eprintid: 10200555
rev_number: 9
eprint_status: archive
userid: 699
dir: disk0/10/20/05/55
datestamp: 2024-11-25 14:46:19
lastmod: 2024-11-25 14:46:19
status_changed: 2024-11-25 14:46:19
type: article
metadata_visibility: show
sword_depositor: 699
creators_name: Gasparini, SP
creators_name: Vilela, CG
creators_name: Maslin, M
title: Paleoenvironmental characterisation of the Campos Basin slope (SE Brazil) in front of Cape São Tomé based on benthic foraminiferal biofacies succession since MIS 5
ispublished: pub
divisions: UCL
divisions: B03
divisions: C03
divisions: F26
keywords: Biofacies, Slope, Productivity, Bottom currents, South Atlantic
note: This version is the author accepted manuscript. For information on re-use, please refer to the publisher’s terms and conditions.
abstract: The distribution of benthic foraminifera and the assemblage dynamics were analysed on piston core GL-54 to understand the changes in paleoecology since Marine Isotopic Stage 5 (MIS 5). The core was drilled on the upper slope of the Campos Basin on the Rio de Janeiro (Brazil) coast. Benthic foraminifera biofacies, ecological indices, lithological facies, biostratigraphy, and isotopic analyses were undertaken to characterise the paleoenvironment in front of Cape of São Tomé. Two distinct biofacies were identified in the GL-54 sedimentary record since the Last Interglacial Period (MIS 5). These two biofacies point to seasonal organic matter and a well-oxygenated environment, however, Biofacies 2 can be differentiated from Biofacies 1 by the presence of significant bottom water currents. Biofacies 2 has the same species as Biofacies 1, except for Miliolinella subrotunda. Benthic foraminiferal species and biofacies from GL-54 were compared to the ones present in the upper portion of the GL-39 piston core, which was drilled from the middle slope of the same basin. Species such as Globocassidulina crassa, Islandiella norcrossi, Alabaminella weddellensis, Bolivina paula, M. subrotunda, Bulimina aculeata, Globocassidulina subglobosa, Rotorbinella lepida, and Uvigerina peregrina were found in both piston cores. The biofacies of both piston cores were correlated, pointing to similarities between the upper slope and the middle slope in the Campos Basin since MIS 5. In general, the upper and middle slopes of the Campos Basin are characterised as a well-oxygenated environment with variation in the deposition of organic matter. In addition to these environmental factors, there is evidence for a strong bottom current in MIS 2 at both sites, probably due to the displacement of Brazil Current and Intermediate Western Boundary Current.
date: 2024-08-31
date_type: published
publisher: Elsevier BV
official_url: http://dx.doi.org/10.1016/j.quaint.2024.08.004
full_text_type: other
language: eng
verified: verified_manual
elements_id: 2310841
doi: 10.1016/j.quaint.2024.08.004
lyricists_name: Maslin, Mark
lyricists_id: MAMAS08
actors_name: Maslin, Mark
actors_id: MAMAS08
actors_role: owner
full_text_status: restricted
publication: Quaternary International
volume: 709
pagerange: 29-42
citation:        Gasparini, SP;    Vilela, CG;    Maslin, M;      (2024)    Paleoenvironmental characterisation of the Campos Basin slope (SE Brazil) in front of Cape São Tomé based on benthic foraminiferal biofacies succession since MIS 5.                   Quaternary International , 709    pp. 29-42.    10.1016/j.quaint.2024.08.004 <https://doi.org/10.1016/j.quaint.2024.08.004>.      
 
document_url: https://discovery.ucl.ac.uk/id/eprint/10200555/1/Maslin_Manuscript_rev.pdf