SHRIMP II v2 SW v2.13 ACQUISITION DATA PRINTOUT
analyst GSWA, mount G14-21-1,
506-13.1, 2014-08-14, 17:15:16, set 1 of 1
6 scans, 25 nano seconds dead time, RATIO TO SBM ON, SBM zero 23557, autocenter ON, trim mass offset disabled
data reduction Zircon, BR266, spot x=7981, y=1493, z=2935
primary beam = -1.7nA
QT1 Y defl = -1710 bits; QT1 Z defl = 400 bits
runtable 2014-08-14 GSWA 0955
duration: 15min 28sec (928sec)
RUN TABLE
# |
Name |
AMU |
AMU Offset |
Time s |
Delay s |
Coll Focus |
Centering |
Ref |
Cent |
Detector |
CUP Mode setting |
1 |
Zr2O |
195.82038 |
0.00000 |
2.0 |
8.0 |
12 |
YES 3.0 |
REF |
ALW |
COUNTER |
R 1.0E-12 |
2 |
Pb204 |
203.97838 |
0.00000 |
10.0 |
3.0 |
11 |
NO 10.0 |
NONE |
ALW |
COUNTER |
  |
3 |
Bkgrnd |
204.02338 |
0.00000 |
10.0 |
5.0 |
11 |
NO 0.5 |
BAC |
ALW |
COUNTER |
  |
4 |
Pb206 |
205.98359 |
0.00000 |
10.0 |
4.0 |
11 |
YES 6.0 |
REF |
ALW |
COUNTER |
R 1.0E-12 |
5 |
Pb207 |
206.98859 |
0.00000 |
30.0 |
2.0 |
11 |
NO 5.0 |
NONE |
ALW |
COUNTER |
FS+10mV=1Mcps=FIXED As |
6 |
Pb208 |
207.99159 |
0.00000 |
10.0 |
2.0 |
11 |
NO 4.0 |
NONE |
ALW |
COUNTER |
  |
7 |
U238 |
238.06841 |
0.00000 |
5.0 |
3.0 |
10 |
YES 3.0 |
REF |
ALW |
COUNTER |
  |
8 |
ThO248 |
248.04556 |
0.00000 |
5.0 |
3.0 |
9 |
YES 3.0 |
NONE |
ALW |
COUNTER |
  |
9 |
UO254 |
254.05168 |
0.00000 |
2.0 |
3.0 |
9 |
YES 2.0 |
REF |
ALW |
COUNTER |
  |
AMU-B calibration field offset -0.076 G.
DATA
Zr2O |
18838 |
  |
19378 |
  |
19744 |
  |
19719 |
  |
20712 |
  |
20869 |
  |
Pb204 |
1 |
  |
1 |
  |
1 |
  |
1 |
  |
0 |
  |
0 |
  |
Bkgrnd |
0 |
  |
1 |
  |
0 |
  |
0 |
  |
1 |
  |
0 |
  |
Pb206 |
911 |
  |
843 |
  |
883 |
  |
841 |
  |
792 |
  |
867 |
  |
Pb207 |
281 |
  |
255 |
  |
232 |
  |
229 |
  |
206 |
  |
205 |
  |
Pb208 |
300 |
  |
286 |
  |
276 |
  |
268 |
  |
268 |
  |
265 |
  |
U238 |
982 |
  |
899 |
  |
918 |
  |
975 |
  |
943 |
  |
1078 |
  |
ThO248 |
6158 |
R |
6238 |
  |
6255 |
  |
6240 |
  |
6190 |
  |
6282 |
  |
UO254 |
2518 |
  |
2575 |
  |
2592 |
  |
2627 |
  |
2737 |
  |
2792 |
  |
I - insufficient counts to center; C - fail to center; R - failed F test, passed by rejection
F - failed F test, accepts all counts, S - re-measured
LINEAR REGRESSION (reject at 2 x cnt stat)
  |
Zr2O |
Pb204 |
Bkgrnd |
Pb206 |
Pb207 |
Pb208 |
U238 |
ThO248 |
UO254 |
F |
2.5 |
0.1 |
0.2 |
1.8 |
0.3 |
0.1 |
3.5 |
0.3 |
0.3 |
slope |
2.6 |
-0.0 |
-0.0 |
-0.1 |
-0.1 |
-0.0 |
0.1 |
0.1 |
0.4 |
interc |
1.9E+4 |
1.3E+0 |
3.3E-1 |
8.9E+2 |
2.8E+2 |
3.0E+2 |
9.0E+2 |
6.2E+3 |
2.4E+3 |
cps |
1.0E+4 |
6.1E-2 |
3.3E-2 |
8.6E+1 |
7.9E+0 |
2.8E+1 |
1.9E+2 |
1.2E+3 |
1.3E+3 |
rej1 |
  |
  |
  |
  |
  |
  |
  |
  |
  |
rej2 |
  |
  |
  |
  |
  |
  |
  |
  |
  |
RATIOS
  |
204/206 |
207/206 |
208/206 |
196/238 |
206/238 |
248/238 |
254/238 |
error +- |
0.000327 |
0.091962 |
0.325884 |
52.210631 |
0.446958 |
6.495679 |
6.810066 |
ratio |
0.000401 |
0.002988 |
0.010024 |
1.307353 |
0.013767 |
0.163415 |
0.176179 |
CALIBRATION
CALIBRATION
Zr20/U=1.3034 Pb/U=0.2257 UO/U=6.9737 (Pb/U=0.00964(UO/U)^2)
REDUCED DATA
  |
rad cor |
+- |
age Ma |
+- |
  |
uncorrected |
  |
  |
  |
  |
  |
Pb206/U238 |
0.1881 |
0.0113 |
1110.9331 |
61.2 |
  |
Pb207/Pb206 |
0.0920 |
0.0030 |
1466.5929 |
60.5 |
  |
Pb207/U235 |
2.3847 |
0.1715 |
1238.0258 |
50.2 |
  |
Pb208/Th232 |
0.0583 |
0.0045 |
1144.7970 |
85.1 |
  |
204 corrected |
  |
  |
  |
  |
  |
Pb206/U238 |
0.1871 |
0.0113 |
1105.5920 |
61.2 |
  |
Pb207/Pb206 |
0.0874 |
0.0069 |
1369.0405 |
144.6 |
  |
Pb207/U235 |
2.2542 |
0.2372 |
1198.1071 |
71.4 |
  |
Pb208/Pb206 |
0.3159 |
0.0177 |
  |
  |
  |
Pb208/Th232 |
0.0562 |
0.0051 |
1104.9396 |
96.5 |
  |
207 corrected |
  |
  |
  |
  |
  |
Pb206/U238 |
0.1848 |
0.0111 |
1092.9733 |
60.4 |
  |
Pb208/Pb206 |
0.2918 |
0.0128 |
  |
  |
  |
Pb208/Th232 |
0.0513 |
0.0042 |
1010.5913 |
81.5 |
  |
208 corrected |
  |
  |
  |
  |
  |
Pb206/U238 |
0.1871 |
0.0114 |
1105.6447 |
61.4 |
  |
Pb207/Pb206 |
0.0874 |
0.0082 |
1370.0384 |
171.4 |
  |
Pb207/U235 |
2.2555 |
0.2671 |
1198.5084 |
80.1 |
  |
CONCENTRATIONS
CONCENTRATIONS
U:22.2 ppm Th:23.3 ppm Th/U:1.052 ±0.0 Pb204:1.2 ppb sens 17.1


