Ultra-violet laser probe measurement of ^(40)Ar/^(39)Ar age profile in phlogopite  

作　　者：HEHuaiyu WANGFei SANGHaiqing WANGYinglan BovenAriel ZHURixiang 

机构地区：[1]nstituteofGeologyandGeophysics,ChineseAcademyofSciences,Beijing100029,China [2]LaboratoryofGeochronology,VrijeUniversiteitBrussel,Pleinlaan2,1050Brussels,Belgium

出　　处：《Chinese Science Bulletin》2004年第18期1949-1952,共4页

摘　　要：Ultra-Violet Laser Ablation Microprobe (UV-LAMP) extraction technique enables the direct investigation of Ar-Ar age profile in crystals, and yields more information on rates and durations of geological process than conven-tional single time snapshots. Phlogopite flakes from lampro-phyre at Pishan dyke in western Kunlun were dated by using an UV laser (l = 213 nm) microprobe with spot analyses. The results show good agreement with those from the conven-tional 40Ar/39Ar step heating experiments. This indicates that the Ar isotopes are distributed homogenously in the phlogopite and the UVLAMP can be a powerful tool in the study of thermal history.Ultra-Violet Laser Ablation Microprobe (UV-LAMP) extraction technique enables the direct investigation of Ar-Ar age profile in crystals, and yields more information on rates and durations of geological process than conven-tional single time snapshots. Phlogopite flakes from lampro-phyre at Pishan dyke in western Kunlun were dated by using an UV laser (l = 213 nm) microprobe with spot analyses. The results show good agreement with those from the conven-tional 40Ar/39Ar step heating experiments. This indicates that the Ar isotopes are distributed homogenously in the phlogopite and the UVLAMP can be a powerful tool in the study of thermal history.

关 键 词：激光探针 测量 ^40AR/^39AR 金云母 煌斑岩 

分 类 号：P619.273[天文地球—矿床学] P575.1[天文地球—地质学]