In Situ Dating Experiments of Igneous Rocks Using the KArLE Instrument: A Case Study for Approximately 380 Ma Basaltic Rocks

Cho, Yuichiro ; Cohen, Barbara A

关键词: IN SITU MEASUREMENT;    ARGON LASERS;    GEOCHRONOLOGY;    IGNEOUS ROCKS;    BASALT;    CHRONOLOGY;    POTASSIUM;    SPACE MISSIONS;    MARS SURFACE;    LITHOLOGY;    KREEP;    MASS SPECTROSCOPY;   

RP-ID  :  GSFC-E-DAA-TN54188

学科分类：天文学(综合)

美国|英语

来源: NASA Technical Reports Server

【 摘 要 】

We report new K-Ar isochron data for two approximately 380 Ma basaltic rocks, using an updated version of the Potassium-Argon Laser Experiment (KArLE). These basalts have K contents comparable to lunar KREEP basalts or igneous lithologies found by Mars rovers, whereas previous proof-of-concept studies focused primarily on more K-rich rocks. We continue to measure these analogue samples to show the advancing capability of in situ K-Ar geochronology. KArLE is applicable to other bodies including the Moon or asteroids.