SHRIMP II v2 SW v2.13 ACQUISITION DATA PRINTOUT
analyst GSWA, mount G14-21-1,
506-12.1, 2014-08-14, 16:31:53, 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=2815
primary beam = -1.8nA
QT1 Y defl = -1707 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 |
195.82010 |
0.00000 |
2.0 |
8.0 |
12 |
YES 3.0 |
REF |
ALW |
COUNTER |
R 1.0E-12 |
2 |
Pb204 |
203.97810 |
0.00000 |
10.0 |
3.0 |
11 |
NO 10.0 |
NONE |
ALW |
COUNTER |
  |
3 |
Bkgrnd |
204.02310 |
0.00000 |
10.0 |
5.0 |
11 |
NO 0.5 |
BAC |
ALW |
COUNTER |
  |
4 |
Pb206 |
205.98380 |
0.00000 |
10.0 |
4.0 |
11 |
YES 6.0 |
REF |
ALW |
COUNTER |
R 1.0E-12 |
5 |
Pb207 |
206.98881 |
0.00000 |
30.0 |
2.0 |
11 |
NO 5.0 |
NONE |
ALW |
COUNTER |
FS+10mV=1Mcps=FIXED As |
6 |
Pb208 |
207.99181 |
0.00000 |
10.0 |
2.0 |
11 |
NO 4.0 |
NONE |
ALW |
COUNTER |
  |
7 |
U238 |
238.06958 |
0.00000 |
5.0 |
3.0 |
10 |
YES 3.0 |
REF |
ALW |
COUNTER |
  |
8 |
ThO248 |
248.04462 |
0.00000 |
5.0 |
3.0 |
9 |
YES 3.0 |
NONE |
ALW |
COUNTER |
  |
9 |
UO254 |
254.05170 |
0.00000 |
2.0 |
3.0 |
9 |
YES 2.0 |
REF |
ALW |
COUNTER |
  |
AMU-B calibration field offset -0.076 G.
DATA
Zr2O |
18087 |
  |
18870 |
  |
19717 |
  |
19803 |
  |
20116 |
R |
20196 |
  |
Pb204 |
3 |
  |
2 |
  |
2 |
  |
1 |
  |
1 |
  |
1 |
  |
Bkgrnd |
1 |
  |
0 |
  |
0 |
  |
2 |
  |
0 |
  |
1 |
  |
Pb206 |
3447 |
  |
3507 |
  |
3403 |
  |
3450 |
  |
3367 |
  |
3168 |
R |
Pb207 |
883 |
  |
831 |
  |
824 |
  |
844 |
  |
784 |
  |
747 |
R |
Pb208 |
967 |
  |
991 |
  |
932 |
  |
957 |
  |
979 |
  |
852 |
  |
U238 |
3426 |
  |
3498 |
  |
3506 |
  |
3408 |
  |
3551 |
  |
3531 |
  |
ThO248 |
21152 |
  |
20637 |
  |
20440 |
  |
20900 |
  |
20018 |
  |
20251 |
  |
UO254 |
9795 |
  |
9548 |
  |
9400 |
  |
9635 |
  |
9309 |
  |
9540 |
  |
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 |
3.1 |
0.1 |
0.3 |
1.9 |
0.6 |
2.1 |
0.8 |
2.7 |
2.7 |
slope |
2.0 |
-0.0 |
0.0 |
-0.3 |
-0.1 |
-0.1 |
0.1 |
-1.2 |
-0.3 |
interc |
1.9E+4 |
2.8E+0 |
5.1E-1 |
3.5E+3 |
8.9E+2 |
1.0E+3 |
3.4E+3 |
2.1E+4 |
9.7E+3 |
cps |
9.8E+3 |
1.6E-1 |
6.7E-2 |
3.4E+2 |
2.7E+1 |
9.5E+1 |
7.0E+2 |
4.1E+3 |
4.8E+3 |
rej1 |
18087 |
  |
  |
  |
  |
  |
  |
20900 |
  |
rej2 |
  |
  |
  |
  |
  |
  |
  |
  |
  |
RATIOS
  |
204/206 |
207/206 |
208/206 |
196/238 |
206/238 |
248/238 |
254/238 |
error +- |
0.000265 |
0.080680 |
0.280475 |
14.140666 |
0.487263 |
5.913730 |
6.874528 |
ratio |
0.000166 |
0.001396 |
0.006059 |
0.121938 |
0.005827 |
0.049300 |
0.067044 |
CALIBRATION
CALIBRATION
Zr20/U=1.3034 Pb/U=0.2257 UO/U=6.9737 (Pb/U=0.01031(UO/U)^2)
REDUCED DATA
  |
rad cor |
+- |
age Ma |
+- |
  |
uncorrected |
  |
  |
  |
  |
  |
Pb206/U238 |
0.2012 |
0.0046 |
1181.7985 |
24.7 |
  |
Pb207/Pb206 |
0.0807 |
0.0014 |
1213.6575 |
33.7 |
  |
Pb207/U235 |
2.2382 |
0.0680 |
1193.1086 |
21.1 |
  |
Pb208/Th232 |
0.0594 |
0.0020 |
1165.8048 |
38.5 |
  |
204 corrected |
  |
  |
  |
  |
  |
Pb206/U238 |
0.2004 |
0.0046 |
1177.2112 |
24.7 |
  |
Pb207/Pb206 |
0.0769 |
0.0029 |
1119.1672 |
73.8 |
  |
Pb207/U235 |
2.1249 |
0.0994 |
1156.9407 |
31.8 |
  |
Pb208/Pb206 |
0.2722 |
0.0085 |
  |
  |
  |
Pb208/Th232 |
0.0574 |
0.0023 |
1127.5440 |
44.9 |
  |
207 corrected |
  |
  |
  |
  |
  |
Pb206/U238 |
0.2009 |
0.0046 |
1179.9913 |
24.7 |
  |
Pb208/Pb206 |
0.2772 |
0.0070 |
  |
  |
  |
Pb208/Th232 |
0.0586 |
0.0021 |
1150.7373 |
40.8 |
  |
208 corrected |
  |
  |
  |
  |
  |
Pb206/U238 |
0.2016 |
0.0047 |
1183.9985 |
25.0 |
  |
Pb207/Pb206 |
0.0825 |
0.0038 |
1256.7412 |
87.0 |
  |
Pb207/U235 |
2.2926 |
0.1234 |
1210.0158 |
37.4 |
  |
CONCENTRATIONS
CONCENTRATIONS
U:82.5 ppm Th:78.4 ppm Th/U:0.950 ±0.0 Pb204:3.8 ppb sens 16.6


