Cam4 free ultimate - Apatite u pb dating
Routine low-damage U-Pb dating of apatite using laser ablation-multicollector-ICPMS.
3) Data Acquisition Machine tuning and data acquisition is performed in the same way as zircon, although sample bracketing is done with a primary apatite standard (usually Madagascar, see below) with monitoring of machine performance done by ablating either a secondary apatite standard, NIST SRM 614 glass, or our in-house SL zircon standard.
This has previously limited accurate apatite U-Pb dating to destructive isotope dilution methods.
To illustrate in situ Sensitive High Resolution Ion Micro Probe (SHRIMP) analysis of apatites, Pb isotopes and Pb/U ratios of five apatite samples with different ages have been measured using SHRIMP II ion microprobe at Hiroshima University.
This study presents apatite LA-ICP-MS U-Pb age and trace elements concentrations data from different granite types from the Tatra Mountains, Poland.
Chemostrat employ a laser ablation system coupled with an ICPMS to analyse and date zircon crystals.
By determining the U-Pb isotopic composition of a zircon crystal, the age of the crystal can be calculated by utilising a ‘concordia diagram’.
Apatites from the Quruqtagh ultramafic intrusion in NW China containing low U (~ 2.3 ppm) and high common Pb (Pb-corrected U–Pb age of 805 ± 21 Ma.
The Cenozoic Durango apatite was dated at 31 ± 2 Ma.
Here we present both analytical and data reduction protocols for SIMS in-situ U–Pb analyses on apatite with low U and high common lead.
With NW-1 apatite as the U–Pb age standard, which was separated from ~ 1160 Ma carbonatite in the Prairie Lake complex in Canada, apatites from the Kovdor carbonatite in the Kola peninsula which contains low U (mostly ~ 2.5 ppm) and high common Pb (20–80%) yielded weighted average Pb-corrected U–Pb ages of 375 ± 13 Ma (KV-8 and KV-18) and 377 ± 11 Ma (KV-A), respectively.
Apatite is a common accessory mineral in various igneous, metamorphic and sedimentary rocks.
It has strong potential to provide important information for geochronology and petrogenesis.
Zircon is a robust mineral and so the crystals preserve the age at which they formed or underwent high grade metamorphism.Tags: Adult Dating, affair dating, sex dating