Some conventional potassium–argon and 40Ar/39Ar age studies of glauconite
- 1 January 1976
- journal article
- research article
- Published by Cambridge University Press (CUP) in Geological Magazine
- Vol. 113 (4) , 329-340
- https://doi.org/10.1017/s0016756800047609
Abstract
Summary: 40Ar/39Ar age studies of some glauconites from well-known stratigraphical horizons reveal unexpectedly high ages compared with the conventional K–Ar age determinations. These have been interpreted in terms of nuclear and physico-chemical reactions sustained by the glauconites in the reactor. These impose severe limitations on the use of glauconite in the 40Ar/39Ar irradiation technique.Keywords
This publication has 20 references indexed in Scilit:
- Geological time scaleReports on Progress in Physics, 1974
- An explanation for low radiometric ages from glauconiteGeochimica et Cosmochimica Acta, 1973
- GlauconiteEarth-Science Reviews, 1972
- A study of some glauconites from cretaceous and tertiary formations in South-East EnglandClay Minerals, 1968
- LEAST-SQUARES FITTING OF A STRAIGHT LINECanadian Journal of Physics, 1966
- The dependence of K-Ar age on the mineralogy of various particle size ranges in a shaleGeochimica et Cosmochimica Acta, 1963
- On the evaluation of glauconite and illite for dating sedimentary rocks by the potassium-argon methodGeochimica et Cosmochimica Acta, 1961
- GLAUCONITE AS A POSSIBLE MEANS OF MEASURING THE AGE OF SEDIMENTSAnnals of the New York Academy of Sciences, 1961
- Argon diffusion in glauconite, microcline, sanidine, leucite and phlogopiteAmerican Journal of Science, 1960
- A Redetermination of the Relative Abundances of the Isotopes of Carbon, Nitrogen, Oxygen, Argon, and PotassiumPhysical Review B, 1950