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(Reference retrieved automatically from Web of Science through information on FAPESP grant and its corresponding number as mentioned in the publication by the authors.)

Cross-strata palaeocurrent analysis using virtual outcrops

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Author(s):
Freitas, Bernardo T. [1] ; Silva, Leonardo H. G. [1] ; Almeida, Renato P. [2] ; Galeazzi, Cristiano P. [2] ; Figueiredo, Heitor G. [2] ; Tamura, Larissa N. [2] ; Janikian, Liliane [3] ; Figueiredo, Felipe T. [4] ; Assine, Mario L. [5]
Total Authors: 9
Affiliation:
[1] Univ Estadual Campinas, Sch Technol, Geol Lab, Rua Paschoal Marmo 1888, BR-13484332 Limeira, SP - Brazil
[2] Univ Sao Paulo, Inst Geosci, Rua Lago 562, Cidade Univ, BR-05508080 Sao Paulo, SP - Brazil
[3] Sao Paulo Fed Univ, Inst Marine Sci, Rua Carvalho Mendonca 144, BR-11070100 Santos, SP - Brazil
[4] Univ Fed Sergipe, Programa Posgrad Geociencias & Anal Bacias, Dept Geol DGEOL, Marechal Rondon Ave, Geol Bldg, Multiuser Complex, BR-49100000 Sao Cristavelo, SE - Brazil
[5] Univ Estadual Paulista UNESP, Inst Geociencias & Ciencias Exatas, Dept Geol Aplicada, Ave 24-A, Bela Vista 178, BR-13506900 Rio Claro, SP - Brazil
Total Affiliations: 5
Document type: Journal article
Source: SEDIMENTOLOGY; v. 68, n. 6, p. 2397-2421, OCT 2021.
Web of Science Citations: 0
Abstract

Although virtual outcrops or digital outcrop model applications in geological studies are becoming increasingly common, virtually no attention has been given to acquisition of palaeocurrent data from cross-strata. Palaeocurrent indicators are abundant in the sedimentary record, mainly as cross-strata, and present compelling implications for basin analysis, plate tectonics and palaeoenvironmental reconstructions, as well as for sediment transport systems. Palaeocurrents from cross-strata also comprise a quantifiable parameter in sedimentary successions that can be used in quantitative modelling of depositional architecture with implications for reservoir characterization through outcrop analogue studies. A common obstacle in obtaining large cross-strata orientation datasets is the limited access to steep and high outcrop faces, as well as financial and time restrictions on field work. To overcome these issues, the simplest workflow for drone-based acquisition, photogrammetric processing and analysis of virtual outcrops aiming at the attainment of palaeocurrent data from cross-strata is appraised here. The results show that orientations of cross-beds measured on virtual outcrops, with and without ground control points, and using two different levels of resolution downsampling, are comparable to field measurements using analogue and electronic devices. Time and financial resources can thus be saved by using the straightforward method presented here to supplement palaeocurrent mapping across wide areas and distinct stratigraphic intervals. (AU)

FAPESP's process: 16/19736-5 - Quantitative approaches for big river deposits: integrated field geology and 3D photogrammetric models
Grantee:Bernardo Tavares Freitas
Support type: Regular Research Grants
FAPESP's process: 16/03091-5 - CHARACTERIZATION OF HETEROGENEITIES AND MODELING OF RESERVOIR ANALOGUES IN FLUVIAL AND EOLIAN DEPOSITS
Grantee:Liliane Janikian Paes de Almeida
Support type: Regular Research Grants
FAPESP's process: 17/06874-3 - Fluvial dynamics and sedimentary deposits in the Amazon channel: providing tools to decipher the paleogeographical evolution of Amazonia and deposits of large anabranching rivers in the rock record
Grantee:Cristiano Padalino Galeazzi
Support type: Scholarships in Brazil - Doctorate
FAPESP's process: 14/00519-9 - Centralities of night-time leisure in the city of São Carlos-SP and the interface relations
Grantee:Tiago Ferreira Lopes Machado
Support type: Scholarships in Brazil - Scientific Initiation