Mostrando 10 resultados de: 11
Filtros aplicados
Publisher
Precambrian Research(2)
Chemical Geology(1)
Contributions to Mineralogy and Petrology(1)
International Journal of Earth Sciences(1)
Journal of African Earth Sciences(1)
A 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:googlescopusCrustal age domains in the Kibaran belt of SW-Uganda: Combined zircon geochronology and Sm-Nd isotopic investigation
ArticleAbstract: Combination of geochemistry, Nd mean crustal residence ages and single zircon ages reveal distinct pPalabras claves:Granites, Kibaran, Suspect terranes, Uganda, zirconAutores:Buchwaldt R., Theofilos Toulkeridis, Todt W., Ucakuwun E.K.Fuentes:googlescopusAge of Palaeozoic granites and metamorphism in the Tuvino-Mongolian Massif of the Central Asian Mobile Belt: Loss of a Precambrian microcontinent
ArticleAbstract: The Tuvino-Mongolian Massif (TMM) was previously interpreted as a Precambrian block within the CentrPalabras claves:Central Asian Mobile Belt, Granitoids, High-grade metamorphism, Siberia, Tuvino-Mongolian Massif, U-Pb zircon geochronologyAutores:Alfred Kron̈er, Bibikova E.V., Kotov A., Kovach V.P., Kozakov I.K., Nutman A., Salnikova E.B., Todt W., Yakovleva S.Fuentes:scopusPetrology, geochronology, and tectonic implications of c. 500 Ma metamorphic and igneous rocks along the northern margin of the Central Asian Orogen (Olkhon terrane, Lake Baikal, Siberia)
ArticleAbstract: A significant portion of the continental crust of northern Eurasia is thought to have formed duringPalabras claves:Autores:Alfred Kron̈er, Donskaya T.V., Fedorovsky V.S., Gladkochub D.P., Mazukabzov A.M., Pisarevsky S.A., Poller U., Todt W., Wingate M.T.D.Fuentes:scopusU-Pb isotopic systematics of zircons from prograde and retrograde transition zones in high-grade orthogneisses, Sri Lanka
ArticleAbstract: We present U-Pb zircon isotopic data from locally restricted prograde (arrested in situ charnockitizPalabras claves:Autores:Alfred Kron̈er, Baur N., Hofmann A.W., Liew T., Todt W., Williams I.Fuentes:scopusU-Pb zircon and Sm-Nd model ages of high-grade Moldanubian metasediments, Bohemian Massif, Czechoslovakia
ArticleAbstract: We report single grain U-Pb ion-microprobe as well as conventional bulk size fraction ages for zircoPalabras claves:Autores:Alfred Kron̈er, Compston W., Fiala J., Liew T., Todt W., Vanek J., Vankova V., Wendt I.Fuentes:scopusSingle zircon dating constraining the maximum age of the Barberton greenstone belt, southern Africa
ArticleAbstract: One of the central issues in early Precambrian crustal evolution is the age and genetic relationshipPalabras claves:Autores:Alfred Kron̈er, Todt W.Fuentes:scopusZircon dating of North Bohemian granulites, Czech Republic: Further evidence for the Lower Carboniferous high-pressure event in the Bohemian Massif
Conference ObjectAbstract: U-Pb zircon and rutile multigrain ages and 207Pb/ 206Pb zircon evaporation ages are reported from hiPalabras claves:Czech Republic, HP granulites, Lower Carboniferous, N Bohemia, Rutile dating, zircon datingAutores:Alfred Kron̈er, Fiala J., Kotková J., Todt W.Fuentes:scopusRelationships between the mantle, lower crust and upper crust within the Agardagh-Tes Chem ophiolite, Central Asia: Evidence from petrologic, trace element, and isotopic data
Conference ObjectAbstract: Ophiolites are generally regarded as fragments of oceanic crust, ideally comprising a mantle sectionPalabras claves:Autores:Alfred Kron̈er, Jochum K., Pfander J., Todt W.Fuentes:scopusSm-Nd, Rb-Sr and Pb-Pb dating of silicic carbonates from the early Archaean Barberton Greenstone Belt, South Africa: Evidence for post-depositional isotopic resetting at low temperature
ArticleAbstract: Two silicic carbonate sequences occurring in the Onverwacht Group (OG) and the overlying Fig Tree GrPalabras claves:Archaean, Barberton greenstone belt, Carbonates, Dating, geochronology, Greenstone belt, Isotopic resetting, South AfricaAutores:Alfred Kron̈er, Clauer N., Goldstein S.L., Schidlowski M., Theofilos Toulkeridis, Todt W.Fuentes:googlescopus