Annex 2 - Ar/Ar Dating - BRA23-01-355u gls.full

This file contains the raw data collected and calculations used during the 40Ar/39Ar dating of the glass fragments hand-picked from the 355-400 μm fraction (after crushing) of the Geraisite tektite fragment BRA23-01 (selected to avoid any bubble or inclusions). Details about the methodology can be found in the \"40Ar/39Ar Dating\" section of the Supplemental Material of the paper: Crósta, A.P., Silva, G.G., Ferrière, L., Nonnotte, P., Libowitzky, E., Jourdan, F. Geraisite: The first tektite occurrence in Brazil. Geology, 2025 [Manuscript submitted for publication].

本文件收录了针对杰赖西特玻陨石碎片BRA23-01开展40Ar/39Ar测年过程中所采集的原始数据及相关计算结果。该玻陨石碎片经破碎后分选出355~400微米粒级组分，从中手工挑选玻璃碎屑，挑选过程中刻意规避了所有气泡与包裹体。相关方法的详细信息可参见论文"Geraisite: The first tektite occurrence in Brazil"补充材料中的"40Ar/39Ar Dating"章节；该论文作者为Crósta, A.P.、Silva, G.G.、Ferrière, L.、Nonnotte, P.、Libowitzky, E.、Jourdan, F.，发表于《Geology》2025年（投稿待刊稿）。