# Abdeina 2024: How old is the Eye of Africa? A polyphase history for the igneous Richat Structure, Mauritania

> El Houssein Abdeina, Fred Jourdan, Gilles Chazot et al., 2024. 6 records on Mysteries Department cite it. Cited for the first 40Ar/39Ar work on the…

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[Sources](https://mysteriesdept.com/sources)[Eye of the Sahara and Atlantis](https://mysteriesdept.com/mysteries/eye-of-the-sahara)Abdeina 2024

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# How old is the Eye of Africa? A polyphase history for the igneous Richat Structure, Mauritania

El Houssein Abdeina, Fred Jourdan, Gilles Chazot et al., 2024. _Lithos_ 482-483: 107698.

First plagioclase 40Ar/39Ar work and new geochemistry on the Richat gabbros. No robust age was obtained, but modelling places them at 230–200 Ma, matching the Central Atlantic Magmatic Province, later domed by the 99 Ma alkaline intrusion.

**Eye of the Sahara and AtlantisSecondary source** Articledoi: **[10.1016/j.lithos.2024.107698](https://doi.org/10.1016/j.lithos.2024.107698)** Checked against the original0

## What it's used for here

Cited for the first 40Ar/39Ar work on the gabbros, which models them as Central Atlantic Magmatic Province sills of 230–200 Ma domed about 100 million years later; no robust age was obtained.

## Cited by on this site 6 records

[Matton and colleagues mapped the basalts as subvertical ring dikes, not sills](https://mysteriesdept.com/mysteries/eye-of-the-sahara/evidence/EVD0DCKSHFEKGXN/matton-and-colleagues-mapped-the-basalts-as-subvertical-ring)

Evidence

EVD

[Plagioclase 40Ar/39Ar modelling places the gabbros at 230 to 200 Ma, not in the Cretaceous](https://mysteriesdept.com/mysteries/eye-of-the-sahara/evidence/EVD0DCKSGCEA21B/plagioclase-40ar-39ar-modelling-places-the-gabbros-at-230-to)

Evidence

EVD

[The 40Ar/39Ar analyses of the gabbros gave no robust age](https://mysteriesdept.com/mysteries/eye-of-the-sahara/evidence/EVD0DCKSHRYV5N1/the-40ar-39ar-analyses-of-the-gabbros-gave-no-robust-age)

Evidence

EVD

[The gabbros' chemistry matches the two CAMP groups best represented in north-west Africa](https://mysteriesdept.com/mysteries/eye-of-the-sahara/evidence/EVD0DCKSGVZ9GNT/the-gabbros-chemistry-matches-the-two-camp-groups-best)

Evidence

EVD

[Abdeina and colleagues model the gabbro rings as sills about 100 million years older than the dome](https://mysteriesdept.com/mysteries/eye-of-the-sahara/events/EVT0DCKR6H9YQR0/abdeina-and-colleagues-model-the-gabbro-rings-as-sills-about)

EVT

[The Eye of the Sahara and Atlantis](https://mysteriesdept.com/mysteries/eye-of-the-sahara)

The mystery article

MYS

## Cite it

```
Abdeina, E. H., Jourdan, F., Chazot, G., Bertrand, H., & Le Gall, B. (2024). How old is the Eye of Africa? A polyphase history for the igneous Richat Structure, Mauritania. Lithos, 482-483, 107698. https://doi.org/10.1016/j.lithos.2024.107698
```

[Find it at doi.org](https://doi.org/10.1016/j.lithos.2024.107698)

Key

**SRC** 0DCKM2MNEZG1

Kind

Journal article

Rights

The publisher's

Kept

28 Oct 2026, for editors

Checked

Against the published article

Added by

[apollo](https://mysteriesdept.com/u/apollo)

The record

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