our new data allowed

Bioerosional structures and encrusters on a total of 349 bivalves and 209 gastropod shells were studied from Al-Khobar coastline along the Arabian Gulf, Saudi Arabia. Nine ichnospecies belonging to five ichnogenera were identified, namely: Entobia geometrica, Entobia isp., Oichnus paraboloides, Oichnus simplex, Gastrochaenolites dijugus, Gastrochaenolites isp., Caulostrepsis taeniola and Maeandropolydora

In this work, we have investigated a very rich source on valuable elements in mining to valorise and extract the light rare earth elements (REEs) contained in phosphatic mining waste. A detailed characterization was performed for the selected T1 fine dusting (rejection < 0.080 mm) whose mineralogical composition consists mainly of Fluorapatite and Carbonate-Fluorapatite. The detailed chemical composition

The Sefid Kuh Formation (Lower Triassic), in Aghe-Darband tectonic window (NE of Iran) reflects a complex setting as is deducible from intercalation of carbonates with volcanic deposits. A detailed sediment petrological, sequence stratigraphical and geochemical study of this formation was carried out to develop a comprehensive knowledge of the complexity in this formation. Field observations of four

In this paper, we provide insights into the eruptive history and volcano-tectonic evolution of the Paka volcanic complex in a revised stratigraphic framework. We integrate all available 40Ar/39Ar radiometric dates along with field observations, remote sensing data, and the analysis of surface and cutting samples from a 2552 m deep borehole (PK-01). Chemical analyses distinguish basalt, hawaiite, mugearite

This paper presents an integrated study aiming to assess the stratigraphy, sedimentology and paleogeography of the marine and non-marine Tellian, Bejaoua and Fortuna Oligo-Miocene deposits of northern Tunisia. The fossiliferous strata, particularly the glauconite-rich facies, bounded by major unconformities, refine the stratigraphic framework and address the spatio-temporal relationship between marine

This article presents complex paleo-pedoturbation features, preserved in a massive mudstone stratum belonging to a siliciclastic sequence in the upper Eocene. The outcrop of these turbations presents an intricate network of iron oxide in semi tubular forms. The mudstone to which these structures are restricted is lithologically similar to other mudstone beds, below and above it in the sequence. In

The boundaries detection techniques have a great role in enhancing and interpreting the geologic features of magnetic data. In the literature, several filters (THG, AS, TA, NTilt, Theta, TDX, TAHG, LTHG) for identifying the boundaries of the magnetic sources have been suggested. These methods are generally performed based on gradients (vertical and horizontal) of the potential field. This paper presents

A silica undersaturated alkali-olivine basanitic magma intruded the late Paleocene/early Eocene Jafnayn Formation near Muscat. Geochemical analyses indicate that a significant amount of host rock (limestone) was assimilated into the magma. We dated the basanite as 42.7 ± 1.0 Ma (2 sigma error; late Lutetian), using the whole rock 40Ar/39Ar step-wise heating technique. Intrusion occurred in the hanging

The reliable source parameters, the current deformation associated to the earthquakes and the current deformation in relationship with dynamic change of Victoria plate rotation are generally poorly understood owing to the lack of the proper techniques used in the Circum-Tanzania Craton. Therefore, the reliable estimated source parameters and the detail interpretation are very crucial. Here, moment

The irregular echinoid Pygurus meslei Gauthier, 1896 is briefly described from the top part of the Antalo Limestone Formation exposed at Mugher (Blue Nile Basin, Ethiopia). The age of the urchin is constrained by calcareous nannofossils as Upper Tithonian. This is not only the first record of Pygurus meslei Gauthier, 1896 from Ethiopia but also the youngest, worldwide. Very briefly, the African records

Multivariate Statistical techniques have been widely applied in hydrogeology, geochemistry, and hydrology to identify commonalities or differences between large data sets. In this article, Hierarchical Cluster Analysis was performed on recent hydrogeochemical data (27 wells and 8 inland lakes) obtained at Wadi El-Natrun in April 2013 and April 2015. The purpose of this exercise was to understand the

The Campanian-Maastrictian black shales in Egypt comprise a significant part of the worldwide belt of organic-rich shales. These dark-colored shales stretch from the Dakhla in the Western Desert to Safaga area in the east along the Red Sea and are well known in the Middle East and North Africa. A palynological study of these shales hosted mostly in the Duwi and Dakhla formations yields a Campanian

