Results 81 to 90 of about 4,810,987 (133)

U-Pb dating of cements in Mesozoic ammonites

open access: yes, 2014
Dating sedimentary carbonates using the U-Pb method can help improve the Phanerozoic timescale. Using a novel combination of laser-ablation, multi-collector, inductively-coupled-plasma, mass-spectrometry (LA–MC–ICP–MS) and thermal ionization multi ...
R. R. Parrish (2842598)   +3 more
core   +1 more source

U-Pb SHRIMP dating of uraniferous opals

open access: yes, 2005
U-Pb and U-series analyses of four U-rich opal samples using sensitive high-resolution ion microprobe (SHRIMP) demonstrate the potential of this technique for the dating of opals with ages ranging from several tens of thousand years to millions of years.
Alexander Nemchin (23302264)   +2 more
core  

GEOCRONOLOGIA U-Pb (SHRIMP) E Sm-Nd DE XISTOS VERDES BASÁLTICOS DO ORÓGENO ARAÇUAÍ: IMPLICAÇÕES PARA A IDADE DO GRUPO MACAÚBAS

open access: yesRevista Brasileira de Geociências, 2005
MARLY BABINSKI   +5 more
openaire   +2 more sources

O Complexo Juiz de Fora na região de Três Rios (RJ): litogeoquímica, geocronologia U-Pb (LA-ICPMS) e geoquímica isotópica de Nd e Sr

open access: yesRevista Brasileira de Geociências, 2009
Jefferson Lima Fernandes André   +2 more
openaire   +2 more sources

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