Results 121 to 130 of about 1,123 (149)
High resolution geochemical mapping in the Mociços mine (Ossa-Morena Zone, Portugal). [PDF]
, 2022 The Mociços mine is a Cu-rich quartz-carbonate vein-type deposit hosted in the Palaeozoic detrital metasediments of the Ossa-Morena Zone (SW Portugal), exploited during the beginning of the XX century. A soil geochemistry campaign was carried out, with a portable X-Ray Fluorescence, in order to estimate metal distribution throughout the Mociços mine ...
Nogueira, Pedro +5 more
openaire
Some of the next articles are maybe not open access.
Related searches:
Related searches:
Early Paleozoic rifting and bimodal volcanism in the Ossa-Morena Zone of south-west Spain
Geologische Rundschau, 1994Lower Paleozoic volcanic members have been investigated by geological, petrographical and geochemical means in a traverse across the Ossa-Morena Zone (OMZ) in south-west Spain.
Uwe Giese, Bernhard B�hn
openaire +1 more source
International Journal of Earth Sciences, 2013
New results on the geochemistry of Neoproterozoic (late Ediacaran) metabasites of the Ossa-Morena Zone (OMZ, Iberian Massif) are presented. The metabasite suite exhibits N- and E-MORB signatures, as well as volcanic arc signatures. The three amphibolite groups are discerned on the basis of major and trace element contents, and the Nd isotope relations ...
M. E. Sánchez Lorda +5 more
openaire +1 more source
New results on the geochemistry of Neoproterozoic (late Ediacaran) metabasites of the Ossa-Morena Zone (OMZ, Iberian Massif) are presented. The metabasite suite exhibits N- and E-MORB signatures, as well as volcanic arc signatures. The three amphibolite groups are discerned on the basis of major and trace element contents, and the Nd isotope relations ...
M. E. Sánchez Lorda +5 more
openaire +1 more source
Fluid constraints in the Miguel Vacas Cu deposit (Ossa-Morena Zone, Portugal)
2019The ancient Miguel Vacas copper mine belongs to a cluster of ancient Cu mines and occurrences in the Ossa-Morena Zone, specifically in the Sousel-Barrancos metallogenic belt (SBMB), such as Mociços, Ferrarias and Bugalho. This deposit is characterised by an anastomosing vein structure mainly composed of quartz + carbonate + sulphides that extends over ...
MAIA, Miguel +4 more
openaire +2 more sources
Tectonophysics, 1999
Abstract The transition between the South Portuguese Zone (SPZ) and the Ossa Morena Zone (OMZ) is made up of a major geosuture, which is indicated by the Beja-Acebuches ophiolite. Several geological data suggest that this suture is the result of an oblique collision, with a northward propagation, between the SPZ and OMZ.
Fernando A. Monteiro Santos +6 more
openaire +1 more source
Abstract The transition between the South Portuguese Zone (SPZ) and the Ossa Morena Zone (OMZ) is made up of a major geosuture, which is indicated by the Beja-Acebuches ophiolite. Several geological data suggest that this suture is the result of an oblique collision, with a northward propagation, between the SPZ and OMZ.
Fernando A. Monteiro Santos +6 more
openaire +1 more source
2022
<p>Unsupervised methods are a good entry point for satellite image classification, requiring little to no input, and outputting an analysis, in the form of a thematic map, that may act as a guide for more user input intensive methods. For this work, we use K-means methods to classify satellite and drone imagery that cover the Ossa-Morena ...
Marcelo Silva +3 more
openaire +1 more source
<p>Unsupervised methods are a good entry point for satellite image classification, requiring little to no input, and outputting an analysis, in the form of a thematic map, that may act as a guide for more user input intensive methods. For this work, we use K-means methods to classify satellite and drone imagery that cover the Ossa-Morena ...
Marcelo Silva +3 more
openaire +1 more source
Cambrian ensialic rift-related magmatism in the Ossa-Morena Zone
2011The Late Ediacaran (c. 560–550 Ma) Série Negra sediments of the Évora–Aracena metamorphic belt, Ossa-Morena Zone, SW Iberian Massif, preserve a record of the erosion of an Avalonian–Cadomian magmatic arc and subsequent related turbiditic sedimentation. Detrital zircon from the Série Negra is characterized by predominantly Ediacaran and Cryogenian ages,
Chichorro, Martim +6 more
openaire +1 more source
Fluid constraints in the Mociços Cu deposit (Ossa-Morena Zone, Portugal)
2020The Mociços copper deposit is located in the Ossa-Morena Zone, at the Sousel-Barrancos metallogenic belt (SBMB) and belongs to a cluster of ancient Cu mines and occurrences, such as Miguel Vacas, Ferrarias and Bugalho. This deposit is characterised by a main sulphide assemblage of chalcopyrite + pyrite in a quartz + carbonate decametric lode, with an ...
MAIA, Miguel +5 more
openaire +1 more source
Tectonophysics, 2001
Abstract We have investigated the stratigraphy, structure and metamorphism of the boundary between the Ossa Morena Zone (OMZ) and the Central Iberian Zone (CIZ), two significant continental portions of the Variscan Iberian Massif. The OMZ/CIZ contact is marked by a strongly deformed and metamorphosed NW–SE trending narrow band, namely, the Central ...
J.F. Simancas +4 more
openaire +1 more source
Abstract We have investigated the stratigraphy, structure and metamorphism of the boundary between the Ossa Morena Zone (OMZ) and the Central Iberian Zone (CIZ), two significant continental portions of the Variscan Iberian Massif. The OMZ/CIZ contact is marked by a strongly deformed and metamorphosed NW–SE trending narrow band, namely, the Central ...
J.F. Simancas +4 more
openaire +1 more source
Relicts of Rheic Ocean in Southwest Iberia (Ossa-Morena Zone - Portugal)
2010The geodynamic evolution of Iberian Peninsula during the Variscan Orogeny is directly related with the Wilson Cycle of Rheic Ocean (Vera, 2004; Dias et al., 2006; Ribeiro et al., 2007). This relationship is underlined by major sutures zones and by several occurrences of high pressure metamorphic rocks (i. e.
Pedro, Jorge +4 more
openaire +1 more source