srndOptions {GCDkit} | R Documentation |
Graphical user interface (GUI) allowing selection of the main parameters for the Sr-Nd isotopic data recalculations.
srndOptions()
This GUI editor, written in the Tcl/Tk language, allows choosing the main Sr-Nd isotopic data recalculation options, i.e. the 87Rb decay constant, 147Sm decay constant, 87Rb/86Sr and 87Sr/86Sr ratios of the UR and Depleted Mantle reservoirs, 147Sm/144Nd and 143Nd/144Nd ratios of the CHUR and Depleted Mantle reservoirs, and 147Sm/144Nd ratio of the intermediate crustal reservoir used for calculation of the two-stage Nd model ages.
All the possible recalculation options are stored in a simple text file
'constants_srndIso.xxx
', whereby the currently selected options are marked by an asterisk.
Assigns the following global variables:
lambda |
numeric vector; the 87Rb decay constant, 147Sm decay constants |
UR |
numeric matrix; 87Rb/86Sr and 87Sr/86Sr ratios of the UR |
DM.Sr |
numeric matrix; 87Rb/86Sr and 87Sr/86Sr ratios of the Depleted Mantle (DM) |
CHUR |
numeric matrix; 147Sm/144Nd and 143Nd/144Nd ratios of the CHUR |
DM |
numeric matrix; 147Sm/144Nd and 143Nd/144Nd ratios of the Depleted Mantle (DM) |
CC |
numeric vector; 147Sm/144Nd ratio of the intermediate crustal reservoir used for calculation of the two-stage Hf model ages |
SrNd.r
For time being, this editor allows only choosing, but not adding/editing the parameters.
Such changes have to be made directly in the configuration file 'constants_srndIso.xxx
'.
Vojtěch Janoušek, vojtech.janousek@geology.cz
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Villa IM, Holden NE, Possolo A, Ickert RB, Hibbert DB, Renne PR, Bonardi ML, De Biévre P (2022) IUGS-IUPAC recommendations and status reports on the half-lives of 87Rb, 146Sm, 147Sm, 234U, 235U and 238U, (IUPAC Technical Report). Pure Appl Chem 94:1085-1092 doi: 10.1515/pac-2021-1202