GEOLOGY AND HYDROTHERMAL ALTERATION OF THE CHAPI CHIARA GOLD PROSPECT AND NEARBY TARGETS, SOUTHERN PERU, THROUGH GEOLOGICAL, REMOTE SENSING, GEOCHEMICAL AND MAGNETIC DATA

• Grant number: 11/00106-8
• Support Opportunities: Scholarships in Brazil - Doctorate
• Effective date (Start): April 01, 2011
• Effective date (End): February 28, 2015
• Field of knowledge: Physical Sciences and Mathematics - Geosciences - Geology
• Principal Investigator: Alvaro Penteado Crósta
• Grantee: Thais Andressa Carrino
• Host Institution: Instituto de Geociências (IG). Universidade Estadual de Campinas (UNICAMP). Campinas , SP, Brazil

Abstract

The recent discovery of an important gold deposit in the Chucapaca region, southern Peru (Andean Cordillera) constitutes the central motivation of this study, aiming the geologic characterization of this region based on the application of indirect and direct methods of investigation. Using hyperspectral remote sensing images (HyMap), we will apply image digital processing and spatial data modeling techniques to identify the main hydrothermal alteration minerals; reflectance spectroscopy was also employed as an ancillary technique in the field and laboratory stages. The project also explores the statistical assessment of the accuracy of the mineralogical-spectral maps, comparing of the results of the spatial distribution of the minerals mapped through different computational maps with ground truth data based on mineralogical information obtained in the field. Thus, the best map(s) will be selected and integrated with geologic data, such as X-ray diffraction, SEM-EDS, and petrography. With the integration of the above mentioned data, we expect to characterize the main hydrothermal mineral phases, select the image processing techniques best suited for this case study, and to analyze the hydrothermal processes that resulted in the concentration of metals.

Scientific publications

(References retrieved automatically from Web of Science and SciELO through information on FAPESP grants and their corresponding numbers as mentioned in the publications by the authors)

CARRINO, THAIS ANDRESSA; CROSTA, ALVARO PENTEADO; BEMFICA TOLEDO, CATARINA LABOURE; SILVA, ADALENE MOREIRA; SILVA, JOHANN LAMBERT. Geology and Hydrothermal Alteration of the Chapi Chiara Prospect and Nearby Targets, Southern Peru, Using ASTER Data and Reflectance Spectroscopy. ECONOMIC GEOLOGY, v. 110, n. 1, p. 73-90, JAN-FEB 2015. (11/00106-8)

CARRINO, THAIS ANDRESSA; CROSTA, ALVARO PENTEADO; BEMFICA TOLEDO, CATARINA LABOURE; SILVA, ADALENE MOREIRA. Unveiling the hydrothermal mineralogy of the Chapi Chiara gold prospect, Peru, through reflectance spectroscopy, geochemical and petrographic data. ORE GEOLOGY REVIEWS, v. 64, p. 299-315, JAN 2015. (11/00106-8)

CARRINO, THAIS ANDRESSA; CROSTA, ALVARO PENTEADO; BEMFICA TOLEDO, CATARINA LABOURE; SILVA, ADALENE MOREIRA. Hyperspectral remote sensing applied to mineral exploration in southern Peru: A multiple data integration approach in the Chapi Chiara gold prospect. International Journal of Applied Earth Observation and Geoinformation, v. 64, p. 287-300, FEB 2018. (11/00106-8)

Academic Publications

(References retrieved automatically from State of São Paulo Research Institutions)

CARRINO, Thais Andressa. Geology and hydrothermal alteration of the Chapi Chiara gold prospect and nearby targets, southern Peru, through geological, remote sensing, geochemical and magnetic data. 2015. Doctoral Thesis - Universidade Estadual de Campinas (UNICAMP). Instituto de Geociências Campinas, SP.