SHRIMP II v2 SW v2.13 ACQUISITION DATA PRINTOUT
analyst GSWA, mount G14-21-1,
702-13.1, 2014-08-15, 08:22:00, 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=2171, z=2929
primary beam = -2.0nA
QT1 Y defl = -1724 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 |
195.82368 |
0.00000 |
2.0 |
8.0 |
12 |
YES 3.0 |
REF |
ALW |
COUNTER |
R 1.0E-12 |
2 |
Pb204 |
203.98168 |
0.00000 |
10.0 |
3.0 |
11 |
NO 10.0 |
NONE |
ALW |
COUNTER |
  |
3 |
Bkgrnd |
204.02668 |
0.00000 |
10.0 |
5.0 |
11 |
NO 0.5 |
BAC |
ALW |
COUNTER |
  |
4 |
Pb206 |
205.98809 |
0.00000 |
10.0 |
4.0 |
11 |
YES 6.0 |
REF |
ALW |
COUNTER |
R 1.0E-12 |
5 |
Pb207 |
206.99309 |
0.00000 |
30.0 |
2.0 |
11 |
NO 5.0 |
NONE |
ALW |
COUNTER |
FS+10mV=1Mcps=FIXED As |
6 |
Pb208 |
207.99609 |
0.00000 |
10.0 |
2.0 |
11 |
NO 4.0 |
NONE |
ALW |
COUNTER |
  |
7 |
U238 |
238.07323 |
0.00000 |
5.0 |
3.0 |
10 |
YES 3.0 |
REF |
ALW |
COUNTER |
  |
8 |
ThO248 |
248.04961 |
0.00000 |
5.0 |
3.0 |
9 |
YES 3.0 |
NONE |
ALW |
COUNTER |
  |
9 |
UO254 |
254.05686 |
0.00000 |
2.0 |
3.0 |
9 |
YES 2.0 |
REF |
ALW |
COUNTER |
  |
AMU-B calibration field offset -0.076 G.
DATA
Zr2O |
19985 |
  |
20568 |
  |
21710 |
  |
22161 |
  |
22254 |
  |
22547 |
  |
Pb204 |
3 |
  |
0 |
  |
1 |
  |
0 |
  |
1 |
  |
1 |
  |
Bkgrnd |
0 |
  |
0 |
  |
0 |
  |
1 |
  |
1 |
  |
1 |
  |
Pb206 |
1304 |
  |
1252 |
  |
1171 |
  |
1141 |
  |
1117 |
  |
1024 |
  |
Pb207 |
287 |
  |
278 |
R |
247 |
  |
248 |
  |
232 |
  |
281 |
R |
Pb208 |
394 |
  |
382 |
  |
385 |
  |
285 |
  |
276 |
  |
312 |
  |
U238 |
1361 |
  |
1336 |
  |
1293 |
  |
1317 |
  |
1237 |
  |
1311 |
  |
ThO248 |
8849 |
  |
8343 |
  |
8097 |
  |
7819 |
  |
7445 |
  |
7420 |
  |
UO254 |
3847 |
  |
3616 |
  |
3580 |
  |
3521 |
  |
3412 |
  |
3484 |
  |
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 |
4.2 |
0.3 |
0.0 |
0.3 |
2.1 |
3.9 |
1.0 |
2.0 |
1.7 |
slope |
3.5 |
-0.0 |
0.0 |
-0.3 |
-0.0 |
-0.2 |
-0.1 |
-1.9 |
-0.5 |
interc |
2.0E+4 |
1.6E+0 |
-2.2E-1 |
1.3E+3 |
2.8E+2 |
4.2E+2 |
1.4E+3 |
9.0E+3 |
3.8E+3 |
cps |
1.1E+4 |
9.5E-2 |
5.3E-2 |
1.2E+2 |
8.8E+0 |
3.5E+1 |
2.6E+2 |
1.6E+3 |
1.8E+3 |
rej1 |
21710 |
  |
  |
  |
  |
  |
  |
  |
  |
rej2 |
  |
  |
  |
  |
  |
  |
  |
  |
  |
RATIOS
  |
204/206 |
207/206 |
208/206 |
196/238 |
206/238 |
248/238 |
254/238 |
error +- |
0.000354 |
0.074553 |
0.296063 |
41.076566 |
0.444249 |
6.192013 |
6.877545 |
ratio |
0.000354 |
0.002859 |
0.013429 |
0.519489 |
0.007304 |
0.080439 |
0.099235 |
CALIBRATION
CALIBRATION
Zr20/U=1.3034 Pb/U=0.2257 UO/U=6.9737 (Pb/U=0.00939(UO/U)^2)
REDUCED DATA
  |
rad cor |
+- |
age Ma |
+- |
  |
uncorrected |
  |
  |
  |
  |
  |
Pb206/U238 |
0.1833 |
0.0061 |
1084.8904 |
33.1 |
  |
Pb207/Pb206 |
0.0746 |
0.0029 |
1056.4790 |
75.3 |
  |
Pb207/U235 |
1.8840 |
0.1013 |
1075.4880 |
35.1 |
  |
Pb208/Th232 |
0.0545 |
0.0032 |
1073.4435 |
62.1 |
  |
204 corrected |
  |
  |
  |
  |
  |
Pb206/U238 |
0.1822 |
0.0061 |
1079.2268 |
33.4 |
  |
Pb207/Pb206 |
0.0695 |
0.0062 |
913.4442 |
173.1 |
  |
Pb207/U235 |
1.7462 |
0.1729 |
1025.7746 |
62.0 |
  |
Pb208/Pb206 |
0.2850 |
0.0186 |
  |
  |
  |
Pb208/Th232 |
0.0522 |
0.0040 |
1028.7800 |
76.1 |
  |
207 corrected |
  |
  |
  |
  |
  |
Pb206/U238 |
0.1835 |
0.0061 |
1085.8461 |
33.3 |
  |
Pb208/Pb206 |
0.2979 |
0.0152 |
  |
  |
  |
Pb208/Th232 |
0.0549 |
0.0035 |
1080.9746 |
67.4 |
  |
208 corrected |
  |
  |
  |
  |
  |
Pb206/U238 |
0.1836 |
0.0063 |
1086.5685 |
34.0 |
  |
Pb207/Pb206 |
0.0760 |
0.0079 |
1096.1746 |
193.9 |
  |
Pb207/U235 |
1.9249 |
0.2169 |
1089.7705 |
72.6 |
  |
CONCENTRATIONS
CONCENTRATIONS
U:28.4 ppm Th:28.2 ppm Th/U:0.995 ±0.0 Pb204:1.6 ppb sens 16.5


