(1) Smple prepare：
Four unknown samples (≤200 grains for each sample) are mounted together with reference metarils in epoxy resin (2000 CNY). An additional fee of 300 CNY will be charged for each additional sample or sample grains exceeding 200.
(2) SIMS analysis:
U-Th-Pb geochronology 1000 CNY/h
U-Th-Pb +Trace element 1250 CNY/h
Stable isotope 1250 CNY/h
Trace element 1000 CNY/h
