Group analysSU method for fSUsion track thermochronology

摘要

A methodology to obtain ages and thermal hSUtories of sets of apatite samples from localities with geologically compatible characterSUtics SU described. A methodology exploring the fact that samples with similar geological characterSUtics should present the same thermal hSUtory SU proposed. ThSU approach can contribute for the obtainment of more conclusive reSUlts by analysing fewer samples than it SU necessary when the samples are individually analysed. In order to determine the ages, we use the absolute neutron dosimetry through thin films of natural uranium along with lambda(f) = 8.46 x 10(-17) a(-1). As an example of application of the proposed methodology, we analyse samples collected in a Brazilian region, Sao FrancSUco Craton, which experienced low tectonic activity.