Reconnaissance of hydrothermal alteration with the ASTER sensor, in the middle course of Río Santa Cruz (31°40' S), province of San Juan

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The advanced spaceborne thermal emission and reflection radiometer (ASTER) was used to identify different deposits of hydrothermal alteration which indicates that several important lithological groups can be mapped in areas with good exposure by using spectral-matching techniques. Different methods...

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Autores principales: Pérez, D.J., D'Odorico Benites, P.E., Godeas, M.C.
Formato: Artículo publishedVersion
Lenguaje:Inglés
Publicado: 2010
Materias:
ASTER
Cordillera Frontal
Hydrothermal alteration
Miocene
Remote sensing
San Juan
clay mineral
cordillera
hydrothermal alteration
hydrothermal deposit
lithology
multispectral image
remote sensing
satellite data
Andes
Argentina
San Juan [Argentina]
Santa Cruz [Argentina]
Santa Cruz River [Santa Cruz]
Acceso en línea:http://hdl.handle.net/20.500.12110/paper_00044822_v66_n4_p623_Perez
Aporte de:
Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) de Universidad de Buenos Aires
id paperaa:paper_00044822_v66_n4_p623_Perez
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spelling paperaa:paper_00044822_v66_n4_p623_Perez2023-06-12T16:40:32Z Reconnaissance of hydrothermal alteration with the ASTER sensor, in the middle course of Río Santa Cruz (31°40' S), province of San Juan Rev. Asoc. Geol. Argent. 2010;66(4):623-633 Pérez, D.J. D'Odorico Benites, P.E. Godeas, M.C. ASTER Cordillera Frontal Hydrothermal alteration Miocene Remote sensing San Juan ASTER clay mineral cordillera hydrothermal alteration hydrothermal deposit lithology Miocene multispectral image remote sensing satellite data Andes Argentina Cordillera Frontal San Juan [Argentina] Santa Cruz [Argentina] Santa Cruz River [Santa Cruz] The advanced spaceborne thermal emission and reflection radiometer (ASTER) was used to identify different deposits of hydrothermal alteration which indicates that several important lithological groups can be mapped in areas with good exposure by using spectral-matching techniques. Different methods are tested in order to identify and map zones with hydrothermal alteration minerals using the ASTER dataset. These areas are often referred to having large quantities of clay minerals which can be detected using multispectral imagery. Several authors have developed different procedures to map these hydrothermal minerals. Among the simplest ones, band combinations and band ratios have proven to be very useful tools for identifying targets. Lithology indexes point to reinforce the spectral response of this group of minerals working with band products and ratios. So far, these techniques do not need a full image correction. Other methods here employed require further processing of the ASTER scene, especially when spectral data are used. These techniques include spectral angle mapper (SAM) classification and minimum noise fraction (MNF) transforms to segregate noise and reduce computational requirements. Spectral data used in this paper were collected from field samples using SWIR (short wave infrared) reflectance spectroscopy and derived from the scene itself. These mapping methods have been tested in areas of known hydrothermal alteration occurrences, e.g. Los Pelambres, El Pachón and Altar, and in other sector of Santa Cruz region like Carnicerias and La Coipa; all of these at the south westernmost part of San Juan province. The result of this work is here presented as a series of images showing lithology indexes and an expected mineral assembly. Fil:Pérez, D.J. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. Fil:Godeas, M.C. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. 2010 info:eu-repo/semantics/article info:ar-repo/semantics/artículo info:eu-repo/semantics/publishedVersion application/pdf eng info:eu-repo/semantics/openAccess http://creativecommons.org/licenses/by/2.5/ar http://hdl.handle.net/20.500.12110/paper_00044822_v66_n4_p623_Perez
institution Universidad de Buenos Aires
institution_str I-28
repository_str R-134
collection Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA)
language Inglés
orig_language_str_mv eng
topic ASTER
Cordillera Frontal
Hydrothermal alteration
Miocene
Remote sensing
San Juan
ASTER
clay mineral
cordillera
hydrothermal alteration
hydrothermal deposit
lithology
Miocene
multispectral image
remote sensing
satellite data
Andes
Argentina
Cordillera Frontal
San Juan [Argentina]
Santa Cruz [Argentina]
Santa Cruz River [Santa Cruz]
spellingShingle ASTER
Cordillera Frontal
Hydrothermal alteration
Miocene
Remote sensing
San Juan
ASTER
clay mineral
cordillera
hydrothermal alteration
hydrothermal deposit
lithology
Miocene
multispectral image
remote sensing
satellite data
Andes
Argentina
Cordillera Frontal
San Juan [Argentina]
Santa Cruz [Argentina]
Santa Cruz River [Santa Cruz]
Pérez, D.J.
