Mineralization of the In Ateï gold district (Central Hoggar, South Algeria)
DOI:
https://doi.org/10.3989/egeol.45038.1054Keywords:
In Abeggui, Gold mineralization, Tourmaline quartz veins, Two golden generations, Gabbro massif, Aplite dykeAbstract
The In Ateï gold district is located in the eastern part of the Laouni “LATEA” terrane (acronym of Laouni, Azrou-n-Fad, Tefedeset, Egéré-Aleksod) (central Hoggar, southern Algeria). In fact, during the post-collision period of the Pan-African orogeny (600 and 570 Ma), this microcontinent was partly destabilized until it corresponded to a meta-craton.
The In Abeggui gold deposit is part of the In Ateï district and is located 210 km southeast of the town of Tamanrasset. It is located in a large gabbro-diorite massif of the Neoproterozoic volcano-sedimentary series.
The In Abeggui deposit shows two morphological types of gold veins and a mineral paragenesis different from the rest of the Hoggar.
In the In Abeggui deposit, a biotite granite pluton comprising contemporary gabbro-diorite bodies is intrusive in the Neoproterozoic volcano-sedimentary series. The mineralized veins are mainly hosted in one of these mafic bodies. Numerous dykes of mafic and felsic rocks cut both the biotite granite and the gabbro-diorite massif. Felsic dikes include granites, microgranites, pink aplo-pegmatites and aplites.
The main objective of this work is to study the types of gold mineralization expressed in the Laouni terrane (central Hoggar) based more particularly on those of the In Atei region.
Two generations of gold-bearing quartz from the In Abeggui deposit can be distinguished: Veins 1: Tourmaline quartz veins predominantly N30° embedded in the gabbro massif, and Veins 2: Stockwork and quartz veinlets, hosted in aplite dykes covering the vein system1
Downloads
References
Aïssa, D. E., Talbi, M., Lazouni, A., & Kesraoui, M. (2002). Les minéralisations aurifères du Hoggar (Sud Algérien) et leurs relations avec les zones de cisaillements lithosphériques. Bullletin du Service Geologique de l'Algérie, 13(2), 93-115.
Aïssa, D. E., Kesraoui, M., Marignac, C. H., & Semiani, A. (2005). Des minéralisations en or «orogénique» et en métaux rares du Hoggar. 1er Séminaire Internationale de Géologie et de Métallogénie du Hoggar et des Eglab, Tamanrasset, 8-9.
Aïssa, D. E., Marignac, C. H., Kesraoui, M., Nedjari, S., Boutrika, R. & Guessoum, N. (2006). Relations entre les minéralisations aurifères et à métaux rares éo-cambriennes du Hoggar. Fourth meeting of IGCP485-USTHB, Alger, Algeria.
Aïssa, D. E., Boutrika, R., Guessoum, N., & Marignac, C. H. (2012). Late Pan-Africain Gold Mineralization in the Laouni Terrane (Central Hoggar, Algeria): Is It linked to Late Felsic Magmatism [Conference presentation]. GEOFLUIDS VII - International Conference, Rueil-Malmaison, France.
Aissa, D.E., & Marignac, C. H. (2017). Controls on gold deposits in Hoggar, Tuareg Shield (Southern Algeria). Journal of African Earth Sciences, 127, 136-145. https://doi.org/10.1016/j.jafrearsci.2016.09.002
Alexandrov, V. & Mirochniko, L. (1972). Rapport sur les résultats des recherches géologiques menées sur le gisement d'In-Abeggui et dans sa région [Unpublished report]. SONAREM.
Aexandrov, V., & Bryzgalov, A. (1973). Rapport sur les travaux de prospection et de reconnaissance exécutés sur le gisement d'In Abeggui et dans sa région [Unpublished report]. SONAREM.
Araújo, M. N. C., Alves da Silva, F. C., Jardim de Sá, E. F. & Holcombe, R. J. (2002). Geometry and structural control of gold vein mineralizations in the Seridó Belt, northeastern Brazil. Journal of South American Earth Sciences, 15, 337-348. https://doi.org/10.1016/S0895-9811(02)00040-8
Black, R., Latouche, L., Liégeois, J. P., Caby, R. & Bertrand, J. M. L. (1994). Pan-African displaced terranes in the Tuareg shield (central Sahara). Geology, 22, 641-644. https://doi.org/10.1130/0091-7613(1994)022<0641:PADTIT>2.3.CO;2
Boutrika, R. (2006). Contribution à l'étude des minéralisations aurifères liées aux aplites et microgranites de la région d'In-Abeggui et aux rhyolites d'Afra Héouhine (Hoggar Central) [Master Thesis]. Université des Sciences et de la Technologie Houari-Boumédièn, Alger.
Boutrika, R., Kolli, O., Aïssa, D. E. & Adachi, T. (2018). Particularites morphologiques et mineralogiques du gisement aurifere d'In Abeggui (Hoggar Central, Sud Algerien). Bulletin du Service Géologique de l'Algérie, 28(1-2), 17-42.
