Buscar
Mostrando ítems 31-40 de 6331
THE SOURCE OF THE ESPINHAÇO DIAMONDS: EVIDENCES FROM SHRIMP U-PB ZIRCON AGES OF THE SOPA CONGLOMERATE AND PB-PB ZIRCON EVAPORATION AGES OF METAVOLCANIC ROCKSTHE SOURCE OF THE ESPINHAÇO DIAMONDS: EVIDENCES FROM SHRIMP U-PB ZIRCON AGES OF THE SOPA CONGLOMERATE AND PB-PB ZIRCON EVAPORATION AGES OF METAVOLCANIC ROCKS
(Sociedade Brasileira de Geologia, 2017)
U–Pb ages of detrital zircon grains for the Canastra Group and Passos Nappe units and U–Pb and Lu–Hf isotope analyses from orthogneisses: Provenance and tectonic implications, southern Brasília Belt, Brazil
(2020-08-15)
The age and tectonic setting of Mesoproterozoic to Neoproterozoic covers that occur along the southwestern margins of the São Francisco Craton (SFC) are still uncertain. This study reports new 207Pb/206Pb LA-ICPMS ages of ...
The effect of chemical and physical imperfections in zircon grains in influencing the U-Pb age analyses: Insights from zircon fission track etching
(2019-12-15)
Understanding the chemical etching effects in the crystalline structure of zircon grains is crucial to know their chemical composition, morphology and isotopic geochemistry. After chemical etching, the zircon grain can be ...
Chemical-abrasion u-pb zircon geochronology reveals 150 myr of partial melting events in the archean crust of the são francisco craton
(Universidade Federal de Minas GeraisBrasilIGC - DEPARTAMENTO DE GEOLOGIAUFMG, 2021)
Estudo geocronológico e de geoquímica isotópica da área Pojuca (Província Mineral de Carajás - PA)
(Universidade Federal do ParáBrasilInstituto de GeociênciasUFPAPrograma de Pós-Graduação em Geologia e Geoquímica, 2023)
LA-ICP-MS zircon U-Pb geochronology to constrain the age of post-Neocomian continental deposits of the Cerrillos Formation, Atacama Region , northern Chile: tectonic and metallogenic implications
(Servicio Nacional de Geología y Minería (SERNAGEOMIN), 2009)
U-Pb (Zircon) ages of metavolcanic rocks from the Itaiacoca Group: tectonic implicationsU-Pb (Zircon) ages of metavolcanic rocks from the Itaiacoca Group: tectonic implications
(Universidade de São Paulo, Instituto de Geociências, 2003)