Published May 1977 | Version v1
Journal article Metadata-only

Age and Isotopic Studies of Some Pan-African Granite from North-Central Nigeria

Creators

  • 1. Scottish Universities Research and Reactor Centre, Glasgow (UK)
  • 2. Saint Andrews Univ. (UK)

Description

Twenty-nine Rb-Sr whole-rock isotopic analyses and three U-Pb zircon analyses on foliated granites and largely unfoliated charnockitic rocks indicate that the central part of the Pan-African belt in west Africa was characterised by intense orogenic plutonism. These data and Rb-Sr analyses on muscovite books from late cross-cutting pegmatites indicate that the peak of magmatic activity occurred 610 +- 10 m.y.ago. Initial 87Sr/86Sr ratios for the granitic and charnockitic rocks are in the range 0.7065-0.7125, and indicate a significantly older crustal component in the magmas

Additional details

Identifiers

DOI
10.1016/0301-9268(77)90001-8;

Publishing Information

Journal Title
Precambrian Research
Journal Volume
4
Journal Issue
4
Series
Precambrian Res.
Journal Page Range
307-319
ISSN
0301-9268

INIS

Country of Publication
Netherlands
Country of Input or Organization
Netherlands
INIS RN
8318199
Subject category
S58: GEOSCIENCES;
Descriptors DEI
DAUGHTER PRODUCTS; GRANITES; HALF-LIFE; ISOTOPE DATING; ISOTOPE RATIO; LEAD 204; LEAD 206; LEAD 207; LEAD 208; NIGERIA; PEGMATITES; RUBIDIUM 87; STRONTIUM 86; STRONTIUM 87; URANIUM 235; URANIUM 238; ZIRCON
Descriptors DEC
ACTINIDE NUCLEI; AFRICA; AGE ESTIMATION; ALPHA DECAY RADIOISOTOPES; BETA DECAY RADIOISOTOPES; BETA-MINUS DECAY RADIOISOTOPES; DEVELOPING COUNTRIES; ELECTRON CAPTURE RADIOISOTOPES; EVEN-EVEN NUCLEI; EVEN-ODD NUCLEI; HEAVY NUCLEI; HOURS LIVING RADIOISOTOPES; IGNEOUS ROCKS; INTERMEDIATE MASS NUCLEI; ISOMERIC TRANSITION ISOTOPES; ISOTOPES; LEAD ISOTOPES; MINUTES LIVING RADIOISOTOPES; NUCLEI; ODD-EVEN NUCLEI; OXYGEN COMPOUNDS; RADIOISOTOPES; ROCKS; RUBIDIUM ISOTOPES; SECONDS LIVING RADIOISOTOPES; SILICATES; SILICON COMPOUNDS; STABLE ISOTOPES; STRONTIUM ISOTOPES; TRANSITION ELEMENT COMPOUNDS; URANIUM ISOTOPES; YEARS LIVING RADIOISOTOPES; ZIRCONIUM COMPOUNDS; ZIRCONIUM SILICATES

Optional Information

Notes
25 refs., 5 figs., 2 tables.; Updated automatically by Metadata and Full-Text Enrichment Agent