Boutrika, R., Ducrot, D., & Aissa, D. E. (2019).Contribution of remote sensing to mapping In-Abeggui gold deposit (Central Hoggar, South Algeria). Arabian Journal of Geosciences, 12, 23. https://doi.org/10.1007/s12517-018-4201-3
Boutrika, R. (2019) Gîtologie des filons aurifères liés aux gabbros et des veinules liées aux microgranites-aplites de la région d'In-Abeggui, terrane de Laouni (Hoggar) [Doctoral Thesis]. Université des Sciences et de la Technologie Houari-Boumédièn, Alger.
Caby, R. (1996). A review of the in Ouzzal granulitic terrane (Tuareg shield, Algeria): its significance within the Pan-African Trans-Saharan belt. Journal of Metamorphic Geology, 14, 659-666. https://doi.org/10.1111/j.1525-1314.1996.00048.x
Ferkous, K. (1995). Filons de quartz aurifères dans une zone de cisaillement lithosphérique panafricaine (Amesmessa-Tirek, Hoggar ouest, Algérie) [Doctoral Thesis]. Université Montpellier II, France.
Ferkous, K., Monie, P. (2002) Neoproterozoic shearing and auriferous hydrothermalism along the lithospheric N-S East In Ouzzal shear zone (Western Hoggar, Algeria, North Africa). Journal of African Earth Science, 35(3), 399-415. https://doi.org/10.1016/S0899-5362(02)00146-X
Henry, B., Bayou, B., Derder, M. E. M., Djellit, H., Ouabadi, A., Khaldi, A. & Hemmi, A. (2007). Late Panafrican evolution of the main Hoggar fault zones: Implications of magnetic fabric study in the In Telloukh pluton (Tin Serririne basin, Algeria). Journal of African Earth Sciences, 49, 211-221. https://doi.org/10.1016/j.jafrearsci.2007.09.004
Kalabachkine, S. & Boutrika, R. (1993). Rapport sur la prospection détaillée sur le champ d'In Abeggui (Feuille In Abeggui) [Unpublished report]. Office National de la Recherches Géologiques et Minières.
Kalabachkine, S., Saadi, A. A. & Moulay, L. (1994). Rapport sur la prospection détaillée sur le champ d'In Abeggui (Feuille In Abeggui) [Unpublished report]. Office National de la Recherches Géologiques et Minières.
Liégeois, J. P., Latouche, L., Boughrara, M., Navez, J. & Guiraud, M. (2003). The LATEA metacraton (Central Hoggar, Tuareg Shield, Algeria): behaviour of an old passive margin during the Pan-African orogeny. Journal of Earth Sciences, 37, 161-190. https://doi.org/10.1016/j.jafrearsci.2003.05.004
Liégeois, J. P., Abdelsalam, M. G., Ennih, N. & Ouabadi, A. (2013). Metacraton: nature, genesis and behavior. Gondwana Research, 23, 220-237. https://doi.org/10.1016/j.gr.2012.02.016
Marcoux, É., Nerci, Kh., Branquet, Y., Ramboz, C., Ruffet, G., Peucat, J. J., Stevenson, R. & Jébrak, M. (2015). Late-Hercynian intrusion-related gold deposits: An integrated model on the Tighza polymetallic district, central Morocco. Journal of African Earth Sciences, 107, 65-88. https://doi.org/10.1016/j.jafrearsci.2015.01.011
Marignac, C. H., Fourcade, S., Boiron, M. C., Joronn, J. L., Kienast, J. R. & Peucat, J. J. (1996). Metallogenesis of the late Pan-Africain gold East In Ouzzal shear zone (Hoggar, Algeria). Metamorphic Geology, 14, 783-801. https://doi.org/10.1111/j.1525-1314.1996.00056.x
Marignac, C. H., Aïssa, D. E., Bouabsa, L., Kesraoui, M. & Nedjari, S. (2016). The Hoggar Gold and Rare Metals Metallogenic Province of the Pan-African Tuareg Shield (Central Sahara, South Algeria): An Early Cambrian Echo of the Late Ediacaran Murzukian Event? In M. Bouabdellah & J. F. Slack (Eds.), Mineral Deposits of North Africa, Mineral Resource Reviews series (pp. 371-404). Springer International Publishing Switzerland 2016. https://doi.org/10.1007/978-3-319-31733-5_15
Published
How to Cite
Issue
Section
License
Copyright (c) 2023 Consejo Superior de Investigaciones Científicas (CSIC)
This work is licensed under a Creative Commons Attribution 4.0 International License.
© CSIC. Manuscripts published in both the print and online versions of this journal are the property of the Consejo Superior de Investigaciones Científicas, and quoting this source is a requirement for any partial or full reproduction.
All contents of this electronic edition, except where otherwise noted, are distributed under a Creative Commons Attribution 4.0 International (CC BY 4.0) licence. You may read the basic information and the legal text of the licence. The indication of the CC BY 4.0 licence must be expressly stated in this way when necessary.
Self-archiving in repositories, personal webpages or similar, of any version other than the final version of the work produced by the publisher, is not allowed.
