Geologica acta

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Geologica acta	Encontrados 5 registros	La búsqueda tardó 0.01 segundos.

30 p, 7.5 MB

Cadomian metabasites of the Eastern Pyrenees revisited / Pujol-Solà, Núria (Universitat de Barcelona. Departament de Mineralogia, Petrologia i Geologia Aplicada) ; Casas Tuset, Josep Maria (Universitat de Barcelona. Departament de Dinàmica de la Terra i de l'Oceà) ; Proenza, Joaquín A. (Universitat de Barcelona. Departament de Mineralogia, Petrologia i Geologia Aplicada) ; Blanco-Quintero, Idael Francisco (Universitat d'Alacant. Departament de Ciències de la Terra i del Medi Ambient) ; Druguet, Elena (Universitat Autònoma de Barcelona. Departament de Geologia) ; Liesa Torre-Marín, Montserrat (Universitat de Barcelona. Departament de Mineralogia, Petrologia i Geologia Aplicada) ; Román-Alpiste, Manuel J. (Consejo Superior de Investigaciones Científicas. Instituto Andaluz de Ciencias de la Tierra) ; Álvaro, Jose Javier (Consejo Superior de Investigaciones Científicas. Instituto de Geociencias)
This study presents a new geochemical, petrological, and geochronological U-Pb dataset from Ediacaran metabasites and associated rocks of the Canigó and Cap de Creus massifs, Eastern Pyrenees. Metabasites are composed of calcic amphibole + plagioclase + chlorite + epidote ± quartz plus titanite + apatite + ilmenite ± biotite ± rutile as accessory phases and show relict igneous textures. [...]
2023
Geologica acta, Vol. 20 Núm. 2 (2022) , p. 1-26, I-IV (The panafrican and cadomian orogenies in North Africa and western Europe)

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29 p, 2.7 MB

Cadomian/Pan-African consolidation of the Iberian Massif assessed by its detrital and inherited zircon populations : is the ~610Ma age peak a persistent Cadomian magmatic inheritance or the key to unravel its Pan-African basement? / Chichorro, Martim (Universidade Nova de Lisboa. Departamento de Ciências da Terra) ; Solá, Ana Rita (Laboratório Nacional de Energia e Geologia) ; Bento dos Santos, Telmo M. (Universidade de Lisboa. Departamento de Geologia) ; Lains Amaral, João (Universidade de Lisboa. Instituto Dom Luiz) ; Crispim, Lourenço (Universidade de Lisboa. Instituto Dom Luiz)
This work assessed the age distribution of Cadomian/Pan-African orogenic events (550-590 and 605-790Ma, respectively) in several zones of Iberian Massif by means of detrital and inherited zircon analysis compilation. [...]
2022
Geologica acta, Vol. 20 Núm. 2 (2022) , p. 1-29 (The panafrican and cadomian orogenies in North Africa and western Europe)

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27 p, 3.4 MB

Detrital zircon similarities and dissimilarities between the Iberian Pyrite Belt, Ossa-Morena Zone and Meguma / Lains Amaral, João (Universidade de Lisboa. Departamento de Geologia) ; Solá, Ana Rita (Laboratório Nacional de Energia e Geologia) ; Bento dos Santos, Telmo M. (Universidade de Lisboa. Instituto Dom Luiz) ; Chichorro, Martim (Universidade Nova de Lisboa. Departamento de Ciências da Terra)
Despite the so-called exotic nature of the South Portuguese Zone relatively to the other major domains of the Iberian Massif of peri-Gondwanan affinity, Devonian detrital rocks of the oldest strata in the Iberian Pyrite Belt have a remarkable resemblance with the Ossa-Morena Zone's Neoproterozoic-Cambrian rocks and the West Meguma's Cambrian-Ordovician rocks, presenting the so-called "West African signature". [...]
2022
Geologica acta, Vol. 20 Núm. 2 (2022) , p. 1-VIII (The panafrican and cadomian orogenies in North Africa and western Europe)

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26 p, 7.1 MB

Shifts in the Ediacaran to Lower Ordovician sedimentary zircon provenances of Northwest Gondwana : the Pyrenean files / Padel, Maxime (Bureau de Rercherche Géologique et Minière) ; Clausen, Sébastien (University of Lille) ; Poujol, Marc (University of Rennes) ; Álvaro, Jose Javier (Consejo Superior de Investigaciones Científicas. Instituto de Geociencias)
Detrital zircon grains from Cambrian-Lower Ordovician sandstones and quartzites sampled in the Pyrenees were dated by LA-ICPMS in order to assess their provenance sources. Resulting age distributions are compared to other available datasets from neighbouring margins, such as Morocco, the Iberian Peninsula, southern France and Sardinia. [...]
2022
Geologica acta, Vol. 20 Núm. 2 (2022) , p. 1-VIII (The panafrican and cadomian orogenies in North Africa and western Europe)

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2 p, 95.7 KB

Foreword : the Ediacaran-early Palaeozoic Cadomian zircon province fringing Northwest Gondwana / Álvaro, Jose Javier (Consejo Superior de Investigaciones Científicas. Instituto de Geociencias) ; Chichorro, Martim (Universidade Nova de Lisboa. Departamento de Ciências da Terra) ; Gutiérrez-Alonso, Gabriel (Universidad de Salamanca. Departamento de Geología)
This special issue grew out of the "The Panafrican and Cadomian orogenies in North Africa and western Europe" meeting, held online in June 2021. It includes a selection of contributions presented at the workshop with the aim of covering a broad range of challenges derived from the application of the Cadomian zircon province concept.
2022
Geologica acta, Vol. 20 Núm. 2 (2022) , p. 1-2 (The panafrican and cadomian orogenies in North Africa and western Europe)

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