Open AccessThe strontium isotopic composition of Maastrichtian and Danian chalk
Author(s) -
Niels Oluf Jørgensen,
Ole Larsen
Publication year - 1980
Publication title -
bulletin of the geological society of denmark
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.674
H-Index - 28
eISSN - 2245-7070
pISSN - 0011-6297
DOI - 10.37570/bgsd-1979-28-15
Subject(s) - strontium , geology , cretaceous , carbonate , isotopes of strontium , composition (language) , geochemistry , sediment , paleontology , carbonate rock , mineralogy , sedimentary rock , chemistry , linguistics , philosophy , organic chemistry
The isotopic composition of strontium has been measured in 22 samples of Maastrichtian and Danian chalk from various localities in the Danish region. The chalk is an extremely pure biogenic carbonate sediment. The material examined includes bulk samples as well as individual bryozoan skeletons. The 87 Sr/86 Sr ratios obtained were all within the analythical error of the value 0.7075 supporting this values as the isotopic composition of sea water at Late Cretaceous and Early Tertiary time.