SHRIMP II v2 SW v2.13 ACQUISITION DATA PRINTOUT
analyst GSWA, mount G14-21-1,
506-8.1, 2014-08-14, 14:37:34, 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=1343, z=2535
primary beam = -1.8nA
QT1 Y defl = -1740 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 |
195.81799 |
0.00000 |
2.0 |
8.0 |
12 |
YES 3.0 |
REF |
ALW |
COUNTER |
R 1.0E-12 |
2 |
Pb204 |
203.97598 |
0.00000 |
10.0 |
3.0 |
11 |
NO 10.0 |
NONE |
ALW |
COUNTER |
  |
3 |
Bkgrnd |
204.02098 |
0.00000 |
10.0 |
5.0 |
11 |
NO 0.5 |
BAC |
ALW |
COUNTER |
  |
4 |
Pb206 |
205.98131 |
0.00000 |
10.0 |
4.0 |
11 |
YES 6.0 |
REF |
ALW |
COUNTER |
R 1.0E-12 |
5 |
Pb207 |
206.98632 |
0.00000 |
30.0 |
2.0 |
11 |
NO 5.0 |
NONE |
ALW |
COUNTER |
FS+10mV=1Mcps=FIXED As |
6 |
Pb208 |
207.98932 |
0.00000 |
10.0 |
2.0 |
11 |
NO 4.0 |
NONE |
ALW |
COUNTER |
  |
7 |
U238 |
238.06611 |
0.00000 |
5.0 |
3.0 |
10 |
YES 3.0 |
REF |
ALW |
COUNTER |
  |
8 |
ThO248 |
248.04340 |
0.00000 |
5.0 |
3.0 |
9 |
YES 3.0 |
NONE |
ALW |
COUNTER |
  |
9 |
UO254 |
254.04846 |
0.00000 |
2.0 |
3.0 |
9 |
YES 2.0 |
REF |
ALW |
COUNTER |
  |
AMU-B calibration field offset -0.076 G.
DATA
Zr2O |
18385 |
  |
18460 |
  |
19831 |
  |
19934 |
  |
20398 |
  |
20504 |
  |
Pb204 |
5 |
  |
1 |
  |
1 |
  |
3 |
  |
0 |
  |
1 |
  |
Bkgrnd |
1 |
  |
3 |
  |
0 |
  |
0 |
  |
1 |
  |
0 |
  |
Pb206 |
2687 |
  |
2658 |
  |
2634 |
  |
2527 |
  |
2422 |
  |
2465 |
  |
Pb207 |
657 |
  |
632 |
  |
627 |
  |
583 |
  |
613 |
  |
573 |
  |
Pb208 |
933 |
  |
998 |
  |
958 |
  |
999 |
  |
954 |
  |
905 |
  |
U238 |
2422 |
  |
2462 |
  |
2571 |
  |
2632 |
  |
2542 |
  |
2584 |
  |
ThO248 |
20488 |
  |
19858 |
  |
20099 |
  |
19802 |
  |
20125 |
  |
20545 |
  |
UO254 |
7106 |
  |
7090 |
  |
7071 |
  |
7000 |
  |
6934 |
R |
7141 |
  |
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 |
3.7 |
1.5 |
0.4 |
0.7 |
0.5 |
1.6 |
1.3 |
2.5 |
1.0 |
slope |
3.2 |
-0.0 |
-0.0 |
-0.4 |
-0.1 |
-0.0 |
0.2 |
0.9 |
-0.1 |
interc |
1.8E+4 |
3.5E+0 |
1.7E+0 |
2.7E+3 |
6.6E+2 |
9.8E+2 |
2.4E+3 |
2.0E+4 |
7.1E+3 |
cps |
9.8E+3 |
1.7E-1 |
7.9E-2 |
2.6E+2 |
2.1E+1 |
9.6E+1 |
5.0E+2 |
4.0E+3 |
3.5E+3 |
rej1 |
19831 |
  |
  |
  |
  |
  |
  |
20488 |
  |
rej2 |
  |
  |
  |
  |
  |
  |
  |
  |
  |
RATIOS
  |
204/206 |
207/206 |
208/206 |
196/238 |
206/238 |
248/238 |
254/238 |
error +- |
0.000351 |
0.079807 |
0.373828 |
19.465702 |
0.508756 |
7.909097 |
7.002579 |
ratio |
0.000271 |
0.001466 |
0.006861 |
0.212077 |
0.006273 |
0.082013 |
0.073650 |
CALIBRATION
CALIBRATION
Zr20/U=1.3034 Pb/U=0.2257 UO/U=6.9737 (Pb/U=0.01038(UO/U)^2)
REDUCED DATA
  |
rad cor |
+- |
age Ma |
+- |
  |
uncorrected |
  |
  |
  |
  |
  |
Pb206/U238 |
0.2025 |
0.0049 |
1188.5695 |
26.4 |
  |
Pb207/Pb206 |
0.0798 |
0.0015 |
1192.2209 |
35.8 |
  |
Pb207/U235 |
2.2279 |
0.0720 |
1189.8654 |
22.4 |
  |
Pb208/Th232 |
0.0604 |
0.0020 |
1185.5596 |
39.0 |
  |
204 corrected |
  |
  |
  |
  |
  |
Pb206/U238 |
0.2013 |
0.0050 |
1182.4703 |
26.7 |
  |
Pb207/Pb206 |
0.0748 |
0.0044 |
1063.8111 |
115.2 |
  |
Pb207/U235 |
2.0771 |
0.1396 |
1141.2846 |
45.1 |
  |
Pb208/Pb206 |
0.3634 |
0.0120 |
  |
  |
  |
Pb208/Th232 |
0.0584 |
0.0026 |
1146.9700 |
48.9 |
  |
207 corrected |
  |
  |
  |
  |
  |
Pb206/U238 |
0.2024 |
0.0049 |
1188.0860 |
26.5 |
  |
Pb208/Pb206 |
0.3730 |
0.0078 |
  |
  |
  |
Pb208/Th232 |
0.0602 |
0.0021 |
1182.5019 |
40.7 |
  |
208 corrected |
  |
  |
  |
  |
  |
Pb206/U238 |
0.2026 |
0.0050 |
1189.1418 |
26.9 |
  |
Pb207/Pb206 |
0.0803 |
0.0048 |
1203.6708 |
113.9 |
  |
Pb207/U235 |
2.2421 |
0.1519 |
1194.3084 |
46.5 |
  |
CONCENTRATIONS
CONCENTRATIONS
U:60.6 ppm Th:76.0 ppm Th/U:1.253 ±0.0 Pb204:3.7 ppb sens 16.7


