SHRIMP II v2 SW v2.13 ACQUISITION DATA PRINTOUT
analyst GSWA, mount G14-21-1,
BRA-5.1, 2014-08-14, 16:50:57, 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=7983, y=1823, z=2349
primary beam = -1.7nA
QT1 Y defl = -1749 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 |
195.82047 |
0.00000 |
2.0 |
8.0 |
12 |
YES 3.0 |
REF |
ALW |
COUNTER |
R 1.0E-12 |
2 |
Pb204 |
203.97847 |
0.00000 |
10.0 |
3.0 |
11 |
NO 10.0 |
NONE |
ALW |
COUNTER |
  |
3 |
Bkgrnd |
204.02347 |
0.00000 |
10.0 |
5.0 |
11 |
NO 0.5 |
BAC |
ALW |
COUNTER |
  |
4 |
Pb206 |
205.98284 |
0.00000 |
10.0 |
4.0 |
11 |
YES 6.0 |
REF |
ALW |
COUNTER |
R 1.0E-12 |
5 |
Pb207 |
206.98784 |
0.00000 |
30.0 |
2.0 |
11 |
NO 5.0 |
NONE |
ALW |
COUNTER |
FS+10mV=1Mcps=FIXED As |
6 |
Pb208 |
207.99084 |
0.00000 |
10.0 |
2.0 |
11 |
NO 4.0 |
NONE |
ALW |
COUNTER |
  |
7 |
U238 |
238.06959 |
0.00000 |
5.0 |
3.0 |
10 |
YES 3.0 |
REF |
ALW |
COUNTER |
  |
8 |
ThO248 |
248.04543 |
0.00000 |
5.0 |
3.0 |
9 |
YES 3.0 |
NONE |
ALW |
COUNTER |
  |
9 |
UO254 |
254.05201 |
0.00000 |
2.0 |
3.0 |
9 |
YES 2.0 |
REF |
ALW |
COUNTER |
  |
AMU-B calibration field offset -0.076 G.
DATA
Zr2O |
17721 |
  |
18346 |
  |
18565 |
  |
19113 |
  |
19614 |
  |
19861 |
  |
Pb204 |
4 |
  |
6 |
  |
1 |
  |
2 |
  |
0 |
  |
0 |
  |
Bkgrnd |
1 |
  |
0 |
  |
2 |
  |
0 |
  |
0 |
  |
6 |
  |
Pb206 |
16970 |
R |
16921 |
  |
16617 |
  |
15981 |
  |
15933 |
  |
15769 |
R |
Pb207 |
3043 |
  |
3103 |
  |
2917 |
  |
2847 |
  |
2916 |
  |
2871 |
  |
Pb208 |
1278 |
  |
1112 |
R |
1142 |
  |
1161 |
  |
1111 |
  |
1112 |
  |
U238 |
34109 |
  |
34985 |
  |
35112 |
  |
35678 |
  |
36261 |
  |
36701 |
  |
ThO248 |
51942 |
  |
51017 |
  |
50237 |
  |
50037 |
  |
50408 |
  |
50504 |
  |
UO254 |
101274 |
  |
99829 |
  |
98819 |
  |
99676 |
  |
99921 |
  |
100406 |
  |
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 |
0.6 |
1.0 |
0.8 |
1.7 |
1.6 |
2.4 |
0.7 |
3.1 |
2.8 |
slope |
2.8 |
-0.0 |
0.0 |
-1.8 |
-0.3 |
-0.2 |
3.2 |
-0.6 |
1.5 |
interc |
1.8E+4 |
5.0E+0 |
-3.5E-1 |
1.7E+4 |
3.1E+3 |
1.2E+3 |
3.4E+4 |
5.1E+4 |
9.9E+4 |
cps |
9.5E+3 |
1.9E-1 |
1.6E-1 |
1.6E+3 |
9.9E+1 |
1.2E+2 |
7.1E+3 |
1.0E+4 |
5.0E+4 |
rej1 |
  |
  |
  |
  |
  |
  |
  |
51942 |
101274 |
rej2 |
  |
  |
  |
  |
  |
  |
  |
  |
  |
RATIOS
  |
204/206 |
207/206 |
208/206 |
196/238 |
206/238 |
248/238 |
254/238 |
error +- |
0.000021 |
0.060113 |
0.070774 |
1.346917 |
0.232096 |
1.432871 |
7.053116 |
ratio |
0.000024 |
0.000630 |
0.001363 |
0.004955 |
0.001088 |
0.005525 |
0.021545 |
CALIBRATION
CALIBRATION
Zr20/U=1.3034 Pb/U=0.2257 UO/U=6.9737 (Pb/U=0.00467(UO/U)^2)
REDUCED DATA
  |
rad cor |
+- |
age Ma |
+- |
  |
uncorrected |
  |
  |
  |
  |
  |
Pb206/U238 |
0.0910 |
0.0007 |
561.7317 |
4.1 |
  |
Pb207/Pb206 |
0.0601 |
0.0006 |
607.6418 |
22.5 |
  |
Pb207/U235 |
0.7546 |
0.0104 |
570.9124 |
6.0 |
  |
Pb208/Th232 |
0.0285 |
0.0006 |
568.9443 |
12.0 |
  |
204 corrected |
  |
  |
  |
  |
  |
Pb206/U238 |
0.0910 |
0.0007 |
561.5541 |
4.1 |
  |
Pb207/Pb206 |
0.0598 |
0.0007 |
596.8956 |
26.3 |
  |
Pb207/U235 |
0.7507 |
0.0115 |
568.6033 |
6.6 |
  |
Pb208/Pb206 |
0.0701 |
0.0016 |
  |
  |
  |
Pb208/Th232 |
0.0283 |
0.0007 |
563.1124 |
13.8 |
  |
207 corrected |
  |
  |
  |
  |
  |
Pb206/U238 |
0.0909 |
0.0007 |
560.9792 |
4.2 |
  |
Pb208/Pb206 |
0.0678 |
0.0021 |
  |
  |
  |
Pb208/Th232 |
0.0273 |
0.0009 |
544.2232 |
17.1 |
  |
208 corrected |
  |
  |
  |
  |
  |
Pb206/U238 |
0.0910 |
0.0007 |
561.5049 |
4.2 |
  |
Pb207/Pb206 |
0.0597 |
0.0009 |
593.9076 |
32.0 |
  |
Pb207/U235 |
0.7496 |
0.0132 |
567.9634 |
7.6 |
  |
CONCENTRATIONS
CONCENTRATIONS
U:880.4 ppm Th:198.7 ppm Th/U:0.226 ±0.0 Pb204:1.4 ppb sens 16.8


