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Journal of Applied Remote Sensing • Open Access

Applying persistent scatterer interferometry for surface displacement mapping in the Azul open pit manganese mine (Amazon region) with TerraSAR-X StripMap data
Author(s): Carolina de Athayde Pinto; Waldir Renato Paradella; José Claudio Mura; Fabio Furlan Gama; Athos Ribeiro dos Santos; Guilherme Gregório Silva; Marcos Eduardo Hartwig

Paper Abstract

The Azul mining complex, located in the Carajás Mineral Province, Amazon region, encompasses the most important manganese mine in Brazil. Vale S.A. company operates three simultaneous open pit excavations (mines 1, 2, and 3) in the area, which are conducted on rock alteration products of low geomechanical quality related to sandstones, siltstones, and a lateritic cover. In order to monitor ground deformation, 33 TerraSAR-X (TSX-1) StripMap images covering the period of March 2012–April 2013 were used in the investigation. An advanced differential interferometric synthetic aperture radar (A-DInSAR) approach based on persistent scatterer interferometry (PSI) using an interferometric point target analysis algorithm was applied, and the results showed that most of the area was considered stable during the time span of the synthetic aperture radar acquisitions. However, persistent scatterers (PS) with high deformation rates were mapped over a waste pile, probably related to settlements, and also along the north flank of mine 1, indicative of cut slope movements toward the center of the pit. A spatial relationship of geological structures with PS was observed for this sector of the mine, given by PS showing deformation rates concentrated along a structural corridor with faults, fractures, and folds related to the Carajás fault system. Though only ground-based radar measurements for wall benches of mine 1 were available for a short time period of the TSX-1 coverage, the PS movement patterns showed concordance with geotechnical field measurements. The investigation emphasized the important role that satellite-based A-DInSAR can play for deformation monitoring and risk assessment in this kind of mining area.

Paper Details

Date Published: 22 December 2015
PDF: 18 pages
J. Appl. Rem. Sens. 9(1) 095978 doi: 10.1117/1.JRS.9.095978
Published in: Journal of Applied Remote Sensing Volume 9, Issue 1
Show Author Affiliations
Carolina de Athayde Pinto, Instituto Nacional de Pesquisas Espaciais (Brazil)
Waldir Renato Paradella, Instituto Nacional de Pesquisas Espaciais (Brazil)
José Claudio Mura, Instituto Nacional de Pesquisas Espaciais (Brazil)
Fabio Furlan Gama, Instituto Nacional de Pesquisas Espaciais (Brazil)
Athos Ribeiro dos Santos, Instituto Nacional de Pesquisas Espaciais (Brazil)
Guilherme Gregório Silva, Instituto Nacional de Pesquisas Espaciais (Brazil)
Marcos Eduardo Hartwig, Instituto Nacional de Pesquisas Espaciais (Brazil)

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