Early Jurassic arc related magmatism associated with porphyry copper mineralization at Zafranal, Southern Peru unraveled by zircon U-Pb ages

ABSTRACT Early Jurassic arc-related igneous rocks host porphyry copper prospects and gold-bearing quartz vein deposits in southern Peru. Ten new zircon U-Pb ages for wall rocks of gold-bearing quartz veins, Jurassic rocks and copper-mineralized porphyry bodies in Zafranal porphyry copper, together w...

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Autores principales:	Santos,Alan, Weimin,Guo, Rivera,Fernando, Tassinari,Colombo, Cerpa,Luis, Kojima,Shoji
Lenguaje:	English
Publicado:	Servicio Nacional de Geología y Minería (SERNAGEOMIN) 2019
Materias:	Coastal Batholith Zafranal porphyry Early Jurassic U-Pb zircon age SHRIMP
Acceso en línea:	http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-71062019000300445
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spelling	oai:scielo:S0718-710620190003004452019-10-21Early Jurassic arc related magmatism associated with porphyry copper mineralization at Zafranal, Southern Peru unraveled by zircon U-Pb agesSantos,AlanWeimin,GuoRivera,FernandoTassinari,ColomboCerpa,LuisKojima,Shoji Coastal Batholith Zafranal porphyry Early Jurassic U-Pb zircon age SHRIMP ABSTRACT Early Jurassic arc-related igneous rocks host porphyry copper prospects and gold-bearing quartz vein deposits in southern Peru. Ten new zircon U-Pb ages for wall rocks of gold-bearing quartz veins, Jurassic rocks and copper-mineralized porphyry bodies in Zafranal porphyry copper, together with published ages for Jurassic rocks, reveal a continuous magmatic evolution of the early Jurassic arc. The Jurassic rocks and gold-bearing quartz vein systems in the western flank of the Western Cordillera are hosted by Paleo- and Meso-proterozoic orthogneisses of the Arequipa Massif (1.75-1.44 Ga) that underwent Grenville-age metamorphism ~1 Ga. The early mafic magmatism is recorded between 199.6-193.2 Ma, and was followed by dominantly felsic magmatism from 184.1-174.9 Ma. Both magmatic events have formed the thinnest intrusive belt (<15 km wide) of the Coastal Batholith in southern Peru. The last magmatic event of the early Jurassic (181.0-174.9 Ma) is represented by several phases of porphyries associated with copper mineralization in the Zafranal porphyry copper deposit. The published ages indicate that the magmatic arc migrated along eastern limit of the Arequipa Massif during Middle Jurassic. In the late Jurassic (~146 Ma) the magmatic locus returned near early Jurassic intrusion. Overall, the plutonic intrusive rocks and porphyry bodies with copper mineralization represent the oldest magmatic events of the Coastal Batholith of Peru formed during the early Jurassic.info:eu-repo/semantics/openAccessServicio Nacional de Geología y Minería (SERNAGEOMIN)Andean geology v.46 n.3 20192019-09-01text/htmlhttp://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-71062019000300445en10.5027/andgeov46n3-3041
institution	Scielo Chile
collection	Scielo Chile
language	English
topic	Coastal Batholith Zafranal porphyry Early Jurassic U-Pb zircon age SHRIMP
spellingShingle	Coastal Batholith Zafranal porphyry Early Jurassic U-Pb zircon age SHRIMP Santos,Alan Weimin,Guo Rivera,Fernando Tassinari,Colombo Cerpa,Luis Kojima,Shoji Early Jurassic arc related magmatism associated with porphyry copper mineralization at Zafranal, Southern Peru unraveled by zircon U-Pb ages
description	ABSTRACT Early Jurassic arc-related igneous rocks host porphyry copper prospects and gold-bearing quartz vein deposits in southern Peru. Ten new zircon U-Pb ages for wall rocks of gold-bearing quartz veins, Jurassic rocks and copper-mineralized porphyry bodies in Zafranal porphyry copper, together with published ages for Jurassic rocks, reveal a continuous magmatic evolution of the early Jurassic arc. The Jurassic rocks and gold-bearing quartz vein systems in the western flank of the Western Cordillera are hosted by Paleo- and Meso-proterozoic orthogneisses of the Arequipa Massif (1.75-1.44 Ga) that underwent Grenville-age metamorphism ~1 Ga. The early mafic magmatism is recorded between 199.6-193.2 Ma, and was followed by dominantly felsic magmatism from 184.1-174.9 Ma. Both magmatic events have formed the thinnest intrusive belt (<15 km wide) of the Coastal Batholith in southern Peru. The last magmatic event of the early Jurassic (181.0-174.9 Ma) is represented by several phases of porphyries associated with copper mineralization in the Zafranal porphyry copper deposit. The published ages indicate that the magmatic arc migrated along eastern limit of the Arequipa Massif during Middle Jurassic. In the late Jurassic (~146 Ma) the magmatic locus returned near early Jurassic intrusion. Overall, the plutonic intrusive rocks and porphyry bodies with copper mineralization represent the oldest magmatic events of the Coastal Batholith of Peru formed during the early Jurassic.
author	Santos,Alan Weimin,Guo Rivera,Fernando Tassinari,Colombo Cerpa,Luis Kojima,Shoji
author_facet	Santos,Alan Weimin,Guo Rivera,Fernando Tassinari,Colombo Cerpa,Luis Kojima,Shoji
author_sort	Santos,Alan
title	Early Jurassic arc related magmatism associated with porphyry copper mineralization at Zafranal, Southern Peru unraveled by zircon U-Pb ages
title_short	Early Jurassic arc related magmatism associated with porphyry copper mineralization at Zafranal, Southern Peru unraveled by zircon U-Pb ages
title_full	Early Jurassic arc related magmatism associated with porphyry copper mineralization at Zafranal, Southern Peru unraveled by zircon U-Pb ages
title_fullStr	Early Jurassic arc related magmatism associated with porphyry copper mineralization at Zafranal, Southern Peru unraveled by zircon U-Pb ages
title_full_unstemmed	Early Jurassic arc related magmatism associated with porphyry copper mineralization at Zafranal, Southern Peru unraveled by zircon U-Pb ages
title_sort	early jurassic arc related magmatism associated with porphyry copper mineralization at zafranal, southern peru unraveled by zircon u-pb ages
publisher	Servicio Nacional de Geología y Minería (SERNAGEOMIN)
publishDate	2019
url	http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-71062019000300445
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Early Jurassic arc related magmatism associated with porphyry copper mineralization at Zafranal, Southern Peru unraveled by zircon U-Pb ages

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