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Provenance analysis of the Late Ediacaran basins from SW Iberia (Serie Negra Su...
Chichorro, Martin; Solá, Rita; Pereira, Manuel Francisco; Hofmann, M.; Linnemann, U.; Gerdes, A.; Medina, Jorge; Lopes, LuísThis study makes a comparison of the populations of detrital zircon from Late Ediacaran greywackes of the Ossa-Morena Zone (OMZ) and the southern domains of the Central Iberian Zone (S-CIZ). The results obtained reveal that the main difference between the age spectra of both populations of detrital zircon is the Neoproterozoic, in particularly the Cryogenian grains. Our new data suggest that deposition in both ...
Provenance of Cambro-Ordovician siliciclastic rocks of the SW Iberia: insights ...
Solá, Rita; Chichorro, Martim; Pereira, Manuel Francisco; Hofmann, M.; Linnemann, U.; Gerdes, A.; Medina, Jorge; Lopes, LuísThis study makes a comparison between the populations of detrital zircon of the Cambrian sandstones from the Ossa-Morena Zone (OMZ) and the Ordovician quartzites from the southern domains of the Central Iberian Zone (S-CIZ) in order to identify the sources during development of North Gondwana basins (SW Iberia). The U-Pb results obtained for the Lower Cambrian sandstones of the OMZ show a remarkable similarity ...
The provenance of Late Ediacaran and Early Ordovician siliciclastic rocks in the
Pereira, M. Francisco; Linnemann, Ulf; Hofmann, Mandy; Chichorro, Martim; Sola, Rita; Medina, Jorge; Silva, Jose B.U–Pb geochronology of detrital zircon from Late Ediacaran (Beiras Group greywackes) and Early Ordovician (Sarnelhas arkosic quartzites and Armorican quartzites of Penacova) sedimentary rocks of the southwest Central Iberian Zone (SW CIZ) constrain the evolution of northern Gondwana active-passive margin transition. The LA-ICP-MS U–Pb data set (375 detrital zircons with 90–110% concordant ages) is dominated by N...
. U-Pb detrital zircon ages from the Beiras Group: Implications for the Neoprot...
Sola, Rita; Chichorro, Martim; Pereira, M. Francisco; Medina, Jorge; Linnemann, Ulf; Hofmann, Mandy; Silva, J. BrandaoU-Pb detrital zircon ages from the Beiras Group greywackes (SW Central Iberian Zone - CIZ) indicate a maximum depositional age of late Ediacaran (c. 560-578 Ma). Two salient features distinguish the Beiras Group from the Série Negra greywackes (age equivalent from the Ossa-Morena Zone - OMZ): i) The presence of Tonian and Mesoproterozoic (<8%) age clusters in the Beiras Group greywackes, that are almost absent ...
Fragmentation of Neoproterozoic magmatic arcs along the northern Gondwana margi...
Chichorro, Martim; Sola, Rita; Pereira, M. Francisco; Linnemann, Ulf; Hofmann, Mandy; Silva, J. BrandaoSW Iberia includes exposures of late Ediacaran rocks in the Central Iberian Zone-CIZ, and the Ossa-Morena Zone-OMZ. This study presents new LA-ICP-MS U-Pb detrital zircon data from late Ediacaran greywackes of the SW CIZ (Beiras Group, a unit from the Schist-Greywacke Complex). A comparison is made with U-Pb detrital zircon data form late Ediacaran greywackes (Série Negra) and early Cambrian arkosic sandstones ...
New geochemical and geochronological data of early Cambrian of (SW Iberia): Cal...
Sanchez-Garcia, Teresa; Pereira, M. Francisco; Bellido, Felix; Chichorro, Martim; Silva, J. Brandao; Valverde-Vaquero, Pablo; Pin, Christian; Solá, RitaThe Ossa-Morena Zone (SW Iberia) displays a well-preserved record of the history of the northern Gondwana margin in Late Ediacaran-Early Cambrian times. This period of time is marked by the late-stage evolution of the Cadomian magmatic arc and related back-arc basins (c. 590-545 Ma), and the onset of rifting and widespread magmatism (c. 530-500 Ma) that led to the opening of the Rheic Ocean. Here we present new...
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