Published March 1986 | Version v1
Journal article Metadata-only

The Rb/Sr systematic in granitoid rocks: interpretative considerations, limitations and Brazilian examples

Creators

  • 1. Sao Paulo Univ. (Brazil). Inst. de Geociencias

Description

The Rb/Sr systematic in granitoid rocks is presented. Their applications and limitations for interpreting data, which include Rb/Sr isochronic ages and initial ratios of granitoid rocks are analysed. The Rb/Sr isochronic allow to analyse the petrogenetic process. The 87Sr/86Sr isochronic initial ratios reflect the Sr evolution stage in source materials, indicating the potential contribution of oceanic mantle or crustal and continental coast segments. The data obtained from Brazilian granitoid massifs are discussed. (M.C.K.)

Abstract (Portuguese)

Apresenta-se a sistematica Rb/Sr em rochas granitoides. Analisam-se suas aplicacoes e limitacoes na interpretacao de dados que incluam idades isocronicas Rb/Sr e dados de razoes iniciais em rochas granitoides. As idades isocronicas Rb/Sr permitem analisar o processo petrogenetico. As razoes iniciais isocronicas 87Sr/86Sr refletem o grau de evolucao do Sr nos materiais fontes indicando a contribuicao potencial do manto ou da crosta oceanicos e os segmentos da costa continental. Discutem-se os dados obtidos de granitoides de massivos brasileiros. (M.C.K.)

Additional details

Additional titles

Original title (Portuguese)
A sistematica Rb/Sr em rochas granitoides: consideracoes interpretativas, limitacoes e exemplos brasileiros

Publishing Information

Journal Title
Rev. Bras. Geocienc.
Journal Volume
16
Journal Issue
1
Series
Rev. Bras. Geocienc.
Journal Page Range
38-53
ISSN
0375-7536
CODEN
RBGCA

INIS

Country of Publication
Brazil
Country of Input or Organization
Brazil
INIS RN
18075735
Subject category
S37: INORGANIC, ORGANIC, PHYSICAL AND ANALYTICAL CHEMISTRY;
Resource subtype / Literary indicator
Numerical Data
Descriptors DEI
AGE ESTIMATION; BRAZIL; EVALUATED DATA; GRANITES; ISOTOPE RATIO; PETROGENESIS; RUBIDIUM 87; STRONTIUM 86; STRONTIUM 87
Descriptors DEC
BETA DECAY RADIOISOTOPES; BETA-MINUS DECAY RADIOISOTOPES; DATA; DEVELOPING COUNTRIES; ELECTRON CAPTURE RADIOISOTOPES; EVEN-EVEN NUCLEI; EVEN-ODD NUCLEI; HOURS LIVING RADIOISOTOPES; IGNEOUS ROCKS; INFORMATION; INTERMEDIATE MASS NUCLEI; ISOMERIC TRANSITION ISOTOPES; ISOTOPES; LATIN AMERICA; NUCLEI; NUMERICAL DATA; ODD-EVEN NUCLEI; PLUTONIC ROCKS; RADIOISOTOPES; ROCKS; RUBIDIUM ISOTOPES; SOUTH AMERICA; STABLE ISOTOPES; STRONTIUM ISOTOPES; YEARS LIVING RADIOISOTOPES