Mineralogical, geochemical and the potentiality of source shale rocks in the Khabour Formation from the Akkas-1 well, western Iraq and the Chia Zinnar section exposed in extreme northern Iraq were studied. Whole rock minerals observed are quartz, feldspars (labradorite, albite and orthoclase), pyrite and rare calcite. The main clay minerals observed in the studied shales are illite, chlorite, kaolinite

Lithium is a metal with increasing demand on the global market mainly for its application in lithium ion batteries for electric vehicles. Ethiopia has potential for lithium resources related to pegmatites and to rift-bound brine deposits. The current research focused on known brine lakes and hot springs in the Danakil Depression and the Main Ethiopian Rift. Lithium contents in water samples from rift-bound

Morphological and geochemical features of both in-rock and alluvial rutile within the Yaoundé Group of the Pan-African Central African Orogenic Belt (CAOB) were assessed, using Laser Ablation Inductively Coupled Plasma Mass Spectrometry (LA-ICP-MS) in order to assess its provenance and condition of formation. Rutile in gneiss and micaschist is fine grained (<0.2 × 0.8 mm) and occurs as euhedral to

The Beni Suef Basin is a rift basin that was formed in the Early Cretaceous in response to the break-up of the Gondwana. The infill consists of a thick Mesozoic–Paleogene succession deposited during two main tectonic phases; the Early Cretaceous syn-rift phase and the Late Cretaceous post-rift phase. The post-rift phase was subsequently subjected to an intense compressional tectonic regime related

Surface and subsurface data are used to illustrate the halokinetic style, structural evolution and kinematics of the Lansarine–Baouala salt structure in the Alpine domain of Tunisia. It corresponds to a salt structure showing a large salt canopy overhanging buried diapir. The salt structure is located along the main fault systems, inherited from the southern Tethyan passive margin periods. The Northern

Detrital zircon U–Pb geochronology and heavy mineral data from four main rivers in coastal southern Tanzania - the Rufiji, Matandu, Mbwemkuru and Ruvuma rivers - are compared with the bedrock geology of their catchment and with data from the Mesozoic strata of the Mandawa Basin, also in coastal Tanzania. The objective is to evaluate the source-to-sink pattern of sedimentation through time, between

A number of micropalaeontological identifications and biostratigraphic interpretations made in a recent paper on mid-Cretaceous of the Iranian Zagros are questionable, and in many cases, can be shown to be erroneous. This in turn casts doubt on correlations and sequence stratigraphic interpretations presented in that paper, as the basis for these is undermined.

This study aimed to analyze the spatial and temporal variations of water quality from 2000 to 2015 in the Grombalia basin aquifer, northern Tunisia. Some physicochemical parameters of collected samples were measured and processed in a GIS environment. Quantitative assessments of their distribution patterns and spatio-temporal variability were performed. Inverse distance weighting (IDW) interpolator

An earthquake catalogue of Egypt is a vital element for seismotectonic and seismic hazard studies using different approaches. Therefore, an updated earthquake catalogue for Egypt and its circumference is collected. The collected earthquake catalogue includes the historical and the instrumental seismic records. Data sets of all earthquakes with a magnitude (M), M ≥ 3, on any magnitude scale mentioned

Heavy metals contamination and sediment quality are parts of the major concerns of the aquatic ecosystem globally. To assess the contamination and sediment quality of the Ondo coastal marine area, a total of seventy two (72) sediment samples were collected from three sampling locations along the coastal region. The concentrations of As, Cd, Cr, Cu, Fe, Ni, Pb and Zn were determined by employing Atomic

Geophysical methods provide important help to investigate geothermal reservoirs. They permit to delineate deep and near surface structuring and to appreciate fluid circulation. In this study, we performed an integrated geophysical study using regional seismic reflection profiles and local Electrical Resistivity Tomography (ERT) data analyses to identify the relation between faults and specific geothermal

The Kwahu-Bombouaka Group of the Voltaian Basin, which defines the northern fringe of the basin, constitutes a significant part of the North East Region of Ghana. Most of the inhabitants in the region depend on groundwater for domestic and irrigation purposes. Therefore, a geochemical characterization and assessment of groundwater quality in the area was carried out using hydrochemical, GIS-based ordinary