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The 1750 Ma Magmatic Event of the West African Craton (Anti-Atlas, Morocco)

Youbi, Nasrrddine ; Kouyate, Djiky ; Söderlund, Ulf LU ; Ernst, Richard E. ; Soulaimani, Abderrahmane ; Hafid, Ahmid ; Ikenne, Moha ; El Bahat, Abdelhakim ; Bertrand, Herve and Rkha Chaham, Khalid , et al. (2013) In Precambrian Research 236. p.106-123
Abstract
The Precambrian inliers of the Anti Atlas belt located at the southern part of Morocco contain numerous mafic dyke and sill swarms thought to represent the erosional remnants of Proterozoic Large Igneous Provinces (LIPS). As part of a continuing research campaign to date and characterize these LIPs, four dykes have been dated by the U-Pb TIMS (Thermal Ionization Mass Spectrometry) method on baddeleyite and zircon: ca. 1758 Ma in the Tagragra of Akka inlier, 1741 +/- 10 Ma in the Tafeltast-Kerdous inlier, 1746.8 +/- 3.7 Ma in the Iguerda-Tanst and 1734 +/- 5 Ma in the Zenaga inlier. The age matches (and chemical features akin to continental flood basalts) confirm a widespread intraplate magmatic event at 1750 Ma, herein termed the Tagragra... (More)
The Precambrian inliers of the Anti Atlas belt located at the southern part of Morocco contain numerous mafic dyke and sill swarms thought to represent the erosional remnants of Proterozoic Large Igneous Provinces (LIPS). As part of a continuing research campaign to date and characterize these LIPs, four dykes have been dated by the U-Pb TIMS (Thermal Ionization Mass Spectrometry) method on baddeleyite and zircon: ca. 1758 Ma in the Tagragra of Akka inlier, 1741 +/- 10 Ma in the Tafeltast-Kerdous inlier, 1746.8 +/- 3.7 Ma in the Iguerda-Tanst and 1734 +/- 5 Ma in the Zenaga inlier. The age matches (and chemical features akin to continental flood basalts) confirm a widespread intraplate magmatic event at 1750 Ma, herein termed the Tagragra of Akka LIP, that represents an important new magmatic tarcode' line for the West African Craton (WAC). Contemporaneous 1750 Ma LIP magmatism is reported in other crustal blocks including northwestern Laurentia and Siberia; together with the newly defined Tagragra of Akka event of the Anti Atlas region of the WAC this widespread 1750 Ma magmatism is postulated to collectively constitute a single huge LIP associated with a breakup attempt of Nuns (Columbia) shortly after its final assembly at ca. 1.8 Ga. (C) 2013 Elsevier B.V. All rights reserved. (Less)
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organization
publishing date
type
Contribution to journal
publication status
published
subject
keywords
West African Craton, Anti-Atlas, Mafic dyke and sill swarms, U-Pb, Baddeleyite, Zircon, Paleoproterozoic, Nuns (Columbia), Supercontinent, reconstruction
in
Precambrian Research
volume
236
pages
106 - 123
publisher
Elsevier
external identifiers
  • wos:000328806100008
  • scopus:84882747520
ISSN
0301-9268
DOI
10.1016/j.precamres.2013.07.003
language
English
LU publication?
yes
id
c55824e9-2d75-42bc-8f84-5d894bc21256 (old id 4261726)
date added to LUP
2016-04-01 10:59:02
date last changed
2022-03-27 21:21:54
@article{c55824e9-2d75-42bc-8f84-5d894bc21256,
  abstract     = {{The Precambrian inliers of the Anti Atlas belt located at the southern part of Morocco contain numerous mafic dyke and sill swarms thought to represent the erosional remnants of Proterozoic Large Igneous Provinces (LIPS). As part of a continuing research campaign to date and characterize these LIPs, four dykes have been dated by the U-Pb TIMS (Thermal Ionization Mass Spectrometry) method on baddeleyite and zircon: ca. 1758 Ma in the Tagragra of Akka inlier, 1741 +/- 10 Ma in the Tafeltast-Kerdous inlier, 1746.8 +/- 3.7 Ma in the Iguerda-Tanst and 1734 +/- 5 Ma in the Zenaga inlier. The age matches (and chemical features akin to continental flood basalts) confirm a widespread intraplate magmatic event at 1750 Ma, herein termed the Tagragra of Akka LIP, that represents an important new magmatic tarcode' line for the West African Craton (WAC). Contemporaneous 1750 Ma LIP magmatism is reported in other crustal blocks including northwestern Laurentia and Siberia; together with the newly defined Tagragra of Akka event of the Anti Atlas region of the WAC this widespread 1750 Ma magmatism is postulated to collectively constitute a single huge LIP associated with a breakup attempt of Nuns (Columbia) shortly after its final assembly at ca. 1.8 Ga. (C) 2013 Elsevier B.V. All rights reserved.}},
  author       = {{Youbi, Nasrrddine and Kouyate, Djiky and Söderlund, Ulf and Ernst, Richard E. and Soulaimani, Abderrahmane and Hafid, Ahmid and Ikenne, Moha and El Bahat, Abdelhakim and Bertrand, Herve and Rkha Chaham, Khalid and Ben Abbou, Mohamed and Mortaji, Abdelaziz and El Ghorfi, Mustapha and Zouhair, Mohamed and El Janati, M'hamed}},
  issn         = {{0301-9268}},
  keywords     = {{West African Craton; Anti-Atlas; Mafic dyke and sill swarms; U-Pb; Baddeleyite; Zircon; Paleoproterozoic; Nuns (Columbia); Supercontinent; reconstruction}},
  language     = {{eng}},
  pages        = {{106--123}},
  publisher    = {{Elsevier}},
  series       = {{Precambrian Research}},
  title        = {{The 1750 Ma Magmatic Event of the West African Craton (Anti-Atlas, Morocco)}},
  url          = {{http://dx.doi.org/10.1016/j.precamres.2013.07.003}},
  doi          = {{10.1016/j.precamres.2013.07.003}},
  volume       = {{236}},
  year         = {{2013}},
}