SHRIMP II v2 SW v2.13 ACQUISITION DATA PRINTOUT
analyst GSWA, mount G14-21-1,
702-7.1, 2014-08-15, 01:14:29, 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=2285, z=2640
primary beam = -1.9nA
QT1 Y defl = -1739 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 |
195.82524 |
0.00000 |
2.0 |
8.0 |
12 |
YES 3.0 |
REF |
ALW |
COUNTER |
R 1.0E-12 |
2 |
Pb204 |
203.98324 |
0.00000 |
10.0 |
3.0 |
11 |
NO 10.0 |
NONE |
ALW |
COUNTER |
  |
3 |
Bkgrnd |
204.02824 |
0.00000 |
10.0 |
5.0 |
11 |
NO 0.5 |
BAC |
ALW |
COUNTER |
  |
4 |
Pb206 |
205.98938 |
0.00000 |
10.0 |
4.0 |
11 |
YES 6.0 |
REF |
ALW |
COUNTER |
R 1.0E-12 |
5 |
Pb207 |
206.99439 |
0.00000 |
30.0 |
2.0 |
11 |
NO 5.0 |
NONE |
ALW |
COUNTER |
FS+10mV=1Mcps=FIXED As |
6 |
Pb208 |
207.99739 |
0.00000 |
10.0 |
2.0 |
11 |
NO 4.0 |
NONE |
ALW |
COUNTER |
  |
7 |
U238 |
238.07419 |
0.00000 |
5.0 |
3.0 |
10 |
YES 3.0 |
REF |
ALW |
COUNTER |
  |
8 |
ThO248 |
248.05122 |
0.00000 |
5.0 |
3.0 |
9 |
YES 3.0 |
NONE |
ALW |
COUNTER |
  |
9 |
UO254 |
254.05826 |
0.00000 |
2.0 |
3.0 |
9 |
YES 2.0 |
REF |
ALW |
COUNTER |
  |
AMU-B calibration field offset -0.076 G.
DATA
Zr2O |
18604 |
  |
19091 |
  |
20073 |
  |
20726 |
  |
20387 |
  |
20724 |
  |
Pb204 |
2 |
  |
0 |
  |
1 |
  |
1 |
  |
1 |
  |
2 |
  |
Bkgrnd |
0 |
  |
0 |
  |
0 |
  |
1 |
  |
1 |
  |
0 |
  |
Pb206 |
5932 |
  |
5816 |
  |
5787 |
  |
5771 |
  |
5598 |
  |
5415 |
  |
Pb207 |
1327 |
  |
1325 |
  |
1301 |
  |
1291 |
  |
1303 |
  |
1201 |
  |
Pb208 |
2834 |
  |
2739 |
  |
2829 |
  |
2851 |
  |
2700 |
  |
2594 |
  |
U238 |
6141 |
  |
6516 |
  |
6759 |
  |
6769 |
  |
6784 |
  |
6551 |
  |
ThO248 |
67490 |
  |
67994 |
  |
68889 |
  |
67049 |
  |
66476 |
  |
64469 |
  |
UO254 |
17957 |
  |
18327 |
  |
18688 |
  |
18294 |
  |
18270 |
  |
17726 |
  |
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 |
0.3 |
0.2 |
0.2 |
0.8 |
0.7 |
2.4 |
3.4 |
2.0 |
3.9 |
slope |
2.8 |
0.0 |
0.0 |
-0.6 |
-0.1 |
-0.2 |
0.1 |
-1.9 |
-1.1 |
interc |
1.9E+4 |
9.4E-1 |
1.1E-2 |
6.0E+3 |
1.4E+3 |
2.9E+3 |
6.6E+3 |
6.8E+4 |
1.9E+4 |
cps |
9.9E+3 |
1.2E-1 |
3.5E-2 |
5.7E+2 |
4.3E+1 |
2.8E+2 |
1.3E+3 |
1.3E+4 |
9.2E+3 |
rej1 |
20726 |
  |
  |
  |
  |
  |
6141 |
68889 |
17957 |
rej2 |
20073 |
  |
  |
  |
  |
  |
  |
64469 |
  |
RATIOS
  |
204/206 |
207/206 |
208/206 |
196/238 |
206/238 |
248/238 |
254/238 |
error +- |
0.000147 |
0.075372 |
0.484032 |
7.444149 |
0.429085 |
10.081715 |
6.913789 |
ratio |
0.000088 |
0.000948 |
0.006337 |
0.072286 |
0.004603 |
0.096124 |
0.076140 |
CALIBRATION
CALIBRATION
Zr20/U=1.3034 Pb/U=0.2257 UO/U=6.9737 (Pb/U=0.00898(UO/U)^2)
REDUCED DATA
  |
rad cor |
+- |
age Ma |
+- |
  |
uncorrected |
  |
  |
  |
  |
  |
Pb206/U238 |
0.1752 |
0.0043 |
1040.5681 |
23.5 |
  |
Pb207/Pb206 |
0.0754 |
0.0009 |
1078.4397 |
25.0 |
  |
Pb207/U235 |
1.8205 |
0.0526 |
1052.8591 |
18.8 |
  |
Pb208/Th232 |
0.0526 |
0.0016 |
1035.4310 |
31.6 |
  |
204 corrected |
  |
  |
  |
  |
  |
Pb206/U238 |
0.1748 |
0.0043 |
1038.3144 |
23.5 |
  |
Pb207/Pb206 |
0.0733 |
0.0017 |
1021.9405 |
45.1 |
  |
Pb207/U235 |
1.7660 |
0.0625 |
1033.0558 |
22.7 |
  |
Pb208/Pb206 |
0.4799 |
0.0071 |
  |
  |
  |
Pb208/Th232 |
0.0520 |
0.0017 |
1024.5306 |
32.1 |
  |
207 corrected |
  |
  |
  |
  |
  |
Pb206/U238 |
0.1749 |
0.0043 |
1038.9581 |
23.5 |
  |
Pb208/Pb206 |
0.4811 |
0.0068 |
  |
  |
  |
Pb208/Th232 |
0.0522 |
0.0017 |
1027.6441 |
31.9 |
  |
208 corrected |
  |
  |
  |
  |
  |
Pb206/U238 |
0.1754 |
0.0044 |
1041.9271 |
24.1 |
  |
Pb207/Pb206 |
0.0766 |
0.0053 |
1111.4206 |
133.4 |
  |
Pb207/U235 |
1.8533 |
0.1428 |
1064.6192 |
49.6 |
  |
CONCENTRATIONS
CONCENTRATIONS
U:157.2 ppm Th:253.6 ppm Th/U:1.613 ±0.0 Pb204:3.5 ppb sens 15.7


