README.md

In Ryo-fkushima/dluskora: Simulator of diffusion-limited REE uptake by eclogite garnets

dluskora

for metamorphic petrologists

dluskola is a viable tool for simulating trace-elements zoning patterns in a prograde garnet porphyroblast in low-T eclogite. This is based on the theory given by Skora et al. (2006). Using this tool, we can discuss the kinetics of REE diffusion and garnet growth in subduction zones.

Features

This package encompasses two functions: dluskora1 and dluskora2. By choosing more appropriate one and setting some parameters, you can easily draw theoretical core-to-rim REE profiles. dluskora1 is suitable for a situation under which a garnet radius can be approximated by a linear function of time, while dluskora2 (beta version) is useful when a radius–time trajectory is not expressed as a straight line. Moreover, these functions are also compatible with the idea of parameter reduction by Fukushima et al. (2021).

Requirement

R 3.6.0

Installation

Please type the following command in your R console.

remotes::install_github("Ryo-fkushima/dluskora")

Usage

dluskora1(fac1=(1.78 *10^(21)), Q=300000, syR=0.60, c_ave=30, D_0=(4 * 10^(13)), R=8.3, T_1=450, T_2=600, K_d=15, Mr=100, Mt=45, fg=1, ft=2, garsize=0.27)

Output is generated with the plot function. If you have REE profiles in natural garnet samples, you can compare them to the calculated curve by using the lines or points functions.

Author

Ryo Fukushima (Tohoku University, Sendai, Japan)

References

Fukushima R, Tsujimori T, Aoki S, Aoki K (2021) Trace-element zoning patterns in porphyroblastic garnets in low-T eclogites: Parameter optimization of the diffusion-limited REE-uptake model. Isl Arc 30:e12394

Skora S, Baumgartner LP, Mahlen NJ, Johnson CM, Pilet S, Hellebrand E (2006) Diffusion-limited REE uptake by eclogite garnets and its consequences for Lu–Hf and Sm–Nd geochronology. Contrib Mineral Petrol 152:703-720

Ryo-fkushima/dluskora documentation built on April 24, 2021, 4:36 a.m.