@misc{10481/106552,
year = {2026},
month = {1},
url = {https://hdl.handle.net/10481/106552},
abstract = {We provide new detrital zircon U/Pb geochronological data from nine samples of Neoproterozoic–Cambrian
metasedimentary rocks of the northern Mauritanide Belt, aiming at constraining depositional ages and provenance in the paleotectonic context of the Rodinia to Gondwana supercontinent transition. The youngest detrital
zircon populations indicate the following maximum depositional ages: c. 900 Ma (early Tonian) for the Atilis
Quartzite Formation, c. 660 Ma (Cryogenian) for the gneissic Hajar Dekhen-Kleouat Unit, c. 580 Ma (middle
Ediacaran) for the Atomai Formation, and c. 540 Ma (late Ediacaran–early Cambrian) for the Sainte Barbe
Formation and the ophiolite-like Agoualilet Unit. Two types of zircon age distributions were identified, reflecting
the most reliable original sources. Type I age spectra include c. 2.8 Ga, 2.1 Ga and 0.6 Ga age populations, which
are interpreted to derive from West African Craton sources (Leonian/Liberian, Eburnean, Pan-African orogenies).
Type I signature is found in the Atomai and Sainte Barbe formations and the Agoualilet Unit. Type II age spectra
include, besides the type I populations, c. 1.8, 1.5, 1.2 and 1.0 Ga age populations, which are thought to derive
from sources in the Amazonian Craton (Central Amazonian, Trans-Amazonian, Rio Negro-Juruena, RondonianSan Ignacio, Sunsas-Grenvillian ´ and Brasiliano orogenies). Type II signature is found in the Atilis Quartzite and
Atomai formations, Hajar Dekhen-Kleouat Unit, and the Cambrian Nouatil Group (intra-WAC Taoudeni Basin).
The changes in the detrital zircon record through the studied Neoproterozoic–Cambrian successions resulted
from shifts in drainage systems and alternating sediment supply from both the West African and the Amazonian
cratons along most of the Neoproterozoic period. Finally, we interpret that the subsequent opening of a shortlived oceanic realm (the Clymene Ocean) during the latest Ediacaran between the West African and the
Amazonian cratons interrupted the direct sediment supply from the Amazonian Craton.},
organization = {MICIN/AEI/10.13039/501100011033  (PID2020-118822GBI00; PRE2021-098050)},
organization = {University of Granada / CBUA (Open access)},
publisher = {Elsevier B.V.},
keywords = {Mauritanide Belt},
keywords = {West African Craton},
keywords = {Amazonian Craton},
title = {Persistent Amazonian and West African detrital zircon signature in the northern Mauritanide Belt},
doi = {10.1016/j.gr.2025.07.026},
author = {Jiménez Borrego, Roberto and Martínez Poyatos, David Jesús and Azor Pérez, Antonio and Accotto, Cristina and Jabaloy Sánchez, Antonio and González Lodeiro, Francisco and Salem Sabar, Mohamed and Hamoud, Ahmed and Ould Ely Lekouyrie, Ahmed},
}