In this research study, 27 ichnospecies belonging to 18 ichnogenera are described for the first time from the lower Miocene Tiaret Marl Formation (north-western Algeria), which consists of thin-to medium-bedded sandstones and marlstones, representing deep-sea fan facies. The sandstones contain the following ichnotaxa: Cardioichnus isp., cf. Chondrites isp., Ophiomorpha isp., Ophiomorpha annulata, Ophiomorpha

The fluid characterisation and oxygen isotope studies of pegmatites in the Igangan area in southwest Nigeria was carried out to delineate the source and evolution of mineralising fluid, and to determine the crystallisation temperature of the pegmatites that are associated with I-type metaluminous granites. The geochemical analysis was carried out using ICPMS, the mineralogical analysis was carried

Groundwater represents a vital source of freshwater to meet distributed, rapidly rising demands for safe drinking water, irrigation and industry in low-income countries across the tropics. The hydrochemistry of groundwater within deeply weathered crystalline rock aquifer systems that predominate at low latitudes, is determined primarily by long-term biogeochemical weathering of the parent bedrock.

Mining contributes significantly to the GDP of South Africa but it also comes with some adverse impacts on the environment. In this study, remote sensing was used to quantify land-use/cover changes in the Welkom – Virginia Goldfields. The aim was to analyse Landsat images with a 5-year interval from 1988 to 2018 using geospatial indices: Global Environmental Monitoring Index (GEMI), the Normalized

The Doseo depression in the Central African Rift System is characterized by weak inversion, strong strike-slip and rifting, which is an important onshore frontier area for oil and gas exploration in Africa. Based on the data of new wells drilled in recent years, the Lower Cretaceous source rocks in the Doseo depression were investigated comprehensively in respect of organic matter type, abundance,

The exploitation of the Ity gold mine in Ivory Coast will generate tailings that can be considered as potential generators of acid mine drainage (AMD). Various materials such as marble and clay are available around the mine site that could be used as components of an engineered cover for the reclamation of the reactive tailings impoundment. However, it is important to assess the properties of these

Approximating boundaries of causative sources is an important task in potential field interpretation. Many techniques have been proposed for approximating the edges including derivative and phase-based methods. The derivative-based methods cannot equalize the signal amplitudes, and although the phase-based methods do not have this problem, they maybe produce false edges, or the obtained edges are diffused

The petrographic and geochemical compositions of the Campanian-Maastrichtian siliciclastic sediments in the northern Bida Basin, North-central Nigeria were investigated with the aim to determine the petrofacies, their provenance and tectonic settings. The mineral composition of the samples selected from the 10 sub-facies in the study area is characterized by abundant quartz (predominantly of monocrystalline

The invertebrate macrofauna of the Upper Eocene succession at Beni-Suef-Zaafarana Road, north Eastern Desert of Egypt, has been collected for systematic and paleobiogeographical studies from Beni-Suef and Maadi formations. The successions revealed abundant macrofaunal groups with 97 species. Among these species’ groups, 57 gastropods species belonging to 26 families, followed by 27 bivalve species

The Shadegan oil field is one of the fields in the central part of the Dezful Embayment. Little or no geochemical studies have been performed previously in this field. This paper provides valuable information to answer most of the geochemistry ambiguities and issues in this field. Different techniques were used to investigate the genetic types of Asmari and Bangestan reservoirs. Structural characteristics

The olivine melilitites from the southern part of the 6.8 Ma-old Takarindiona volcanic field (Eastern Madagascar) are olivine ± chromite -phyric lavas, with zoned titanaugite, perovskite, melilite, nepheline, monticellite, Ba–Ti-mica and Fe–Ti oxides as microphenocrysts and groundmass phases. The rocks are very primitive, rich in incompatible trace elements (e.g., Ba = 1049 ± 153 ppm, Sr = 1050 ± 167 ppm

The detailed examination of the ostracod faunal content in the Maastrichtian-Paleocene succession of Teneida section, Dakhla Oasis, Western Desert, Egypt, yielded 36 ostracod species and subspecies assigned to 25 genera. Most of the species are recovered from the Maastrichtian-Danian interval. Four groups of taxa are differentiated, Maastrichtian taxa, taxa crossing the K/Pg boundary, early Paleocene

The effects of hydrology, soil structure, and geotechnics on soil loss and gully propagation on the Edda-Afikpo Mesas (southeastern Nigeria) were assessed by field studies, laboratory soil analyses, and GIS modeling.The study was carried out to attribute causality and recommend mitigation measures in the fast degrading settlement. Results of field studies indicate that two areas in the study region

The Adwa – Yeha felsic plugs and domes are chain of towering inverted cone-shaped isolated plugs and circular domes with wide basal diameters and steep-sided, narrow tops. They form contrasting prominent topography from the Trap basalt ridges of the Adwa – Axum - Tekeze volcanic ridge, located just west of the Northern Afar Depression. The felsic plugs and domes are concentrated in the Adwa – Yeha

