Mineralogy of the Panulcillo skarn copper deposit, Coquimbo Region, Chile

The Panulcillo skarn copper deposit developed in an Early Cretaceous (Valanginian) volcano-sedimentary sequence intruded by a Cretaceous diorite. The exoskarn zone of the deposit is composed of garnet skarn comprising grandite garnet (Ad12.9-47.4) and phlogopite with lesser amounts of diopside (Di89...

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Autores principales:	Sugaki,Asahiko, Campos,Eduardo, Kojima,Shoji
Lenguaje:	English
Publicado:	Servicio Nacional de Geología y Minería (SERNAGEOMIN) 2000
Materias:	Cretaceous mineralization Diorite Grandite garnet Magnesian skarn Monoclinic pyrrhotite Low sulfidation Panulcillo copper deposit Chile
Acceso en línea:	http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0716-02082000000200001
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spelling	oai:scielo:S0716-020820000002000012001-03-26Mineralogy of the Panulcillo skarn copper deposit, Coquimbo Region, ChileSugaki,AsahikoCampos,EduardoKojima,Shoji Cretaceous mineralization Diorite Grandite garnet Magnesian skarn Monoclinic pyrrhotite Low sulfidation Panulcillo copper deposit Chile The Panulcillo skarn copper deposit developed in an Early Cretaceous (Valanginian) volcano-sedimentary sequence intruded by a Cretaceous diorite. The exoskarn zone of the deposit is composed of garnet skarn comprising grandite garnet (Ad12.9-47.4) and phlogopite with lesser amounts of diopside (Di89.6-91.6), clintonite, pargasitic hornblende, actinolite, pumpellyite, chlorite, quartz and calcite, exhibiting characteristic Mg-Al-rich assemblages. The principal ores consist of chalcopyrite, monoclinic pyrrhotite, sphalerite, pyrite, and magnetite with small amounts of galena, and locally secondary marcasite, hematite and covellite, generally filling interstices of the garnet skarn. Chalcopyrite shows characteristic polysynthetic twinning, normally including fine star-like crystals of sphalerite as exsolution products. Sphalerite contains 14.4 - 22.5 mol% FeS and 1.6 - 9.2 mol% MnS, and is associated intimately with chalcopyrite. It is highly likely that such Fe-rich sphalerite has coexisted primarily with hexagonal pyrrhotite under low-sulfidation conditions at higher temperatures than 275 - 254°C, below which monoclinic pyrrhotite is stableinfo:eu-repo/semantics/openAccessServicio Nacional de Geología y Minería (SERNAGEOMIN)Revista geológica de Chile v.27 n.2 20002000-12-01text/htmlhttp://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0716-02082000000200001en10.4067/S0716-02082000000200001
institution	Scielo Chile
collection	Scielo Chile
language	English
topic	Cretaceous mineralization Diorite Grandite garnet Magnesian skarn Monoclinic pyrrhotite Low sulfidation Panulcillo copper deposit Chile
spellingShingle	Cretaceous mineralization Diorite Grandite garnet Magnesian skarn Monoclinic pyrrhotite Low sulfidation Panulcillo copper deposit Chile Sugaki,Asahiko Campos,Eduardo Kojima,Shoji Mineralogy of the Panulcillo skarn copper deposit, Coquimbo Region, Chile
description	The Panulcillo skarn copper deposit developed in an Early Cretaceous (Valanginian) volcano-sedimentary sequence intruded by a Cretaceous diorite. The exoskarn zone of the deposit is composed of garnet skarn comprising grandite garnet (Ad12.9-47.4) and phlogopite with lesser amounts of diopside (Di89.6-91.6), clintonite, pargasitic hornblende, actinolite, pumpellyite, chlorite, quartz and calcite, exhibiting characteristic Mg-Al-rich assemblages. The principal ores consist of chalcopyrite, monoclinic pyrrhotite, sphalerite, pyrite, and magnetite with small amounts of galena, and locally secondary marcasite, hematite and covellite, generally filling interstices of the garnet skarn. Chalcopyrite shows characteristic polysynthetic twinning, normally including fine star-like crystals of sphalerite as exsolution products. Sphalerite contains 14.4 - 22.5 mol% FeS and 1.6 - 9.2 mol% MnS, and is associated intimately with chalcopyrite. It is highly likely that such Fe-rich sphalerite has coexisted primarily with hexagonal pyrrhotite under low-sulfidation conditions at higher temperatures than 275 - 254°C, below which monoclinic pyrrhotite is stable
author	Sugaki,Asahiko Campos,Eduardo Kojima,Shoji
author_facet	Sugaki,Asahiko Campos,Eduardo Kojima,Shoji
author_sort	Sugaki,Asahiko
title	Mineralogy of the Panulcillo skarn copper deposit, Coquimbo Region, Chile
title_short	Mineralogy of the Panulcillo skarn copper deposit, Coquimbo Region, Chile
title_full	Mineralogy of the Panulcillo skarn copper deposit, Coquimbo Region, Chile
title_fullStr	Mineralogy of the Panulcillo skarn copper deposit, Coquimbo Region, Chile
title_full_unstemmed	Mineralogy of the Panulcillo skarn copper deposit, Coquimbo Region, Chile
title_sort	mineralogy of the panulcillo skarn copper deposit, coquimbo region, chile
publisher	Servicio Nacional de Geología y Minería (SERNAGEOMIN)
publishDate	2000
url	http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0716-02082000000200001
work_keys_str_mv	AT sugakiasahiko mineralogyofthepanulcilloskarncopperdepositcoquimboregionchile AT camposeduardo mineralogyofthepanulcilloskarncopperdepositcoquimboregionchile AT kojimashoji mineralogyofthepanulcilloskarncopperdepositcoquimboregionchile
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Mineralogy of the Panulcillo skarn copper deposit, Coquimbo Region, Chile

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