Structural modeling of the hidden parts of a Paleozoic belt: Insights from gravity and aeromagnetic data (Tadla Basin and Phosphates Plateau, Morocco)

Bba, Abdellah Nait; Boujamaoui, Mustapha; Amiri, Adnen; Hejja, Younes; Rezouki, Ibtissam; Baïdder, Lahssen; Inoubli, Mohamed Hédi; Manar, Ahmed; Jabour, Haddou

doi:10.1016/j.jafrearsci.2018.09.007

Cited by 22 publications

(10 citation statements)

References 55 publications

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“…Currently, aeromagnetic and gravimetric surveying data analyses are used worldwide for regional geological reconnaissance and metallogenic and mining research (Abderbi & Khattach, 2011;Bouya et al, 2013). In Morocco, aeromagnetic and gravity surveying data, unfortunately, were limited to interpretations and punctual analyses (El Gout et al, 2009Abderbi & Khattach, 2011;Amar et al, 2012Amar et al, , 2015Bouya et al, 2013;Boutirame et al, 2019;Nait Bba et al, 2019). Chopin et al, 2014;Hoepffner et al, 2005;Michard et al, 2010;Michard et al, 2008).…”

Section: Introductionmentioning

confidence: 99%

Exploiting Aeromagnetic and Gravity Data Interpretation to Delineate Massif Deposits of Rehamna Area (Western Meseta-Morocco)

Benyas

Aarab

Qarbous³

et al. 2021

IGJ

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The analysis of the magnetic signatures and gravity gradient values of the Rehamna Massif south of the Moroccan Western Meseta by using Geosoft Oasis Montaj 7.0.1 software, allowed us to detect several useful anomalies to be exploited and which are related to magmatic bodies and structural features within the study area. These data were analyzed by applying several techniques, including the horizontal gradient filters combined with the first vertical derivative. Subsurface structures; such as geological boundaries, faults, dykes and folds, were visualized as lineaments on geophysical maps, then results were compared with structural features provided by previous studies in the region. Thus, the Rehamna Massif structural map shows sets of linear features which may represent faults or boundaries of geological structures, which can be either faults or boundaries of geological structures, and they are mostly oriented in the directions: N-S, NNE-SSW, NE-SW, E-W with the predominance of the NNE-SSW to NE-SW directions. In addition, the super position of the minerals bearing beds or formations were distinguished from gravity and magnetic data processing results. Some of the recognized anomalies are related to the existence of precious metals which belong to the granitic bodies within the study area.

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Section: Introductionmentioning

confidence: 99%

Exploiting Aeromagnetic and Gravity Data Interpretation to Delineate Massif Deposits of Rehamna Area (Western Meseta-Morocco)

Benyas

Aarab

Qarbous³

et al. 2021

IGJ

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“…This field has been used to calculate the residual magnetic field which is only the subtraction of the IGRF from the total field. As a result, the pole reduction was done in order to situate the anomalies directly above the corresponding geological bodies and to reduce the effect of magnetic variations caused by the dipole magnetic field (Bba et al 2019), with an inclination of 46 ° N and a declination of −7.40 ° W. Remember that to simplify the magnetic anomaly Baranov (1957), Baranov and Naudy (1964) suggested a mathematical approach known as pole reduction, which is calculated in the frequency domain (Baranov 1957; Baranov and Naudy 1964) using the filter operator (Grant 1972). For data interpolation, we used minimum curvature gridding method (O'Connell et al 2005).…”

Section: Methodsmentioning

confidence: 99%

Gravity and magnetic data processing further constrained inversion for 3D modelling and tonnage calculation

Soulaimani

Chakiri

Manar

et al. 2020

Applied Earth Science

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Geophysical data processing further constrained inversion is evolving progressively prevalent in geoscience domains for three-dimensional modelling and resources evaluation. The process is based on the magnetic and gravity data processing further constrained Cartesian cut cell inversion to discern the maximum of information about HAJJAR deposit in order to calculate its tonnage. This article exhibits data and inversion processing technique for tonnage calculation based on an important geophysical magnetic and gravity surveys of defined extent of HAJJAR region, which presents a great benefit to save time and have accurate and realistic results to a same case. Otherwise, the potential-field signatures of what are regarded to be geologically expressive features are sought within the magnetic and gravity data. The preliminary stage for tonnage calculation was residual anomaly processing and depth estimation of the orebody using spectral analysis method. However, progressing towards extracting the deposit signature, the used method leads to invest the gravity signature of the orebody in adequacy with the magnetic signature. Finally, the tonnage calculation was developed by constrained Cartesian cut cell inversion using Voxi Earth Modelling TM . Obtained results were very important, given their qualitative and quantitative accuracy, which give an added value for the governmental geological and geophysical survey.

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“…Lutetian (47.8 My) strata mark the end of the phosphatic series. It is characterized by a fossiliferous marly limestone slab, known as the Thersitae slab [7,[13][14][15][16].…”

Section: Geological and Hydrogeological Context Of The Study Areasmentioning

confidence: 99%

Geophysical Prospecting for Groundwater Resources in Phosphate Deposits (Morocco)

et al. 2020

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The Moroccan phosphate deposits are the largest in the world. Phosphatic layers are extracted in open-pit mines mainly in the sedimentary basins of Gantour and Ouled Abdoun in Central Morocco. The purpose of this study was to prospect and evaluate the water potential of aquifers incorporated in the phosphatic series using the following geophysical methods: Magnetic resonance sounding (MRS), electrical resistivity tomography (ERT), time-domain electromagnetics (TDEM), and frequency-domain electromagnetics (FDEM). The objective was, on the one hand, to contribute to the success of the drinking water supply program in rural areas around mining sites, and on the other hand, to delimit flooded layers in the phosphatic series to predict the necessary mining design for their extraction. The use of geophysical methods made it possible to stratigraphically locate the most important aquifers of the phosphatic series. Their hydraulic parameters can be evaluated using the MRS method while the mapping of their recharge areas is possible through FDEM surveys. The results obtained in two selected experimental zones in the mining sites of Youssoufia and Khouribga are discussed in this paper. The application of the implemented approach to large phosphate mines is in progress in partnership with the mining industry.

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Structural modeling of the hidden parts of a Paleozoic belt: Insights from gravity and aeromagnetic data (Tadla Basin and Phosphates Plateau, Morocco)

Cited by 22 publications

References 55 publications

Exploiting Aeromagnetic and Gravity Data Interpretation to Delineate Massif Deposits of Rehamna Area (Western Meseta-Morocco)

Exploiting Aeromagnetic and Gravity Data Interpretation to Delineate Massif Deposits of Rehamna Area (Western Meseta-Morocco)

Gravity and magnetic data processing further constrained inversion for 3D modelling and tonnage calculation

Geophysical Prospecting for Groundwater Resources in Phosphate Deposits (Morocco)

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