Provenance constraints on the Tremp Formation paleogeography (southern Pyrenees): Ebro Massif VS Pyrenees sources

Gómez‐Gras, David; Roigé, Marta; Fondevilla, Víctor; Oms, Oriol; Boya, Salvador; Remacha, E.

doi:10.1016/j.cretres.2015.09.010

Cited by 35 publications

(34 citation statements)

References 29 publications

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“…We hypothesized that the shift in basin axis location controlled the dominant axial fluvial transport location between the Tremp‐Graus and the Ager Basins. While the Ager Basin received sediment sourced from the Eastern Pyrenees, CCR, and southern source regions (Ebro Massif), the Tremp Basin received sediment from the central Pyrenean region, suggesting possible partitioning between the two basins [ Puigdefàbregas et al , ; Gómez‐Gras et al , ]. A shift of the basin axis to the south would connect the Ainsa Basin to the eastern Pyrenean Cadomian zircons via the Ager Basin sediment routing system at Fosado thorugh Gerbe depositional time.…”

Section: Discussionmentioning

confidence: 99%

Detrital zircon (U‐Th)/(He‐Pb) double‐dating constraints on provenance and foreland basin evolution of the Ainsa Basin, south‐central Pyrenees, Spain

Thomson

Stöckli

Clark³

et al. 2017

Tectonics

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South central Pyrenean foreland basin fill preserves the eroded remnants of the early stages of fold‐thrust belt evolution and topographic growth. Specifically, the Eocene Hecho Group in the Ainsa Basin contains a succession of turbiditic channels and levees deposited in the transition zone between the fluvial‐deltaic and deep marine depozones. Detailed isotopic provenance analyses allow for the reconstruction of sediment sources of the ancient sediment routing systems. This study presents 2332 new detrital zircon (DZ) U‐Pb ages and 246 new DZ double‐dated (U‐Th)/(He‐Pb) ages from 19 turbiditic and fluvio‐deltatic sandstones in the Ainsa Basin. These data indicate a progressive provenance shift from Cadomian/Caledonian plutonic and metamorphic rocks of the eastern Pyrenees to Variscan plutonic rocks in the central Pyrenees. Minor sediment contributions from sources located to the S and SE of the basin are seen throughout the section. New DZ (U‐Th)/He results identify four main cooling events: Pyrenean orogenesis (~56 Ma), initial basin inversion (~80 Ma), Cretaceous rifting (~100 Ma), and pre‐Mesozoic cooling ages related to earlier tectonic phases. This study imposes new constraints on the paleogeographic evolution of the Pyrenees and illustrates that high‐frequency fluctuations in sediment delivery processes and sediment routing introduce superimposed noise upon the basin‐scale long‐term provenance evolution during orogenesis.

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Section: Discussionmentioning

confidence: 99%

Detrital zircon (U‐Th)/(He‐Pb) double‐dating constraints on provenance and foreland basin evolution of the Ainsa Basin, south‐central Pyrenees, Spain

Thomson

Stöckli

Clark³

et al. 2017

Tectonics

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“…1B) throughout the whole South-Pyrenean Basin into four units. The palaeogeographic evolution of these units can be found in G omez- Gras et al (2015). The first unit is the Grey Garumnian, which is the equivalent of the Posa Formation (Cuevas, 1992) in the Tremp Basin and the Massana Fm in the Ager basin (Colombo & Cuevas, 1993).…”

Section: Geological Settingmentioning

confidence: 98%

Transitional environments of the lower Maastrichtian South-Pyrenean Basin (Catalonia, Spain): The Fumanya Member tidal flat

Oms

Fondevilla

Riera

et al. 2016

Cretaceous Research

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“…63 Ma, is characterized by shallow to marginal marine sandstones, lacustrine carbonates and fluvial‐deltaic sandstones interbedded with paleosols (Figure ; Colombo & Cuevas, ; Galbrun, Feist, Colombo, Rocchia, & Tambareau, ; Ogg, Ogg, & Gradstein, ). Paleocurrent indicators within the sandstone intervals of the Upper Garumnian Formation show N‐ and NW‐ directed sediment transport (Gómez‐Gras et al, ). Petrographic compositions contain abundant quartz and potassium feldspars, along with plutonic and metamorphic rock fragments, revealing a continued sediment source from the Ebro Massif, similar to the Santonian strata (Gómez‐Gras et al, , ).…”

