TWO REFERENCE MATERIALS, TRACHYTES MDO-G AND ISH-G, FOR ARGON DATING (K-AR AND 40AR/39AR) OF PLEISTOCENE AND HOLOCENE ROCKS |
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| Authors: | Pierre-Yves GILLOT Yves CORNETTE Nathalie MAX Bruno FLORIS |
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| Affiliation: | Centre des Faibles Radioactivités, Laboratoire Mixte CNRS-CEA, Avenue de la Terrasse, 91198 Gif sur Yvette, France;Dipartimento di Scienze della Terra, Universitàdi Milano, via Mangiagalli, 34, 20133 Milano, Italy |
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| Abstract: | With the recent extension of K-Ar dating methods within the Upper Pleistocene time, the use of new standards is recommended to allow calibration and inter-laboratory comparisons. For this purpose, two pure microlitic groundmass reference materials were prepared from trachy-basaltic lavas: Trachyte (MDO-G) from Mont Dore, Puy de Sancy, Massif Central is around 250 000 years old; the second Trachyte (ISH-G) from the Isle of Ischia, Gulf of Naples (Italy), is historical: Arso flow erupted on Christmas 1301 - January 1302 AD. |
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