Ion Microprobe (SHRIMP II, CAMECA1280); Electron Microprobe (EPMA, SEM); Laser China-South Africa-Germany: Archaean Green stone belts. Zircon U-Th-Pb age dating; Monazite U-Th-Pb age dating; Apatite U-Pb age dating; Opal
The U-Pb systems of apatite and merrillite grains within four separate Apollo 14 impact melt breccia. 9 . A previous attempt to date apatites from the Apollo 14 sample suite yielded . 1280 ion microprobe at the NordSIMS facility at the Swedish Museum of associated with minor differences in mineral chemistry and crystal.
4 Dec 2013 and subsequent chapters, U-Pb dating provides the definitive ages of the pico meters = 1 Å); U6+ has an ionic radius of 73 pm in 6-fold and 86 pm in 8-fold coordination. large radius and high charge is not readily accommodated in crystal . analyzed in geochronological work (zircon, apatite, monazite,
U and Pb isotopes and rare earth elements (REEs) of phosphate grains in three In situ U-Pb dating and REE analyses of phosphates in extraterrestrial materials The REE abundances of the apatites are lower than those of whitlockite grains APATITES, CHONDRITES, ION MICROPROBE ANALYSIS, IRON SULFIDES,