SHRIMP II v2 SW v2.13 ACQUISITION DATA PRINTOUT
analyst GSWA, mount G14-21-1,
OGC-1.1, 2014-08-14, 10:49:09, 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=7980, y=1794, z=2819
primary beam = -1.8nA
QT1 Y defl = -1688 bits; QT1 Z defl = 272 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 |
195.81859 |
0.00000 |
2.0 |
8.0 |
12 |
YES 3.0 |
REF |
ALW |
COUNTER |
R 1.0E-12 |
2 |
Pb204 |
203.97659 |
0.00000 |
10.0 |
3.0 |
11 |
NO 10.0 |
NONE |
ALW |
COUNTER |
  |
3 |
Bkgrnd |
204.02159 |
0.00000 |
10.0 |
5.0 |
11 |
NO 0.5 |
BAC |
ALW |
COUNTER |
  |
4 |
Pb206 |
205.98171 |
0.00000 |
10.0 |
4.0 |
11 |
YES 6.0 |
REF |
ALW |
COUNTER |
R 1.0E-12 |
5 |
Pb207 |
206.98671 |
0.00000 |
30.0 |
2.0 |
11 |
NO 5.0 |
NONE |
ALW |
COUNTER |
FS+10mV=1Mcps=FIXED As |
6 |
Pb208 |
207.98971 |
0.00000 |
10.0 |
2.0 |
11 |
NO 4.0 |
NONE |
ALW |
COUNTER |
  |
7 |
U238 |
238.06697 |
0.00000 |
5.0 |
3.0 |
10 |
YES 3.0 |
REF |
ALW |
COUNTER |
  |
8 |
ThO248 |
248.04305 |
0.00000 |
5.0 |
3.0 |
9 |
YES 3.0 |
NONE |
ALW |
COUNTER |
  |
9 |
UO254 |
254.04886 |
0.00000 |
2.0 |
3.0 |
9 |
YES 2.0 |
REF |
ALW |
COUNTER |
  |
AMU-B calibration field offset -0.076 G.
DATA
Zr2O |
18798 |
  |
19264 |
  |
19784 |
  |
20203 |
  |
20481 |
  |
21147 |
R |
Pb204 |
1 |
  |
0 |
  |
5 |
  |
1 |
  |
5 |
  |
1 |
  |
Bkgrnd |
2 |
  |
1 |
  |
0 |
  |
1 |
  |
0 |
  |
1 |
  |
Pb206 |
22382 |
  |
22095 |
  |
21567 |
  |
21498 |
  |
20940 |
  |
21230 |
  |
Pb207 |
20247 |
  |
19818 |
  |
19390 |
  |
19435 |
  |
18925 |
  |
18946 |
  |
Pb208 |
5366 |
  |
5277 |
  |
5142 |
  |
5151 |
  |
4894 |
  |
4956 |
  |
U238 |
6275 |
  |
6325 |
  |
6478 |
  |
6669 |
  |
6603 |
  |
6641 |
  |
ThO248 |
37906 |
  |
37799 |
  |
37924 |
  |
37895 |
  |
38241 |
  |
37798 |
  |
UO254 |
17664 |
  |
17774 |
  |
17861 |
  |
17985 |
  |
18079 |
  |
17883 |
  |
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 |
0.4 |
2.2 |
0.2 |
2.4 |
1.4 |
0.9 |
0.9 |
0.8 |
0.6 |
slope |
2.9 |
0.0 |
-0.0 |
-1.7 |
-1.7 |
-0.6 |
0.5 |
0.1 |
0.4 |
interc |
1.9E+4 |
1.3E+0 |
1.4E+0 |
2.2E+4 |
2.0E+4 |
5.4E+3 |
6.2E+3 |
3.8E+4 |
1.8E+4 |
cps |
1.0E+4 |
2.2E-1 |
8.1E-2 |
2.2E+3 |
6.5E+2 |
5.2E+2 |
1.3E+3 |
7.6E+3 |
8.9E+3 |
rej1 |
  |
  |
  |
  |
  |
  |
  |
  |
  |
rej2 |
  |
  |
  |
  |
  |
  |
  |
  |
  |
RATIOS
  |
204/206 |
207/206 |
208/206 |
196/238 |
206/238 |
248/238 |
254/238 |
error +- |
0.000066 |
0.300634 |
0.238598 |
7.767274 |
1.672707 |
5.866206 |
6.899750 |
ratio |
0.000048 |
0.001670 |
0.001706 |
0.045300 |
0.011128 |
0.032158 |
0.040809 |
CALIBRATION
CALIBRATION
Zr20/U=1.3034 Pb/U=0.2257 UO/U=6.9737 (Pb/U=0.03514(UO/U)^2)
REDUCED DATA
  |
rad cor |
+- |
age Ma |
+- |
  |
uncorrected |
  |
  |
  |
  |
  |
Pb206/U238 |
0.6857 |
0.0093 |
3366.0944 |
35.5 |
  |
Pb207/Pb206 |
0.3006 |
0.0017 |
3473.4932 |
8.6 |
  |
Pb207/U235 |
28.4222 |
0.4347 |
3433.7695 |
14.9 |
  |
Pb208/Th232 |
0.1740 |
0.0030 |
3242.7057 |
51.9 |
  |
204 corrected |
  |
  |
  |
  |
  |
Pb206/U238 |
0.6849 |
0.0093 |
3363.3159 |
35.5 |
  |
Pb207/Pb206 |
0.2999 |
0.0018 |
3469.8767 |
9.5 |
  |
Pb207/U235 |
28.3258 |
0.4417 |
3430.4397 |
15.2 |
  |
Pb208/Pb206 |
0.2365 |
0.0024 |
  |
  |
  |
Pb208/Th232 |
0.1723 |
0.0032 |
3213.0398 |
55.8 |
  |
207 corrected |
  |
  |
  |
  |
  |
Pb206/U238 |
0.6650 |
0.0092 |
3286.5050 |
35.4 |
  |
Pb208/Pb206 |
0.1767 |
0.0059 |
  |
  |
  |
Pb208/Th232 |
0.1250 |
0.0046 |
2380.4663 |
83.1 |
  |
208 corrected |
  |
  |
  |
  |
  |
Pb206/U238 |
0.6891 |
0.0094 |
3379.1345 |
35.8 |
  |
Pb207/Pb206 |
0.3039 |
0.0021 |
3490.2618 |
10.8 |
  |
Pb207/U235 |
28.8748 |
0.4651 |
3449.2719 |
15.7 |
  |
CONCENTRATIONS
CONCENTRATIONS
U:150.5 ppm Th:141.5 ppm Th/U:0.940 ±0.0 Pb204:5.9 ppb sens 16.2