Section: Geologic Settingmentioning

confidence: 99%

“…The Ager Basin in the south‐central Pyrenean foreland basin contains Late Cretaceous through Eocene strata recording the switches from foreland to the hinterland sediment sourcing and between axial to transverse sediment routing typical of flexural foreland basins (Gómez‐Gras, Collado, Coll, & Roigé, ; Gómez‐Gras et al, ; Puigdefàbregas & Souquet, ). The stratigraphic and structural framework of the basin renders it an ideal setting to employ DZ U‐Pb‐He double dating to resolve the sedimentary provenance evolution, in the light of the predominance of the non‐diagnostic Variscan (ca.…”

Section: Introductionmentioning

confidence: 99%

“…The stratigraphic and structural framework of the basin renders it an ideal setting to employ DZ U‐Pb‐He double dating to resolve the sedimentary provenance evolution, in the light of the predominance of the non‐diagnostic Variscan (ca. 300 Ma) U‐Pb ages delivered into the basin from multiple surrounding foreland and hinterland source regions with fundamentally different thermal histories (Beaumont et al, ; Chanvry et al, ; Gómez‐Gras et al, ; Mey, Nagtegaal, Roberti, & Hartevelt, ; Muñoz, ; Odlum et al, ; Puigdefàbregas & Souquet, ; Thomson et al, ; Vergés, Fernàndez, & Martìnez, ). This study constrains the provenance evolution of the Ager Basin in the context of early Pyrenean fold‐and‐thrust belt evolution through DZ U‐Pb‐He double dating of five stratigraphic intervals spanning the Late Cretaceous to Eocene.…”

Section: Introductionmentioning

confidence: 99%

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Sediment provenance and routing evolution in the Late Cretaceous–Eocene Ager Basin, south‐central Pyrenees, Spain

et al. 2019

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This study constrains the sediment provenance for the Late Cretaceous-Eocene strata of the Ager Basin, Spain, and reconstructs the interplay between foreland basin subsidence and sediment routing within the south-central Pyrenean foreland basin during the early phases of crustal shortening using detrital zircon (DZ) U-Pb-He double dating. Here we present and interpret 837 new DZ U-Pb ages, 113 of which are new DZ (U-Th)/He double-dated zircons. U-Pb-He double dating results allow for a clear differentiation between different foreland and hinterland sources of Variscan zircons (280-350 Ma) by leveraging the contrasting thermal histories of the Ebro Massif and Pyrenean orogen, recorded by the zircon (U-Th)/He (ZHe) ages, despite their indistinguishable U-Pb age signatures. Cretaceous-Paleocene sedimentary rocks, dominated by Variscan DZ U-Pb age components with Permian-Triassic (200-300 Ma) ZHe cooling ages, were sourced from the Ebro Massif south of the Ager Basin. A provenance shift occurred at the base of the Early Eocene Baronia Formation (ca. 53 Ma) to an eastern Pyrenean source (north-east of the Ager Basin) as evidenced by an abrupt change in paleocurrents, a change in DZ U-Pb signatures to age distributions dominated by Cambro-Silurian (420-520 Ma), Cadomian (520-700 Ma), and Proterozoic-Archean (>700 Ma) age components, and the prominent emergence of Cretaceous-Paleogene (<90 Ma) ZHe cooling ages. The Eocene Corçà Formation (ca. 50 Ma), characterized by the arrival of fully reset ZHe ages with very short lag times, signals the accumulation of sediment derived from the rapidly exhuming Pyrenean thrust sheets. While ZHe ages from the Corçà Formation are fully reset, zircon fission track (ZFT) ages preserve older inherited cooling ages, bracketing the exhumation level within the thrust sheets to ca. 6-8 km in the Early Eocene. These DZ ZHe ages yield exhumation rate estimates of ca. 0.03 km/Myr during the Late Cretaceous-Paleocene for the Ebro Massif and ca. 0.2-0.4 km/Myr during the Eocene for the eastern Pyrenees. K E Y W O R D S foreland basins, geochronology, provenance analysis, source to sink, tectonics and sedimentation, thermochronology 486 | EAGE THOMSON eT al.

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Provenance constraints on the Tremp Formation paleogeography (southern Pyrenees): Ebro Massif VS Pyrenees sources

Cited by 35 publications

References 29 publications

Detrital zircon (U‐Th)/(He‐Pb) double‐dating constraints on provenance and foreland basin evolution of the Ainsa Basin, south‐central Pyrenees, Spain

Detrital zircon (U‐Th)/(He‐Pb) double‐dating constraints on provenance and foreland basin evolution of the Ainsa Basin, south‐central Pyrenees, Spain

Transitional environments of the lower Maastrichtian South-Pyrenean Basin (Catalonia, Spain): The Fumanya Member tidal flat

Sediment provenance and routing evolution in the Late Cretaceous–Eocene Ager Basin, south‐central Pyrenees, Spain

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