FISSION-TRACKERS:
I have just posted a new Windows program called BinomFit, for the
analysis and interpretation of fission-track grain-age data. You can find the
program at www.geology.yale.edu/~brandon.
This program is a complete make over of two old DOS programs that
John Garver and I have been using for a while now (BinomFit and ZetaAge).
You can learn more about this program in the next issue of On Track. I
include here
a brief summary of the main features:
1) Estimation of components or peaks in a mixed fission-track grain-age
distribution using the binomial peak-fitting algorithm of Galbraith and
Green (1990). The program supports both automatic and manual modes for
searching and identifying the largest number of significant peaks. The
program can handle up to 1000 grain ages and solve for as many as 10 peaks.
2) Graphical presentation of results using the probability density plot,
the radial plot, and the P(F) plot.
3) Generation of output files that can be used to construct these plots in
other software, such as Excel or SigmaPlot.
4) Option to send all results to a user-selected printer, including plots
and detailed grain-age data. Printed output includes standard statistics,
such as pool and central ages, plus accurate estimates of confidence
intervals for grain ages, including grains with low track counts.
5) Datasets can be edited to understand the influence of anomalous grains
on the peak-fit solution.
6) Multiple datasets can be merged to produce a composite solution. The
program can handle as many as 20 data files at a time. The merged data can
be saved in its own data file for use in the future.
Mark Brandon, Professor, Dept. of Geology and Geophysics
Yale University, P.O. Box 208109, 210 Whitney Avenue, New Haven, CT 06520-8109
e-mail: [log in to unmask]
wk. phone: +203-432-3135, wk. fax: +203-432-3134
Dept. Web site: http://www.geology.yale.edu
Brandon's site: http://www.geology.yale.edu/~brandon
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