Depositional age of Jurassic epithermal gold-silver ore in the Deseado Massif, Patagonia, Argentina, based on Manantial Espejo and La Josefina prospects

P. Moreira; H. Echeveste; R. Fernandez; L.A. Hartmann; I. Schalamuk; Joao Santos

doi:10.1127/0077-7749/2009/0253-0025

Depositional age of Jurassic epithermal gold-silver ore in the Deseado Massif, Patagonia, Argentina, based on Manantial Espejo and La Josefina prospects

P. Moreira, H. Echeveste, R. Fernandez, L.A. Hartmann, I. Schalamuk, Joao Santos

Research output: Contribution to journal › Article › peer-review

13 Citations (Scopus)

Abstract

Middle to Upper Jurassic bimodal volcanism developed during widespread extensional tectonism within the Deseado Massif in Argentinean Patagonia. This geologic environment led to the formation of numerous epithermal gold-silver deposits that are spatially and temporally related to the volcanic activity. The age constraints of the volcanic rocks that host the veins define Upper Jurassic ages for the volcanism. New U-Pb SHRIMP studies of zircons from ignimbrites from Manantial Espejo and La Josefina epithermal prospects are reported. The Manantial Espejo prospect dates (∼ 167, ∼ 163 and 158.9 ± 0.45 Ma) suggest that mineralization took place 6 My after the deposition of the host rock. The zircons of La Josefina prospect show a concordant age of 152.7 ± 2.3 Ma that suggests temporal overlapping between volcanism and mineralization.

Original language	English
Pages (from-to)	25-40
Journal	Neues Jahrbuch Fur Geologie Und Palaontologie-Abhandlungen
Volume	253
Issue number	1
DOIs	https://doi.org/10.1127/0077-7749/2009/0253-0025
Publication status	Published - 2009

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Moreira, P., Echeveste, H., Fernandez, R., Hartmann, L. A., Schalamuk, I., & Santos, J. (2009). Depositional age of Jurassic epithermal gold-silver ore in the Deseado Massif, Patagonia, Argentina, based on Manantial Espejo and La Josefina prospects. Neues Jahrbuch Fur Geologie Und Palaontologie-Abhandlungen, 253(1), 25-40. https://doi.org/10.1127/0077-7749/2009/0253-0025

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title = "Depositional age of Jurassic epithermal gold-silver ore in the Deseado Massif, Patagonia, Argentina, based on Manantial Espejo and La Josefina prospects",

abstract = "Middle to Upper Jurassic bimodal volcanism developed during widespread extensional tectonism within the Deseado Massif in Argentinean Patagonia. This geologic environment led to the formation of numerous epithermal gold-silver deposits that are spatially and temporally related to the volcanic activity. The age constraints of the volcanic rocks that host the veins define Upper Jurassic ages for the volcanism. New U-Pb SHRIMP studies of zircons from ignimbrites from Manantial Espejo and La Josefina epithermal prospects are reported. The Manantial Espejo prospect dates (∼ 167, ∼ 163 and 158.9 ± 0.45 Ma) suggest that mineralization took place 6 My after the deposition of the host rock. The zircons of La Josefina prospect show a concordant age of 152.7 ± 2.3 Ma that suggests temporal overlapping between volcanism and mineralization.",

author = "P. Moreira and H. Echeveste and R. Fernandez and L.A. Hartmann and I. Schalamuk and Joao Santos",

year = "2009",

doi = "10.1127/0077-7749/2009/0253-0025",

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Moreira, P, Echeveste, H, Fernandez, R, Hartmann, LA, Schalamuk, I & Santos, J 2009, 'Depositional age of Jurassic epithermal gold-silver ore in the Deseado Massif, Patagonia, Argentina, based on Manantial Espejo and La Josefina prospects', Neues Jahrbuch Fur Geologie Und Palaontologie-Abhandlungen, vol. 253, no. 1, pp. 25-40. https://doi.org/10.1127/0077-7749/2009/0253-0025

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AU - Moreira, P.

AU - Echeveste, H.

AU - Fernandez, R.

AU - Hartmann, L.A.

AU - Schalamuk, I.

AU - Santos, Joao

PY - 2009

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AB - Middle to Upper Jurassic bimodal volcanism developed during widespread extensional tectonism within the Deseado Massif in Argentinean Patagonia. This geologic environment led to the formation of numerous epithermal gold-silver deposits that are spatially and temporally related to the volcanic activity. The age constraints of the volcanic rocks that host the veins define Upper Jurassic ages for the volcanism. New U-Pb SHRIMP studies of zircons from ignimbrites from Manantial Espejo and La Josefina epithermal prospects are reported. The Manantial Espejo prospect dates (∼ 167, ∼ 163 and 158.9 ± 0.45 Ma) suggest that mineralization took place 6 My after the deposition of the host rock. The zircons of La Josefina prospect show a concordant age of 152.7 ± 2.3 Ma that suggests temporal overlapping between volcanism and mineralization.

U2 - 10.1127/0077-7749/2009/0253-0025

DO - 10.1127/0077-7749/2009/0253-0025

M3 - Article

VL - 253

SP - 25

EP - 40

JO - Neues Jahrbuch Fur Geologie und Palaontologie - Abhandlungen

JF - Neues Jahrbuch Fur Geologie und Palaontologie - Abhandlungen

SN - 0028-3630

IS - 1

ER -

Depositional age of Jurassic epithermal gold-silver ore in the Deseado Massif, Patagonia, Argentina, based on Manantial Espejo and La Josefina prospects

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