Re-Os molybdenite and LA-ICPMS-MC U-Pb zircon geochronology for the Milpillas porphyry copper deposit: insights for the timing of mineralization in the Cananea District, Sonora, Mexico
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| Natura: | Artículo científico |
| Lingua: | en |
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Universidad Nacional Autónoma de México
2006
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| author | Fernando Barra |
| author_facet | Fernando Barra |
| contents | Re-Os molybdenite and LA-ICPMS-MC U-Pb zircon geochronology for the Milpillas porphyry copper deposit: insights for the timing of mineralization in the Cananea District, Sonora, Mexico Fernando Barra Francisco Quintanar Víctor A. Valencia Benito Noguez Alcántara Joaquín Ruiz George Gehrels Martín Valencia Moreno Ciencias de la Tierra Pb Re Os Mexico Cananea New geochronological data presented here improves the understanding of the temporal evolutionof the Cananea Mining District, and particularly of the Milpillas porphyry copper deposit (northeasternSonora, Mexico). Uranium-lead zircon analyses, using laser ablation ICP-MS multi-collector, fromthe quartz monzonite porphyry unit that host the mineralization at the Milpillas deposit, yielded acrystallization age of 63.9 ± 1.3 Ma (2-sigma). Re-Os molybdenite ages from two drill core samplesfrom more than 500 m depth yielded an identical age of 63.1 ± 0.4 Ma (2-sigma), suggesting a restrictedperiod of mineralization. These ages indicate that the Milpillas deposit is the oldest Laramide porphyrycopper deposit recognized so far in the Cananea District.Our new Re-Os data in addition to previous Re-Os data, suggest that mineralization within thedistrict, occurred within a ~4 m.y. period in three discrete pulses at ~59 Ma, ~61 Ma and ~63 Ma. Thisis in contrast to the previous model in which mineralization at the Cananea District was the result of acontinuous hydrothermal system that started at ~62 Ma and ended at ~52 Ma. 2006 artículo científico 1026-8774 https://www.redalyc.org/articulo.oa?id=57230103 en http://www.redalyc.org/revista.oa?id=572 Revista Mexicana de Ciencias Geológicas application/pdf Universidad Nacional Autónoma de México Revista Mexicana de Ciencias Geológicas (México) Num.1 Vol.23 |
| format | Artículo científico |
| id | redalyc_57230103 |
| institution | Redalyc |
| language | en |
| publishDate | 2006 |
| publisher | Universidad Nacional Autónoma de México |
| spellingShingle | Re-Os molybdenite and LA-ICPMS-MC U-Pb zircon geochronology for the Milpillas porphyry copper deposit: insights for the timing of mineralization in the Cananea District, Sonora, Mexico Fernando Barra Ciencias de la Tierra Pb Re Os Mexico Cananea Re-Os molybdenite and LA-ICPMS-MC U-Pb zircon geochronology for the Milpillas porphyry copper deposit: insights for the timing of mineralization in the Cananea District, Sonora, Mexico Fernando Barra Francisco Quintanar Víctor A. Valencia Benito Noguez Alcántara Joaquín Ruiz George Gehrels Martín Valencia Moreno Ciencias de la Tierra Pb Re Os Mexico Cananea New geochronological data presented here improves the understanding of the temporal evolutionof the Cananea Mining District, and particularly of the Milpillas porphyry copper deposit (northeasternSonora, Mexico). Uranium-lead zircon analyses, using laser ablation ICP-MS multi-collector, fromthe quartz monzonite porphyry unit that host the mineralization at the Milpillas deposit, yielded acrystallization age of 63.9 ± 1.3 Ma (2-sigma). Re-Os molybdenite ages from two drill core samplesfrom more than 500 m depth yielded an identical age of 63.1 ± 0.4 Ma (2-sigma), suggesting a restrictedperiod of mineralization. These ages indicate that the Milpillas deposit is the oldest Laramide porphyrycopper deposit recognized so far in the Cananea District.Our new Re-Os data in addition to previous Re-Os data, suggest that mineralization within thedistrict, occurred within a ~4 m.y. period in three discrete pulses at ~59 Ma, ~61 Ma and ~63 Ma. Thisis in contrast to the previous model in which mineralization at the Cananea District was the result of acontinuous hydrothermal system that started at ~62 Ma and ended at ~52 Ma. 2006 artículo científico 1026-8774 https://www.redalyc.org/articulo.oa?id=57230103 en http://www.redalyc.org/revista.oa?id=572 Revista Mexicana de Ciencias Geológicas application/pdf Universidad Nacional Autónoma de México Revista Mexicana de Ciencias Geológicas (México) Num.1 Vol.23 |
| title | Re-Os molybdenite and LA-ICPMS-MC U-Pb zircon geochronology for the Milpillas porphyry copper deposit: insights for the timing of mineralization in the Cananea District, Sonora, Mexico |
| topic | Ciencias de la Tierra Pb Re Os Mexico Cananea |
| url | https://www.redalyc.org/articulo.oa?id=57230103 |