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Table


Table 1: Step-by-step data reduction of the Naxos dataset of 11 inclusion-bearing apatites (with an arithmetic mean age of 11.58 $ \pm $ 0.20 Ma). This table should be read from a to c and from left to right: (a) U, Th and He abundances and pooled age (11.28 $ \pm $ 0.14 Ma). [He$ ^*$] is the $ \alpha $-ejection corrected He-abundance ([He$ ^*$] $ \equiv $ [He]/F$ _t$); (b) The U, Th and He concentrations, required for the calculation of a (U-Th)/He isochron. The isochron-age is 12.0 $ \pm $ 4.2 Ma. (c) logratio transformed data (V,W) and the (dimensionless) geometric mean composition, resulting in the central age of 11.38 $ \pm $ 0.20Ma.
sample name MF1 MF2 MF4 MF5 MF6 MF7 MF8 MF9 MF10 MF11 MF12 pooled normalized geom mean
U (fmol) 588.2 874.4 294.3 595.9 645.1 867.2 221.9 225.9 131.1 356.9 107.0 4907.9 0.614343 0.598444
1se 6.9 7.6 3.5 7.7 8.4 8.9 2.6 2.3 2.0 6.8 1.5 19.7 0.001663 0.001535
Th (fmol) 451.3 628.0 156.4 260.3 370.2 374.2 163.5 136.3 130.3 203.5 126.0 3000.0 0.375517 0.391507
1se 7.0 11.1 2.6 4.3 7.0 5.0 2.8 2.0 2.0 4.6 2.4 17.7 0.001667 0.001537
He (fmol) 9.571 9.752 4.270 6.970 6.909 10.636 2.020 2.356 1.995 6.420 1.014 - - -
1se 0.086 0.091 0.069 0.104 0.088 0.108 0.065 0.066 0.065 0.082 0.061 - - -
Ft 0.77 0.74 0.78 0.80 0.73 0.85 0.65 0.79 0.59 0.79 0.63 - - -
He corr (fmol) 12.484 13.229 5.472 8.728 9.462 12.441 3.099 2.993 3.383 8.113 1.604 81.008 0.010140 0.010049
1se 0.113 0.123 0.089 0.130 0.120 0.126 0.099 0.084 0.110 0.104 0.096 0.363 0.000056 0.000084
age (Ma) 14.04 10.11 12.90 10.37 10.09 10.17 9.30 9.06 16.34 15.64 9.18 11.28 11.38
1se 0.21 0.14 0.26 0.21 0.19 0.15 0.32 0.27 0.59 0.36 0.57 0.07 (a) 0.10
U (nmol/g) 66.02 138.51 33.89 52.26 94.01 26.67 84.36 23.33 86.29 34.22 55.25  
1se 0.77 1.20 0.40 0.67 1.22 0.27 0.99 0.24 1.30 0.65 0.78  
Th (nmol/g) 50.65 99.49 18.01 22.82 53.94 11.51 62.16 14.07 85.72 19.51 65.09  
1se 0.79 1.76 0.30 0.38 1.01 0.15 1.06 0.21 1.34 0.44 1.25  
He corr (nmol/g) 1.401 2.096 0.630 0.765 1.379 0.383 1.178 0.309 2.226 0.778 0.828  
1se 0.211 0.315 0.095 0.115 0.208 0.058 0.181 0.047 0.342 0.117 0.134  
P (nmol/g/Ma) 0.09966 0.20706 0.04879 0.07376 0.13650 0.03760 0.12657 0.03408 0.13604 0.04966 0.09014  
1se 0.00122 0.00206 0.00061 0.00098 0.00187 0.00039 0.00158 0.00037 0.00207 0.00096 0.00138 (b)  
mean
V = ln(U/He) 3.852618 4.191134 3.984828 4.223570 4.222197 4.244235 4.271090 4.323750 3.657474 3.784100 4.200060 4.086823
1se 0.014744 0.012684 0.020112 0.019728 0.018197 0.014382 0.034098 0.029882 0.035898 0.022891 0.061588 0.008801
W = ln(Th/He) 3.587669 3.860234 3.352618 3.395110 3.666715 3.403901 3.965709 3.818314 3.650881 3.222292 4.363991 3.662494
1se 0.017989 0.019986 0.023031 0.022244 0.022711 0.016756 0.036317 0.031678 0.036152 0.025976 0.062956 0.009453
cov(V,W) 0.000081 0.000086 0.000262 0.000223 0.000162 0.000103 0.001025 0.000786 0.001061 0.000164 0.003592 0.000062 (c)



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Next: About this document ... Up: Three new ways to Previous: References
Pieter Vermeesch 2008-01-24