atacazo {GCDkit}R Documentation

Whole-rock composition of lavas from the Atacazo and Ninahuilca volcanoes, Ecuador

Description

This data set gives the whole-rock major- and trace-element contents, together with Sr and Nd isotopic compositions of lavas from two volcanic complexes in Ecuador: the Atacazo and the Ninahuilca (Hidalgo, 2006; Hidalgo et al., 2008). This dataset is used in a worked example (chapter 25) of Janousek et al.'s book (2016).

Note that this data set contains information on symbols and colours to be used in GCDkit, as well as labels (Volcano) that can be used for grouping or similar purposes. It also includes 87Sr/86Sr and 143Nd/144Nd. Therefore, if the SrNd plugin for GCDkit is installed, these columns will automatically be recognized as Sr and Nd initial isotopic ratios when loading it into GCDkit (via accessVar("atacazo"), allowing variables such as TDM to be calculated and isotope-based diagrams to be plotted. As no Age column is supplied, the user will be prompted for the emplacement age; the volcanoes being Quaternary in age (220-71 ka for Atacazo and 71-2 ka for Ninahuilca), the age correction is insignificant and a small value (of 0.1 for instance) is adequate.

Usage

data(atacazo)

Format

A data frame containing 110 observations of 38 variables.

Source

data by Silvana Hidalgo, shidalgo@igepn.edu.ec,

formatted by Jean-François Moyen, jfmoyen@gmail.com

References

Hidalgo S (2006) Les interactions entre magmas calco-alcalins "classiques" et adakitiques: exemple du complexe volcanique Atacazo-Ninahuilca (Equateur). Unpublished PhD thesis, Universite Blaise-Pascal, Clermont-Ferrand, France

Hidalgo S, Monzier M, Almeida E, Chazot G, Eissen JP, van der Plicht J, Hall M (2008) Late Pleistocene and Holocene activity of the Atacazo-Ninahuilca Volcanic Complex (Ecuador). J Volc Geoth Res 176: 16-26 doi: 10.1016/j.jvolgeores.2008.05.017

Janousek V, Moyen JF, Martin H, Erban V, Farrow CM (2016) Geochemical Modelling of Igneous Processes - Principles and Recipes in the R Language. Springer Verlag, Berlin doi: 10.1007/978-3-662-46792-3

Examples

    data(atacazo)
    accessVar("atacazo")
    
    binary("SiO2","Ba")
    ageEps()

[Package GCDkit version 6.1 Index]