The Torak granitic massif: structure, petrology, and mineralogy (Tefedest, Central Hoggar, Algeria)

Ikhlef-Debabha, Faiza; Azzouni-Sekkal, Abla; Benhallou, Amel; Bosch, Delphine; Garrido, Carlos; Babkar, Youcef; Boukhalfa, Zakaria; Aghanbilou, Khaled

doi:10.1007/s12517-020-05662-7

Cited by 4 publications

(1 citation statement)

References 33 publications

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“…The presence of magnesium-rich minerals, like chrysotile and saponite that are observed in this stratum, is not expected and must have resulted from intrusion of migmatite gneiss basement, considering the position of the trial pit in relation to migmatite gneiss basement complex (Fig. 1), as opined by Ikhlef-Debabha et al (2020). Smectites which is a common mineral in granitic The second stratum between 2.5 and 3.5 m depth has similar minerals like the lower stratum except that some primary minerals like annite, potassium alanate, and spinel have been completely transformed to secondary minerals, which is an indication of more weathering, compared to the lower stratum.…”

Section: Results Of Mineralogical Composition Of Overburden Over Granite Basementmentioning

confidence: 81%

Effect of mineralogy on physico-chemical and some geotechnical properties of soils developed over granite, schist, and migmatite gneiss: a case study of Minna, Central Nigeria

et al. 2021

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Results of influence of mineralogy on physico-chemical and some geotechnical properties of soils developed over granite, schist, and migmatite gneiss around Minna in central Nigeria are presented. A region around Minna was studied to obtain the structure and petrography of the rocks. Three trial pits taken to depths of 5.0, 3.5, and 4.0m were dogged within region of granites, schists, and migmatite gneiss rocks, respectively, all of which belong to Basement Complex of northern Nigeria, to study the mineralogical, physico-chemical, and some geotechnical properties of overburden soils over these rocks. In each of the trial pits, soil samples were collected at interval of 0.5m depths to terminal depths of the pits. X-ray diffraction, index properties, and compaction tests were carried out the samples, and the results were analyzed to determine the influence of mineralogy on physico-chemical and some geotechnical properties of the soils. The result showed that rate of weathering is higher in granite rocks, where primary minerals altered to secondary minerals including smectite minerals. This is followed by overburden over schists, which was observed to alter to secondary minerals like illite and kaolinite. Overburden soil over migmatite gneiss did not showed alteration to secondary minerals but conversion of the carbon element to sodium carbonate salt. Higher fines content, cation exchange capacity, and Atterberg limits, recorded from soils developed over granite rocks, probably resulted from the smectite minerals recorded within this profile. The non-plastic nature of soils, on schist rocks, despite presence of secondary minerals, and judging from the low natural moisture content observed within this profile, indicated that the minerals developed under poor drainage condition. It was therefore concluded that mineralogy of overburden soils over basement complexes and the drainage condition during formation affect their geotechnical properties.

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Section: Results Of Mineralogical Composition Of Overburden Over Granite Basementmentioning

confidence: 81%

Effect of mineralogy on physico-chemical and some geotechnical properties of soils developed over granite, schist, and migmatite gneiss: a case study of Minna, Central Nigeria

et al. 2021

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The Tuareg Shield and Trans-Saharan Orogenic Belt of Central Part of Northwest Africa: An Overview

Fowler,

Hamimi

2024

Regional Geology Reviews

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Late Pan-African Murzuq event in the Central Hoggar: Sinistral displacement along the Ounane major shear zone (Gour Oumelalen, Algeria) shown by the magnetic fabric of the Tisselliline pluton

Nouar

Bernard

Liégeois

et al. 2021

Journal of African Earth Sciences

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The Torak granitic massif: structure, petrology, and mineralogy (Tefedest, Central Hoggar, Algeria)

Cited by 4 publications

References 33 publications

Effect of mineralogy on physico-chemical and some geotechnical properties of soils developed over granite, schist, and migmatite gneiss: a case study of Minna, Central Nigeria

Effect of mineralogy on physico-chemical and some geotechnical properties of soils developed over granite, schist, and migmatite gneiss: a case study of Minna, Central Nigeria

The Tuareg Shield and Trans-Saharan Orogenic Belt of Central Part of Northwest Africa: An Overview

Late Pan-African Murzuq event in the Central Hoggar: Sinistral displacement along the Ounane major shear zone (Gour Oumelalen, Algeria) shown by the magnetic fabric of the Tisselliline pluton

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