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doi: 10.7185/geochemlet.2014 The first nuclear detonation, at the Trinity test site, is an analogue for high temperature volatile loss during planet formation processes. We report Cu isotope and abundance data, comparing them with Zn and K isotopes in trinitite glasses sampled with distance from the detonation centre. Copper concentrations drop, and isotopic compositions become ~0.3 ‰ higher with proximity to the detonation. Relative sensitivity to high temperature evaporative isotopicdoi:10.7185/geochemlet.2014 fatcat:mkoc2lewybgh7java373hmugia