The architecture of the Eopaleozoic Cococi Basin, northeastern Brazil: 2D geological modelling from magnetic and gravimetric data

Cococi Basin is a small Eopaleozoic syneclise that is overlying basement rocks of the Neoproterozoic Central Ceará Domain of the Borborema Province, northeastern Brazil. Its origin is associated with the final stages of the Brasiliano orogenic cycle (600 My). The Basin classified as rift type has it...

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Bibliographic Details
Published in:	Journal of South American earth sciences Vol. 106; p. 102903
Main Authors:	Filho, Francisco Fernando B. dos S., Magini, Christiano, Chiozza, Sebastián González, Castelo Branco, Raimundo Mariano G.
Format:	Journal Article
Language:	English
Published:	Elsevier Ltd 01-03-2021
Subjects:	2D modeling Analytic signal Euler deconvolution Minimum curvature 2D modeling Euler deconvolution Minimum curvature Analytic signal
Online Access:	Get full text
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Summary:	Cococi Basin is a small Eopaleozoic syneclise that is overlying basement rocks of the Neoproterozoic Central Ceará Domain of the Borborema Province, northeastern Brazil. Its origin is associated with the final stages of the Brasiliano orogenic cycle (600 My). The Basin classified as rift type has its basement constituted by rocks of the Canindé Unit and the crosshead complex and delimited by Senador Pompeu and Tauá shear zones. Three geophysical cross-sections were created using aero-magnetometric and field gravimetric data, aiming to outline the litho-structural underground features of the Basin. We have used the following methods for processing and interpreting geophysical data: minimum curvature, analytic signal amplitude, Euler deconvolution, and 2D modeling. The obtained depth solutions were interpreted and combined with geological data to generate geological models featuring the limits and depth of the Basin, its internal main structures, and its lithological variations. The developed geophysical-based geological modeling unravels the yet unknown geological features of the Cococi Basin, which corroborates with geological field observations, surface mapping and the results of previous investigations. •The Cococi Basin was studied based on magnetic and gravimetric data.•Estimating the depth of gravimetric and magnetic sources using Euler deconvolution, analytical signal and minimum curvature.•Modelling gravimetric in sedimentary type Basin rift.•Evidence of magmatism on the Cococi Basin based on Euler deconvolution and modelling gravimetric.•The knowledge of faults intraBasin can increase mineral exploration in Cococi Basin.
ISSN:	0895-9811 1873-0647
DOI:	10.1016/j.jsames.2020.102903