srndOptions {GCDkit}R Documentation

Editor of Sr-Nd isotopic parameters

Description

Graphical user interface (GUI) allowing selection of the main parameters for the Sr-Nd isotopic data recalculations.

Usage

srndOptions()

Details

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.

GUIeditorSrNd.png

Value

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

Plugin

SrNd.r

Note

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'.

Author(s)

Vojtěch Janoušek, vojtech.janousek@geology.cz

References

Bouvier A, Vervoort JD, Patchett PJ (2008) The Lu-Hf and Sm-Nd isotopic composition of CHUR: constraints from unequilibrated chondrites and implications for the bulk composition of terrestrial planets. Earth Planet Sci Lett 273:48-57 doi: 10.1016/j.epsl.2008.06.010

Faure G (1986) Principles of Isotope Geology. John Wiley & Sons, Chichester, pp 1-589

Goldstein SL, O'Nions RK & Hamilton PJ (1984) A Sm-Nd isotopic study of atmospheric dusts and particulates from major river systems. Earth Planet Sci Lett 70: 221-236 doi: 10.1016/0012-821X(84)90007-4

Jacobsen SB, Wasserburg GJ (1980) Sm–Nd isotopic evolution of chondrites. Earth Planet Sci Lett 50:139-155 doi: 10.1016/0012-821X(80)90125-9

Liew TC & Hofmann AW (1988) Precambrian crustal components, plutonic associations, plate environment of the Hercynian Fold Belt of Central Europe: indications from a Nd and Sr isotopic study. Contrib Mineral Petrol 98: 129-138 doi: 10.1007/BF00402106

Lugmair GW, Marti K (1978) Lunar initial 143Nd/144Nd: differential evolution line of the lunar crust and mantle. Earth Planet Sci Lett 39:349-357 doi: 10.1016/0012-821X(78)90021-3

Rehkämper M, Hofmann AW (1997) Recycled ocean crust and sediment in Indian Ocean MORB. Earth Planet Sci Lett 147:93-106 doi: 10.1016/S0012-821X(97)00009-5

Steiger RH, Jäger E (1977) Subcommission on Geochronology; convention on the use of decay constants in geo- and cosmochronology. Earth Planet Sci Lett 36:359-362 doi: 10.1016/0012-821X(78)90021-3

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

See Also

srnd


[Package GCDkit version 6.3.0 Index]