Rhenium-Osmium Isotope Systematics of Tektites and Impact Glasses

玻璃陨石是熔融和淬火的产物， 超高速撞击地球期间的陆地岩石。 高灵敏度负热成像技术的出现 铼-锇同位素分析中离子化技术 使得这个系统非常适合解决 了解经常升高的亲铁元素含量 玻璃陨石 私家侦探们建议进行铼-锇同位素 澳大利亚和象牙玻璃陨石的NTIMS研究 海岸散落的领域和Auoelloul眼镜。 与 Re-Os同位素体系有独特的机会， 确定在玻陨石中发现的Os是否真的是 地外、地壳或两者的混合。 这是 为了证明亲铁元素 玻陨石中的特征是陨石 目标岩石的污染或原位还原。

Tektites are the product of melting and quenching of terrestrial rocks during hypervelocity impacts on the Earth. The advent of the highly-sensitive negative thermal ionization technique (NTIMS) for Re-Os isotopic analysis makes this system ideally suited to the problem of understanding the often elevated siderophile element content of tektites. The P.I.s propose to carry out Re-Os isotopic studies by NTIMS on tektites from the Australasian and Ivory Coast Strewn fields and on the Auoelloul glasses. With the Re-Os isotopic system there is the unique opportunity to determine if the Os found in tektites is really extraterrestrial, crustal or a mixture of both. This is necessary for showing whether the siderophile element signatures in tektites are a result of meteorite contamination or in-situ reduction of the target rocks.