The Arroyo La Chilca-Zanjón del Buitre alteration zone, San Rafael Massif, Mendoza

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The Arroyo La Chilca-Zanjón del Buitre alteration zone, San Rafael Massif, Mendoza. The Arroyo La Chilca-Zanjón del Buitre alteration zone is located in the San Rafael Massif (35°24'8" S; 68°19'25,8" W), Mendoza. Previous works defined preliminary this deposit as a porphyry coppe...

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Autores principales: Rubinstein, N., Gómez, A., Mallimacci, H.
Formato: JOUR
Materias:
Choiyoi Magmatic Cycle lower section
Hydrothermal alteration
Metals geochemistry
Porphyry copper
San rafael massif
breccia
copper
geochemistry
hydrothermal alteration
ignimbrite
lava flow
magmatism
mineralization
ore deposit
Permian
porphyry
quartz vein
sandstone
Argentina
Mendoza
San Rafael Massif
Acceso en línea:http://hdl.handle.net/20.500.12110/paper_00044822_v69_n2_p287_Rubinstein
Aporte de:
Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) de Universidad de Buenos Aires
id todo:paper_00044822_v69_n2_p287_Rubinstein
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spelling todo:paper_00044822_v69_n2_p287_Rubinstein2023-10-03T13:58:58Z The Arroyo La Chilca-Zanjón del Buitre alteration zone, San Rafael Massif, Mendoza Rubinstein, N. Gómez, A. Mallimacci, H. Choiyoi Magmatic Cycle lower section Hydrothermal alteration Metals geochemistry Porphyry copper San rafael massif breccia copper geochemistry hydrothermal alteration ignimbrite lava flow magmatism mineralization ore deposit Permian porphyry quartz vein sandstone Argentina Mendoza San Rafael Massif The Arroyo La Chilca-Zanjón del Buitre alteration zone, San Rafael Massif, Mendoza. The Arroyo La Chilca-Zanjón del Buitre alteration zone is located in the San Rafael Massif (35°24'8" S; 68°19'25,8" W), Mendoza. Previous works defined preliminary this deposit as a porphyry copper system genetically linked to the gondwanan magmatism. This alteration zone is hosted by a sequence composed of ignimbritic breccias and ignimbrites of trachyandesitic composition with interbedded tuffaceous sandstones and andesitic lavas flows intruded by trachyandesitic-dacitic and andesitic hypabyssal bodies. The lithology and geochemistry of the volcanic sequence confirm the link with the Choiyoi Magmatic Cycle lower section (Lower Permian). The alteration zone consists of a potassic halo with a parageneses of K-feldspar-quartzmagnetite overprinted by phyllic alteration with an assemblage of quartz-muscovite-pyrite-(rutile) and quartz -pyrite veins. A late carbonatization process overprints both the potassic and phyllic alteration. Outside the alteration zone pyrite-chalcopyrite- galena-sphalerite veins with quartz gangue crop out. Metals geochemistry shows moderate Ag and Au anomalies and little Cu, Mo, Pb and Zn anomalies. Statistical analyses allow defining one Cu-Mo mineralizing stage and another Mo mineralizing stage only recognized in Zanjón del Buitre. Moreover, two Zn mineralizing stages, one of them probably genetically related to the Cu stage, were also recognized. Fil:Rubinstein, N. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. Fil:Gómez, A. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. JOUR info:eu-repo/semantics/openAccess http://creativecommons.org/licenses/by/2.5/ar http://hdl.handle.net/20.500.12110/paper_00044822_v69_n2_p287_Rubinstein
institution Universidad de Buenos Aires
institution_str I-28
repository_str R-134
collection Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA)
topic Choiyoi Magmatic Cycle lower section
Hydrothermal alteration
Metals geochemistry
Porphyry copper
San rafael massif
breccia
copper
geochemistry
hydrothermal alteration
ignimbrite
lava flow
magmatism
mineralization
ore deposit
Permian
porphyry
quartz vein
sandstone
Argentina
Mendoza
San Rafael Massif
spellingShingle Choiyoi Magmatic Cycle lower section
Hydrothermal alteration
Metals geochemistry
Porphyry copper
San rafael massif
breccia
copper
geochemistry
hydrothermal alteration
ignimbrite
lava flow
magmatism
mineralization
ore deposit
Permian
porphyry
quartz vein
sandstone
Argentina
Mendoza
San Rafael Massif
Rubinstein, N.
Gómez, A.
Mallimacci, H.
The Arroyo La Chilca-Zanjón del Buitre alteration zone, San Rafael Massif, Mendoza
topic_facet Choiyoi Magmatic Cycle lower section
Hydrothermal alteration
Metals geochemistry
Porphyry copper
San rafael massif
breccia
copper
geochemistry
hydrothermal alteration
ignimbrite
lava flow
magmatism
mineralization
ore deposit
Permian
porphyry
quartz vein
sandstone
Argentina
Mendoza
San Rafael Massif
description The Arroyo La Chilca-Zanjón del Buitre alteration zone, San Rafael Massif, Mendoza. The Arroyo La Chilca-Zanjón del Buitre alteration zone is located in the San Rafael Massif (35°24'8" S; 68°19'25,8" W), Mendoza. Previous works defined preliminary this deposit as a porphyry copper system genetically linked to the gondwanan magmatism. This alteration zone is hosted by a sequence composed of ignimbritic breccias and ignimbrites of trachyandesitic composition with interbedded tuffaceous sandstones and andesitic lavas flows intruded by trachyandesitic-dacitic and andesitic hypabyssal bodies. The lithology and geochemistry of the volcanic sequence confirm the link with the Choiyoi Magmatic Cycle lower section (Lower Permian). The alteration zone consists of a potassic halo with a parageneses of K-feldspar-quartzmagnetite overprinted by phyllic alteration with an assemblage of quartz-muscovite-pyrite-(rutile) and quartz -pyrite veins. A late carbonatization process overprints both the potassic and phyllic alteration. Outside the alteration zone pyrite-chalcopyrite- galena-sphalerite veins with quartz gangue crop out. Metals geochemistry shows moderate Ag and Au anomalies and little Cu, Mo, Pb and Zn anomalies. Statistical analyses allow defining one Cu-Mo mineralizing stage and another Mo mineralizing stage only recognized in Zanjón del Buitre. Moreover, two Zn mineralizing stages, one of them probably genetically related to the Cu stage, were also recognized.
format JOUR
author Rubinstein, N.
Gómez, A.
Mallimacci, H.
author_facet Rubinstein, N.
Gómez, A.
Mallimacci, H.
author_sort Rubinstein, N.
title The Arroyo La Chilca-Zanjón del Buitre alteration zone, San Rafael Massif, Mendoza
title_short The Arroyo La Chilca-Zanjón del Buitre alteration zone, San Rafael Massif, Mendoza
title_full The Arroyo La Chilca-Zanjón del Buitre alteration zone, San Rafael Massif, Mendoza
title_fullStr The Arroyo La Chilca-Zanjón del Buitre alteration zone, San Rafael Massif, Mendoza
title_full_unstemmed The Arroyo La Chilca-Zanjón del Buitre alteration zone, San Rafael Massif, Mendoza
title_sort arroyo la chilca-zanjón del buitre alteration zone, san rafael massif, mendoza
url http://hdl.handle.net/20.500.12110/paper_00044822_v69_n2_p287_Rubinstein
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