Showing papers in "Journal of African Earth Sciences in 2014"

TL;DR: This work presents a comprehensive review of confirmed, proposed (possible) and disproven impact structures in Africa.

TL;DR: In this paper, the authors summarized and integrated available U-Pb geochronology of the Precambrian shield of Madagascar into a synthesis of the region's geological history.

TL;DR: A review of the main lithotypes and other characteristics of granite-greenstone belt geology can be found in this paper, where contrasting views have been expressed on the nature, history and origin of many of the rock types and events in Archaean terranes.

TL;DR: In this article, a comprehensive dataset of 451 shallow groundwater samples were collected in 2011 and 2012 and onsite field measurements of the total dissolved solids (TDS), electric conductivity (EC), pH, temperature, as well as lab-based ionic composition of the major and trace components were performed.

TL;DR: In this paper, a reassembly of the Precambrian fragments of central Gondwana is presented that is a refinement of a tight reassembly published earlier, where fragments are matched with conjugate sides parallel as far as possible and at a distance of 60-120 km from each other.

TL;DR: In this article, the authors proposed the following distinct orogenic events in the Anti-Atlas Mountains of Morocco: Iriri-Tichibanine orogeny (760-700 ǫ), Bou Azzer orogenys (680-640 ǔ), and the WACadomian orogenies (620-555 ǒ).

TL;DR: The primary purpose of this study is to examine the applicability and capability of RVM and SVM models for predicting the UCS of volcanic rocks from NE Turkey and comparing its performance with ANN models.

TL;DR: In this paper, the authors reassess the geodynamic context close to the Congo craton during the pre-collisional period of the Pan-African orogeny from whole-rock major and trace element compositions and isotopic data obtained in the westward extension of the Yaounde series (Boumnyebel area, Cameroon).

TL;DR: In this article, the age of the Bou Azzer-el-Graara onlier has been estimated using SHRIMP U-Pb on zircons, and the results suggest the existence of three distinct orogenic events during Cryogenian times.

TL;DR: In this paper, the authors investigated the sources of groundwater contamination and the hydrodynamic functioning of the multilayer aquifer system in the mining Gafsa basin (Southwestern Tunisia).

TL;DR: In this article, a new slope susceptibility evaluation parameter (SSEP) rating scheme is presented, which is developed as an expert evaluation approach for landslide hazard zonation, by considering intrinsic and external triggering parameters that are responsible for slope instability.

TL;DR: In the last two decades, great progress has been made in the geochronological, chrono- and chemostratigraphic control of the Neoproterozoic and Cambrian from the Anti-Atlas Ranges and the Ouzellagh promontory (High Atlas) as mentioned in this paper.

TL;DR: In this article, a comparison of sedimentary, volcanic and geodynamic evolution is made in the late Neoproterozoic (Pan-African and Cadomian) belts and Cambrian rifts trying to solve the apparent diachronous (SW-NE-trending) propagation of an early Palaeozoic rifting regime that finally led to the opening of the Rheic Ocean.

TL;DR: In this paper, trace element compositions, rare earth elements (REEs) and radiogenic Nd-Sr isotope analyses of Cretaceous to recent sediments of the Tarfaya basin, SW Morocco, in order to identify tectonic setting, source rocks composition and sediments provenance.

TL;DR: In this article, the post-Pan-African evolution of the northern border of the West African Craton is largely controlled by the remobilisation of Late Neoproterozoic basement faults.

TL;DR: In this paper, chemical analyses of soil and stream sediment samples included elements most of which are internationally considered as dangerous for human health (As, Cd, Co, Cr, Cu, Fe, Ni, Pb, S, Se and Zn).

TL;DR: In this article, the authors describe the hydrological processes in the Korba coastal plain using hydrochemical data, correlation matrices and factor analysis to provide evidence of salinization processes.

TL;DR: In this paper, simulations with a two-dimensional cross-sectional model have been done to investigate the response of the fresh/salt water interface to coastal pumping, and the results of the simulations can be used to formulate recommendations when drilling new wells and for a better monitoring of the salinisation process along the coast.

TL;DR: In this paper, the authors present the results of 38 new apatite fission track analyses from the Damara region of northern Namibia and integrate these new data with their previous results that were focused on specific regions or sections only to comprehensively document the thermo-tectonic history of this region since continental break-up in the Early Cretaceous.

TL;DR: In this article, a lineament extraction by LINE module on high-resolution ASTER imagery provides efficient data for potential dilation loci, and the reliability of mineral indices extracted from the ASTER band ratios for identification of possibly mineralized alteration zones associated with NE-trending shear zones.

TL;DR: In this article, a data matrix comprising 198 macrobenthic taxa in 138 samples collected from four sections identified nine associations and three assemblages, interpreted to be representative of their original environment.

TL;DR: In this paper, the intertrappean beds are often lignitiferous and yield recurrent floras and faunas, sometimes represented by endemic mammals, such as the Deinotheriidae and Gomphoteriidae.

TL;DR: A recent field mapping program of the Ediacaran Ouarzazate Group in these areas allows to distinguish three principal volcanic sequences as discussed by the authors, including the Adrar-n-Takoucht Formation, Tadoughast Formation and Fajjoud Formation.

TL;DR: In this article, the concentrations of arsenic (As), copper (Cu), cobalt (Co), lead (Pb) and zinc (Zn) in washed leaves and washed and peeled tubers of cassava (Manihot esculenta Crantz, Euphorbiaceae) growing on uncontaminated and contaminated soils of the Zambian Copperbelt mining district were analyzed.

TL;DR: In this article, a study conducted in Abi area of the Ikom-Mamfe Embayment with the objective of estimating aquifer parameters from 30 evenly distributed vertical electrical soundings using the Schlumberger configuration and hydrogeologic measurements from 28 boreholes within the area as an alternative way of generating an initial data for groundwater characterisation and quality assessment in the area.

TL;DR: In this paper, the authors present a discussion of the merits and perceived weaknesses of the current GSSP definition and propose solutions to the problems of the GSSP in order to facilitate global correlation of the Cambrian base and ensure nomenclatural stability to the extent possible.

TL;DR: In this article, two Mesozoic sandstone samples from three different sedimentary successions along the Western-Central Mediterranean Alpine Chains (Betic Cordillera, Rif Chain and Calabria-Peloritani Arc) were chemically analyzed to characterize their composition and the degree of weathering in the source area(s).

TL;DR: Recently acquired high-resolution aeromagnetic data over the Cretaceous middle Benue Trough of Nigeria have been analysed employing various edgeenhancement (magnetic derivative) methods: vertical derivatives, total horizontal derivative, analytic signal, and total horizontal derivatives of tilt derivative.

TL;DR: In this article, a detailed study of the rare-earth elements (REE) and high-field-strength elements (HFSE)-bearing granitic dykes was performed in the Cenozoic Ambohimirahavavy alkaline complex.

TL;DR: In this paper, a review of hot shales in southern Tunisia is presented, where the Gamma Ray (GR), Neutron Porosity (ΦN), deep Resistivity (Rt) and Bulk Density (ρb) logs were used to model bulk mineralogy and lithology.