Mostrando 10 resultados de: 19
Filtros aplicados
Subtipo de publicación
Article(19)
Publisher
Chemical Geology(3)
Precambrian Research(2)
Bulletin Mineralogie Petrologie(1)
Clay Minerals(1)
Clays and Clay Minerals(1)
Chemical variations in clay minerals of the Archaean Barberton Greenstone Belt (South Africa)
ArticleAbstract: Four rock profiles of shales, carbonates and greywacke-type sediments were sampled from the mafic coPalabras claves:Autores:Alfred Kron̈er, Clauer N., Theofilos ToulkeridisFuentes:googlescopusA mineralogical, chemical and isotopic investigation of shales from the barberton greenstone belt, South Africa, to constrain source materials and post-deposition evolution
ArticleAbstract: Major, trace and rare-earth elements were determined, together with their Rb-Sr, Sm-Nd and Pb-Pb isoPalabras claves:Autores:Alfred Kron̈er, Clauer N., Theofilos Toulkeridis, Todt W.Fuentes:googlescopusCrystallization conditions of fundamental particles from mixed-layer illite-smectite of bentonites based on isotopic data (K-Ar, Rb-Sr and δ<sup>18</sup>O)
ArticleAbstract: Rb-Sr and oxygen isotope studies, in addition to K-Ar isotopic determinations published previously,Palabras claves:Bentonites, East-Slovak Basin, Fundamental particles, Isotopic tracing, Rb-Sr, δ O 18Autores:Clauer N., Liewig N., Pierret M., Theofilos ToulkeridisFuentes:googlescopusGeochemical and Sr-Nd isotope ratios in Cenozoic basalts from Eritrea: Evidence for temporal evolution from low-Ti tholeiitic to high-Ti alkaline basalts in Afro-Arabian continental flood basalt province
ArticleAbstract: Mid-Tertiary continental flood basalts covering large part of Eritrea, Ethiopia and Yemen comprise aPalabras claves:Autores:Asmerom Y., Teklay M., Theofilos ToulkeridisFuentes:googlescopusGeochemistry of Water and Gas Emissions From Cuicocha and Quilotoa Volcanic Lakes, Ecuador
ArticleAbstract: There are hundreds of volcanic lakes around the world that represent an important hazard due to thePalabras claves:Cuicocha and Quilotoa lakes, ECUADOR, Gas emissions, geochemistry of water, volcanic gases, volcanic lakeAutores:Alonso M., Amonte C., Asensio-Ramos M., Cordero M., Hernández P.A., Melián G.V., Padrón E., Pérez N.M., Somoza L., Theofilos ToulkeridisFuentes:googlescopusEffect of thermal maturation on the K-Ar, Rb-Sr and REE systematics of an organic-rich New Albany Shale as determined by hydrous pyrolysis
ArticleAbstract: Hydrous-pyrolysis experiments were conducted on an organic-rich Devonian-Mississippian shale, whichPalabras claves:Hydrous pyrolysis, K-Ar, Mineral-organic interactions, New Albany shale, Rb-Sr, REEAutores:Chaudhuri S., Clauer N., Lewan M.D., Theofilos ToulkeridisFuentes:googlescopusDifferentiated hydrothermal and meteoric alterations of the Lueshe carbonatite complex (Democratic Republic of Congo) identified by a REE study combined with a sequential acid-leaching experiment
ArticleAbstract: The behavior of rare-earth elements (REE) during hydrothermal alteration and progressive weatheringPalabras claves:Carbonatite, Hydrothermal alteration, Meteoric weathering, Rare-earth elements, Republic of CongoAutores:Bilal E., Clauer N., Nasraoui M., Theofilos ToulkeridisFuentes:googlescopusOrganic geochemistry and mineralogy suggest anthropogenic impact in speleothem chemistry from volcanic show caves of the Galapagos
ArticleAbstract: The network of lava tubes is one of the most unexploited natural wonders of the Galapagos Islands. HPalabras claves:Earth sciences, geochemistry, Geology, volcanoAutores:Calaforra J.M., Caldeira A.T., Coutinho M.L., Forti P., Gázquez F., Jiménez-Morillo N.T., Miller A.Z., Palma V., Pereira M.F.C., Rull F., Sauro F., Theofilos ToulkeridisFuentes:googlescopusMineralogical, geochemical (REE), and isotopic (K-AR, RB-SR, δ<sup>18</sup>O) evolution of the clay minerals from faulted, carbonate-rich, passive paleomargin of southeastern Massif Central, France
ArticleAbstract: Mineralogical, geochemical (REE), and isotopic (K-Ar, Rb-Sr, δ18O) data of < 0.2 μm clay fractions fPalabras claves:Autores:Clauer N., Gauthier-Lafaye F., Sizun J.P., Theofilos Toulkeridis, Weber F.Fuentes:googlescopusPb-Pb age, stable isotope and chemical composition of Archaean magnesite, Barberton Greenstone Belt, South Africa
ArticleAbstract: Trace-element, carbon, oxygen and lead-isotope analyses were carried out to determine the formationPalabras claves:Autores:Alfred Kron̈er, Clauer N., Peucker-Ehrenbrink B., Schidlowski M., Theofilos Toulkeridis, Todt W.Fuentes:googlescopus