000127793 001__ 127793
000127793 005__ 20250425133128.0
000127793 0247_ $$2doi$$a10.3389/feart.2023.1224164
000127793 0248_ $$2sideral$$a134952
000127793 037__ $$aART-2023-134952
000127793 041__ $$aeng
000127793 100__ $$aBrcic, Vlatko
000127793 245__ $$aA time-space window between Eocene karst bauxite genesis and the first molasse deposition in the Dinaric Foreland Basin in the North Dalmatia, Croatia
000127793 260__ $$c2023
000127793 5060_ $$aAccess copy available to the general public$$fUnrestricted
000127793 5203_ $$aKarst bauxite deposits in the North Dalmatian piggyback basin (NDPGB) are a part of the Mediterranean bauxite belt, which is the largest European bauxite deposit zone; however, there is a general lack of information regarding the genesis, age, and precursor of the bauxite deposits in this region. In this study, we combined detrital zircon U–Pb geochronology with compositional, mineralogical, and morphological data from four bauxite locations in the NDPGB to provide a new palaeogeographical and palaeoenvironmental evolution model for the Lutetian–Rupelian timeframe of the NDPGB. The Eocene climatic conditions began with the Palaeocene–Eocene Thermal Maximum event (∼56 Ma), followed by the Early Eocene Climatic Optimum (∼49 Ma) and Middle Eocene Climatic Optimum (∼40 Ma), and were completed as a cooling trend culminating around the Eocene/Oligocene boundary (∼34 Ma), with a shift towards an icehouse climate. These events were coeval with the continuous drift of the African continent towards Eurasia and the subsequent closure of the western part of the former Neo-Tethys Ocean associated with massive volcanic activity. Based on the bauxite deposits of the NDPGB, Early Eocene limestones formed in the last phase of the long-lasting Adriatic Carbonate Platform. The Middle Eocene orogenic activity resulted in an elevation in this area. High average temperatures, accelerated hydrological cycles and precipitation, and intensive continental weathering with increased volcanic carbon input resulted in favourable conditions for the development of karst bauxites at this time. Further Upper Eocene tectonic deformation of the NDPGB area resulted in the development of bauxite traps and enabled redeposition of the initial bauxite material. Subsequently, the bauxite deposits were covered with clastic carbonate molasse derived from the intensive erosion of the young Dinaric orogeny. The implications of this study are as follows. First, it provides new information on the timing of bauxitisation in the area by providing the first radiometric zircon geochronology, which refined and restricted the time window for bauxite formation in this region. Additionally, our results provide a new perspective on the possibility of aeolian precursors in karst bauxite formation and provide new constraints on the first tectonic marks of the initial Dinaric orogeny.
000127793 536__ $$9info:eu-repo/grantAgreement/ES/DGA/E18-20R$$9info:eu-repo/grantAgreement/EC/H2020/809943/EU/GeoTwinn/GeoTwinn$$9This project has received funding from the European Union’s Horizon 2020 research and innovation program under grant agreement No H2020 809943-GeoTwinn$$9info:eu-repo/grantAgreement/ES/MCIU/PID2021-123127OB-I00
000127793 540__ $$9info:eu-repo/semantics/openAccess$$aby$$uhttp://creativecommons.org/licenses/by/3.0/es/
000127793 590__ $$a2.0$$b2023
000127793 592__ $$a0.691$$b2023
000127793 591__ $$aGEOSCIENCES, MULTIDISCIPLINARY$$b134 / 254 = 0.528$$c2023$$dQ3$$eT2
000127793 593__ $$aEarth and Planetary Sciences (miscellaneous)$$c2023$$dQ1
000127793 594__ $$a3.5$$b2023
000127793 655_4 $$ainfo:eu-repo/semantics/article$$vinfo:eu-repo/semantics/publishedVersion
000127793 700__ $$aDunkl, István
000127793 700__ $$aMindszenty, Andrea
000127793 700__ $$aBrlek, Mihovil
000127793 700__ $$aTrinajstic, Nina
000127793 700__ $$aBajo, Petra
000127793 700__ $$0(orcid)0000-0002-4970-6333$$aBauluz, Blanca$$uUniversidad de Zaragoza
000127793 700__ $$aMišur, Ivan
000127793 700__ $$aKarius, Volker
000127793 700__ $$aŠuica, Sanja
000127793 700__ $$aKukoc, Duje
000127793 700__ $$0(orcid)0000-0002-2169-4561$$aYuste, Alfonso$$uUniversidad de Zaragoza
000127793 700__ $$0(orcid)0000-0002-1954-6180$$aLaita, Elisa$$uUniversidad de Zaragoza
000127793 700__ $$aVon Eynatten, Hilmar
000127793 700__ $$aZeh, Armin
000127793 7102_ $$12000$$2655$$aUniversidad de Zaragoza$$bDpto. Ciencias de la Tierra$$cÁrea Paleontología
000127793 7102_ $$12000$$2120$$aUniversidad de Zaragoza$$bDpto. Ciencias de la Tierra$$cÁrea Cristalografía Mineralog.
000127793 773__ $$g11 (2023), 1224164 [23 pp]$$pFront. earth sci. (Lausanne)$$tFrontiers in Earth Science$$x2296-6463
000127793 8564_ $$s8924686$$uhttps://zaguan.unizar.es/record/127793/files/texto_completo.pdf$$yVersión publicada
000127793 8564_ $$s2303874$$uhttps://zaguan.unizar.es/record/127793/files/texto_completo.jpg?subformat=icon$$xicon$$yVersión publicada
000127793 909CO $$ooai:zaguan.unizar.es:127793$$particulos$$pdriver
000127793 951__ $$a2025-04-25-13:29:46
000127793 980__ $$aARTICLE