- x
either a file name (.csv format) OR a matrix
- ...
optional arguments to the read.csv function
- method
one of 'U-Pb', 'Pb-Pb', 'Th-Pb',
'Ar-Ar', 'K-Ca', 'detritals',
'Rb-Sr', 'Sm-Nd', 'Re-Os', 'Th-U',
'U-Th-He', 'fissiontracks' or 'other'
- format
formatting option, depends on the value of
method.
if method='U-Pb', then format is one of either:
X=07/35, err[X], Y=06/38, err[Y], rho[X,Y]
X=38/06, err[X],Y=07/06, err[Y] (, rho[X,Y])
X=07/35, err[X], Y=06/38, err[Y],
Z=07/06, err[Z] (, rho[X,Y]) (, rho[Y,Z])
X=07/35, err[X], Y=06/38, err[Y], Z=04/38,
rho[X,Y], rho[X,Z], rho[Y,Z]
X=38/06, err[X], Y=07/06, err[Y],
Z=04/06, err[Z] (, rho[X,Y], rho[X,Z], rho[Y,Z])
07/35, err[07/35], 06/38, err[06/38],
04/38, err[04/38], 07/06, err[07/06],
04/07, err[04/07], 04/06, err[04/06]
W=07/35, err[W], X=06/38, err[X],
Y=08/32, err[Y], Z=32/38, err[Z],
(rho[W,X], rho[W,Y], rho[W,Z], rho[X,Y],
rho[X,Z], rho[Y,Z])
W=38/06, err[W], X=07/06, err[X],
Y=08/06, err[Y], (Z=32/38, err[Z],
rho[W,X], rho[W,Y], rho[W,Z], rho[X,Y],
rho[X,Z], rho[Y,Z])
X=38/06, err[X], Y=04/06, err[Y], (rho[X,Y])
X=35/07, err[X], Y=04/07, err[Y], (rho[X,Y])
X=38/06, err[X], Y=08/06, err[Y],
(Z=32/38, err[Z], rho[X,Y], rho[X,Z], rho[Y,Z])
X=35/07, err[X], Y=08/07, err[Y],
(Z=32/38, err[Z], rho[X,Y], rho[X,Z], rho[Y,Z])
where optional columns are marked in round brackets
if method='Pb-Pb', then format is one of either:
6/4, err[6/4], 7/4, err[7/4], rho
4/6, err[4/6], 7/6, err[7/6], rho
6/4, err[6/4], 7/4, err[7/4], 6/7, err[6/7]
if method='Th-Pb', then format is one of either:
32/04, err[32/04], 08/04, err[08/04], rho
32/08, err[32/08], 04/08, err[08/04], rho
32/04, err[32/04], 08/04,
err[08/04], 32/08, err[32/08]
if method='Ar-Ar', then format is one of either:
9/6, err[9/6], 0/6, err[0/6], rho (, 39)
6/0, err[6/0], 9/0, err[9/0] (, rho) (, 39)
9/0, err[9/0], 6/0, err[6/0], 9/6, err[9/6] (, 39)
if method='K-Ca', then format is one of either:
K40/Ca44, err[K40/Ca44], Ca40/Ca44, err[Ca40/Ca44], rho
K40/Ca40, err[K40/Ca40], Ca44/Ca40, err[Ca44/Ca40], rho
K40/Ca44, err[K40/Ca44], Ca40/Ca44,
err[Ca40/Ca44], K40/Ca40, err[K40/Ca40]
if method='Rb-Sr', then format is one of either:
Rb87/Sr86, err[Rb87/Sr86], Sr87/Sr86, err[Sr87/Sr86] (, rho)
Rb87/Sr87, err[Rb87/Sr87], Sr86/Sr87, err[Sr86/Sr87] (, rho)
Rb, err[Rb], Sr, err[Sr], Sr87/Sr86, err[Sr87/Sr86]
where Rb and Sr are in ppm
if method='Sm-Nd', then format is one of either:
Sm147/Nd144, err[Sm147/Nd144], Nd143/Nd144, err[Nd143/Nd144] (, rho)
Sm147/Nd143, err[Sm147/Nd143], Nd144/Nd143, err[Nd144/Nd143] (, rho)
Sm, err[Sm], Nd, err[Nd], Nd143/Nd144, err[Nd143/Nd144]
where Sm and Nd are in ppm
if method='Re-Os', then format is one of either:
