| Data: |
2021 |
| Resum: |
Cerro Quema is a high-sulfidation epithermal Au-Cu deposit located in the Azuero Peninsula, southwestern Panama. It is hosted by a dacite dome complex of the Río Quema Formation, a volcano-sedimentary sequence of the Panamanian Cretaceous-Paleogene magmatic arc. Cerro Quema has oxide resources of 24. 60 Mt at 0. 71 g/t Au and 0. 04% Cu, and sulfide resources of 11. 38 Mt at 0. 41 g/t Au and 0. 31% Cu. Alunite 40Ar/39Ar dating of a sample from Cerro Quema yielded a final age of 48. 8 ± 2. 2 Ma (weighted average of plateau age) and 49. 2 ± 3. 3 Ma (weighted average of total gas age). This age is interpreted to represent the formational age of the Cerro Quema deposit at ~49 Ma, linking it to the Valle Rico batholith intrusive event. Based on the new alunite 40Ar/39Ar data and a reexamination of published geochronological data, magmatic-hydrothermal deposits such as the Río Pito porphyry copper and the Cerro Quema high-sulfidation epithermal deposit formed during the early arc stage (68-40 Ma) in the Chagres-Bayano arc (eastern Panama) and the Soná-Azuero arc (western Panama), respectively. They formed in a similar geodynamic setting at ~49 Ma, when diorites and quartz-diorites intruded Cretaceous volcano-sedimentary sequences. Cerro Quema and Río Pito provide evidence for the exploration potential of Cretaceous-Paleogene arc segments. Exploration should focus on Cretaceous volcanic and volcano-sedimentary sequences intruded by Paleogene batholiths of intermediate to felsic composition. |
| Drets: |
Aquest material està protegit per drets d'autor i/o drets afins. Podeu utilitzar aquest material en funció del que permet la legislació de drets d'autor i drets afins d'aplicació al vostre cas. Per a d'altres usos heu d'obtenir permís del(s) titular(s) de drets.  |
| Llengua: |
Anglès |
| Document: |
Article ; recerca ; Versió acceptada per publicar |
| Publicat a: |
Economic Geology, Vol. 116, Num. 1 (January 2021) , p. 211-226, ISSN 1554-0774 |
visitant ::
identificació
(James Cook University)
