Rift-related volcanism predating the birth of the Rheic Ocean (Ossa-Morena zone, SW Iberia)

Sánchez-García, Teresa; Bellido, F.; Pereira, M. Francisco; Chichorro, M.; Quesada, Cecilio; Pin, C.; Silva, J. B.

doi:10.1016/j.gr.2009.10.005

Cited by 108 publications

(33 citation statements)

References 34 publications

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“…These Ediacaran turbidites were deformed and metamorphosed prior to the deposition of lowermost Cambrian volcanic rocks and sandstones Eguíluz et al, 2000;Pereira & Silva, 2002;Quesada, 1990a;Sánchez-García, Bellido, & Quesada, 2003), forming the Lower Detrital Formation and coeval volcanic-sedimentary complexes Pereira et al, 2011;Sánchez-García et al, 2010). In addition, the Série Negra is locally overlain by the São Jerónimo Formation, composed of interbedded andesites, conglomerates, sandstones and shales (Liñán, 1978).…”

Section: Série Negramentioning

confidence: 99%

Potential sources of Ediacaran strata of Iberia: a review

Pereira

2014

Geodinamica Acta

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Section: Série Negramentioning

confidence: 99%

Potential sources of Ediacaran strata of Iberia: a review

Pereira

2014

Geodinamica Acta

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“…An important record of the initial rifting of the Rheic Ocean is preserved in the Ossa-Morena zone of southern Iberia (Fig. 6) where the transition from Cadomian magmatic arc to Rheic Ocean rifting is again attributed to ridge-trench collision (S anchez-Garc ıa et al, 2008(S anchez-Garc ıa et al, , 2010. Within the Ossa-Morena Zone, cessation of Cadomian arc magmatism is closely followed by clastic sedimentation accompanied by an episode of largely felsic volcanism dated at ca.…”

Section: Initial Riftingmentioning

confidence: 99%

A brief history of the Rheic Ocean

Nance

Gutiérrez-Alonso

Keppie

et al. 2012

Geoscience Frontiers

243

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The Rheic Ocean was one of the most important oceans of the Paleozoic Era. It lay between Laurentia and Gondwana from the Early Ordovician and closed to produce the vast OuachitaAlleghanian-Variscan orogen during the assembly of Pangea. Rifting began in the Cambrian as a continuation of Neoproterozoic orogenic activity and the ocean opened in the Early Ordovician with the separation of several Neoproterozoic arc terranes from the continental margin of northern Gondwana along the line of a former suture. The rapid rate of ocean opening suggests it was driven by slab pull in the outboard Iapetus Ocean. The ocean reached its greatest width with the closure of Iapetus and the accretion of the periGondwanan arc terranes to Laurentia in the Silurian. Ocean closure began in the Devonian and continued through the Mississippian as Gondwana sutured to Laurussia to form Pangea. The ocean consequently plays a dominant role in the Appalachian-Ouachita orogeny of North America, in the basement geology of

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“…The Cambrian zircons found in the Lower Ordovician quartzites fits the interval of magmatic activity in the OMZ (absent in the S-CIZ), representing the onset of rifting in North Gondwana (Sánchez-García et al 2010 and references therein). The discovery of Early Ordovician detrital zircons seems to indicate a source related to the widespread magmatic event that occurred in the CIZ (the Urra Formation, Solá et al 2008; and the Ollo de Sapo Formation, Montero et al 2007) and which preceded the passive margin stage of the Rheic Ocean (North Gondwana).…”

mentioning

confidence: 66%

Provenance of Cambrian–Ordovician Siliciclastic Rocks of Southwestern Iberia: Insights into the Evolution of the North Gondwana Margin

et al. 2014

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This study makes a comparison between the populations of detrital zircons 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) to identify the sediment sources during the development of North Gondwana basins (southwestern Iberia). The U-Pb results obtained for the lower Cambrian sandstones of the OMZ show a remarkable similarity to the detrital zircon ages of greywackes from the underlying OMZ Ediacaran basement (the Série Negra succession). However, there is a greater proportion of Cryogenian grains in the Cambrian rocks, whose main sources are: (1) the late Cadomian magmatic arcs (Ediacaran, ca. 635-545 Ma) which also contributed to filling the late Ediacaran

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Rift-related volcanism predating the birth of the Rheic Ocean (Ossa-Morena zone, SW Iberia)

Cited by 108 publications

References 34 publications

Potential sources of Ediacaran strata of Iberia: a review

Potential sources of Ediacaran strata of Iberia: a review

A brief history of the Rheic Ocean

Provenance of Cambrian–Ordovician Siliciclastic Rocks of Southwestern Iberia: Insights into the Evolution of the North Gondwana Margin

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