Skip to main content

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

Buy Article:

$39.00 plus tax (Refund Policy)


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.

Pendant le Jurassique Moyen et Supérieur un volcanisme de type bimodal s'est développé avec une tectonique amplement distribué sur le Massif du Deseado, Patagonie Argentine. Cette ambiance géologique favorise la formation de nombreux dépôts épithermaux en or-argent qui sont spatial et temporellement liés avec l'activité volcanique. Les limites d'âge des roches volcaniques qui sont les roches encaissantes définissent les âges Jurassiennes du volcanisme. Nouveaux études de SHRMP avec zircons provenant des ignimbrites des dépôts épithermaux Manantial Espejo et La Josefina sont présentées ici. Les données d'âge du prospect Manantial Espejo (∼ 167, ∼ 163 et 158.9 ± 0.45 Ma) suggèrent que la minéralisation a été placé 6 Ma après la formation de la roche encaissante. Les zircons du prospect La Josefina montrent un âge concordant de 152.7 ± 2.3 Ma qui suggère une juxtaposition entre le volcanisme et la minéralisation.


Document Type: Research Article


Publication date: 2009-07-01

More about this publication?
  • Neues Jahrbuch für Geologie und Paläontologie continuously publishes current original contributions from all fields of geology, ever since its foundation in 1807. All published contributions are in the English language.
  • Editorial Board
  • Information for Authors
  • Subscribe to this Title
  • Ingenta Connect is not responsible for the content or availability of external websites
  • Access Key
  • Free content
  • Partial Free content
  • New content
  • Open access content
  • Partial Open access content
  • Subscribed content
  • Partial Subscribed content
  • Free trial content
Cookie Policy
Cookie Policy
Ingenta Connect website makes use of cookies so as to keep track of data that you have filled in. I am Happy with this Find out more