SHRIMP II v2 SW v2.13 ACQUISITION DATA PRINTOUT
analyst GSWA, mount G14-21-1,
702-6.1, 2014-08-15, 00:54:25, 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=7985, y=2259, z=2680
primary beam = -1.9nA
QT1 Y defl = -1736 bits; QT1 Z defl = 400 bits
runtable 2014-08-14 GSWA 0955
duration: 15min 27sec (927sec)
RUN TABLE
# |
Name |
AMU |
AMU Offset |
Time s |
Delay s |
Coll Focus |
Centering |
Ref |
Cent |
Detector |
CUP Mode setting |
1 |
Zr2O |
195.82539 |
0.00000 |
2.0 |
8.0 |
12 |
YES 3.0 |
REF |
ALW |
COUNTER |
R 1.0E-12 |
2 |
Pb204 |
203.98339 |
0.00000 |
10.0 |
3.0 |
11 |
NO 10.0 |
NONE |
ALW |
COUNTER |
  |
3 |
Bkgrnd |
204.02839 |
0.00000 |
10.0 |
5.0 |
11 |
NO 0.5 |
BAC |
ALW |
COUNTER |
  |
4 |
Pb206 |
205.98827 |
0.00000 |
10.0 |
4.0 |
11 |
YES 6.0 |
REF |
ALW |
COUNTER |
R 1.0E-12 |
5 |
Pb207 |
206.99327 |
0.00000 |
30.0 |
2.0 |
11 |
NO 5.0 |
NONE |
ALW |
COUNTER |
FS+10mV=1Mcps=FIXED As |
6 |
Pb208 |
207.99627 |
0.00000 |
10.0 |
2.0 |
11 |
NO 4.0 |
NONE |
ALW |
COUNTER |
  |
7 |
U238 |
238.07512 |
0.00000 |
5.0 |
3.0 |
10 |
YES 3.0 |
REF |
ALW |
COUNTER |
  |
8 |
ThO248 |
248.05174 |
0.00000 |
5.0 |
3.0 |
9 |
YES 3.0 |
NONE |
ALW |
COUNTER |
  |
9 |
UO254 |
254.05887 |
0.00000 |
2.0 |
3.0 |
9 |
YES 2.0 |
REF |
ALW |
COUNTER |
  |
AMU-B calibration field offset -0.076 G.
DATA
Zr2O |
19009 |
  |
19708 |
  |
20897 |
  |
21627 |
  |
22382 |
  |
22682 |
  |
Pb204 |
0 |
  |
2 |
  |
2 |
  |
0 |
  |
0 |
  |
0 |
  |
Bkgrnd |
2 |
  |
2 |
  |
0 |
  |
0 |
  |
1 |
  |
0 |
  |
Pb206 |
3708 |
  |
3478 |
  |
3491 |
  |
3418 |
  |
3264 |
  |
3172 |
  |
Pb207 |
847 |
  |
762 |
  |
737 |
  |
777 |
  |
703 |
  |
759 |
  |
Pb208 |
1543 |
  |
1577 |
  |
1624 |
  |
1549 |
  |
1459 |
  |
1486 |
  |
U238 |
3881 |
  |
3947 |
  |
4069 |
  |
4106 |
  |
3996 |
  |
3954 |
  |
ThO248 |
39367 |
  |
39081 |
  |
38825 |
  |
38045 |
  |
37282 |
  |
37257 |
R |
UO254 |
11362 |
  |
11065 |
  |
10795 |
  |
11069 |
  |
10695 |
  |
11005 |
R |
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 |
3.0 |
0.3 |
0.2 |
0.9 |
2.2 |
1.7 |
1.9 |
1.4 |
4.0 |
slope |
5.0 |
-0.0 |
-0.0 |
-0.6 |
-0.1 |
-0.1 |
0.1 |
-3.1 |
-0.5 |
interc |
1.9E+4 |
1.3E+0 |
1.9E+0 |
3.7E+3 |
8.2E+2 |
1.6E+3 |
3.9E+3 |
4.0E+4 |
1.1E+4 |
cps |
1.1E+4 |
6.1E-2 |
7.9E-2 |
3.4E+2 |
2.6E+1 |
1.5E+2 |
8.0E+2 |
7.7E+3 |
5.5E+3 |
rej1 |
  |
  |
  |
  |
  |
  |
  |
  |
  |
rej2 |
  |
  |
  |
  |
  |
  |
  |
  |
  |
RATIOS
  |
204/206 |
207/206 |
208/206 |
196/238 |
206/238 |
248/238 |
254/238 |
error +- |
-0.000050 |
0.074459 |
0.451487 |
13.351317 |
0.429455 |
9.674842 |
6.927291 |
ratio |
-0.000151 |
0.001720 |
0.006911 |
0.135232 |
0.004854 |
0.089307 |
0.082040 |
CALIBRATION
CALIBRATION
Zr20/U=1.3034 Pb/U=0.2257 UO/U=6.9737 (Pb/U=0.00895(UO/U)^2)
REDUCED DATA
  |
rad cor |
+- |
age Ma |
+- |
  |
uncorrected |
  |
  |
  |
  |
  |
Pb206/U238 |
0.1746 |
0.0046 |
1037.6518 |
25.1 |
  |
Pb207/Pb206 |
0.0745 |
0.0017 |
1053.9220 |
45.9 |
  |
Pb207/U235 |
1.7930 |
0.0665 |
1042.9028 |
23.9 |
  |
Pb208/Th232 |
0.0510 |
0.0017 |
1005.6562 |
33.2 |
  |
204 corrected |
  |
  |
  |
  |
  |
Pb206/U238 |
0.1748 |
0.0046 |
1038.4231 |
25.2 |
  |
Pb207/Pb206 |
0.0752 |
0.0029 |
1073.1057 |
75.5 |
  |
Pb207/U235 |
1.8116 |
0.0893 |
1049.6564 |
31.8 |
  |
Pb208/Pb206 |
0.4529 |
0.0088 |
  |
  |
  |
Pb208/Th232 |
0.0512 |
0.0018 |
1009.5529 |
35.5 |
  |
207 corrected |
  |
  |
  |
  |
  |
Pb206/U238 |
0.1745 |
0.0046 |
1037.0365 |
25.2 |
  |
Pb208/Pb206 |
0.4503 |
0.0082 |
  |
  |
  |
Pb208/Th232 |
0.0509 |
0.0018 |
1002.5471 |
34.5 |
  |
208 corrected |
  |
  |
  |
  |
  |
Pb206/U238 |
0.1761 |
0.0047 |
1045.6615 |
25.8 |
  |
Pb207/Pb206 |
0.0818 |
0.0056 |
1241.1400 |
129.3 |
  |
Pb207/U235 |
1.9866 |
0.1529 |
1110.9768 |
50.7 |
  |
CONCENTRATIONS
CONCENTRATIONS
U:87.8 ppm Th:135.7 ppm Th/U:1.546 ±0.0 Pb204:-0.7 ppb sens 16.9


