El registre sedimentari de la part subaquàtica de les Coves del Drac (Manacor, Mallorca)
[ENG] During the past few years, studies concerned with sediments in littoral underwater caves have experienced a huge growth because the development of cave-diving exploration and dating techniques. Coves del Drac (Mallorca, Western Mediterranean), which are one of the most releva...
| Autores: | , , , |
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| Tipo de recurso: | artículo |
| Estado: | Versión publicada |
| Fecha de publicación: | 2018 |
| País: | España |
| Institución: | Universidad de las Islas Baleares |
| Repositorio: | Biblioteca Digital de les Illes Balears |
| OAI Identifier: | papersSocietatEspeleologica:PapersSEB_2018vol001p165 |
| Acceso en línea: | http://ibdigital.uib.es/greenstone/sites/oai-site/collect/papersSocietatEspeleologica/index/assoc/PapersSE/B_2018vo/l001p165.dir/PapersSEB_2018vol001p165.pdf http://ibdigital.uib.es/greenstone/library/collection/papersSocietatEspeleologica/document/PapersSEB_2018vol001p165 |
| Access Level: | acceso abierto |
| Palabra clave: | Speleology Speleology -- Spain -- Balearic Islands -- Periodicals |
| Sumario: | [ENG] During the past few years, studies concerned with sediments in littoral underwater caves have experienced a huge growth because the development of cave-diving exploration and dating techniques. Coves del Drac (Mallorca, Western Mediterranean), which are one of the most relevant karstic system of the island of Mallorca, develop on Upper Miocene carbonate rocks cropping out along the east coast of Mallorca. Recent speleodiving surveys provide new opportunities to deep in the knowledge of the cave and specifi cally this work deals with the sediments accumulated along the underwater galleries and chambers. Th is study shows the physico-chemical analysis of 19 sediment samples taken from diff erent areas along the cave. Four major sedimentary facies have been obtained by means of statistical treatment of physico-chemical data. Th ere are two carbonate facies, ranging in grain size from silt to fi nd sand. Th e fi rst one relates with calcite rafts crystals derived from the chemical precipitation at the air-water interface, and the second one with the accumulation of carbonate grains as a product of cave rock wall granular disintegration. On the other hand, there are other two facies with heterogeneous mineralogy and grain size, but with a distinctive feature such as the presence of oxides and siliceous materials and a decline in clay content. Th ese facies are mainly related to sediment transport processes triggered by water infi ltration inside the cave system. From a spatial point of view all the sedimentary processes and mechanism account all around the cave but with diff erent degrees; therefore, very often it is not easy distinguishing between the diff erent facies. Otherwise the characterized sediments resemble or are very similar to those from other coastal karst caves of eastern Mallorca. |
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