ArArRedux: Rigorous Data Reduction and Error Propagation of Ar40 / Ar39 Data

Processes noble gas mass spectrometer data to determine the isotopic composition of argon (comprised of Ar36, Ar37, Ar38, Ar39 and Ar40) released from neutron-irradiated potassium-bearing minerals. Then uses these compositions to calculate precise and accurate geochronological ages for multiple samples as well as the covariances between them. Error propagation is done in matrix form, which jointly treats all samples and all isotopes simultaneously at every step of the data reduction process. Includes methods for regression of the time-resolved mass spectrometer signals to t=0 ('time zero') for both single- and multi-collector instruments, blank correction, mass fractionation correction, detector intercalibration, decay corrections, interference corrections, interpolation of the irradiation parameter between neutron fluence monitors, and (weighted mean) age calculation. All operations are performed on the logs of the ratios between the different argon isotopes so as to properly treat them as 'compositional data', sensu Aitchison [1986, The Statistics of Compositional Data, Chapman and Hall].

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AuthorPieter Vermeesch [aut, cre]
Date of publication2015-08-26 23:00:14
MaintainerPieter Vermeesch <>

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average Man page
averagebyday Man page
blankcorr Man page
blankcorr.default Man page
blankcorrected Man page
blankcorr.PHdata Man page
blankcorr.timeresolved Man page
calibration Man page
clcorrection Man page
concat Man page
decaycorrection Man page
fitlogratios Man page
fitlogratios.default Man page
fitlogratios.PHdata Man page
fitlogratios.timeresolved Man page
fractionation Man page
get4039 Man page
getages Man page
getJfactors Man page
getmasses Man page
getmasses.default Man page
getmasses.logratios Man page
getmasses.timeresolved Man page
interference Man page
loaddata Man page
loadirradiations Man page
logratios Man page
massfractionation Man page
Melbourne Man page
newredux Man page
param Man page
PHdata Man page
plotcorr Man page
plot.PHdata Man page
plot.timeresolved Man page
process Man page
read Man page
redux Man page
results Man page
subset.logratios Man page
subset.redux Man page
subset.results Man page
subset.timeresolved Man page
summary.results Man page
timeresolved Man page
weightedmean Man page

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