SHRIMP II v2 SW v2.13 ACQUISITION DATA PRINTOUT
analyst GSWA, mount G14-21-1,
506-4.1, 2014-08-14, 13:02:32, 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=7978, y=1527, z=2360
primary beam = -1.8nA
QT1 Y defl = -1719 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 |
195.81680 |
0.00000 |
2.0 |
8.0 |
12 |
YES 3.0 |
REF |
ALW |
COUNTER |
R 1.0E-12 |
2 |
Pb204 |
203.97480 |
0.00000 |
10.0 |
3.0 |
11 |
NO 10.0 |
NONE |
ALW |
COUNTER |
  |
3 |
Bkgrnd |
204.01980 |
0.00000 |
10.0 |
5.0 |
11 |
NO 0.5 |
BAC |
ALW |
COUNTER |
  |
4 |
Pb206 |
205.98048 |
0.00000 |
10.0 |
4.0 |
11 |
YES 6.0 |
REF |
ALW |
COUNTER |
R 1.0E-12 |
5 |
Pb207 |
206.98548 |
0.00000 |
30.0 |
2.0 |
11 |
NO 5.0 |
NONE |
ALW |
COUNTER |
FS+10mV=1Mcps=FIXED As |
6 |
Pb208 |
207.98848 |
0.00000 |
10.0 |
2.0 |
11 |
NO 4.0 |
NONE |
ALW |
COUNTER |
  |
7 |
U238 |
238.06547 |
0.00000 |
5.0 |
3.0 |
10 |
YES 3.0 |
REF |
ALW |
COUNTER |
  |
8 |
ThO248 |
248.04101 |
0.00000 |
5.0 |
3.0 |
9 |
YES 3.0 |
NONE |
ALW |
COUNTER |
  |
9 |
UO254 |
254.04786 |
0.00000 |
2.0 |
3.0 |
9 |
YES 2.0 |
REF |
ALW |
COUNTER |
  |
AMU-B calibration field offset -0.076 G.
DATA
Zr2O |
18970 |
  |
19428 |
  |
20771 |
  |
20608 |
  |
21414 |
  |
21196 |
  |
Pb204 |
1 |
  |
1 |
  |
0 |
  |
3 |
  |
2 |
  |
0 |
  |
Bkgrnd |
0 |
  |
2 |
  |
1 |
  |
0 |
  |
0 |
  |
0 |
  |
Pb206 |
2588 |
  |
2518 |
  |
2534 |
  |
2475 |
  |
2621 |
  |
2438 |
  |
Pb207 |
612 |
  |
598 |
  |
576 |
  |
587 |
  |
589 |
  |
583 |
  |
Pb208 |
542 |
  |
532 |
  |
560 |
  |
576 |
  |
588 |
  |
531 |
  |
U238 |
2309 |
  |
2380 |
  |
2328 |
  |
2444 |
  |
2598 |
  |
2411 |
  |
ThO248 |
11637 |
  |
11458 |
  |
11662 |
  |
12054 |
  |
12059 |
  |
11746 |
  |
UO254 |
6850 |
  |
7151 |
  |
6931 |
  |
6971 |
  |
7140 |
  |
7030 |
R |
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 |
4.4 |
0.4 |
0.2 |
1.9 |
0.2 |
1.2 |
3.1 |
3.9 |
2.1 |
slope |
3.3 |
0.0 |
-0.0 |
-0.1 |
-0.0 |
0.0 |
0.2 |
0.5 |
0.2 |
interc |
1.9E+4 |
1.1E+0 |
1.1E+0 |
2.6E+3 |
6.1E+2 |
5.4E+2 |
2.3E+3 |
1.1E+4 |
6.9E+3 |
cps |
1.0E+4 |
1.2E-1 |
4.7E-2 |
2.5E+2 |
2.0E+1 |
5.5E+1 |
4.8E+2 |
2.3E+3 |
3.5E+3 |
rej1 |
20771 |
  |
  |
  |
  |
  |
  |
  |
  |
rej2 |
  |
  |
  |
  |
  |
  |
  |
  |
  |
RATIOS
  |
204/206 |
207/206 |
208/206 |
196/238 |
206/238 |
248/238 |
254/238 |
error +- |
0.000276 |
0.077795 |
0.218757 |
21.311932 |
0.527747 |
4.895493 |
7.301058 |
ratio |
0.000219 |
0.001574 |
0.004788 |
0.336555 |
0.009733 |
0.080242 |
0.118391 |
CALIBRATION
CALIBRATION
Zr20/U=1.3034 Pb/U=0.2257 UO/U=6.9737 (Pb/U=0.00990(UO/U)^2)
REDUCED DATA
  |
rad cor |
+- |
age Ma |
+- |
  |
uncorrected |
  |
  |
  |
  |
  |
Pb206/U238 |
0.1932 |
0.0072 |
1138.7150 |
38.8 |
  |
Pb207/Pb206 |
0.0778 |
0.0016 |
1141.6457 |
39.7 |
  |
Pb207/U235 |
2.0724 |
0.0924 |
1139.7241 |
30.1 |
  |
Pb208/Th232 |
0.0563 |
0.0028 |
1107.0730 |
52.7 |
  |
204 corrected |
  |
  |
  |
  |
  |
Pb206/U238 |
0.1924 |
0.0072 |
1134.0972 |
38.9 |
  |
Pb207/Pb206 |
0.0739 |
0.0037 |
1037.8715 |
98.7 |
  |
Pb207/U235 |
1.9591 |
0.1303 |
1101.5690 |
43.8 |
  |
Pb208/Pb206 |
0.2098 |
0.0092 |
  |
  |
  |
Pb208/Th232 |
0.0538 |
0.0033 |
1058.4805 |
64.0 |
  |
207 corrected |
  |
  |
  |
  |
  |
Pb206/U238 |
0.1931 |
0.0072 |
1138.3673 |
38.9 |
  |
Pb208/Pb206 |
0.2181 |
0.0062 |
  |
  |
  |
Pb208/Th232 |
0.0561 |
0.0029 |
1103.4162 |
56.2 |
  |
208 corrected |
  |
  |
  |
  |
  |
Pb206/U238 |
0.1938 |
0.0073 |
1142.0646 |
39.1 |
  |
Pb207/Pb206 |
0.0806 |
0.0037 |
1212.2829 |
88.8 |
  |
Pb207/U235 |
2.1546 |
0.1362 |
1166.5461 |
42.9 |
  |
CONCENTRATIONS
CONCENTRATIONS
U:56.9 ppm Th:42.7 ppm Th/U:0.751 ±0.0 Pb204:2.6 ppb sens 18.3


