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Hydrothermalisme anté-Hercynien en Sud-Ibérie : apport de la géochimie isotopique du plombPre-Hercynian hydrothermalism in South Iberia: lead isotope geochemistry constraints
| Content Provider | Semantic Scholar |
|---|---|
| Author | Marcoux, Eric |
| Copyright Year | 2002 |
| Abstract | Abstract Lead isotope study has been performed on massive sulphide deposits of Ossa-Morena and Aracena Belt (South Iberia). Results suggest the existence of at least two ancient hydrothermal events. The first one, Upper Brioverian in age (∼600–570 Ma), gave birth to Maria-Luisa and Puebla de la Reina massive sulphide deposits; it thus confirms the existence of a Cadomian orogen in South Iberia. Isotopic compositions indicate a local contribution of mantle-derived material (Maria Luisa mine), confirming the presence of ancient oceanic crust in Aracena Belt. This mineralising event seems to extend till the Armorican Massif. The second episode, Eo-Hercynian in age (∼400–350 Ma) has allowed genesis of massive sulphide deposits of la Nava Paredon and Aguas Blancas, and could be coeval with the emplacement of South-Iberian massive sulphide ore deposits in the neighbouring South-Portuguese Zone. A more continental crustal source for later ore deposits could explain the much more important metal accumulation in this zone. To cite this article: E. Marcoux et al., C. R. Geoscience 334 (2002) 259–265. |
| File Format | PDF HTM / HTML |
| DOI | 10.1016/S1631-0713(02)01734-0 |
| Alternate Webpage(s) | https://hal-insu.archives-ouvertes.fr/insu-00717727/document |
| Alternate Webpage(s) | https://doi.org/10.1016/S1631-0713%2802%2901734-0 |
| Language | English |
| Access Restriction | Open |
| Content Type | Text |
| Resource Type | Article |
