SHRIMP II v2 SW v2.13 ACQUISITION DATA PRINTOUT
analyst GSWA, mount G14-21-1,
506-14.1, 2014-08-14, 17:37:11, 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=7981, y=1422, z=2938
primary beam = -1.8nA
QT1 Y defl = -1710 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 |
195.81979 |
0.00000 |
2.0 |
8.0 |
12 |
YES 3.0 |
REF |
ALW |
COUNTER |
R 1.0E-12 |
2 |
Pb204 |
203.97779 |
0.00000 |
10.0 |
3.0 |
11 |
NO 10.0 |
NONE |
ALW |
COUNTER |
  |
3 |
Bkgrnd |
204.02279 |
0.00000 |
10.0 |
5.0 |
11 |
NO 0.5 |
BAC |
ALW |
COUNTER |
  |
4 |
Pb206 |
205.98403 |
0.00000 |
10.0 |
4.0 |
11 |
YES 6.0 |
REF |
ALW |
COUNTER |
R 1.0E-12 |
5 |
Pb207 |
206.98904 |
0.00000 |
30.0 |
2.0 |
11 |
NO 5.0 |
NONE |
ALW |
COUNTER |
FS+10mV=1Mcps=FIXED As |
6 |
Pb208 |
207.99204 |
0.00000 |
10.0 |
2.0 |
11 |
NO 4.0 |
NONE |
ALW |
COUNTER |
  |
7 |
U238 |
238.06945 |
0.00000 |
5.0 |
3.0 |
10 |
YES 3.0 |
REF |
ALW |
COUNTER |
  |
8 |
ThO248 |
248.04599 |
0.00000 |
5.0 |
3.0 |
9 |
YES 3.0 |
NONE |
ALW |
COUNTER |
  |
9 |
UO254 |
254.05130 |
0.00000 |
2.0 |
3.0 |
9 |
YES 2.0 |
REF |
ALW |
COUNTER |
  |
AMU-B calibration field offset -0.076 G.
DATA
Zr2O |
18018 |
  |
18813 |
  |
19323 |
  |
20037 |
  |
20653 |
R |
20290 |
  |
Pb204 |
3 |
  |
1 |
  |
0 |
  |
2 |
  |
4 |
  |
0 |
  |
Bkgrnd |
2 |
  |
2 |
  |
0 |
  |
0 |
  |
1 |
  |
0 |
  |
Pb206 |
946 |
  |
997 |
  |
1038 |
  |
987 |
  |
923 |
  |
908 |
  |
Pb207 |
283 |
  |
252 |
  |
259 |
  |
241 |
  |
253 |
  |
235 |
  |
Pb208 |
333 |
  |
312 |
  |
305 |
  |
324 |
  |
289 |
  |
304 |
  |
U238 |
954 |
  |
977 |
  |
1118 |
  |
1072 |
  |
1031 |
  |
1094 |
  |
ThO248 |
6802 |
  |
6740 |
  |
6816 |
  |
6957 |
  |
6954 |
  |
7188 |
R |
UO254 |
2852 |
  |
2907 |
  |
2932 |
  |
2944 |
  |
2950 |
R |
2939 |
  |
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 |
0.3 |
0.7 |
0.2 |
2.3 |
0.5 |
0.5 |
2.8 |
0.9 |
0.2 |
slope |
4.2 |
-0.0 |
-0.0 |
-0.1 |
-0.0 |
-0.0 |
0.2 |
0.5 |
0.1 |
interc |
1.8E+4 |
2.0E+0 |
1.9E+0 |
1.0E+3 |
2.8E+2 |
3.3E+2 |
9.6E+2 |
6.6E+3 |
2.9E+3 |
cps |
9.9E+3 |
1.6E-1 |
7.9E-2 |
9.7E+1 |
8.5E+0 |
3.1E+1 |
2.1E+2 |
1.4E+3 |
1.5E+3 |
rej1 |
20290 |
  |
  |
  |
  |
  |
  |
  |
  |
rej2 |
  |
  |
  |
  |
  |
  |
  |
  |
  |
RATIOS
  |
204/206 |
207/206 |
208/206 |
196/238 |
206/238 |
248/238 |
254/238 |
error +- |
0.000885 |
0.087202 |
0.323151 |
48.239258 |
0.468597 |
6.664658 |
7.060415 |
ratio |
0.000685 |
0.002843 |
0.009907 |
1.027167 |
0.013621 |
0.144331 |
0.158187 |
CALIBRATION
CALIBRATION
Zr20/U=1.3034 Pb/U=0.2257 UO/U=6.9737 (Pb/U=0.00940(UO/U)^2)
REDUCED DATA
  |
rad cor |
+- |
age Ma |
+- |
  |
uncorrected |
  |
  |
  |
  |
  |
Pb206/U238 |
0.1834 |
0.0098 |
1085.7631 |
53.2 |
  |
Pb207/Pb206 |
0.0872 |
0.0028 |
1364.9580 |
61.5 |
  |
Pb207/U235 |
2.2056 |
0.1455 |
1182.8254 |
45.1 |
  |
Pb208/Th232 |
0.0565 |
0.0039 |
1111.0971 |
74.5 |
  |
204 corrected |
  |
  |
  |
  |
  |
Pb206/U238 |
0.1808 |
0.0099 |
1071.6053 |
53.6 |
  |
Pb207/Pb206 |
0.0746 |
0.0110 |
1058.9868 |
271.8 |
  |
Pb207/U235 |
1.8613 |
0.3048 |
1067.4560 |
102.8 |
  |
Pb208/Pb206 |
0.2958 |
0.0270 |
  |
  |
  |
Pb208/Th232 |
0.0510 |
0.0056 |
1005.3041 |
108.2 |
  |
207 corrected |
  |
  |
  |
  |
  |
Pb206/U238 |
0.1809 |
0.0097 |
1072.1285 |
52.6 |
  |
Pb208/Pb206 |
0.2968 |
0.0124 |
  |
  |
  |
Pb208/Th232 |
0.0512 |
0.0038 |
1009.2191 |
73.4 |
  |
208 corrected |
  |
  |
  |
  |
  |
Pb206/U238 |
0.1827 |
0.0099 |
1081.8087 |
53.5 |
  |
Pb207/Pb206 |
0.0837 |
0.0076 |
1286.2413 |
167.4 |
  |
Pb207/U235 |
2.1094 |
0.2348 |
1151.8739 |
73.9 |
  |
CONCENTRATIONS
CONCENTRATIONS
U:24.6 ppm Th:25.8 ppm Th/U:1.049 ±0.0 Pb204:3.4 ppb sens 17.3


