000097983 001__ 97983
000097983 005__ 20210118122901.0
000097983 037__ $$aTAZ-TFG-2020-3207
000097983 041__ $$aspa
000097983 1001_ $$aAznar Gracia, Álvaro
000097983 24200 $$aGeology and mineralogy of Serrana Segunda ore deposit (Gallinero de Cameros, La Rioja)
000097983 24500 $$aGeología y mineralogía del yacimiento de Serrana Segunda (Gallinero de Cameros, La Rioja)
000097983 260__ $$aZaragoza$$bUniversidad de Zaragoza$$c2020
000097983 506__ $$aby-nc-sa$$bCreative Commons$$c3.0$$uhttp://creativecommons.org/licenses/by-nc-sa/3.0/
000097983 520__ $$aThe main goal in this work is the study of Serrana Segunda ore deposit. In order to achieve this purpose, a petrographic study (with optical and electronic microscope) of rock samples collected in the mine, chemical analysis using dispersive X-ray energy and a bibliographic search of the geological context have been done<br />Serrana Segunda is located in the Cameros Massif, an ancient Mesozoic basin created during an extensive period of rupture. The host rocks, Titonian in age, were deposited during an active early rifting stage and are mainly formed by fluvial and lacustrine sediments. This rifting stage generated a stress forces with normal faults systems and high subsidence rates with a thicker sedimentary infill (more than 6,500 meters).<br /> Later, with the Alpine orogeny, faults were reactivated as thrusts and folded structures. The very low- to low grade metamorphism that suffered the region was caused by thermal subsidence and the creation of two different hydrothermal systems, which resulted in the circulation of high-temperature fluids from lower levels through fault planes, fractures and permeable rocks.<br /> The host rocks are a mix of subarkose and feldspathic wacke with significant amounts of organic matter and high porosity that allows the circulation of fluids. Ore minerals occur as cements and replacements. Sedimentary-diagenetic fine-grained bornite, anilite and chalcocite were overprinted by a late hydrothermal mineralization made up of chalcopyrite and tennantite as the predominant mineralogy, along with minor arsenopyrite, galena and cobaltite-gerdorsffite. As products of a supergenic alteration azurite, malachite, thyrolite, chenevixite and stromeyerite were precipitated. Copper sulfides have crystallized replacing plant fragments or in areas with a high accumulation of organic matter.<br />The mineralization occurs as stratabound to stratiform disseminations and is related with significant accumulations of organic matter along bedding, which served as an in situ reductant that would cause the precipitation of copper from an oxidized sedimentary brine. <br />The key attributes of Serrana Segunda ore deposit allow us classified it as a Redbed-hosted copper model.<br /><br />
000097983 521__ $$aGraduado en Geología
000097983 540__ $$aDerechos regulados por licencia Creative Commons
000097983 700__ $$aFanlo González, María Isabel$$edir.
000097983 7102_ $$aUniversidad de Zaragoza$$bCiencias de la Tierra$$cCristalografía y Mineralogía
000097983 8560_ $$f718909@unizar.es
000097983 8564_ $$s2756563$$uhttps://zaguan.unizar.es/record/97983/files/TAZ-TFG-2020-3207.pdf$$yMemoria (spa)
000097983 909CO $$ooai:zaguan.unizar.es:97983$$pdriver$$ptrabajos-fin-grado
000097983 950__ $$a
000097983 951__ $$adeposita:2021-01-18
000097983 980__ $$aTAZ$$bTFG$$cCIEN
000097983 999__ $$a20200713171825.CREATION_DATE