Dating Igneous Rocks Using the Potassium-Argon Laser Experiment (KArLE) Instrument: A Case Study for 380 Ma Basaltic Rocks

Cho, Yuichiro ; Cohen, Barbara A

关键词: GEOCHRONOLOGY;    IGNEOUS ROCKS;    POTASSIUM;    ARGON LASERS;    BASALT;    LASER-INDUCED BREAKDOWN SPECTROSCOPY;    CASE HISTORIES;    RADIOACTIVE AGE DETERMINATION;    KREEP;    MARS SURFACE;    PLANETARY COMPOSITION;   

RP-ID  :  GSFC-E-DAA-TN67014

学科分类：地质物理学

美国|英语

来源: NASA Technical Reports Server

【 摘 要 】

We report new K-Ar isochron data for twoapproximately 380 million-years-old basaltic rocks, using an updated version of the Potassium-Argon Laser Experiment (KArLE), which is being developed for future in situ dating of planetary materials. These basalts have K contents comparable with those of lunar KREEP basalts or igneous lithologies found by Mars rovers, whereas previous proof-of-concept studies focused primarily on more K-rich rocks. We aim to measure these analogous samples to show the advancing capability of in situ K-Ar geochronology.