Weathering events recorded in uppermost Hauterivian–lower Barremian clay-dominated continental successions from the NW Iberian Range: climatic vs. tectonic controls
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Published:2021-12-01
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Volume:
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ISSN:1698-6180
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Container-title:Journal of Iberian Geology
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language:en
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Short-container-title:J Iber Geol
Author:
Laita ElisaORCID, Bauluz Blanca, Aurell Marcos, Bádenas Beatriz, Yuste Alfonso
Abstract
AbstractThe facies and clay mineral study of clay/marl-rich levels from the Torrelapaja Formation (latest Hauterivian–early Barremian, NW Iberian Range, NE Spain) allowed to establish the palaeoclimatic and palaeoenvironmental conditions under they were generated. The muddy levels and pisoids contained therein of two logs were sampled and studied by X-ray diffraction and optical and electron microscopy. A similar mineralogical upwards trend is recorded in both logs, with a decrease in calcite coupled with an increase in quartz and orthoclase content and constant proportions in goethite, hematite, diaspore, anatase, rutile, ilmenite, and clay mineral content. The lower muddy levels have higher kaolinite content than the upper levels, where illitic phases are the dominant clay minerals. Smectite and intergrowths of illitic phases and kaolinite are also detected upwards. The kaolinite and smectite textures indicate an authigenic origin, whereas the illitic phases are former phases acting as a substrate for kaolinite crystallization. Pisoids mineralogy and texture show an in-situ origin, but some are fractured, indicating reworking processes. The mineral association found in the muddy levels is characteristic of oxisols formed under warm and humid conditions. The upward decrease in kaolinite content is coeval with an increase in the illitic phases and quartz content, related to siliciclastic input, but is also coeval with the presence of authigenic smectite. This indicates a decrease in chemical weathering, not fully registered due to the siliciclastic contribution, which was possibly associated with a change to colder, drier conditions during the latest Hauterivian–early Barremian in the studied area.
Funder
European Regional Development Fund Gobierno de Aragón Ministerio de Ciencia, Innovación y Universidades Universidad de Zaragoza
Publisher
Springer Science and Business Media LLC
Subject
Stratigraphy,Geology
Reference76 articles.
1. Allix, P., Burnham, A., Fowler, T., Herron, M., Kleinberg, R., & Symington, B. (2011). Coaxing oil from Shale. Oilfield Review, 22(4), 4–15. 2. Aurell, M., Bádenas, B., Canudo, J. I., Castanera, D., García-Penas, A., Gasca, J. M., Martín-Closas, C., Moliner, L., Moreno-Azanza, M., Rosales, I., Santas, L., Sequero, C., & Val, J. (2019). Kimmeridgian-Berriasian stratigraphy and sedimentary evolution of the central Iberian Rift System (NE Spain). Cretaceous Research, 102, 1–19. https://doi.org/10.1016/j.cretres.2019.05.011 3. Aurell, M., Fregenal-Martínez, M., Bádenas, B., Muñoz-García, M. B., Élez, J., Meléndez, N., & de Santisteban, C. (2019). Middle Jurassic-Early Cretaceous tectono-sedimentary evolution of the southwestern Iberian Basin (central Spain): Major palaeogeographical changes in the geotectonic framework of the Western Tethys. Earth-Science Reviews Science, 199, 102983. https://doi.org/10.1016/j.earscirev.2019.102983 4. Aurell, M., Bádenas, B., Castanera, D., Gasca, J. M., Canudo, J. I., Laita, E., & Liesa, C. L. (2021). Latest Jurassic-Early Cretaceous synrift sedimentation of Torrelapaja Subbasin (Cameros Basin): Implications for Northeast Iberia palaeogeography. Cretaceous Research, 128, 104997. https://doi.org/10.1016/j.cretres.2021.104997 5. Bárdossy, G. (1982). Karst Bauxites. Elsevier.
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