| dc.creator |
López-Munguira, Aurora |
|
| dc.creator |
Nieto, F. |
|
| dc.date |
2008-07-02T10:18:42Z |
|
| dc.date |
2008-07-02T10:18:42Z |
|
| dc.date |
2004 |
|
| dc.date.accessioned |
2017-01-31T02:18:03Z |
|
| dc.date.available |
2017-01-31T02:18:03Z |
|
| dc.identifier |
Journal of Iberian Geology 30 (2004) 109-118 |
|
| dc.identifier |
0378-102X |
|
| dc.identifier |
http://hdl.handle.net/10261/5508 |
|
| dc.identifier.uri |
http://dspace.mediu.edu.my:8181/xmlui/handle/10261/5508 |
|
| dc.description |
[EN] The diagenetic and metamorphic grade of low temperature processes which affected the pelitic materials of the Central Sector of the Ossa-Morena Zone is determined by electron microscopy and X-ray diffraction criteria. Cadomian metamorphic processes produced at least greenschist facies conditions even in the lowest grade rocks of the Serie Negra. Post-Cadomian rifting affected the early Paleozoic sedimentary basin giving way to an extensional metamorphism characterised by a burial pattern, which represents the earliest response to depth-controlled diagenetic and very low-grade metamorphic reaction progress caused by basin subsidence. No significant metamorphic overprint was produced by Variscan deformation, as shown by the preservation of typically sedimentary minerals and early-to-late diagenetic values of KI in Devonian and Carboniferous sediments. |
|
| dc.description |
[ES] Se han determinado los procesos diagenéticos y metamórficos de baja temperatura que afectan a los materiales pelíticos del sector central de la Zona de Ossa Morena, mediante microscopía electrónica y difracción de rayos-X. En este sector, los procesos metamórficos
cadomienses llegaron a alcanzar las condiciones de facies de esquistos verdes como mínimo, aún en las rocas de menor grado de metamorfismo de la Serie Negra. La fase de rifting post-cadomiense afectó a la cuenca sedimentaria durante el Paleozoico inferior, produciendo un metamorfismo extensional de enterramiento que representa la respuesta inicial al progreso de las reacciones diagenéticas y metamórficas de grado muy bajo, controladas por la profundidad debida a la subsidencia de la cuenca. Sin embargo, la deformación varisca no ha producido un metamorfismo significativo, como lo demuestra la conservación de minerales típicamente
sedimentarios y los valores diagenéticos del índice de Kübler que presentan los materiales devónicos y carboníferos. |
|
| dc.description |
The help of M.M. Abad-Ortega (Centro de Instrumentación
Científica, University of Granada) with the HRTEM and AEM and I. Nieto with the preparation of samples was essential for the present work. Financial support was supplied
by Research Project BTE2000-0582 of the Spanish Ministry of Science and Technology and Research Group RNM-0179 of the Junta de Andalucía. |
|
| dc.description |
Peer reviewed |
|
| dc.format |
1148285 bytes |
|
| dc.format |
application/pdf |
|
| dc.language |
eng |
|
| dc.publisher |
Universidad Complutense de Madrid |
|
| dc.rights |
openAccess |
|
| dc.subject |
Crystal-chemical parameters |
|
| dc.subject |
Low-grade metamorphism |
|
| dc.subject |
Precambrian |
|
| dc.subject |
Cambrian |
|
| dc.subject |
Devonian-Carboniferous sediments |
|
| dc.subject |
SW Spain |
|
| dc.subject |
Parámetros cristalquímicos |
|
| dc.subject |
Metamorfismo de grado bajo |
|
| dc.subject |
Precámbrico |
|
| dc.subject |
Cámbrico |
|
| dc.subject |
Sedimentos devónico-carboníferos |
|
| dc.subject |
SW España |
|
| dc.title |
Low-Grade Metamorphism in the Central Sector of the Ossa-Morena Zone |
|
| dc.title |
Metamorfismo de grado bajo en el Sector Central de la Zona de Ossa Morena |
|
| dc.type |
Artículo |
|