Article (Scientific journals)
Late Quaternary episodes of clastic sediment deposition in the Tarimba Cave, Central Brazil
Caldeira, Dandara; Uagoda, Rogério; Nogueira, Adivane Morais et al.
2021In Quaternary International, 580, p. 22 - 37
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Keywords :
Cave; Paleoenvironment; Sedimentary facies; Sedimentation; Earth-Surface Processes
Abstract :
[en] The study presents three sedimentary profiles from Tarimba cave in central Brazil. The data allow constraining the late Quaternary sedimentary evolution of cave systems in the region. A multi-techniques approach was used to characterize sediment texture (grain size and circularity index), mineralogical composition (X-Ray Diffraction), chemical composition (ICP-OES) and deposition ages (Optically Stimulated Luminescence and radiocarbon). Eight sedimentary facies were identified, including a facies formed by autochthonous sediments (Guano) and seven facies formed by allochthonous siliciclastic sediments. The siliciclastic facies range from clayey to gravelly deposits that correspond to high-density gravity flows (Diamicton) and water laid traction process of varied deposition energy (Channel, Backswamp, and Slackwater). The studied deposits reflect an intense cave filing from the Middle to Late Pleistocene in the last 200 Ka. Subsequent depositional events formed three sedimentation phases: the first before 200 Ka corresponding to a larger granulometric interval, clay to gravel, identified through erosive surfaces; the second, after 197 Ka, is composed of sandy sediments and oscillations in the water flow energy. The third phase between 87 and 52 Ka (which covered the other stages) was responsible for the last fluvial deposition.
Disciplines :
Earth sciences & physical geography
Author, co-author :
Caldeira, Dandara ;  Institute of Geoscience, University of Brasilia, Brasilia, Brazil
Uagoda, Rogério;  Institute of Geoscience, University of Brasilia, Brasilia, Brazil ; Department of Geography, University of Brasilia, Brasilia, Brazil
Nogueira, Adivane Morais;  Department of Geography, University of Brasilia, Brasilia, Brazil
Garnier, Jeremie ;  Institute of Geoscience, University of Brasilia, Brasilia, Brazil
Sawakuchi, André Oliveira;  Institute of Geosciences, University of São Paulo, São Paulo, Brazil
Hussain, Yawar  ;  Université de Liège - ULiège > Département de géologie > Géologie de l'environnement
Language :
English
Title :
Late Quaternary episodes of clastic sediment deposition in the Tarimba Cave, Central Brazil
Publication date :
10 April 2021
Journal title :
Quaternary International
ISSN :
1040-6182
eISSN :
1873-4553
Publisher :
Elsevier Ltd
Volume :
580
Pages :
22 - 37
Peer reviewed :
Peer Reviewed verified by ORBi
Available on ORBi :
since 20 September 2022

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