D'Odorico Benites, P.E.
Godeas, M.C.
Reconnaissance of hydrothermal alteration with the ASTER sensor, in the middle course of Río Santa Cruz (31°40' S), province of San Juan
topic_facet ASTER
Cordillera Frontal
Hydrothermal alteration
Miocene
Remote sensing
San Juan
ASTER
clay mineral
cordillera
hydrothermal alteration
hydrothermal deposit
lithology
Miocene
multispectral image
remote sensing
satellite data
Andes
Argentina
Cordillera Frontal
San Juan [Argentina]
Santa Cruz [Argentina]
Santa Cruz River [Santa Cruz]
description The advanced spaceborne thermal emission and reflection radiometer (ASTER) was used to identify different deposits of hydrothermal alteration which indicates that several important lithological groups can be mapped in areas with good exposure by using spectral-matching techniques. Different methods are tested in order to identify and map zones with hydrothermal alteration minerals using the ASTER dataset. These areas are often referred to having large quantities of clay minerals which can be detected using multispectral imagery. Several authors have developed different procedures to map these hydrothermal minerals. Among the simplest ones, band combinations and band ratios have proven to be very useful tools for identifying targets. Lithology indexes point to reinforce the spectral response of this group of minerals working with band products and ratios. So far, these techniques do not need a full image correction. Other methods here employed require further processing of the ASTER scene, especially when spectral data are used. These techniques include spectral angle mapper (SAM) classification and minimum noise fraction (MNF) transforms to segregate noise and reduce computational requirements. Spectral data used in this paper were collected from field samples using SWIR (short wave infrared) reflectance spectroscopy and derived from the scene itself. These mapping methods have been tested in areas of known hydrothermal alteration occurrences, e.g. Los Pelambres, El Pachón and Altar, and in other sector of Santa Cruz region like Carnicerias and La Coipa; all of these at the south westernmost part of San Juan province. The result of this work is here presented as a series of images showing lithology indexes and an expected mineral assembly.
format Artículo
Artículo
publishedVersion
author Pérez, D.J.
D'Odorico Benites, P.E.
Godeas, M.C.
author_facet Pérez, D.J.
D'Odorico Benites, P.E.
Godeas, M.C.
author_sort Pérez, D.J.
title Reconnaissance of hydrothermal alteration with the ASTER sensor, in the middle course of Río Santa Cruz (31°40' S), province of San Juan
title_short Reconnaissance of hydrothermal alteration with the ASTER sensor, in the middle course of Río Santa Cruz (31°40' S), province of San Juan
title_full Reconnaissance of hydrothermal alteration with the ASTER sensor, in the middle course of Río Santa Cruz (31°40' S), province of San Juan
title_fullStr Reconnaissance of hydrothermal alteration with the ASTER sensor, in the middle course of Río Santa Cruz (31°40' S), province of San Juan
title_full_unstemmed Reconnaissance of hydrothermal alteration with the ASTER sensor, in the middle course of Río Santa Cruz (31°40' S), province of San Juan
title_sort reconnaissance of hydrothermal alteration with the aster sensor, in the middle course of río santa cruz (31°40' s), province of san juan
publishDate 2010
url http://hdl.handle.net/20.500.12110/paper_00044822_v66_n4_p623_Perez
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AT godeasmc reconnaissanceofhydrothermalalterationwiththeastersensorinthemiddlecourseofriosantacruz3140sprovinceofsanjuan
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