srilanka {NiLeDAM}

An example data set: electron microprobe data.

Description

This dataset is kindly provided by Anne-Magali Seydoux-Guillaume [e-mail] and has been published in Seydoux-Guillaume et al. (2012).

Usage

data(srilanka)

Format

A data frame with 32 observations on the following 6 variables:

• U: U concentration (ppm)

• errU: error on the measurement of U concentration

• Th: Th concentration (ppm)

• ErrTh: error on the measurement of Th concentration

• Pb: Pb concentration (ppm)

• ErrPb: error on the measurement of Pb concentration

Details

The first 8 observations are group control data (more precisely, they correspond to standard reference analyses). When testing if all the observations are issued from a single population, the assumption is thus rejected. Removing the first 8 observations leads to obtain a positive answer when testing if the observations come from the same population. See demo(srilanka).

References

Seydoux-Guillaume A.M., Montel J.M., Bingen B., Bosse V., de Parseval P., Paquette J.L., Janots E., Wirth R. (2012) Low-temperature alteration of monazite: fluid mediated coupled dissolution-precipitation, irradiation damage and disturbance of the U-Pb and Th-Pb chronometers. Chemical Geology, 330–331, 140–158.

Examples

data(srilanka)

# With control group data
summary(srilanka)

# Without control group data
summary(srilanka[9:32,])