SHRIMP II v2 SW v2.13 ACQUISITION DATA PRINTOUT
analyst GSWA, mount G14-21-1,
506-17.1, 2014-08-14, 22:18:34, 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=7986, y=1213, z=3231
primary beam = -1.9nA
QT1 Y defl = -1720 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 |
195.82550 |
0.00000 |
2.0 |
8.0 |
12 |
YES 3.0 |
REF |
ALW |
COUNTER |
R 1.0E-12 |
2 |
Pb204 |
203.98350 |
0.00000 |
10.0 |
3.0 |
11 |
NO 10.0 |
NONE |
ALW |
COUNTER |
  |
3 |
Bkgrnd |
204.02850 |
0.00000 |
10.0 |
5.0 |
11 |
NO 0.5 |
BAC |
ALW |
COUNTER |
  |
4 |
Pb206 |
205.98919 |
0.00000 |
10.0 |
4.0 |
11 |
YES 6.0 |
REF |
ALW |
COUNTER |
R 1.0E-12 |
5 |
Pb207 |
206.99420 |
0.00000 |
30.0 |
2.0 |
11 |
NO 5.0 |
NONE |
ALW |
COUNTER |
FS+10mV=1Mcps=FIXED As |
6 |
Pb208 |
207.99720 |
0.00000 |
10.0 |
2.0 |
11 |
NO 4.0 |
NONE |
ALW |
COUNTER |
  |
7 |
U238 |
238.07411 |
0.00000 |
5.0 |
3.0 |
10 |
YES 3.0 |
REF |
ALW |
COUNTER |
  |
8 |
ThO248 |
248.05159 |
0.00000 |
5.0 |
3.0 |
9 |
YES 3.0 |
NONE |
ALW |
COUNTER |
  |
9 |
UO254 |
254.05827 |
0.00000 |
2.0 |
3.0 |
9 |
YES 2.0 |
REF |
ALW |
COUNTER |
  |
AMU-B calibration field offset -0.076 G.
DATA
Zr2O |
18867 |
  |
19300 |
  |
19917 |
  |
19956 |
  |
20538 |
  |
20861 |
  |
Pb204 |
2 |
  |
2 |
  |
1 |
  |
1 |
  |
1 |
  |
1 |
  |
Bkgrnd |
2 |
  |
1 |
  |
0 |
  |
1 |
  |
1 |
  |
1 |
  |
Pb206 |
4938 |
  |
4938 |
  |
4858 |
  |
4783 |
  |
4859 |
  |
4720 |
  |
Pb207 |
1271 |
  |
1164 |
  |
1146 |
R |
1169 |
  |
1133 |
  |
1138 |
  |
Pb208 |
1141 |
  |
1086 |
  |
1092 |
  |
1053 |
  |
1142 |
  |
1066 |
  |
U238 |
4588 |
  |
4629 |
  |
4767 |
  |
4842 |
  |
4872 |
  |
4962 |
  |
ThO248 |
23931 |
  |
23627 |
  |
23623 |
  |
23657 |
  |
23538 |
  |
24257 |
  |
UO254 |
13572 |
  |
13297 |
R |
13213 |
  |
13470 |
  |
13399 |
  |
13291 |
  |
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 |
0.9 |
0.1 |
0.1 |
0.5 |
1.1 |
1.4 |
0.2 |
3.6 |
1.5 |
slope |
2.6 |
-0.0 |
-0.0 |
-0.3 |
-0.1 |
-0.0 |
0.5 |
0.3 |
-0.2 |
interc |
1.9E+4 |
2.0E+0 |
1.3E+0 |
5.0E+3 |
1.2E+3 |
1.1E+3 |
4.5E+3 |
2.4E+4 |
1.3E+4 |
cps |
1.0E+4 |
1.3E-1 |
9.9E-2 |
4.9E+2 |
3.9E+1 |
1.1E+2 |
9.5E+2 |
4.8E+3 |
6.7E+3 |
rej1 |
  |
  |
  |
  |
  |
  |
  |
  |
  |
rej2 |
  |
  |
  |
  |
  |
  |
  |
  |
  |
RATIOS
  |
204/206 |
207/206 |
208/206 |
196/238 |
206/238 |
248/238 |
254/238 |
error +- |
0.000061 |
0.080478 |
0.226416 |
10.552932 |
0.511117 |
5.006968 |
7.055580 |
ratio |
0.000114 |
0.001131 |
0.003544 |
0.069431 |
0.004255 |
0.038816 |
0.051378 |
CALIBRATION
CALIBRATION
Zr20/U=1.3034 Pb/U=0.2257 UO/U=6.9737 (Pb/U=0.01027(UO/U)^2)
REDUCED DATA
  |
rad cor |
+- |
age Ma |
+- |
  |
uncorrected |
  |
  |
  |
  |
  |
Pb206/U238 |
0.2004 |
0.0034 |
1177.2744 |
18.0 |
  |
Pb207/Pb206 |
0.0805 |
0.0011 |
1208.7328 |
27.4 |
  |
Pb207/U235 |
2.2233 |
0.0516 |
1188.4118 |
16.1 |
  |
Pb208/Th232 |
0.0575 |
0.0015 |
1130.6515 |
27.8 |
  |
204 corrected |
  |
  |
  |
  |
  |
Pb206/U238 |
0.2002 |
0.0034 |
1176.2271 |
18.1 |
  |
Pb207/Pb206 |
0.0796 |
0.0021 |
1187.5837 |
51.0 |
  |
Pb207/U235 |
2.1974 |
0.0724 |
1180.2330 |
22.7 |
  |
Pb208/Pb206 |
0.2245 |
0.0054 |
  |
  |
  |
Pb208/Th232 |
0.0570 |
0.0018 |
1120.1158 |
34.1 |
  |
207 corrected |
  |
  |
  |
  |
  |
Pb206/U238 |
0.2001 |
0.0034 |
1175.6715 |
18.1 |
  |
Pb208/Pb206 |
0.2234 |
0.0046 |
  |
  |
  |
Pb208/Th232 |
0.0567 |
0.0016 |
1114.5242 |
30.9 |
  |
208 corrected |
  |
  |
  |
  |
  |
Pb206/U238 |
0.2013 |
0.0034 |
1182.4628 |
18.2 |
  |
Pb207/Pb206 |
0.0847 |
0.0024 |
1308.8866 |
53.7 |
  |
Pb207/U235 |
2.3515 |
0.0814 |
1228.0046 |
24.4 |
  |
CONCENTRATIONS
CONCENTRATIONS
U:112.4 ppm Th:88.6 ppm Th/U:0.789 ±0.0 Pb204:1.2 ppb sens 16.5


