Late Ediacaran carbonate production and REE+Y signatures tracing redox conditions in a Cadomian retroarc basin, Central Iberian Zone, Spain
The late Ediacaran carbonate production recorded in a Cadomian retroarc basin from the Iberian Peninsulaprovides an excellent opportunity to evaluate the tectonic and redox factors that controlled the infill of the foredeeptroughs, located between uplifted orogenic wedges and exposed forebulge trans...
| Autores: | , , , |
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| Tipo de recurso: | artículo |
| Fecha de publicación: | 2024 |
| País: | España |
| Institución: | Consejo Superior de Investigaciones Científicas (CSIC) |
| Repositorio: | RUIdeRA. Repositorio Institucional de la UCLM |
| OAI Identifier: | oai:ruidera.uclm.es:10578/47773 |
| Acceso en línea: | https://doi.org/10.1344/GeologicaActa2024.22.5 https://hdl.handle.net/10578/47773 https://revistes.ub.edu/index.php/GEOACTA/article/view/45829 |
| Access Level: | acceso abierto |
| Palabra clave: | Cadomian Retroarc basin Carbonate factory Ediacaran Gondwana Megabreccia |
| Sumario: | The late Ediacaran carbonate production recorded in a Cadomian retroarc basin from the Iberian Peninsulaprovides an excellent opportunity to evaluate the tectonic and redox factors that controlled the infill of the foredeeptroughs, located between uplifted orogenic wedges and exposed forebulge transects. In the Central Iberian Zoneof the Iberian massif, the carbonates of the Villarta Formation follow two geographic belts, which represent short-term mosaics of uplifted and tilted fault-bounded basement highs. These recorded the nucleation of fringingreefal (rich in Cloudina and Sinotubulites microfossils embedded in thromboid textures) and shoal and back-barrier complexes, which episodically fed slope-related megabreccia lobes and channels. REE+Y datasets fromthe impure carbonates reflect contamination by detrital material, hydrothermal interaction and variable redoxconditions, ranging from oxic to dysoxic, the latter emphasized by the deposition of kerogenous black shales indistal parts of the foredeep trough. |
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