000098171 001__ 98171
000098171 005__ 20210118122906.0
000098171 037__ $$aTAZ-TFG-2020-1711
000098171 041__ $$aspa
000098171 1001_ $$aRodrigo Molina, Irene
000098171 24200 $$aClay minerals as potential files of climatic changes in the coastal successions on Upper Jurassic in Galve (Teruel)
000098171 24500 $$aMinerales de la arcilla como potenciales archivos de cambios climáticos en las sucesiones costeras del Jurásico Superior de Galve (Teruel)
000098171 260__ $$aZaragoza$$bUniversidad de Zaragoza$$c2020
000098171 506__ $$aby-nc-sa$$bCreative Commons$$c3.0$$uhttp://creativecommons.org/licenses/by-nc-sa/3.0/
000098171 520__ $$aThe Upper Jurassic (uppermost Kimmeridgian to lowermost Tithonian) Cedrillas Formation in the Galve subbasin (Teruel) represents deposition in coastal environments and consists on four sequences defined the relative dominance of carbonate, mixed and siliciclastic facies (Val et al., 2018; Val, 2020). This relative dominance of carbonate-siliciclastic deposition has a climatic control (arid to humid periods). This work focuses on the application of clays minerals as paleoclimate proxy in the Cedrillas Formation, in particular, evaluate the proposed climatic control on the unit by means of the clay mineralogy. <br />A detailed mineralogical analysis of 20 selected muddy samples (grey marls, red mudstones) representing coastal plain to marginal lagoon sediments of the Cedrillas Formation, has been carried. The mineralogy was determined both in whole samples and their corresponding less than 2 µm fractions using X-ray diffraction. From these data, the arid/wet index have been calculated (illite+chlorite vs kaolinite+smectite). <br />The principal minerals present are quartz, calcite and clay minerals, also feldspars and dolomite are found in smaller proportions, and siderite and hematites as accessories . <br />Main clay minerals are illite, kaolinite, chlorite, sepiolite, paligorskite and some smectite. The study suggests that most of the clays of the Cedrillas Formation are probably detrital, whereas the fibrous clays (sepiolite and paligorskite) might be both authigenic and detrital. <br />The combination of the mineralogical analysis and the knowledge of the sedimentological and stratigraphy context of the unit makes possible to confirm that the proposed carbonate-siliciclastic cycles where in turn with arid (dominated by illite and chlorite)-humid conditions (dominated by kaolinite and smectite), respectively. Furthermore, clay minerals also indicate that the inprint of the extensive tectonics coeval with sedimentation at the upper part of the unit, did not obliterate the climate signal. In addition, the clay mineralogy suggest that the humid cycles would correspond to warm and humid conditions. <br />Therefore, the clay mineralogy is a good and powerful paleoclimatic proxy in transitional environments if the clays has not been modified by diagenesis. <br /><br />
000098171 521__ $$aGraduado en Geología
000098171 540__ $$aDerechos regulados por licencia Creative Commons
000098171 700__ $$aBauluz Lázaro, Blanca$$edir.
000098171 700__ $$aBádenas Lago, Beatriz$$edir.
000098171 7102_ $$aUniversidad de Zaragoza$$bCiencias de la Tierra$$c
000098171 8560_ $$f739353@unizar.es
000098171 8564_ $$s1903695$$uhttps://zaguan.unizar.es/record/98171/files/TAZ-TFG-2020-1711.pdf$$yMemoria (spa)
000098171 909CO $$ooai:zaguan.unizar.es:98171$$pdriver$$ptrabajos-fin-grado
000098171 950__ $$a
000098171 951__ $$adeposita:2021-01-18
000098171 980__ $$aTAZ$$bTFG$$cCIEN
000098171 999__ $$a20200623100811.CREATION_DATE