x |
a five or six column matrix OR an object of class
UPb , PbPb , ThPb , ArAr , ThU ,
UThHe , or PD (which includes objects of class
RbSr , SmNd , LuHf and ReOs ),
generated by the read.data(...) function
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format |
one of
1 or 2 : X , s[X] , Y , s[Y] ,
rXY ; where rXY is the error correlation between
X and Y ; or
3 : X/Z , s[X/Z] , Y/Z , s[Y/Z] ,
X/Y , s[X/Y] ; for which the error correlations are
automatically computed from the redundancy of the three ratios.
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option |
one of
1 : Wetherill concordia ratios: X=07/35 ,
sX=s[07/35] , Y=06/38 , sY=s[06/38] , rXY .
2 : Tera-Wasserburg ratios: X=38/06 ,
sX=s[38/06] , Y=07/06 , sY=s[07/06] , rXY .
3 : X=38/06 , sX=s[38/06] , Y=04/06 ,
sY=s[04/06] , rXY (only valid if x$format=4,5
or 6 ).
4 : X=35/07 , sX=s[35/07] , Y=04/07 ,
sY=s[04/07] , rXY (only valid if x$format=4,5
or 6 ).
5 : U-Th-Pb concordia ratios: X=06/38 ,
sX=s[06/38] , Y=08/32 , sY=s[08/32] ,
rXY (only valid if x$format=7,8 ).
6 : X=38/06 , sX=s[38/06] , Y=08/06 ,
sY=s[08/06] , rXY (only valid if x$format=7,8 ).
7 : X=35/07 , sX=s[35/07] , Y=08/07 ,
sY=s[08/07] , rXY (only valid if x$format=7,8 ).
8 : X=32/08 , sX=s[32/08] , Y=06/08 ,
sY=s[06/08] , rXY (only valid if x$format=7,8 ).
9 : X=32/08 , sX=s[32/08] , Y=07/08 ,
sY=s[07/08] , rXY (only valid if x$format=7,8 ).
|
inverse |
toggles between normal and inverse isochron
ratios. data2york returns five columns X ,
s[X] , Y , s[Y] and r[X,Y] .
If inverse=TRUE , then X =
204 Pb/206 Pb and Y =
207 Pb/206 Pb (if x has class
PbPb ), or X = 232 Th/208 Pb and
Y = 204 Pb/208 Pb (if x has class
ThPb ), or X = 39 Ar/40 Ar and
Y = 36 Ar/40 Ar (if x has class
ArAr ), or X = 40 K/40 Ca and
Y = 44 Ca/40 Ca (if x has class
KCa ), or X = 87 Rb/87 Sr and
Y = 86 Sr/87 Sr (if x has class
RbSr ), or X = 147 Sm/143 Nd and
Y = 144 Nd/143 Nd (if x has class
SmNd ), or X = 187 Re/187 Os and
Y = 188 Os/187 Os (if x has class
ReOs ), or X = 176 Lu/176 Hf and
Y = 177 Hf/176 Hf (if x has class
LuHf ).
If inverse=FALSE , then X =
206 Pb/204 Pb and Y =
207 Pb/204 Pb (if x has class
PbPb ), or X = 232 Th/204 Pb and
Y = 208 Pb/204 Pb (if x has class
ThPb ), or X = 39 Ar/36 Ar and
Y = 40 Ar/36 Ar (if x has class
ArAr ), or X = 40 K/44 Ca and
Y = 40 Ca/44 Ca (if x has class
KCa ), or X = 87 Rb/86 Sr and
Y = 87 Sr/86 Sr (if x has class
RbSr ), or X = 147 Sm/144 Nd and
Y = 143 Nd/144 Nd (if x has class
SmNd ), or X = 187 Re/188 Os and
Y = 187 Os/188 Os (if x has class
ReOs ), or X = 176 Lu/177 Hf and
Y = 176 Hf/177 Hf (if x has class
LuHf ).
|
type |
Return ‘Rosholt’ or ‘Osmond’ ratios?
Rosholt (type=1 ) returns X=8/2 , sX=s[8/2] ,
Y=0/2 , sY=s[0/2] , rXY .
Osmond (type=2 ) returns X=2/8 , sX=s[2/8] ,
Y=0/8 , sY=s[0/8] , rXY .
|
generic |
If TRUE , uses the following column headers:
X , sX , Y , sY , rXY .
If FALSE and type=1 , uses U238Th232 ,
errU238Th232 , Th230Th232 , errTh230Th232 , rXY
or if FALSE and type=2 , uses Th232U238 ,
errTh232U238 , Th230U238 , errTh230U238 , rXY .
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