The Upper Jurassic Jubaila Formation in central Saudi Arabia exhibits laterally coeval environments from the southwest to the northeast. These coeval environments involve inner, mid-, and outer ramps. The inner ramp occurs at the Al Haddar section in the extreme southwest and consists of mixed clastic-carbonate facies and are represented by intercalations of ferruginous calcareous quartz arenite, ferruginous

The Haouz plain aquifer is one of the most important aquifers in Morocco. It is supporting so many activities tightly connected to the local and national socioeconomic development (agriculture, tourism, industry). The recurrent drought the region has been experiencing, had led to a major mobilization of groundwater to meet human needs and socioeconomic objectives. A hydrogeochemical, isotopic and statistical

Coastal lagoons are among the highest biological productive ecosystems; they offer a variety of habitats and feeding grounds for several species. These ecosystems are besmirched by human activities which entail the degradation to their environmental aspects. The purpose of this study is the identification of the grain-size characteristics and the unprecedented recognition of the vegetation cover, so

The Eocene limestone aquifer represents a renewable source of groundwater that can be used to enhance the sustainable agriculture at the eastern desert fringes of El Minia Governorate. The current research aims to investigate quantitatively the physicochemical processes which control the chemical composition of groundwater extracted from the Eocene aquifer using the PHREEQC code. The total dissolved

Detailed field, litho-, bio-, sequence stratigraphy, and paleoenvironmental studies area carried out on the Aqabaat section, Farafra Oasis, Western Desert, Egypt. Lithostratigraphically, the Khoman Formation is here differentiated for the first time into three new distinctive members, which are easily detected at the field: the White Desert (at base), the Gunna (at middle), and the Aqabaat (at top)

Two hundred and seventy four samples, covered the Bahariya sections encountered in 13 boreholes, drilled in three main fields of the General Petroleum Company concession, Abu Gharadig Basin, north Western Desert, were critically investigated for their palynomorphs content. A standard acid-based palynological processing technique is employed to extract the palynomorphs. Fair to moderate diversity and

Within the Aptian-Cenomanian formations of Sinai successions in Egypt, lateral and vertical changes occur in the numerous benthic communities. Microbenthos such as Orbitolina foraminifera and calcareous algae are widespread in the Aptian-Albian deposits in North Sinai, whereas oysters and gastropods are common in the Cenomanian siliciclastic deposits in South Sinai. In order to establish the biostratigraphy

The Palala Shear Zone (PSZ) is a c. 13 km wide part of a vertical, crustal-scale lineament that forms the southern boundary of the polymetamorphic high grade Central Zone of the Limpopo Belt in Southern Africa. We have studied a set of strongly sheared samples of Palala granite, taken at the southern edge of the shear zone at the Palala River transect, in order to determine the deformation patterns

An integrated study using gravity, 2D seismic, well logs, and geological data in the eastern Sirt Basin is presented in this research focussing on the Lower Cretaceous Sarir Sandstone which is the most important oil reservoir in the study area. Interpretation of basement architecture shows individual blocks are named in the present paper A, B and C, whilst depocentre represents the most pronounced

The northern boundary of the Central High Atlas was affected by a transgression during the Aptian that reached the junction zone between the Middle and the High Atlas. In this sector (Naour-Aghbala) which corresponds to the presumed closure zone of this Aptian Atlantic marine trough, the sedimentary record reveals a strong dependence on the regional structural framework. The Barremian continental sedimentation

This work uses aeromagnetic, satellite gravity, and ground gravity data to image the thermal and crustal structures beneath the NE-trending Paleozoic - Mesozoic Luangwa – Lukusashi – Luano (LLL) rift in southeastern Zambia. This rift extends between the Precambrian Irumide metacraton in the northwest and the Niassa craton to the southeast and is partially controlled by the NE-trending Mwembeshi suture

Whole rock geochemistry was conducted on shales of the Mamfe Basin (West Africa) to identify their source rock, tectonic environment, paleoweathering and maturity. Binary diagrams of Th/Cr, La/Sc, Th/Sc, Zr vs TiO2 AL2O3 vs TiO2, and, Cr/Th, designate that the shales originated from a felsic rock source. The felsic composition of the shale is also shown by its abundance LREE, flatter HREE model, and

The appearing of clay (conductive) layer(s) at different depths of the lithological succession has been widely observed in the Upper Egypt district. This phenomenon has dramatic effects on the resultant depth of investigation of any geoelectrical survey of such environment. Study the effect of such layers on estimating Depth of Investigation (DOI) is the main goal of this article. Because the reliability

