Discovery Projects - Grant ID: DP140101116

Funding Activity

Website
http://dataportal.arc.gov.au/NCGP/Web/Grant/Grant/DP140101116

Funding Status
Closed

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Funded Activity Summary

Precise cross-calibration of 40Ar/39Ar, Rb-Sr and U-Pb chronometers: towards an integrated geochronology toolbox. Application of the 40Ar/39Ar isotopic geochronometer to dating rocks, minerals, fossils and meteorites is limited by insufficient precision and consistency in existing determinations of the half-life of its parent isotope 40K. This project proposes novel methods for determination of the half-life and branching ratio of 40K, by age comparison against well calibrated 87Rb-87Sr and 40K-40Ca geochronometers. The ages with all isotopic systems will be determined in the same minerals, thus eliminating the main source of uncertainty in the previous studies. Independently The project will measure the 40K decay rate by decay counting of highly enriched 40K salt and expects a five-fold improvement in precision and accuracy of known 40K decay rate.

Funded Activity Details

Start Date: 01-01-2014

End Date: 01-09-2017

Funding Scheme: Discovery Projects

Funding Amount: $403,334.00

Funder: Australian Research Council

Research Topics

ANZSRC Field of Research (FoR)

Geology | Geochronology | Isotope Geochemistry

ANZSRC Socio-Economic Objective (SEO)

Expanding Knowledge in the Earth Sciences |

Other Keywords

Expanding Knowledge in the Earth Sciences | Geochronology | Geology | Isotope Geochemistry

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