SHRIMP II v2 SW v2.13 ACQUISITION DATA PRINTOUT
analyst GSWA, mount G14-21-1,
BRA-3.1, 2014-08-14, 13:21:34, 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=7980, y=1814, z=2310
primary beam = -1.8nA
QT1 Y defl = -1737 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 |
195.81675 |
0.00000 |
2.0 |
8.0 |
12 |
YES 3.0 |
REF |
ALW |
COUNTER |
R 1.0E-12 |
2 |
Pb204 |
203.97475 |
0.00000 |
10.0 |
3.0 |
11 |
NO 10.0 |
NONE |
ALW |
COUNTER |
  |
3 |
Bkgrnd |
204.01975 |
0.00000 |
10.0 |
5.0 |
11 |
NO 0.5 |
BAC |
ALW |
COUNTER |
  |
4 |
Pb206 |
205.98121 |
0.00000 |
10.0 |
4.0 |
11 |
YES 6.0 |
REF |
ALW |
COUNTER |
R 1.0E-12 |
5 |
Pb207 |
206.98621 |
0.00000 |
30.0 |
2.0 |
11 |
NO 5.0 |
NONE |
ALW |
COUNTER |
FS+10mV=1Mcps=FIXED As |
6 |
Pb208 |
207.98921 |
0.00000 |
10.0 |
2.0 |
11 |
NO 4.0 |
NONE |
ALW |
COUNTER |
  |
7 |
U238 |
238.06509 |
0.00000 |
5.0 |
3.0 |
10 |
YES 3.0 |
REF |
ALW |
COUNTER |
  |
8 |
ThO248 |
248.04149 |
0.00000 |
5.0 |
3.0 |
9 |
YES 3.0 |
NONE |
ALW |
COUNTER |
  |
9 |
UO254 |
254.04827 |
0.00000 |
2.0 |
3.0 |
9 |
YES 2.0 |
REF |
ALW |
COUNTER |
  |
AMU-B calibration field offset -0.076 G.
DATA
Zr2O |
19292 |
  |
19682 |
  |
20413 |
  |
20764 |
  |
21582 |
  |
21648 |
  |
Pb204 |
2 |
  |
1 |
  |
0 |
  |
2 |
  |
1 |
  |
2 |
  |
Bkgrnd |
0 |
  |
0 |
  |
0 |
  |
0 |
  |
0 |
  |
0 |
  |
Pb206 |
17760 |
  |
17609 |
  |
17237 |
  |
16964 |
  |
16935 |
  |
16594 |
  |
Pb207 |
3213 |
  |
3129 |
  |
3131 |
  |
2992 |
  |
3122 |
  |
3037 |
  |
Pb208 |
1206 |
  |
1281 |
  |
1138 |
  |
1107 |
  |
1101 |
  |
1080 |
  |
U238 |
35706 |
  |
37303 |
  |
37722 |
  |
38925 |
  |
38865 |
  |
39794 |
  |
ThO248 |
53357 |
  |
53401 |
  |
53143 |
  |
52762 |
  |
53296 |
  |
53499 |
  |
UO254 |
105707 |
  |
105498 |
  |
104929 |
  |
105464 |
  |
105261 |
  |
106094 |
  |
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 |
1.5 |
0.2 |
0.0 |
0.4 |
1.2 |
1.8 |
2.3 |
1.6 |
1.7 |
slope |
3.3 |
0.0 |
-0.0 |
-1.5 |
-0.2 |
-0.2 |
4.0 |
0.0 |
0.3 |
interc |
1.9E+4 |
1.2E+0 |
-0.0E+0 |
1.8E+4 |
3.2E+3 |
1.3E+3 |
3.6E+4 |
5.3E+4 |
1.1E+5 |
cps |
1.0E+4 |
1.3E-1 |
-0.0E+0 |
1.7E+3 |
1.0E+2 |
1.2E+2 |
7.6E+3 |
1.1E+4 |
5.3E+4 |
rej1 |
  |
  |
  |
  |
  |
  |
35706 |
  |
  |
rej2 |
  |
  |
  |
  |
  |
  |
  |
  |
  |
RATIOS
  |
204/206 |
207/206 |
208/206 |
196/238 |
206/238 |
248/238 |
254/238 |
error +- |
0.000078 |
0.060296 |
0.067670 |
1.364535 |
0.226415 |
1.402784 |
6.946543 |
ratio |
0.000028 |
0.000527 |
0.001118 |
0.006481 |
0.001012 |
0.005507 |
0.025078 |
CALIBRATION
CALIBRATION
Zr20/U=1.3034 Pb/U=0.2257 UO/U=6.9737 (Pb/U=0.00469(UO/U)^2)
REDUCED DATA
  |
rad cor |
+- |
age Ma |
+- |
  |
uncorrected |
  |
  |
  |
  |
  |
Pb206/U238 |
0.0916 |
0.0008 |
564.7887 |
4.6 |
  |
Pb207/Pb206 |
0.0603 |
0.0005 |
614.2124 |
18.8 |
  |
Pb207/U235 |
0.7612 |
0.0098 |
574.7247 |
5.7 |
  |
Pb208/Th232 |
0.0277 |
0.0005 |
552.4284 |
10.5 |
  |
204 corrected |
  |
  |
  |
  |
  |
Pb206/U238 |
0.0915 |
0.0008 |
564.1108 |
4.6 |
  |
Pb207/Pb206 |
0.0592 |
0.0007 |
573.1543 |
24.8 |
  |
Pb207/U235 |
0.7460 |
0.0113 |
565.9113 |
6.5 |
  |
Pb208/Pb206 |
0.0650 |
0.0015 |
  |
  |
  |
Pb208/Th232 |
0.0266 |
0.0007 |
529.9200 |
13.1 |
  |
207 corrected |
  |
  |
  |
  |
  |
Pb206/U238 |
0.0914 |
0.0008 |
563.9640 |
4.6 |
  |
Pb208/Pb206 |
0.0644 |
0.0017 |
  |
  |
  |
Pb208/Th232 |
0.0263 |
0.0008 |
525.0440 |
14.8 |
  |
208 corrected |
  |
  |
  |
  |
  |
Pb206/U238 |
0.0916 |
0.0008 |
565.1732 |
4.6 |
  |
Pb207/Pb206 |
0.0609 |
0.0007 |
636.9939 |
26.1 |
  |
Pb207/U235 |
0.7699 |
0.0121 |
579.6901 |
6.9 |
  |
CONCENTRATIONS
CONCENTRATIONS
U:860.3 ppm Th:192.4 ppm Th/U:0.224 ±0.0 Pb204:5.3 ppb sens 17.0


