Contents of American Mineralogist Electronic Deposit Item AM-03-032

These data are deposited in connection with "Observations on the relationship between 
crystallographic orientation and biasing in apatite fission-track measurements," American 
Mineralogist, v. 88, p. 817-829, 2003, by Richard A. Ketcham.  The data files in this 
archive contain the apatite fission-track length and Dpar measurements first reported by 
Carlson et al. (1999) and also analyzed by Donelick et al. (1999).  The files are in text 
format, and stored in a nested directory structure.  Two types of files are present: length 
measurements and Dpar/Dper (length of etch figure parallel and perpendicular to 
crystallographic c axis, respectively) measurements.  The data are stored in a ZIP-format
archive, which can be decoded using a variety of programs.

Length measurement files

Directories:
ay, b2, b3, dr, fc, hs, kp, ol, pc, pq, rn, sc, ti, un, wk: Original data.  There is one 
file for each mount measured.  In experiments that were measured both with and 
without Cf-irradiation, the measurements that employed Cf-irradiation are 
included here.
noCf: In experiments that were measured both with and without Cf-irradiation, 
these are the measurements that did not employ Cf-irradiation.
gtalr, ltalr: In experiments showing accelerated length reduction of high-angle 
fission tracks, some calculations were performed on subsets of tracks above and 
below the angle marking the transition between elliptical and accelerated length 
reduction tracks (Donelick et al., 1999).  These are the subsets that were 
selected, with outliers deleted.

File name format:
Most file names have the following format: "L<apatite>1<run number>1.a1g", 
where <apatite> is the apatite type abbreviation and <run number> is the number 
of the annealing run, from Carlson et al. (1999).   Files in the "gtalr" and "ltalr" 
directories have "g" and "l" respectively appended to their file names.  In the 
"noCf" folder, file names have the format "L<apatite>1h<run number>1.a9g".  

File format:
Three columns of space-delimited text.  Column 1 is length in micrometers, 
column 2 is not used, and column 3 is angle to crystallographic c axis in degrees.

Dpar/Dper measurement files

Directory:
Dpardper: One file for each apatite, recording measurements on a single mounts.

File name format:
All files are named according to: "<apatite>.gd2", where <apatite> is the apatite 
type abbreviation.

File format:
All files have 10 lines of header data; the tenth line has the number of 
measurements.  Following the header there are two space-delimited columns; the 
first column is unused (all zeros), and the second column alternates between Dpar 
and Dper measurements, in micrometers..

References:
Carlson, W.D., Donelick, R.A., and Ketcham, R.A. (1999) Variability of apatite 
fission-track annealing kinetics I: Experimental results. American Mineralogist, 84, 
1213ö1223.
Donelick, R.A., Ketcham, R.A., and Carlson, W.D. (1999) Variability of apatite 
fission-track annealing kinetics II: Crystallographic orientation effects. American 
Mineralogist, 84, 1224ö1234.
Ketcham, R.A. (2003)  Observations on the relationship between crystallographic 
orientation and biasing in apatite fission-track measurements.  American 
Mineralogist, 88, 817-829.