Autunian age constrained by fold tests for paleomagnetic data from the Mezarif and Abadla basins (Algeria)

Merabet, N.; Henry, B.; Kherroubi, A.; Maouche, Saïd

doi:10.1016/j.jafrearsci.2005.10.002

Cited by 7 publications

(3 citation statements)

References 26 publications

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“…Fold test (Derder et al 2001b) and evolution of palaeomagnetic direction according to formation age shows that this ChRM is the primary magnetization. That is confirmed for the Stephano‐Autunian Formation by similar directions, dated by a fold test, obtained in the Bechar–Mezarif basins (Merabet et al 2003). However, in some Bashkirian and Moscovian samples (Henry et al 1992; Derder et al 2001a,b), different directions can be observed.…”

Section: Palaeomagnetic Analysissupporting

confidence: 75%

Chemical remagnetizations in the Illizi basin (Saharan craton, Algeria) and their acquisition process

Henry

Merabet

Derder

et al. 2004

Geophysical Journal International

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S U M M A R YDuring remagnetization, chemical changes limited to moderate grain growth from pre-existing single domain (SD) grains do not modify the palaeomagnetic direction carried by these grains. Palaeomagnetic direction from new SD grains, on the contrary, is that of the magnetic field during remagnetization. The resulting direction becomes intermediate between the directions carried by previous and new SD grains, as it appears often in case of a partial magnetic overprint. If the growth of pre-existing grains is more important, these grains become large multidomain (MD) and loose the primary magnetization. Stable magnetization is then only related to the new SD grains, which carry the total remagnetization. In the Illizi basin (Saharan platform), these different cases of partial or total magnetic overprint have been observed, resulting from palaeomagnetic studies of different Palaeozoic and Mesozoic formations.

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Section: Palaeomagnetic Analysissupporting

confidence: 75%

Chemical remagnetizations in the Illizi basin (Saharan craton, Algeria) and their acquisition process

Henry

Merabet

Derder

et al. 2004

Geophysical Journal International

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“… a Means are recalculated from McElhinny et al [2003] using the method of McFadden and McElhinny [1995] for combining groups of poles by including recently published poles of Anderson et al [2003], Bachtadse et al [2002], Derder et al [2001a, 2001b, 2001c, 2006, 2009]], Gilder et al [2003], Merabet et al [2005], Rakotosolofo et al [2006]; m is the number of poles; N is total number of sites; k is the estimate of Fisher [1953] precision; A95 is the radius of circle of 95% confidence about the mean pole position. Ages are based on the Geologic Timescale 2004 [ Gradstein et al , 2004].…”

Section: Paleomagnetic Datamentioning

confidence: 99%

Unraveling the New England orocline, east Gondwana accretionary margin

2011

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[1] The New England orocline lies within the Eastern Australian segment of the Terra Australis accretionary orogen and developed during the late Paleozoic to early Mesozoic Gondwanide Orogeny (310-230 Ma) that extended along the Pacific margin of the Gondwana supercontinent. The orocline deformed a pre-Permian arc assemblage consisting of a western magmatic arc, an adjoining forearc basin and an eastern subduction complex. The orocline is doubly vergent with the southern and northern segments displaying counter-clockwise and clockwise rotation, respectively, and this has led to contrasting models of formation. We resolve these conflicting models with one that involves buckling of the arc system about a vertical axis during progressive northward translation of the southern segment of the arc system against the northern segment, which is pinned relative to cratonic Gondwana. Paleomagnetic data are consistent with this model and show that an alternative model involving southward motion of the northern segment relative to the southern segment and cratonic Gondwana is not permissible. The timing of the final stage of orocline formation (∼270-265 Ma) overlaps with a major gap in magmatic activity along this segment of the Gondwana margin, suggesting that northward motion and orocline formation were driven by a change from orthogonal to oblique convergence and coupling between the Gondwana and Pacific plates.

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“…Another study by Bouchoucha et al [2] in the same year presented a research on the mineralogy and geochemistry of polymetallic mineralization in the Ain Barbar deposit in the north-eastern Algeria. Merabet and Bouhlel in 2020 [3] provided an overview of the mineral resources in Algeria and highlighted the importance of polymetallic mineralization in the country's economy. In 2021, Bouabdellah, et al [4] discussed the potential for mineral exploration in Neogene sedimentary basins in Algeria, including those that host polymetallic mineralization.…”

Section: Introductionmentioning

confidence: 99%

Polymetallic mineralization hosted in the Neogene sedimentary strata of the Algerian Tellian Range: A comprehensive overview

Zighmi¹,

Zahri²,

Hadji³

et al. 2023

Min. miner. depos.

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Purpose. In the electronics industry, stibium (Sb) is an important element used in the development of silicon-based devices. The metallogenic district of Guelma, known for its polymetallic antimony mineralization, is not currently exploited. The research purpose is to characterize the minerals and gang formations of antimony elements required as dopants during the growth of monocrystalline silicon. Methods. The research methods include detailed geological mapping and sampling, XRD mineralogical identification, XRF geo-chemical analysis, and atomic absorption spectrophotometry. Findings. The results obtained prove that Sb mineralization is the youngest in the North-East of Algeria, since it is hosted in the dolomitized lacustrine limestone of the Mio-Plio-Quaternary. The mineralization has been deposited by the replacement and filling open spaces. A supergene alteration of the Nadorite mineral has led to the antimony sulfides appearance. Originality. Unique mineral species of the world have been identified: Nadorite in Jebel Nador, Flajolotite in Jebel Heimel, valentinite in Jebel Senza, senarmontite in Jebel Hammimat, and cervantite near Aïn Kerma. The Ham-man N’Baïls deposits still contain significant reserves of Zn, Sb, and Pb. Practical implications. With the help of this study, we have answered questions related to the origin of the mineralizing fluids responsible for the formation of deposits. In addition to the epigenetic nature of the mineralization with the formation of unique and rare minerals throughout the world, the presence of gold in this region has been proven by chemical analysis.

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Autunian age constrained by fold tests for paleomagnetic data from the Mezarif and Abadla basins (Algeria)

Cited by 7 publications

References 26 publications

Chemical remagnetizations in the Illizi basin (Saharan craton, Algeria) and their acquisition process

Chemical remagnetizations in the Illizi basin (Saharan craton, Algeria) and their acquisition process

Unraveling the New England orocline, east Gondwana accretionary margin

Polymetallic mineralization hosted in the Neogene sedimentary strata of the Algerian Tellian Range: A comprehensive overview

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