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| Format: | Artículo científico |
| Language: | en |
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Servicio Nacional de Geología y Minería
2015
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| Online Access: | https://www.redalyc.org/articulo.oa?id=173941333003 |
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Table of Contents:
- Stratigraphy and sedimentology of the terminal fan of Candeleros Formation (Neuquén Group), Lower Cretaceous, Neuquén Basin, provinces of Neuquén and Mendoza, Argentina María Lidia Sánchez Estefanía Asurmendi Ciencias de la Tierra Terminal fan Neuquén Basin Candeleros Formation The Candeleros Formation is represented by a succession of deposits that represent terminal fans startingto fill a foreland basin (back-arc) during the Albian. The different sub-environments of the terminal fan suggest lowgradients during the onset of deposition of the Río Limay Subgroup (Neuquén Group). The terminal fan system isrepresented by distributary zone (TF-DZ), distributary zone-base zone (TF-DZBZ) and base zone deposits (TF-BZ).Its most notable feature is the presence of bitumen in “pockets” and scattered in the sandstone channel fill and crevassesplays deposit. In this system the feeder zone of the terminal fan system has not been identified, however, the distributionof architectural elements and paleocurrent data allow us to infer that the catchment area of the backbone would havebeen located to the NNW/NW. Distributary zone deposits are characterized by thick deposits of low sinuosity channel,with a high degree of connectivity and strong vertical aggradation of channel belts. Deposits of distributary zone-basezone are characterized by a higher density of channel deposits/distributary plain, but with belt channel less thick, longerlaterally, greater width/thickness ratio and connectivity in the braided deposits. The distal parts of the terminal fan are wellrepresented and vary only in the channelized deposits and mantle/floodplain ratio, which is abruptly reduced towards theflood basin connection. The importance of Candeleros Formation deposits is that they are remnants of accommodationthat preserved the original architecture and represent exhumed reservoirs. 2015 artículo científico 0718-7092 https://www.redalyc.org/articulo.oa?id=173941333003 en http://www.redalyc.org/revista.oa?id=1739 Andean Geology application/pdf Servicio Nacional de Geología y Minería Andean Geology (Chile) Num.3 Vol.42