Impact Shocking of a Zircon-Sanidine Mixture and Investigations of Pb Mobility

Szumila, I ; Miller, M ; Trail, D ; Simon, Justin I ; Cintala, Mark J ; Cardenas, F ; Montes, R ; Horz, F ; Wielicki, M M ; Danielson, Lisa R

关键词: CHAINS;    CHRONOLOGY;    GEOCHRONOLOGY;    ISOTOPES;    MINERALS;    LEAD ISOTOPES;    TIME MEASUREMENT;    MOBILITY;   

RP-ID  :  JSC-E-DAA-TN64968

学科分类：金属与冶金

美国|英语

来源: NASA Technical Reports Server

【 摘 要 】

The purpose of this project is to explore the mobility, mixing, and possible clumping of Pb isotopes during laboratory impact shock experiments. Impact events are a common planetary occurrence and their effect on istotope systematics and subsequent geochronology is not fully understood. By artificially shocking mixtures of zircon and sanidine and investigating the sample products, it may be possible to understand if and how Pb is mobilized during impact shock. Isotopes of Pb are the final daughter products of the decay chains of 238U, 235U and 232Th and therefore understanding how mobile the daughter product is during impact events could have consequences for dating impact events. These investigations will also reveal if Pb isotopes can be mixed between minerals