The significance of Rb-Sr glauconite ages, Bonneterre Formation, Missouri: Late Devonian-Early Mississippian brine migration in the midcontinent

Journal Article · Tue Sep 01 00:00:00 EDT 1992 · Journal of Geology; (United States)

DOI:https://doi.org/10.1086/629615· OSTI ID:6991530

Stein, H J; Kish, S A ^[1]

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1. Geological Survey, Denver, CO (United States)

In his comment on the paper by Stein and Kish (1991), Seidemann suggests that Rb-Sr glauconite dates from Missouri (and particularly those from the Magmont Mine in the Viburnum Trend) do not provide useful age information due to the 'mixing' of common strontium with radiogenic strontium in glauconites. In this reply the original authors address the points brought up by Seidemann and again provide some quantitative limits on the degree to which the addition of common strontium can affect calculated ages of minerals with high Rb/Sr ratios.

• OSTI ID: 6991530
• Journal Information: Journal of Geology; (United States), Journal Name: Journal of Geology; (United States) Vol. 100:5; ISSN 0022-1376; ISSN JGEOAZ
• Country of Publication: United States
• Language: English

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58 GEOSCIENCES
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AGE ESTIMATION
ALKALI METAL ISOTOPES
ALKALINE EARTH ISOTOPES
BRINES
CARBONIFEROUS PERIOD
CHEMISTRY
DEVELOPED COUNTRIES
DEVONIAN PERIOD
FEDERAL REGION VII
GEOCHEMISTRY
GEOLOGIC AGES
GEOLOGIC FORMATIONS
GEOTHERMOMETERS
GEOTHERMOMETRY
HYDROTHERMAL ALTERATION
ISOTOPE DATING
ISOTOPES
LEAD ORES
MEASURING INSTRUMENTS
MICA
MINERALIZATION
MINERALS
MISSOURI
NORTH AMERICA
ORES
PALEOZOIC ERA
ROCK-FLUID INTERACTIONS
RUBIDIUM ISOTOPES
SILICATE MINERALS
STRONTIUM ISOTOPES
THERMOMETERS
USA
ZINC ORES