Re187/Os188, err[Re187/Os188], Os187/Os188, err[Os187/Os188] (, rho)
Re187/Os187, err[Re187/Os187], Os188/Os187, err[Os188/Os187] (, rho)
Re, err[Re], Os, err[Os], Os187/Os188, err[Os187/Os188]
where Re and Os are in ppm
if method='Lu-Hf', then format is one of either:
Lu176/Hf177, err[Lu176/Hf177], Hf176/Hf177, err[Hf176/Hf177] (, rho)
Lu176/Hf176, err[Lu176/Hf176], Hf177/Hf176, err[Hf177/Hf176] (, rho)
Lu, err[Lu], Hf, err[Hf], Hf176/Hf177, err[Hf176/Hf177]
where Lu and Hf are in ppm
if method='Th-U', then format is one of either:
X=8/2, err[X], Y=4/2, err[Y], Z=0/2, err[Z],
rho[X,Y], rho[X,Z], rho[Y,Z]
X=2/8, err[X], Y=4/8, err[Y], Z=0/8, err[Z],
rho[X,Y], rho[X,Z], rho[Y,Z]
X=8/2, err[X], Y=0/2, err[Y], rho[X,Y]
X=2/8, err[X], Y=0/8, err[Y], rho[X,Y]
where all values are activity ratios
if method='fissiontracks', then format is one of
either:
the External Detector Method (EDM), which requires a
\(\zeta\)-calibration constant and its uncertainty, the induced
track density in a dosimeter glass, and a table with the
spontaneous and induced track densities.
LA-ICP-MS-based fission track data using the
\(\zeta\)-calibration method, which requires a 'session
\(\zeta\)' and its uncertainty and a table with the number of
spontaneous tracks, the area over which these were counted and one
or more U/Ca- or U-concentration measurements and their analytical
uncertainties.
LA-ICP-MS-based fission track data using the 'absolute
dating' method, which only requires a table with the the number of
spontaneous tracks, the area over which these were counted and one
or more U/Ca-ratios or U-concentration measurements (in ppm) and
their analytical uncertainties.
if method='other', then format is one of either:
1:X
2:X, err[X]
3:f, X, err[X]
4:X, err[X], Y, err[Y], rho
5:X/Z, err[X/Z], Y/Z, err[Y/Z], X/Y, err[X/Y]
6:a n x (n+1) matrix obtained by prepending a
vector of alternating X,Y-values to its covariance matrix
- ierr
indicates whether the analytical uncertainties of the
input are provided as:
1: 1\(\sigma\) absolute uncertainties.
2: 2\(\sigma\) absolute uncertainties.
3: 1\(\sigma\) relative uncertainties (\(\%\)).
4: 2\(\sigma\) relative uncertainties (\(\%\)).
- d
an object of class diseq.
- Th02i
2-element vector with the assumed initial
\(^{230}\)Th/\(^{232}\)Th-ratio of the detritus (for
Th-U formats 1 and 2) and its standard error.
- Th02U48
9-element vector with the measured composition of
the detritus, containing X=0/8, sX, Y=2/8,
sY, Z=4/8, sZ, rXY, rXZ,
rYZ.
- U8Th2
\(^{238}\)U/\(^{232}\)Th activity-ratio of the
whole rock. Used to estimate the initial
\(^{230}\)Th/\(^{238}\)U disequilibrium (for Th-U formats 3
and 4).
- sister
the non-radiogenic (`sister') isotope of Ca that is
to be used for K-Ca isochrons.