SHRIMP II v2 SW v2.13 ACQUISITION DATA PRINTOUT
analyst GSWA, mount G14-21-1,
BRA-9.1, 2014-08-15, 01:54:14, 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=1723, z=2438
primary beam = -1.9nA
QT1 Y defl = -1733 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 |
195.82460 |
0.00000 |
2.0 |
8.0 |
12 |
YES 3.0 |
REF |
ALW |
COUNTER |
R 1.0E-12 |
2 |
Pb204 |
203.98260 |
0.00000 |
10.0 |
3.0 |
11 |
NO 10.0 |
NONE |
ALW |
COUNTER |
  |
3 |
Bkgrnd |
204.02760 |
0.00000 |
10.0 |
5.0 |
11 |
NO 0.5 |
BAC |
ALW |
COUNTER |
  |
4 |
Pb206 |
205.98945 |
0.00000 |
10.0 |
4.0 |
11 |
YES 6.0 |
REF |
ALW |
COUNTER |
R 1.0E-12 |
5 |
Pb207 |
206.99446 |
0.00000 |
30.0 |
2.0 |
11 |
NO 5.0 |
NONE |
ALW |
COUNTER |
FS+10mV=1Mcps=FIXED As |
6 |
Pb208 |
207.99746 |
0.00000 |
10.0 |
2.0 |
11 |
NO 4.0 |
NONE |
ALW |
COUNTER |
  |
7 |
U238 |
238.07515 |
0.00000 |
5.0 |
3.0 |
10 |
YES 3.0 |
REF |
ALW |
COUNTER |
  |
8 |
ThO248 |
248.05170 |
0.00000 |
5.0 |
3.0 |
9 |
YES 3.0 |
NONE |
ALW |
COUNTER |
  |
9 |
UO254 |
254.05819 |
0.00000 |
2.0 |
3.0 |
9 |
YES 2.0 |
REF |
ALW |
COUNTER |
  |
AMU-B calibration field offset -0.076 G.
DATA
Zr2O |
18672 |
  |
19132 |
  |
20031 |
  |
20252 |
  |
20634 |
  |
21042 |
  |
Pb204 |
3 |
  |
0 |
  |
0 |
  |
1 |
  |
1 |
  |
0 |
  |
Bkgrnd |
3 |
  |
1 |
  |
0 |
  |
2 |
  |
0 |
  |
0 |
  |
Pb206 |
18571 |
  |
18026 |
  |
17866 |
  |
17751 |
  |
17594 |
  |
17426 |
  |
Pb207 |
3290 |
  |
3199 |
  |
3183 |
  |
3128 |
  |
3079 |
  |
3023 |
R |
Pb208 |
1282 |
  |
1245 |
  |
1238 |
  |
1173 |
  |
1198 |
  |
1288 |
  |
U238 |
35509 |
  |
36268 |
  |
36993 |
  |
37791 |
  |
37846 |
  |
39198 |
  |
ThO248 |
53883 |
  |
53447 |
  |
53573 |
  |
53727 |
  |
53624 |
  |
54093 |
  |
UO254 |
106193 |
  |
106014 |
  |
107067 |
  |
106453 |
  |
106551 |
  |
107492 |
  |
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 |
1.7 |
0.3 |
0.4 |
1.0 |
0.1 |
2.0 |
1.9 |
1.1 |
1.7 |
slope |
3.1 |
-0.0 |
-0.0 |
-1.3 |
-0.3 |
-0.0 |
4.5 |
0.3 |
1.4 |
interc |
1.9E+4 |
1.7E+0 |
2.3E+0 |
1.8E+4 |
3.3E+3 |
1.3E+3 |
3.5E+4 |
5.4E+4 |
1.1E+5 |
cps |
1.0E+4 |
7.6E-2 |
9.4E-2 |
1.8E+3 |
1.1E+2 |
1.2E+2 |
7.4E+3 |
1.1E+4 |
5.3E+4 |
rej1 |
  |
  |
  |
  |
  |
  |
  |
  |
  |
rej2 |
  |
  |
  |
  |
  |
  |
  |
  |
  |
RATIOS
  |
204/206 |
207/206 |
208/206 |
196/238 |
206/238 |
248/238 |
254/238 |
error +- |
-0.000010 |
0.058851 |
0.069257 |
1.359176 |
0.241722 |
1.452306 |
7.201051 |
ratio |
-0.000034 |
0.000466 |
0.001159 |
0.006453 |
0.001032 |
0.004991 |
0.024138 |
CALIBRATION
CALIBRATION
Zr20/U=1.3034 Pb/U=0.2257 UO/U=6.9737 (Pb/U=0.00466(UO/U)^2)
REDUCED DATA
  |
rad cor |
+- |
age Ma |
+- |
  |
uncorrected |
  |
  |
  |
  |
  |
Pb206/U238 |
0.0910 |
0.0007 |
561.2591 |
4.3 |
  |
Pb207/Pb206 |
0.0589 |
0.0005 |
561.5872 |
17.2 |
  |
Pb207/U235 |
0.7381 |
0.0088 |
561.3240 |
5.1 |
  |
Pb208/Th232 |
0.0280 |
0.0005 |
557.9255 |
10.5 |
  |
204 corrected |
  |
  |
  |
  |
  |
Pb206/U238 |
0.0910 |
0.0007 |
561.3462 |
4.3 |
  |
Pb207/Pb206 |
0.0590 |
0.0007 |
566.9963 |
25.5 |
  |
Pb207/U235 |
0.7401 |
0.0111 |
562.4656 |
6.5 |
  |
Pb208/Pb206 |
0.0696 |
0.0017 |
  |
  |
  |
Pb208/Th232 |
0.0281 |
0.0007 |
560.7953 |
14.2 |
  |
207 corrected |
  |
  |
  |
  |
  |
Pb206/U238 |
0.0910 |
0.0007 |
561.2552 |
4.3 |
  |
Pb208/Pb206 |
0.0692 |
0.0016 |
  |
  |
  |
Pb208/Th232 |
0.0280 |
0.0007 |
557.7979 |
13.9 |
  |
208 corrected |
  |
  |
  |
  |
  |
Pb206/U238 |
0.0910 |
0.0007 |
561.3636 |
4.3 |
  |
Pb207/Pb206 |
0.0590 |
0.0007 |
568.0709 |
26.0 |
  |
Pb207/U235 |
0.7405 |
0.0113 |
562.6928 |
6.6 |
  |
CONCENTRATIONS
CONCENTRATIONS
U:884.5 ppm Th:199.1 ppm Th/U:0.225 ±0.0 Pb204:-0.7 ppb sens 17.0


