Datos preliminares sobre el metamorfismo de la Sierra de Pie de
Palo, Sierras Pampeanas Occidentales (Argentina)
dc.contributor.author | Baldo, Edgardo G. | |
dc.contributor.author | Casquet Martín, César | |
dc.contributor.author | Galindo Francisco, María Del Carmen | |
dc.date.accessioned | 2023-06-20T16:46:15Z | |
dc.date.available | 2023-06-20T16:46:15Z | |
dc.date.issued | 1998 | |
dc.description.abstract | The Sierra de Pie de Palo belongs to the Western Sierras Pampeanas. Although still poorly known in detail, the sierra consists of a relatively autochthonous sequence of shelf sediments metamorphosed to low grade (the Caucete Group) and an allochthonous complex of polymetamorphic medium-to-high grade igneous and sedimentary rocks thrust towards the west and northwest. Mylonitization is widespread. Radiometric dating by different methods (U-Pb, 4°Ar/39Ar and K-Ar) suggests that at least two tectonothermal events are present in the allochthonous: Grenville (ca. 1 Ga) and Famatinian (480-312Ma). Metamorphism has been studied in a Ca-rich pelite with a complex mineralogical composition (Qtz, Ms, Pg, Bt, Grt, Ky, Hbl, St, Rt, 111, PI, Ep). This rock is a mylonite. Three metamorphic stages are recognized: the first two correspond to a prograde M, metamorphism under relatively high P/T conditions (peak at 13kb and about 600ºC). The second is related to mylonitization (Mm 1) with T - 575ºC and P < 1 Okb. We suggest that this rock is polymetamorphic, M, metamorphism beirig probably related to the Grenville orogeny and Mmyl to the Famatinian orogeny. | |
dc.description.department | Depto. de Mineralogía y Petrología | |
dc.description.faculty | Fac. de Ciencias Geológicas | |
dc.description.refereed | TRUE | |
dc.description.status | pub | |
dc.eprint.id | https://eprints.ucm.es/id/eprint/11462 | |
dc.identifier.issn | 0213-683X | |
dc.identifier.officialurl | http://www.sociedadgeologica.es/publicaciones_geogaceta.html | |
dc.identifier.uri | https://hdl.handle.net/20.500.14352/56926 | |
dc.journal.title | Geogaceta | |
dc.language.iso | eng | |
dc.page.final | 42 | |
dc.page.initial | 39 | |
dc.publisher | Sociedad Geológica de España | |
dc.rights.accessRights | open access | |
dc.subject.cdu | 552(238) | |
dc.subject.keyword | High-pressure metamorphism | |
dc.subject.keyword | Ca-rich pelites | |
dc.subject.keyword | Geocronology | |
dc.subject.keyword | Sierra de Pie de Palo | |
dc.subject.keyword | Sierras Pampeanas Occidentales | |
dc.subject.keyword | Argentina | |
dc.subject.ucm | Petrología | |
dc.title | Datos preliminares sobre el metamorfismo de la Sierra de Pie de Palo, Sierras Pampeanas Occidentales (Argentina) | |
dc.type | journal article | |
dc.volume.number | 24 | |
dspace.entity.type | Publication | |
relation.isAuthorOfPublication | a4fea134-2fb2-4157-9dd1-a3d6002ba005 | |
relation.isAuthorOfPublication | f2fb71b6-b7fd-4fc6-bf39-d4de3ba5a67c | |
relation.isAuthorOfPublication.latestForDiscovery | a4fea134-2fb2-4157-9dd1-a3d6002ba005 |
Download
Original bundle
1 - 1 of 1
Loading...
- Name:
- Baldo_et_al_geogaceta_1998.pdf
- Size:
- 354.65 KB
- Format:
- Adobe Portable Document Format