Drilling the Aptian–Albian of the Sergipe–Alagoas Basin, Brazil: paleobiogeographic and paleoceanographic studies in the South Atlantic
The Aptian–Albian interval is characterized by significant paleoclimatic, paleoceanographic, and paleogeographic changes, which in turn affected the distribution and evolution of marine ecosystems. Despite the importance of such studies, there have been few correlations between Aptian–Albian section...
Published in: | Scientific Drilling |
---|---|
Main Authors: | , , , , , , , , , , , |
Format: | Article in Journal/Newspaper |
Language: | English |
Published: |
Copernicus Publications
2021
|
Subjects: | |
Online Access: | https://doi.org/10.5194/sd-29-1-2021 https://doaj.org/article/38581b592e71427c897a57d0407a88e8 |
id |
ftdoajarticles:oai:doaj.org/article:38581b592e71427c897a57d0407a88e8 |
---|---|
record_format |
openpolar |
spelling |
ftdoajarticles:oai:doaj.org/article:38581b592e71427c897a57d0407a88e8 2023-05-15T18:20:48+02:00 Drilling the Aptian–Albian of the Sergipe–Alagoas Basin, Brazil: paleobiogeographic and paleoceanographic studies in the South Atlantic G. Fauth M. D. R. Bruno J. Villegas-Martín J. F. Savian R. D. M. Guerra G. Krahl F. H. D. O. Lima O. Strohschoen Jr. R. G. D. Mello F. M. Lopes C. G. Leandro E. D. S. Aguiar 2021-04-01T00:00:00Z https://doi.org/10.5194/sd-29-1-2021 https://doaj.org/article/38581b592e71427c897a57d0407a88e8 EN eng Copernicus Publications https://sd.copernicus.org/articles/29/1/2021/sd-29-1-2021.pdf https://doaj.org/toc/1816-8957 https://doaj.org/toc/1816-3459 doi:10.5194/sd-29-1-2021 1816-8957 1816-3459 https://doaj.org/article/38581b592e71427c897a57d0407a88e8 Scientific Drilling, Vol 29, Pp 1-17 (2021) Geology QE1-996.5 article 2021 ftdoajarticles https://doi.org/10.5194/sd-29-1-2021 2022-12-31T08:36:21Z The Aptian–Albian interval is characterized by significant paleoclimatic, paleoceanographic, and paleogeographic changes, which in turn affected the distribution and evolution of marine ecosystems. Despite the importance of such studies, there have been few correlations between Aptian–Albian sections of the Tethys Sea and those of the South Atlantic Ocean. This interval, including the Aptian–Albian transition, is preserved in the deposits of the Riachuelo Formation (Sergipe–Alagoas Basin, Brazil) located in the South Atlantic Ocean; therefore, this location was chosen for drilling four new cores. The goals of this paper are as follows: (1) to explain the drilling operation carried out in the deposits of the Riachuelo Formation and the methods used; (2) to present a brief lithostratigraphic characterization of the holes and the paleomagnetic data of core SER-03; and (3) to describe the high potential of the cores recovered for additional investigation in the future. The lithostratigraphic units of the SER-01 core consist mainly of coarse- to fine-grained sandstone, shales, marls, and mudstones; the SER-02 core was excluded due to low recovery; the SER-03 core is mainly composed of fine-grained sediments (shale, marls, and packstone) and bears some ammonite shells; the lithology of core SER-04 is mainly sandstones. Magnetic susceptibility values ( χ lf and χ hf) and frequency-dependent susceptibility ( χ fd) data suggest that the section is located within the Cretaceous Normal Superchron. Future studies on these cores integrating micropaleontological, paleoichnological, geochemical, stratigraphic, and paleomagnetic (e.g., relative intensity) data will allow for a better understanding of paleoceanographic and paleogeographic events related to the early evolution of the South Atlantic Ocean and how these events correlate to similar events in Tethyan sections. Article in Journal/Newspaper South Atlantic Ocean Directory of Open Access Journals: DOAJ Articles Scientific Drilling 29 1 17 |
institution |
Open Polar |
collection |
Directory of Open Access Journals: DOAJ Articles |
op_collection_id |
ftdoajarticles |
language |
English |
topic |
Geology QE1-996.5 |
spellingShingle |
Geology QE1-996.5 G. Fauth M. D. R. Bruno J. Villegas-Martín J. F. Savian R. D. M. Guerra G. Krahl F. H. D. O. Lima O. Strohschoen Jr. R. G. D. Mello F. M. Lopes C. G. Leandro E. D. S. Aguiar Drilling the Aptian–Albian of the Sergipe–Alagoas Basin, Brazil: paleobiogeographic and paleoceanographic studies in the South Atlantic |
