U-Pb dating of detrital zircon and its implications for provenance of the sediments of Penedo Formation, Basin of Sergipe-Alagoas, NE Brazil
DOI:
https://doi.org/10.11606/issn.2316-9095.v18-126934Keywords:
Provenance Analysis, U-Pb Dating, Penedo Formation, Sergipe-Alagoas Basin.Abstract
The Penedo Formation represents a river-delta system of braided pattern that belongs to the rift stage of the Sergipe-Alagoas Basin. This work was executed on the classical outcrop section in the city of Penedo, state of Alagoas, Brazil, and named here as PDO-01. The methodology consisted of paleocurrent analysis allied to U-Pb dating of detrital zircon by laser ablation mass spectrometry. The sedimentary record of paleocurrents indicate a contribution coming from north, as the analyzed crystals yielded ages ranging from Mesoarchean (3098 ± 33 Ma) to Paleozoic (530 ± 12 Ma), that can be gathered in five groups (G1 to G5). From this analysis, the following sources were proposed: for the first group (G1), Neoproterozoic granites (~670 Ma) from the Pernambuco-Alagoas Domain; for the second group (G2), the rocks of the Cabrobó Complex (~0.9 – 1.2 Ga); for the third group (G3), the rocks of the Arapiraca Complex with Paleoproterozoic ages (~1.6 – 2.2 Ga); and for the fourth and fifth groups (G4 and G5), the rocks of the Nicolau Campo Grande Complex, with Neoarquean ages (~2.4 – 3.0 Ga).
Downloads
Downloads
Published
Issue
Section
License
Authors who publish in this journal shall comply with the following terms:
- Authors keep their copyright and grant to Geologia USP: Série Científica the right of first publication, with the paper under the Creative Commons BY-NC-SA license (summary of the license: https://creativecommons.org/licenses/by-nc-sa/4.0 | full text of the license: https://creativecommons.org/licenses/by-nc-sa/4.0/legalcode) that allows the non-commercial sharing of the paper and granting the proper copyrights of the first publication in this journal.
- Authors are authorized to take additional contracts separately, for non-exclusive distribution of the version of the paper published in this journal (publish in institutional repository or as a book chapter), granting the proper copyrights of first publication in this journal.
- Authors are allowed and encouraged to publish and distribute their paper online (in institutional repositories or their personal page) at any point before or during the editorial process, since this can generate productive changes as well as increase the impact and citation of the published paper (See The effect of Open Access and downloads on citation impact).
