Elsevier

Nuclear Tracks

Volume 5, Issues 1–2, June 1981, Pages 129-136
Nuclear Tracks

Size corrections and plateau age in glass shards

https://doi.org/10.1016/0191-278X(81)90035-4Get rights and content

Abstract

The ages of volcanic glass samples, from beds interlayered in sedimentary series or from volcanic centres, have been measured. Their geological and/or paleontological ages, when known, were from Oligocene to Upper Pleistocene (see Table 1). Some apparent ages of the samples, calculated without corrections, strongly disagreeded with stratigraphic information. All samples showed fading phenomena of spontaneous fission tracks, as witnessed by the sizes of the fossil tracks which were smaller than those of the induced tracks under the same etching conditions.

The apparent ages have been corrected both by the track-size and by the plateau methods. The two correction methods agree perfectly (see Table 2). For the samples with an apparent age which are clearly excessively low, the corrected ages agree very well with the ages expected from geological and/or palaeontological information. This confirms the validity of the corrections and the validity of the track-size method, which can sometimes be very useful for samples with a critical fossil-track counting. The plateau method is preferable for its higher precision.

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