SHRIMP II v2 SW v2.13 ACQUISITION DATA PRINTOUT
analyst GSWA, mount G14-21-1,
702-14.1, 2014-08-15, 08:41:24, 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=2237, z=2893
primary beam = -2.1nA
QT1 Y defl = -1712 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 |
195.82476 |
0.00000 |
2.0 |
8.0 |
12 |
YES 3.0 |
REF |
ALW |
COUNTER |
R 1.0E-12 |
2 |
Pb204 |
203.98276 |
0.00000 |
10.0 |
3.0 |
11 |
NO 10.0 |
NONE |
ALW |
COUNTER |
  |
3 |
Bkgrnd |
204.02776 |
0.00000 |
10.0 |
5.0 |
11 |
NO 0.5 |
BAC |
ALW |
COUNTER |
  |
4 |
Pb206 |
205.98769 |
0.00000 |
10.0 |
4.0 |
11 |
YES 6.0 |
REF |
ALW |
COUNTER |
R 1.0E-12 |
5 |
Pb207 |
206.99269 |
0.00000 |
30.0 |
2.0 |
11 |
NO 5.0 |
NONE |
ALW |
COUNTER |
FS+10mV=1Mcps=FIXED As |
6 |
Pb208 |
207.99569 |
0.00000 |
10.0 |
2.0 |
11 |
NO 4.0 |
NONE |
ALW |
COUNTER |
  |
7 |
U238 |
238.07361 |
0.00000 |
5.0 |
3.0 |
10 |
YES 3.0 |
REF |
ALW |
COUNTER |
  |
8 |
ThO248 |
248.05042 |
0.00000 |
5.0 |
3.0 |
9 |
YES 3.0 |
NONE |
ALW |
COUNTER |
  |
9 |
UO254 |
254.05673 |
0.00000 |
2.0 |
3.0 |
9 |
YES 2.0 |
REF |
ALW |
COUNTER |
  |
AMU-B calibration field offset -0.076 G.
DATA
Zr2O |
20240 |
  |
20339 |
  |
21293 |
  |
21770 |
  |
22113 |
  |
22254 |
  |
Pb204 |
1 |
  |
3 |
  |
1 |
  |
2 |
  |
0 |
  |
1 |
  |
Bkgrnd |
0 |
  |
1 |
  |
3 |
  |
0 |
  |
0 |
  |
0 |
  |
Pb206 |
2110 |
  |
1982 |
  |
1918 |
  |
1930 |
  |
1821 |
  |
1920 |
  |
Pb207 |
462 |
  |
468 |
  |
442 |
  |
419 |
  |
435 |
  |
420 |
  |
Pb208 |
766 |
  |
696 |
  |
664 |
  |
697 |
  |
690 |
  |
694 |
  |
U238 |
2125 |
  |
2256 |
  |
2219 |
  |
2276 |
  |
2373 |
  |
2161 |
  |
ThO248 |
17231 |
  |
17290 |
  |
16713 |
  |
17250 |
R |
17148 |
  |
16809 |
  |
UO254 |
6311 |
  |
6173 |
  |
6108 |
  |
6111 |
  |
6300 |
  |
6295 |
  |
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 |
2.8 |
0.5 |
0.4 |
2.2 |
0.3 |
1.5 |
3.8 |
3.7 |
1.8 |
slope |
2.9 |
-0.0 |
-0.0 |
-0.3 |
-0.1 |
-0.1 |
0.1 |
-0.4 |
0.1 |
interc |
2.0E+4 |
2.0E+0 |
1.1E+0 |
2.1E+3 |
4.7E+2 |
7.3E+2 |
2.2E+3 |
1.7E+4 |
6.2E+3 |
cps |
1.1E+4 |
1.3E-1 |
6.4E-2 |
1.9E+2 |
1.5E+1 |
7.0E+1 |
4.5E+2 |
3.4E+3 |
3.1E+3 |
rej1 |
  |
  |
  |
  |
  |
  |
  |
  |
  |
rej2 |
  |
  |
  |
  |
  |
  |
  |
  |
  |
RATIOS
  |
204/206 |
207/206 |
208/206 |
196/238 |
206/238 |
248/238 |
254/238 |
error +- |
0.000326 |
0.075445 |
0.361414 |
24.097140 |
0.437018 |
7.677842 |
6.970871 |
ratio |
0.000283 |
0.001793 |
0.008330 |
0.420985 |
0.009457 |
0.137287 |
0.127140 |
CALIBRATION
CALIBRATION
Zr20/U=1.3034 Pb/U=0.2257 UO/U=6.9737 (Pb/U=0.00899(UO/U)^2)
REDUCED DATA
  |
rad cor |
+- |
age Ma |
+- |
  |
uncorrected |
  |
  |
  |
  |
  |
Pb206/U238 |
0.1755 |
0.0074 |
1042.3713 |
40.7 |
  |
Pb207/Pb206 |
0.0754 |
0.0018 |
1080.3758 |
46.9 |
  |
Pb207/U235 |
1.8257 |
0.0934 |
1054.7212 |
33.0 |
  |
Pb208/Th232 |
0.0520 |
0.0028 |
1023.9639 |
54.5 |
  |
204 corrected |
  |
  |
  |
  |
  |
Pb206/U238 |
0.1746 |
0.0074 |
1037.3423 |
40.7 |
  |
Pb207/Pb206 |
0.0708 |
0.0047 |
951.3845 |
130.9 |
  |
Pb207/U235 |
1.7041 |
0.1425 |
1010.0709 |
52.1 |
  |
Pb208/Pb206 |
0.3516 |
0.0132 |
  |
  |
  |
Pb208/Th232 |
0.0503 |
0.0031 |
991.7822 |
60.3 |
  |
207 corrected |
  |
  |
  |
  |
  |
Pb206/U238 |
0.1752 |
0.0074 |
1040.6413 |
40.7 |
  |
Pb208/Pb206 |
0.3581 |
0.0095 |
  |
  |
  |
Pb208/Th232 |
0.0514 |
0.0029 |
1012.8961 |
55.5 |
  |
208 corrected |
  |
  |
  |
  |
  |
Pb206/U238 |
0.1761 |
0.0076 |
1045.8189 |
41.3 |
  |
Pb207/Pb206 |
0.0786 |
0.0067 |
1162.3149 |
161.3 |
  |
Pb207/U235 |
1.9091 |
0.1921 |
1084.2542 |
64.9 |
  |
CONCENTRATIONS
CONCENTRATIONS
U:48.8 ppm Th:59.6 ppm Th/U:1.221 ±0.0 Pb204:2.4 ppb sens 16.1


