Published June 1997 | Version v1
Journal article Metadata-only

Chronostratigraphic assignment, based in Strontium isotopes (87 Sr/86 Sr) from the Andira Formation (Amazon Basin) and Cruzeiro do Sul Formation (Acre Basin), Brazil

Creators

  • 1. PETROBRAS, Rio de Janeiro, RJ (Brazil). Centro de Pesquisas
  • 2. Rio Grande do Sul Univ., Porto Alegre, RS (Brazil). Inst. de Geociencias
  • 3. Sao Paulo Univ., SP (Brazil). Inst. de Geociencias

Description

This paper presents some Sr isotope data (87 Sr/86 Sr ratios) from the Andira Formation (Amazon Basin) and Cruzeiro do Sul Formation (Acre Basin) in Northern Brazil. For the first one the analyzed materials were anhydrite found in the median portion of the stratigraphic unit. Limestones samples in the basal portion were the rocks studied in the second unit. The results suggest, respectively, the Sakmarian and Asselian/Sakmarian stages for their depositions, both in the Lower Permian

Additional details

Additional titles

Original title (Portuguese)
Indicacao cronoestratigrafica, com base em isotopos de estroncio (

Publishing Information

Journal Title
Anais da Academia Brasileira de Ciencias
Journal Volume
69
Journal Issue
2
Journal Page Range
p. 173-178.
ISSN
0001-3765
CODEN
AABCAD

INIS

Country of Publication
Brazil
Country of Input or Organization
Brazil
INIS RN
29016538
Subject category
S37: INORGANIC, ORGANIC, PHYSICAL AND ANALYTICAL CHEMISTRY;
Descriptors DEI
ANHYDRITE; BRAZIL; DEPOSITION; ISOTOPE DATING; ISOTOPE RATIO; LIMESTONE; SEDIMENTARY BASINS; STRATIGRAPHY; STRONTIUM ISOTOPES
Descriptors DEC
AGE ESTIMATION; CARBONATE ROCKS; DEVELOPING COUNTRIES; GEOLOGIC STRUCTURES; LATIN AMERICA; MINERALS; ROCKS; SEDIMENTARY ROCKS; SOUTH AMERICA; SULFATE MINERALS

Optional Information

Notes
14 refs., 4 figs., 2 tabs.