Clay deposits are abundant within the Lower Benue Trough (LBT) of Nigeria. The chemical compositions and other attributes of some of these deposits, aside their uses, have not been extensively studied and documented. These natural resources are important in the understanding of the geological processes with reference to the source area-weathering, provenance and tectonic setting of the precursors,

New MW–ML magnitude relations valid for the periods January 1971–March 1997, April 1997–September 2012 and October 2012–present are presented for South Africa. Three MW–ML relations were derived for the respective periods by applying a general orthogonal regression using 85 mining-related and tectonic events. Moment magnitudes (MW) were calculated using spectral analysis of the vertical component seismograms

Despite the vast extent of the Arabian Nubian Shield (ANS) and its growth during the renowned Neoproterzoic dramatic climatic changes (Snowball Earth Events), only few records of snowball events are identified among its rocks. Here we present geological and geochemical evidence that the northern part of the Arabian Nubian Shield (Um Zariq Formation (UZF), southeast Sinai, Egypt) witnessed global snowball

The Kalahari Karoo Basin of Botswana is an intracratonic basin developed in south-central Gondwana and is filled with Upper Carboniferous–Lower Jurassic Karoo Supergroup volcano-sedimentary units. The Karoo Supergroup units are unconformably covered by the Cretaceous to recent Kalahari Group. The Upper Karoo Supergroup in the Central Kalahari Karoo Sub-Basin of Botswana consists of the lacustrine sediments

This work investigates a 3400m thick Tertiary succession from the prolific Gabo hydrocarbon field in the Niger Delta and presents a well-scale geomechanical model to address the pore pressure, borehole stability and fault slip potential attributes. The Tertiray stratigraphy is dominated by cyclic clastic sedimentation and it produces hydrocarbon from the Eocene Agbada Formation. An average vertical

The Takelsa phreatic aquifer currently shows stress signs and the contamination risk of groundwater by different chemical elements and pesticides is a likely concern. Here we assessed the aquifer vulnerability using the Susceptibility Index (SI) method, considered as a specific vulnerability method that takes into consideration the impact of land uses chemical fertilizers, anthropogenic activities

Improving exploration and development techniques of fossil fuels are essential for continuous reserves development. Although there are many oil discoveries in the Razzak Area (North Western Desert, Egypt), there are also many dry wells. Therefore, the tectonic setting and reservoirs characterization of the study area has to be fully understood. Twenty 2D highly filtered stack zero-phase seismic sections

The investigation of lipid biomarkers in sediments deposited during the Holocene in the Lagoon of Tunis, located at the southern edge of the Mediterranean Sea, revealed two important hopanoid biomarkers: 2-methylhopaneand 22,29,30 trisnorhop-17(21)-ene. These compounds are considered of special interest because they reveal information about climate conditions during the Late Holocene sediment deposition

An integrated field, petrological, as well as major and trace element geochemical study of a suite of basaltic and associated rhyolitic rocks of the Alaje Formation from the continental flood basalts of the Aiba area of northern Ethiopia has been conducted. The study constrained the geochemical and petrogenetic association of the basaltic and rhyolitic rocks. The results show that the Alaje Formation

Discriminating the argillaceous sandstone reservoirs into several hydraulic flow units (HFUs) is a useful reservoir zonation technique. This study introduces a statistical method for analyzing petrophysical data sets, including borehole-logs and core data, to discriminate the main Triassic gas-producing argillaceous sandstone reservoirs in Hassi R'Mel Northern Field in Algeria into some HFUs. These

Calcareous nannofossils are a valuable proxy commonly used in biostratigraphic and paleoenvironmental studies. A high-resolution biostratigraphic analysis of the Pabdeh Formation and transitional interval was undertaken in one of the oilfields, located in the Strait of Hormuz in Iran. The stratigraphic interval studied includes marl, argillaceous limestones and interlayers of limestone and shale. In

The Tihamat-Asir area is located in southwest Saudi Arabia between the Asir Mountains and the Red Sea coast. Herein, the Tihamat-Asir area aeromagnetic data are re-interpreted to explain the magmatic activity and related structural interaction between extensional normal and transfer strike-slip faulting. The magnetic anomaly structural interpretation indicates that faulting and related magmatic activities

The recently constructed Lokoja-Abuja highway and a quarry which cut through the Patti Formation, provided opportunity for the field study and sampling of the exposed ironstone interbeds within the carbonaceous shales and clays in Ahoko-Idu axis of the southern Bida Basin, Nigeria. The origin and paleoenvironmental significance of the ferruginous intervals were examined in this paper. Investigation

We used 2D and pseudo-3D induced polarization (IP) in conjunction with electrical resistivity imaging (ERI) data inversion to identify and characterize potential zones of gold mineralization in Phitshane Molopo area. Reports on historic exploration suggest that gold mineralization is associated with quartz and/or carbonate veins that cut across the banded iron formations. The 2D IP/ERI measurements

