SHRIMP II v2 SW v2.13 ACQUISITION DATA PRINTOUT
analyst GSWA, mount G14-21-1,
506-24.1, 2014-08-15, 03:17:16, 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=7996, y=1411, z=3532
primary beam = -1.9nA
QT1 Y defl = -1769 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 |
195.82432 |
0.00000 |
2.0 |
8.0 |
12 |
YES 3.0 |
REF |
ALW |
COUNTER |
R 1.0E-12 |
2 |
Pb204 |
203.98232 |
0.00000 |
10.0 |
3.0 |
11 |
NO 10.0 |
NONE |
ALW |
COUNTER |
  |
3 |
Bkgrnd |
204.02732 |
0.00000 |
10.0 |
5.0 |
11 |
NO 0.5 |
BAC |
ALW |
COUNTER |
  |
4 |
Pb206 |
205.98784 |
0.00000 |
10.0 |
4.0 |
11 |
YES 6.0 |
REF |
ALW |
COUNTER |
R 1.0E-12 |
5 |
Pb207 |
206.99284 |
0.00000 |
30.0 |
2.0 |
11 |
NO 5.0 |
NONE |
ALW |
COUNTER |
FS+10mV=1Mcps=FIXED As |
6 |
Pb208 |
207.99584 |
0.00000 |
10.0 |
2.0 |
11 |
NO 4.0 |
NONE |
ALW |
COUNTER |
  |
7 |
U238 |
238.07374 |
0.00000 |
5.0 |
3.0 |
10 |
YES 3.0 |
REF |
ALW |
COUNTER |
  |
8 |
ThO248 |
248.04945 |
0.00000 |
5.0 |
3.0 |
9 |
YES 3.0 |
NONE |
ALW |
COUNTER |
  |
9 |
UO254 |
254.05608 |
0.00000 |
2.0 |
3.0 |
9 |
YES 2.0 |
REF |
ALW |
COUNTER |
  |
AMU-B calibration field offset -0.076 G.
DATA
Zr2O |
18448 |
  |
19062 |
  |
19786 |
  |
20350 |
  |
20749 |
  |
21016 |
  |
Pb204 |
0 |
  |
5 |
  |
1 |
  |
2 |
  |
0 |
  |
1 |
  |
Bkgrnd |
1 |
  |
1 |
  |
0 |
  |
0 |
  |
0 |
  |
1 |
  |
Pb206 |
6985 |
  |
7065 |
  |
6890 |
  |
6899 |
  |
6776 |
  |
6778 |
  |
Pb207 |
1684 |
  |
1700 |
  |
1676 |
  |
1594 |
  |
1621 |
  |
1609 |
  |
Pb208 |
1707 |
  |
1751 |
  |
1698 |
  |
1730 |
  |
1679 |
  |
1654 |
  |
U238 |
6557 |
  |
6866 |
  |
7004 |
  |
7115 |
  |
7022 |
  |
6984 |
  |
ThO248 |
36953 |
  |
36754 |
  |
36679 |
  |
36354 |
  |
36668 |
  |
36467 |
  |
UO254 |
19586 |
  |
19572 |
  |
19721 |
  |
19874 |
  |
19696 |
  |
19623 |
  |
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 |
0.6 |
0.2 |
0.5 |
0.5 |
0.5 |
3.2 |
0.7 |
0.7 |
slope |
3.4 |
-0.0 |
-0.0 |
-0.4 |
-0.1 |
-0.1 |
0.5 |
-0.6 |
0.1 |
interc |
1.9E+4 |
2.2E+0 |
7.4E-1 |
7.1E+3 |
1.7E+3 |
1.7E+3 |
6.7E+3 |
3.7E+4 |
2.0E+4 |
cps |
1.0E+4 |
1.4E-1 |
4.9E-2 |
6.9E+2 |
5.5E+1 |
1.7E+2 |
1.4E+3 |
7.3E+3 |
9.8E+3 |
rej1 |
  |
  |
  |
  |
  |
  |
  |
  |
  |
rej2 |
  |
  |
  |
  |
  |
  |
  |
  |
  |
RATIOS
  |
204/206 |
207/206 |
208/206 |
196/238 |
206/238 |
248/238 |
254/238 |
error +- |
0.000138 |
0.079679 |
0.247379 |
7.277049 |
0.500577 |
5.324030 |
7.134499 |
ratio |
0.000080 |
0.000892 |
0.002734 |
0.069284 |
0.005060 |
0.048371 |
0.066342 |
CALIBRATION
CALIBRATION
Zr20/U=1.3034 Pb/U=0.2257 UO/U=6.9737 (Pb/U=0.00983(UO/U)^2)
REDUCED DATA
  |
rad cor |
+- |
age Ma |
+- |
  |
uncorrected |
  |
  |
  |
  |
  |
Pb206/U238 |
0.1919 |
0.0041 |
1131.7397 |
21.9 |
  |
Pb207/Pb206 |
0.0797 |
0.0009 |
1189.0528 |
22.0 |
  |
Pb207/U235 |
2.1084 |
0.0530 |
1151.5549 |
17.2 |
  |
Pb208/Th232 |
0.0571 |
0.0016 |
1122.6970 |
29.7 |
  |
204 corrected |
  |
  |
  |
  |
  |
Pb206/U238 |
0.1915 |
0.0041 |
1129.4493 |
21.9 |
  |
Pb207/Pb206 |
0.0777 |
0.0015 |
1139.9411 |
38.4 |
  |
Pb207/U235 |
2.0523 |
0.0628 |
1133.0452 |
20.7 |
  |
Pb208/Pb206 |
0.2430 |
0.0040 |
  |
  |
  |
Pb208/Th232 |
0.0560 |
0.0017 |
1100.9799 |
31.8 |
  |
207 corrected |
  |
  |
  |
  |
  |
Pb206/U238 |
0.1914 |
0.0041 |
1128.9705 |
21.9 |
  |
Pb208/Pb206 |
0.2421 |
0.0036 |
  |
  |
  |
Pb208/Th232 |
0.0557 |
0.0016 |
1096.4389 |
30.8 |
  |
208 corrected |
  |
  |
  |
  |
  |
Pb206/U238 |
0.1921 |
0.0041 |
1132.8142 |
22.1 |
  |
Pb207/Pb206 |
0.0806 |
0.0023 |
1211.4942 |
54.0 |
  |
Pb207/U235 |
2.1347 |
0.0794 |
1160.1252 |
25.4 |
  |
CONCENTRATIONS
CONCENTRATIONS
U:164.2 ppm Th:136.5 ppm Th/U:0.831 ±0.0 Pb204:3.7 ppb sens 16.5


