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

[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.

[发布日期] 2018-06-25

[学科分类] 地质物理学

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