SHRIMP II v2 SW v2.13 ACQUISITION DATA PRINTOUT
analyst GSWA, mount G14-21-1,
702-12.1, 2014-08-15, 08:02:16, 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=7985, y=2181, z=2879
primary beam = -2.0nA
QT1 Y defl = -1721 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 |
195.82470 |
0.00000 |
2.0 |
8.0 |
12 |
YES 3.0 |
REF |
ALW |
COUNTER |
R 1.0E-12 |
2 |
Pb204 |
203.98269 |
0.00000 |
10.0 |
3.0 |
11 |
NO 10.0 |
NONE |
ALW |
COUNTER |
  |
3 |
Bkgrnd |
204.02769 |
0.00000 |
10.0 |
5.0 |
11 |
NO 0.5 |
BAC |
ALW |
COUNTER |
  |
4 |
Pb206 |
205.98778 |
0.00000 |
10.0 |
4.0 |
11 |
YES 6.0 |
REF |
ALW |
COUNTER |
R 1.0E-12 |
5 |
Pb207 |
206.99279 |
0.00000 |
30.0 |
2.0 |
11 |
NO 5.0 |
NONE |
ALW |
COUNTER |
FS+10mV=1Mcps=FIXED As |
6 |
Pb208 |
207.99579 |
0.00000 |
10.0 |
2.0 |
11 |
NO 4.0 |
NONE |
ALW |
COUNTER |
  |
7 |
U238 |
238.07416 |
0.00000 |
5.0 |
3.0 |
10 |
YES 3.0 |
REF |
ALW |
COUNTER |
  |
8 |
ThO248 |
248.05033 |
0.00000 |
5.0 |
3.0 |
9 |
YES 3.0 |
NONE |
ALW |
COUNTER |
  |
9 |
UO254 |
254.05592 |
0.00000 |
2.0 |
3.0 |
9 |
YES 2.0 |
REF |
ALW |
COUNTER |
  |
AMU-B calibration field offset -0.076 G.
DATA
Zr2O |
20022 |
  |
20780 |
  |
21245 |
  |
21311 |
  |
21844 |
  |
22278 |
  |
Pb204 |
4 |
  |
1 |
  |
1 |
  |
0 |
  |
0 |
  |
1 |
  |
Bkgrnd |
3 |
  |
0 |
  |
1 |
  |
2 |
  |
1 |
  |
0 |
  |
Pb206 |
11443 |
  |
11192 |
  |
11162 |
  |
11278 |
  |
11560 |
  |
11969 |
  |
Pb207 |
2542 |
  |
2533 |
  |
2427 |
  |
2472 |
  |
2647 |
  |
2710 |
  |
Pb208 |
4779 |
  |
4735 |
  |
4643 |
  |
4719 |
  |
4914 |
  |
5148 |
  |
U238 |
11604 |
  |
12193 |
  |
12461 |
  |
12737 |
  |
13054 |
  |
14060 |
  |
ThO248 |
111875 |
  |
111931 |
  |
115155 |
  |
117586 |
  |
120692 |
  |
128030 |
  |
UO254 |
34279 |
  |
34222 |
  |
35276 |
  |
36168 |
  |
37127 |
  |
38799 |
  |
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 |
0.8 |
0.3 |
2.3 |
3.5 |
4.2 |
4.1 |
1.6 |
1.8 |
slope |
2.7 |
-0.0 |
-0.0 |
1.3 |
0.2 |
0.5 |
2.8 |
17.3 |
7.2 |
interc |
2.0E+4 |
2.6E+0 |
2.1E+0 |
1.1E+4 |
2.4E+3 |
4.6E+3 |
1.1E+4 |
1.1E+5 |
3.2E+4 |
cps |
1.1E+4 |
1.0E-1 |
1.1E-1 |
1.1E+3 |
8.5E+1 |
4.8E+2 |
2.5E+3 |
2.3E+4 |
1.8E+4 |
rej1 |
  |
  |
  |
11443 |
  |
  |
  |
128030 |
34279 |
rej2 |
  |
  |
  |
  |
  |
  |
  |
111875 |
  |
RATIOS
  |
204/206 |
207/206 |
208/206 |
196/238 |
206/238 |
248/238 |
254/238 |
error +- |
-0.000008 |
0.074900 |
0.423603 |
4.274009 |
0.453189 |
9.188594 |
7.023894 |
ratio |
-Inf |
0.001209 |
0.005637 |
0.034578 |
0.004226 |
0.068877 |
0.055433 |
CALIBRATION
CALIBRATION
Zr20/U=1.3034 Pb/U=0.2257 UO/U=6.9737 (Pb/U=0.00919(UO/U)^2)
REDUCED DATA
  |
rad cor |
+- |
age Ma |
+- |
  |
uncorrected |
  |
  |
  |
  |
  |
Pb206/U238 |
0.1793 |
0.0033 |
1062.9408 |
17.9 |
  |
Pb207/Pb206 |
0.0749 |
0.0012 |
1065.8310 |
32.1 |
  |
Pb207/U235 |
1.8513 |
0.0479 |
1063.8880 |
16.9 |
  |
Pb208/Th232 |
0.0523 |
0.0013 |
1030.2321 |
25.2 |
  |
204 corrected |
  |
  |
  |
  |
  |
Pb206/U238 |
0.1793 |
Inf |
1063.0595 |
Inf |
  |
Pb207/Pb206 |
0.0750 |
Inf |
1068.7124 |
NaN |
  |
Pb207/U235 |
1.8542 |
Inf |
1064.9131 |
Inf |
  |
Pb208/Pb206 |
0.4238 |
Inf |
  |
  |
  |
Pb208/Th232 |
0.0523 |
Inf |
1030.8722 |
Inf |
  |
207 corrected |
  |
  |
  |
  |
  |
Pb206/U238 |
0.1792 |
0.0033 |
1062.8268 |
18.0 |
  |
Pb208/Pb206 |
0.4234 |
0.0064 |
  |
  |
  |
Pb208/Th232 |
0.0523 |
0.0014 |
1029.6176 |
26.3 |
  |
208 corrected |
  |
  |
  |
  |
  |
Pb206/U238 |
0.1806 |
0.0034 |
1070.4897 |
18.5 |
  |
Pb207/Pb206 |
0.0817 |
0.0041 |
1237.9597 |
96.3 |
  |
Pb207/U235 |
2.0345 |
0.1144 |
1127.1307 |
37.6 |
  |
CONCENTRATIONS
CONCENTRATIONS
U:276.7 ppm Th:401.8 ppm Th/U:1.452 ±0.0 Pb204:-0.3 ppb sens 16.6


