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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.)

Hyperspectral remote sensing applied to mineral exploration in southern Peru: A multiple data integration approach in the Chapi Chiara gold prospect

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Author(s):
Carrino, Thais Andressa [1] ; Crosta, Alvaro Penteado [2] ; Bemfica Toledo, Catarina Laboure [3] ; Silva, Adalene Moreira [3]
Total Authors: 4
Affiliation:
[1] Univ Fed Pernambuco, Dept Geol, Ave Arquitetura, S-N, BR-50740550 Recife, PE - Brazil
[2] Univ Estadual Campinas, Inst Geosci, POB 6152, BR-13083870 Campinas, SP - Brazil
[3] Univ Brasilia, Inst Geosci, Campus Univ Darcy Ribeiro S-N, BR-70910900 Brasilia, DF - Brazil
Total Affiliations: 3
Document type: Journal article
Source: International Journal of Applied Earth Observation and Geoinformation; v. 64, p. 287-300, FEB 2018.
Web of Science Citations: 13
Abstract

Remote sensing is a strategic key tool for mineral exploration, due to its capacity of detecting hydrothermal alteration minerals or alteration mineral zones associated with different types of mineralization systems. A case study of an epithermal system located in southern Peru is presented, aimed at the characterization of mineral assemblies for discriminating potential high sulfidation epithermal targets, using hyperspectral imagery integrated with petrography, XRD and magnetic data. HyMap images were processed using the Mixture Timed Matched Filtering (MTMF) technique for producing alteration map in the Chapi Chiara epithermal gold prospect. Extensive areas marked by advanced argillic alteration (alunite-kaolinite-dickite +/- topaz) were mapped in detail, as well as limited argillic (illite-smectite) and propylitic (chlorite spectral domain) alteration. The magmatic-hydrothermal processes responsible for the formation of hypogene minerals were also related to the destruction of ferrimagnetic minerals (e.g., magnetite) of host rocks such as andesite, and the remobilization/formation of paramagnetic Fe-Ti oxides (e.g., rutile, anatase). The large alteration zones of advanced argillic alteration are controlled by structures related to a regional NW-SE trend, and also by local NE-SW and ENE-WSW ones. (AU)

FAPESP's process: 11/00106-8 - GEOLOGY AND HYDROTHERMAL ALTERATION OF THE CHAPI CHIARA GOLD PROSPECT AND NEARBY TARGETS, SOUTHERN PERU, THROUGH GEOLOGICAL, REMOTE SENSING, GEOCHEMICAL AND MAGNETIC DATA
Grantee:Thais Andressa Carrino
Support Opportunities: Scholarships in Brazil - Doctorate