Datación Radiogénica (U-234/U-238 y Th-230/U-234) de sistemas travertínicos del Alto Tajo (Guadalajara)
Data of Th-230/U-234 and U-234/U-238 ratios and geomorphological and sedimentological features of several travertine deposits of High Tajo river valley let us point out the evidence of at least four travertine genesis stage(s) > 350 ky has been interpreted as botton-valley travertine deposits...
| Autores: | , , |
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| Tipo de recurso: | artículo |
| Fecha de publicación: | 1990 |
| País: | España |
| Institución: | Universidad de Huelva (UHU) |
| Repositorio: | Arias Montano. Repositorio Institucional de la Universidad de Huelva |
| Idioma: | español |
| OAI Identifier: | oai:ariasmontano.uhu.es:10272/18147 |
| Acceso en línea: | http://hdl.handle.net/10272/18147 |
| Access Level: | acceso abierto |
| Palabra clave: | Travertine Fluvial carbonates U-Th datation High Tajo River Valley Quaternary |
| Sumario: | Data of Th-230/U-234 and U-234/U-238 ratios and geomorphological and sedimentological features of several travertine deposits of High Tajo river valley let us point out the evidence of at least four travertine genesis stage(s) > 350 ky has been interpreted as botton-valley travertine deposits, located along Dulce river and Ruguilla river valley. The second stage (—226 ky) are also a botton-valley travertine located at +8 —10 m. over Ruguilla river. Along Cifuentes river botton-valley and water-fall travertines has been dated as —90 ky. Subrecent travertine deposits of detrital, dam, water-fall types has been attributed to holocene epoch. Radiogenic data of these subrecent travertines has not been in account because uranium lixiviation and «detrital thorium» incorporation of travertine deposits may give a relative Th-230 enrichment and coherently the calculation of too great an age |
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