The position of Sinai Peninsula as an area of transit from Africa to Asia and vice-versa, is so strongly reflected on its importance on the projects of sustainable development in Egypt. Wadi El-Arish basin, largest drainage system in Sinai Peninsula, exhibits variable morphologic features due to the impact of the local lithologic, tectonic, topographic features and arid climatic conditions with intermittent

Syn-tectonic 530.6 ± 0.8 Ma pegmatites and aplites from the Donkerhoek batholith in the Damara orogen (Namibia) are moderately to strongly peraluminous, ferroan, alkalic to calc-alkalic leucogranites. Major and trace element variations and strongly fractionated REE patterns with positive Eu anomalies indicate that the leucogranites represent highly fractionated melts that accumulated or retained feldspar

The Babouri-Figuil and Mayo Oulo-Lere basins belong to the intra-continental basins which are linked to the opening of Southern Atlantic Ocean. The sediments from these Basins were investigated to infer their provenance and conditions of sedimentation, using major and trace elements geochemistry of the fine facies. The main criteria for samples selection was color and hence twelve representative samples

The Oued Gueniche plain is located in the northeastern Tunisia. It is a part of the Bizerte Neogene molassic basin, developed at the front of the Alpine chain (The Maghrebides). The subsurface structure of this area is not enough explored and was subject of controversial interpretations. Gravity and seismic data acquired in the northeast of Tunisia were used to specify the subsurface structural configuration

The Albian-Santonian sedimentary sequence in the Ndeaboh-Nenwe area of Enugu, Southern Benue Trough, were analysed for foraminifera and integrated with ostracod and palynofacies analyses to comprehensively appraise the age and depositional environment of the sediments. This is paramount since the studied formations have intermittent series of non-marine sedimentary influences throughout the basin.

The Middle Eocene sedimentary succession in Abat Basin contains a thick mixed siliciclastic and carbonate sequence belonging to the upper member of the Musawa Formation. Over 300 m thick deltaic sediments of the Bartonian to Priabonian upper member of the Musawa Formation show two main facies successions over ten km distance, grading from a proximal delta-plain to a distal delta-front succession. Four

The geodynamic significance of Adamawa Yade Domain in Cameroon is still highly debated. This paper presents mineralogical, geochemical, zircon U–Pb age and Hf isotopic data for NNE-trending garnet-bearing pyroxeno-amphibolite (GPAm) and amphibolite (Am) bodies exposed in the Ititin area located at the Northwestern border of the Adamawa-Yadé domain in Cameroon. The GPAm and Am were dated by SIMS U–Pb

The Eastern Pontides Orogenic Belt (EPOB) as a well-preserved ancient magmatic arc situated in the eastern part of the Sakarya Zone and has key importance to allow for proper reconstruction of the geodynamic evolution of the region. The region accepted as important part of Alpine–Himalayan Belt comprises of many granitoids of the Late Cretaceous age. This paper presents new mineral chemistry, bulk-rock

This paper documents the detailed sedimentology and stratigraphic evolution of the Sandy members of the Pindiga Formation. Good understanding of this succession is relevant to resource exploration and exploitation in the frontier Gongola Sub-basin of the Northern Benue Trough and similar Cretaceous strata in general. Detailed facies analysis based on examination of twelve well exposed outcrops revealed

Submarine fan deposits which constitute the remnants of Neo-Tethys are widely observed throughout the Bitlis–Zagros Suture Belt. Most of these deposits are located in the Arabian-Eurasian collision zone and have been intensively deformed due to ongoing tectonic activity. In this study, the depositional characteristics and preservation processes of the undeformed, Lower Miocene Görendağı Submarine Fan

Phosphate minerals derive from marine sedimentary rocks and can be used as soil and water remediation agents. Phosphate deposits are abundant in Morocco. These rocks have important surface properties allowing a good retention of heavy metals (Pb2+, Cd2+, Cu2+, Zn2+, Cr3+, Cr6+) and organic micropollutants (phenol, pyridine, dyes and drugs), which has been well described herein. A retention mechanism

Resulting from lithological conditions and anthropogenic activities as fertilizers use and wastewater discharge, high concentrations of chloride ions were revealed in both surface water and groundwater in Lower Soummam valley, situated in the North-Eastern of Algeria. Using geological, hydrogeological and geochemical data, a conceptual model was designed in order to improve understanding of chloride

The south-central Moroccan Jebilet Massif comprises several occurrences of late Paleozoic continental red-beds. These deposits have been interpreted to be of Pennsylvanian-Permian age based on lithofacies. Any other reliable age constraint for these rocks was hitherto lacking. Recent fieldwork in late Paleozoic red-beds of the Koudiat El Hamra - Haiane Basin, near the center of the Jebilet Massif,