Compositional variations revealed by ASTER image analysis of the Viedma Volcano, southern Andes Volcanic Zone

We conducted a lithological mapping of the Viedma volcano, one of five volcanoes in the Andean Austral Volcanic Zone (AVZ), using remote sensing techniques. We used data of the Advanced Spaceborne Thermal Emission and Reflection radiometer (ASTER) sensor which is highly effective in geological resea...

Descripción completa

Guardado en:

Detalles Bibliográficos
Autores principales:	Kobayashi,Chiaki, Orihashi,Yuji, Hiarata,Daiji, Naranjo,José A, Kobayashi,Makoto, Anma,Ryo
Lenguaje:	English
Publicado:	Servicio Nacional de Geología y Minería (SERNAGEOMIN) 2010
Materias:	ASTER Viedma volcano SiO2 wt% Andean Austral Volcanic Zone Chile
Acceso en línea:	http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-71062010000200009
Etiquetas:	Agregar Etiqueta Sin Etiquetas, Sea el primero en etiquetar este registro!

id	oai:scielo:S0718-71062010000200009
record_format	dspace
spelling	oai:scielo:S0718-710620100002000092010-10-06Compositional variations revealed by ASTER image analysis of the Viedma Volcano, southern Andes Volcanic ZoneKobayashi,ChiakiOrihashi,YujiHiarata,DaijiNaranjo,José AKobayashi,MakotoAnma,Ryo ASTER Viedma volcano SiO2 wt% Andean Austral Volcanic Zone Chile We conducted a lithological mapping of the Viedma volcano, one of five volcanoes in the Andean Austral Volcanic Zone (AVZ), using remote sensing techniques. We used data of the Advanced Spaceborne Thermal Emission and Reflection radiometer (ASTER) sensor which is highly effective in geological research, to understand build-up processes and to deduce compositional variation of the Viedma volcano emerging from the South Patagonian ice field. The volcanic edifice was divided into bright parts that mainly compose the eastern flank of the volcano and dark parts at the central crater area based on the observation in visible and near infrared ranges. The SiO2 concentration was cal-culated using the bands in the visible and thermal infrared regions. The dark part and the bright part have approximately 51 wt% and 63 wt% average SiO2 content respectively, indicating that the exposures of the Viedma volcano have a wide variation in SiO2 concentration. Although, according to other authors, ejecta from the Viedma volcano have 64-66 wt% SiO2 and other AV Z volcanoes are essentially monolithologic dacite/andesite volcanoes, the edifice of the Viedma volcano appears to be composed mostly of basalts or older rocks/basement with low silica contents.info:eu-repo/semantics/openAccessServicio Nacional de Geología y Minería (SERNAGEOMIN)Andean geology v.37 n.2 20102010-07-01text/htmlhttp://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-71062010000200009en
institution	Scielo Chile
collection	Scielo Chile
language	English
topic	ASTER Viedma volcano SiO2 wt% Andean Austral Volcanic Zone Chile
spellingShingle	ASTER Viedma volcano SiO2 wt% Andean Austral Volcanic Zone Chile Kobayashi,Chiaki Orihashi,Yuji Hiarata,Daiji Naranjo,José A Kobayashi,Makoto Anma,Ryo Compositional variations revealed by ASTER image analysis of the Viedma Volcano, southern Andes Volcanic Zone
description	We conducted a lithological mapping of the Viedma volcano, one of five volcanoes in the Andean Austral Volcanic Zone (AVZ), using remote sensing techniques. We used data of the Advanced Spaceborne Thermal Emission and Reflection radiometer (ASTER) sensor which is highly effective in geological research, to understand build-up processes and to deduce compositional variation of the Viedma volcano emerging from the South Patagonian ice field. The volcanic edifice was divided into bright parts that mainly compose the eastern flank of the volcano and dark parts at the central crater area based on the observation in visible and near infrared ranges. The SiO2 concentration was cal-culated using the bands in the visible and thermal infrared regions. The dark part and the bright part have approximately 51 wt% and 63 wt% average SiO2 content respectively, indicating that the exposures of the Viedma volcano have a wide variation in SiO2 concentration. Although, according to other authors, ejecta from the Viedma volcano have 64-66 wt% SiO2 and other AV Z volcanoes are essentially monolithologic dacite/andesite volcanoes, the edifice of the Viedma volcano appears to be composed mostly of basalts or older rocks/basement with low silica contents.
author	Kobayashi,Chiaki Orihashi,Yuji Hiarata,Daiji Naranjo,José A Kobayashi,Makoto Anma,Ryo
author_facet	Kobayashi,Chiaki Orihashi,Yuji Hiarata,Daiji Naranjo,José A Kobayashi,Makoto Anma,Ryo
author_sort	Kobayashi,Chiaki
title	Compositional variations revealed by ASTER image analysis of the Viedma Volcano, southern Andes Volcanic Zone
title_short	Compositional variations revealed by ASTER image analysis of the Viedma Volcano, southern Andes Volcanic Zone
title_full	Compositional variations revealed by ASTER image analysis of the Viedma Volcano, southern Andes Volcanic Zone
title_fullStr	Compositional variations revealed by ASTER image analysis of the Viedma Volcano, southern Andes Volcanic Zone
title_full_unstemmed	Compositional variations revealed by ASTER image analysis of the Viedma Volcano, southern Andes Volcanic Zone
title_sort	compositional variations revealed by aster image analysis of the viedma volcano, southern andes volcanic zone
publisher	Servicio Nacional de Geología y Minería (SERNAGEOMIN)
publishDate	2010
url	http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-71062010000200009
work_keys_str_mv	AT kobayashichiaki compositionalvariationsrevealedbyasterimageanalysisoftheviedmavolcanosouthernandesvolcaniczone AT orihashiyuji compositionalvariationsrevealedbyasterimageanalysisoftheviedmavolcanosouthernandesvolcaniczone AT hiaratadaiji compositionalvariationsrevealedbyasterimageanalysisoftheviedmavolcanosouthernandesvolcaniczone AT naranjojosea compositionalvariationsrevealedbyasterimageanalysisoftheviedmavolcanosouthernandesvolcaniczone AT kobayashimakoto compositionalvariationsrevealedbyasterimageanalysisoftheviedmavolcanosouthernandesvolcaniczone AT anmaryo compositionalvariationsrevealedbyasterimageanalysisoftheviedmavolcanosouthernandesvolcaniczone
_version_	1714205829337448448

Compositional variations revealed by ASTER image analysis of the Viedma Volcano, southern Andes Volcanic Zone

Ejemplares similares