Imperial College London

Dr Craig Smalley

Faculty of EngineeringDepartment of Earth Science & Engineering

Visiting Professor
 
 
 
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Contact

 

c.smalley

 
 
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Location

 

Royal School of MinesSouth Kensington Campus

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Summary

 

Publications

Citation

BibTex format

@book{Smalley:1989,
author = {Smalley, PC and Qvale, G and Qvale, H},
title = {Some ages from Leg 104 Site 642 obtained by Rb-Sr glauconite dating and Sr isotope stratigraphy},
year = {1989}
}

RIS format (EndNote, RefMan)

TY  - BOOK
AB - We have attempted to date several samples from Site 642 using a combination of Sr isotope stratigraphy and Rb-Sr dating of glauconite. A carbonate shell fragment gives a Sr isotope stratigraphy date of 17.3±1.0 Ma, which agrees well with available biostratigraphic and paleomagnetic data. Glauconites from a nearby sample give a similar date. One carbonate shell fragment and two fish teeth samples give concordant Sr isotope stratigraphy ages of about 37 Ma (latest Eocene). Rb-Sr glauconite analyses from one of the samples, while showing some substrate contamination, also support an Eocene age. As specific reworking of fish teeth and carbonate macrofossils (and also glauconite) from 37 Ma-old sediments into three different samples is most unlikely, we view the 37-Ma date as the depositional age of the core. -from Authors
AU - Smalley,PC
AU - Qvale,G
AU - Qvale,H
PY - 1989///
TI - Some ages from Leg 104 Site 642 obtained by Rb-Sr glauconite dating and Sr isotope stratigraphy
ER -