Grain-size end-members and environmentally sensitive grain-size components: A comparative study in the mud shelf depocenters off southern Brazil

Author(s)

de Mahiques, Michel Michaelovitch ^{[1, 2]} ; Cazzoli y Goya, Samara ^[1] ; da Silva Nogueira de Matos, Maria Carolina ^[1] ; Udenal de Oliveira, Rodrigo Augusto ^[1] ; Mi Kim, Bianca Sung ^[1] ; de Lima Ferreira, Paulo Alves ^[1] ; Lopes Figueira, Rubens Cesar ^[1] ; Bicego, Marcia Caruso ^[1]

Affiliation

^[1] Univ Sao Paulo, Oceanog Inst, Praca Oceanog 191, BR-05508120 Sao Paulo - Brazil

^[2] Univ Sao Paulo, Inst Energy & Environm, Ave Prof Luciano Gualberto 1289, BR-05508010 Sao Paulo - Brazil

• Document type: Journal article
• Source: INTERNATIONAL JOURNAL OF SEDIMENT RESEARCH; v. 36, n. 2, p. 317-327, APR 2021.
• Web of Science Citations: 0

Abstract

The current study aims to do a comparative analysis of the results obtained with two End-Member (EM) grain-size modeling techniques (AnalySize and BasEMMA) and the Environmental Sensitive Grain-Size (ESGS) modeling for sediment samples collected in the mudbelts of the southern Brazilian shelf. The methods were compared using grain-size data from the south Brazilian shelf, and the results are discussed here. It is the first time that the concept of ESGS, in its present form, is utilized outside China. The results show that despite its relative ease of use, the ESGS is not fully comparable to the EM analyses, and only two grain-size ESGS classes were recognized as analogous to EMs. The comparison of the AnalySize and BasEMMA procedures also revealed significant differences between the techniques. A comparative analysis between the two EM techniques revealed advantages in the BasEMMA, especially in the better correlation of the end-members with the original grain size distribution. The analysis of the geographical distribution of the EM abundances allowed point sources of sandy populations to be recognized as well as the contribution of the Rio de la Plata as a source of silty sediments to be inferred. (C) 2020 International Research and Training Centre on Erosion and Sedimentation/the World Association for Sedimentation and Erosion Research. Published by Elsevier B.V. All rights reserved. (AU)

• FAPESP's process: 15/17763-2 - Mudbelts from the South and Southeast Brazil: implications about the anthropogenic influence on the marine environment
• Grantee: Márcia Caruso Bícego
• Support Opportunities: Research Projects - Thematic Grants
• FAPESP's process: 10/06147-5 - Increase of the research capabilities in oceanography and related sciences in São Paulo State, Brazil
• Grantee: Michel Michaelovitch de Mahiques
• Support Opportunities: Research Program on Global Climate Change - Regular Grants