topic_facet |
Geology QE1-996.5 |
description |
The Aptian–Albian interval is characterized by significant paleoclimatic, paleoceanographic, and paleogeographic changes, which in turn affected the distribution and evolution of marine ecosystems. Despite the importance of such studies, there have been few correlations between Aptian–Albian sections of the Tethys Sea and those of the South Atlantic Ocean. This interval, including the Aptian–Albian transition, is preserved in the deposits of the Riachuelo Formation (Sergipe–Alagoas Basin, Brazil) located in the South Atlantic Ocean; therefore, this location was chosen for drilling four new cores. The goals of this paper are as follows: (1) to explain the drilling operation carried out in the deposits of the Riachuelo Formation and the methods used; (2) to present a brief lithostratigraphic characterization of the holes and the paleomagnetic data of core SER-03; and (3) to describe the high potential of the cores recovered for additional investigation in the future. The lithostratigraphic units of the SER-01 core consist mainly of coarse- to fine-grained sandstone, shales, marls, and mudstones; the SER-02 core was excluded due to low recovery; the SER-03 core is mainly composed of fine-grained sediments (shale, marls, and packstone) and bears some ammonite shells; the lithology of core SER-04 is mainly sandstones. Magnetic susceptibility values ( χ lf and χ hf) and frequency-dependent susceptibility ( χ fd) data suggest that the section is located within the Cretaceous Normal Superchron. Future studies on these cores integrating micropaleontological, paleoichnological, geochemical, stratigraphic, and paleomagnetic (e.g., relative intensity) data will allow for a better understanding of paleoceanographic and paleogeographic events related to the early evolution of the South Atlantic Ocean and how these events correlate to similar events in Tethyan sections. |
format |
Article in Journal/Newspaper |
author |
G. Fauth M. D. R. Bruno J. Villegas-Martín J. F. Savian R. D. M. Guerra G. Krahl F. H. D. O. Lima O. Strohschoen Jr. R. G. D. Mello F. M. Lopes C. G. Leandro E. D. S. Aguiar |
author_facet |
G. Fauth M. D. R. Bruno J. Villegas-Martín J. F. Savian R. D. M. Guerra G. Krahl F. H. D. O. Lima O. Strohschoen Jr. R. G. D. Mello F. M. Lopes C. G. Leandro E. D. S. Aguiar |
author_sort |
G. Fauth |
title |
Drilling the Aptian–Albian of the Sergipe–Alagoas Basin, Brazil: paleobiogeographic and paleoceanographic studies in the South Atlantic |
title_short |
Drilling the Aptian–Albian of the Sergipe–Alagoas Basin, Brazil: paleobiogeographic and paleoceanographic studies in the South Atlantic |
title_full |
Drilling the Aptian–Albian of the Sergipe–Alagoas Basin, Brazil: paleobiogeographic and paleoceanographic studies in the South Atlantic |
title_fullStr |
Drilling the Aptian–Albian of the Sergipe–Alagoas Basin, Brazil: paleobiogeographic and paleoceanographic studies in the South Atlantic |
title_full_unstemmed |
Drilling the Aptian–Albian of the Sergipe–Alagoas Basin, Brazil: paleobiogeographic and paleoceanographic studies in the South Atlantic |
title_sort |
drilling the aptian–albian of the sergipe–alagoas basin, brazil: paleobiogeographic and paleoceanographic studies in the south atlantic |
publisher |
Copernicus Publications |
publishDate |
2021 |
url |
https://doi.org/10.5194/sd-29-1-2021 https://doaj.org/article/38581b592e71427c897a57d0407a88e8 |
genre |
South Atlantic Ocean |
genre_facet |
South Atlantic Ocean |
op_source |
Scientific Drilling, Vol 29, Pp 1-17 (2021) |
op_relation |
https://sd.copernicus.org/articles/29/1/2021/sd-29-1-2021.pdf https://doaj.org/toc/1816-8957 https://doaj.org/toc/1816-3459 doi:10.5194/sd-29-1-2021 1816-8957 1816-3459 https://doaj.org/article/38581b592e71427c897a57d0407a88e8 |
op_doi |
https://doi.org/10.5194/sd-29-1-2021 |
container_title |
Scientific Drilling |
container_volume |
29 |
container_start_page |
1 |
op_container_end_page |
17 |
_version_ |
1766199118855667712 |