SHRIMP II v2 SW v2.13 ACQUISITION DATA PRINTOUT
analyst GSWA, mount G14-21-1,
506-7.1, 2014-08-14, 14:18:35, 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=1423, z=2495
primary beam = -1.8nA
QT1 Y defl = -1728 bits; QT1 Z defl = 385 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 |
195.81665 |
0.00000 |
2.0 |
8.0 |
12 |
YES 3.0 |
REF |
ALW |
COUNTER |
R 1.0E-12 |
2 |
Pb204 |
203.97465 |
0.00000 |
10.0 |
3.0 |
11 |
NO 10.0 |
NONE |
ALW |
COUNTER |
  |
3 |
Bkgrnd |
204.01965 |
0.00000 |
10.0 |
5.0 |
11 |
NO 0.5 |
BAC |
ALW |
COUNTER |
  |
4 |
Pb206 |
205.98012 |
0.00000 |
10.0 |
4.0 |
11 |
YES 6.0 |
REF |
ALW |
COUNTER |
R 1.0E-12 |
5 |
Pb207 |
206.98513 |
0.00000 |
30.0 |
2.0 |
11 |
NO 5.0 |
NONE |
ALW |
COUNTER |
FS+10mV=1Mcps=FIXED As |
6 |
Pb208 |
207.98813 |
0.00000 |
10.0 |
2.0 |
11 |
NO 4.0 |
NONE |
ALW |
COUNTER |
  |
7 |
U238 |
238.06585 |
0.00000 |
5.0 |
3.0 |
10 |
YES 3.0 |
REF |
ALW |
COUNTER |
  |
8 |
ThO248 |
248.04146 |
0.00000 |
5.0 |
3.0 |
9 |
YES 3.0 |
NONE |
ALW |
COUNTER |
  |
9 |
UO254 |
254.04820 |
0.00000 |
2.0 |
3.0 |
9 |
YES 2.0 |
REF |
ALW |
COUNTER |
  |
AMU-B calibration field offset -0.076 G.
DATA
Zr2O |
18390 |
  |
18796 |
  |
19324 |
  |
20005 |
  |
19915 |
  |
20277 |
  |
Pb204 |
1 |
  |
3 |
  |
2 |
  |
1 |
  |
2 |
  |
2 |
  |
Bkgrnd |
1 |
  |
1 |
  |
0 |
  |
0 |
  |
0 |
  |
0 |
  |
Pb206 |
1750 |
  |
1816 |
  |
1688 |
  |
1756 |
  |
1727 |
  |
1609 |
  |
Pb207 |
456 |
  |
452 |
  |
413 |
  |
442 |
  |
369 |
  |
362 |
  |
Pb208 |
648 |
  |
594 |
  |
612 |
  |
583 |
  |
512 |
  |
479 |
  |
U238 |
1671 |
  |
1724 |
  |
1822 |
  |
1702 |
  |
1683 |
  |
1675 |
  |
ThO248 |
13537 |
  |
13074 |
  |
12188 |
  |
11658 |
  |
10884 |
  |
10929 |
  |
UO254 |
5085 |
  |
5014 |
  |
4911 |
  |
4705 |
  |
4760 |
  |
4844 |
  |
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 |
2.3 |
0.5 |
0.0 |
1.9 |
1.1 |
1.0 |
2.2 |
0.9 |
2.1 |
slope |
2.5 |
0.0 |
-0.0 |
-0.2 |
-0.1 |
-0.2 |
-0.0 |
-4.4 |
-0.4 |
interc |
1.8E+4 |
1.8E+0 |
9.8E-1 |
1.8E+3 |
4.8E+2 |
6.8E+2 |
1.7E+3 |
1.4E+4 |
5.1E+3 |
cps |
9.8E+3 |
1.8E-1 |
3.0E-2 |
1.7E+2 |
1.4E+1 |
5.8E+1 |
3.4E+2 |
2.5E+3 |
2.5E+3 |
rej1 |
  |
  |
  |
  |
  |
  |
  |
10929 |
  |
rej2 |
  |
  |
  |
  |
  |
  |
  |
  |
  |
RATIOS
  |
204/206 |
207/206 |
208/206 |
196/238 |
206/238 |
248/238 |
254/238 |
error +- |
0.000891 |
0.080809 |
0.337021 |
28.515753 |
0.502656 |
7.157609 |
7.174625 |
ratio |
0.000357 |
0.002031 |
0.007348 |
0.434448 |
0.009996 |
0.107663 |
0.120670 |
CALIBRATION
CALIBRATION
Zr20/U=1.3034 Pb/U=0.2257 UO/U=6.9737 (Pb/U=0.00977(UO/U)^2)
REDUCED DATA
  |
rad cor |
+- |
age Ma |
+- |
  |
uncorrected |
  |
  |
  |
  |
  |
Pb206/U238 |
0.1906 |
0.0074 |
1124.4213 |
40.2 |
  |
Pb207/Pb206 |
0.0808 |
0.0020 |
1216.8026 |
48.6 |
  |
Pb207/U235 |
2.1232 |
0.1041 |
1156.3889 |
33.3 |
  |
Pb208/Th232 |
0.0577 |
0.0029 |
1134.3040 |
55.2 |
  |
204 corrected |
  |
  |
  |
  |
  |
Pb206/U238 |
0.1878 |
0.0074 |
1109.7015 |
40.1 |
  |
Pb207/Pb206 |
0.0681 |
0.0059 |
870.8001 |
170.1 |
  |
Pb207/U235 |
1.7631 |
0.1759 |
1032.0002 |
62.6 |
  |
Pb208/Pb206 |
0.3097 |
0.0150 |
  |
  |
  |
Pb208/Th232 |
0.0523 |
0.0035 |
1030.1018 |
66.7 |
  |
207 corrected |
  |
  |
  |
  |
  |
Pb206/U238 |
0.1896 |
0.0074 |
1119.4646 |
40.1 |
  |
Pb208/Pb206 |
0.3279 |
0.0090 |
  |
  |
  |
Pb208/Th232 |
0.0559 |
0.0030 |
1099.2489 |
56.5 |
  |
208 corrected |
  |
  |
  |
  |
  |
Pb206/U238 |
0.1903 |
0.0075 |
1122.7769 |
40.5 |
  |
Pb207/Pb206 |
0.0794 |
0.0057 |
1182.1974 |
136.5 |
  |
Pb207/U235 |
2.0830 |
0.1803 |
1143.2124 |
57.7 |
  |
CONCENTRATIONS
CONCENTRATIONS
U:42.1 ppm Th:46.8 ppm Th/U:1.113 ±0.0 Pb204:6.1 ppb sens 16.9


