SHRIMP II v2 SW v2.13 ACQUISITION DATA PRINTOUT
analyst GSWA, mount G14-21-1,
OGC-6.1, 2014-08-15, 03:57:06, 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=1860, z=2649
primary beam = -1.9nA
QT1 Y defl = -1706 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 |
195.82490 |
0.00000 |
2.0 |
8.0 |
12 |
YES 3.0 |
REF |
ALW |
COUNTER |
R 1.0E-12 |
2 |
Pb204 |
203.98290 |
0.00000 |
10.0 |
3.0 |
11 |
NO 10.0 |
NONE |
ALW |
COUNTER |
  |
3 |
Bkgrnd |
204.02790 |
0.00000 |
10.0 |
5.0 |
11 |
NO 0.5 |
BAC |
ALW |
COUNTER |
  |
4 |
Pb206 |
205.98818 |
0.00000 |
10.0 |
4.0 |
11 |
YES 6.0 |
REF |
ALW |
COUNTER |
R 1.0E-12 |
5 |
Pb207 |
206.99318 |
0.00000 |
30.0 |
2.0 |
11 |
NO 5.0 |
NONE |
ALW |
COUNTER |
FS+10mV=1Mcps=FIXED As |
6 |
Pb208 |
207.99618 |
0.00000 |
10.0 |
2.0 |
11 |
NO 4.0 |
NONE |
ALW |
COUNTER |
  |
7 |
U238 |
238.07412 |
0.00000 |
5.0 |
3.0 |
10 |
YES 3.0 |
REF |
ALW |
COUNTER |
  |
8 |
ThO248 |
248.05041 |
0.00000 |
5.0 |
3.0 |
9 |
YES 3.0 |
NONE |
ALW |
COUNTER |
  |
9 |
UO254 |
254.05631 |
0.00000 |
2.0 |
3.0 |
9 |
YES 2.0 |
REF |
ALW |
COUNTER |
  |
AMU-B calibration field offset -0.076 G.
DATA
Zr2O |
19063 |
  |
19731 |
  |
20716 |
  |
21236 |
  |
21687 |
  |
22177 |
  |
Pb204 |
2 |
  |
3 |
  |
2 |
  |
1 |
  |
0 |
  |
1 |
  |
Bkgrnd |
0 |
  |
0 |
  |
0 |
  |
0 |
  |
0 |
  |
0 |
  |
Pb206 |
27892 |
  |
27949 |
  |
27454 |
  |
26844 |
  |
26896 |
  |
26324 |
  |
Pb207 |
25283 |
  |
25143 |
R |
24481 |
R |
24157 |
  |
24225 |
  |
23775 |
  |
Pb208 |
3734 |
  |
3744 |
  |
3755 |
  |
3694 |
  |
3662 |
  |
3575 |
  |
U238 |
7331 |
  |
7564 |
  |
7726 |
  |
7864 |
  |
7937 |
  |
8103 |
  |
ThO248 |
25921 |
  |
25696 |
  |
25433 |
  |
25860 |
  |
26404 |
  |
26428 |
  |
UO254 |
21281 |
  |
21387 |
  |
21377 |
  |
21460 |
  |
21649 |
  |
21917 |
  |
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 |
1.8 |
0.2 |
0.0 |
1.5 |
1.4 |
0.4 |
0.3 |
3.9 |
0.4 |
slope |
4.1 |
-0.0 |
-0.0 |
-2.2 |
-2.0 |
-0.2 |
0.9 |
0.9 |
0.8 |
interc |
1.9E+4 |
2.7E+0 |
-0.0E+0 |
2.8E+4 |
2.5E+4 |
3.8E+3 |
7.3E+3 |
2.5E+4 |
2.1E+4 |
cps |
1.0E+4 |
1.4E-1 |
-0.0E+0 |
2.7E+3 |
8.2E+2 |
3.7E+2 |
1.5E+3 |
5.2E+3 |
1.1E+4 |
rej1 |
  |
  |
  |
  |
  |
  |
  |
  |
  |
rej2 |
  |
  |
  |
  |
  |
  |
  |
  |
  |
RATIOS
  |
204/206 |
207/206 |
208/206 |
196/238 |
206/238 |
248/238 |
254/238 |
error +- |
0.000051 |
0.300640 |
0.136014 |
6.811002 |
1.770194 |
3.364834 |
6.969573 |
ratio |
0.000017 |
0.001291 |
0.001001 |
0.040635 |
0.009782 |
0.023024 |
0.037688 |
CALIBRATION
CALIBRATION
Zr20/U=1.3034 Pb/U=0.2257 UO/U=6.9737 (Pb/U=0.03644(UO/U)^2)
REDUCED DATA
  |
rad cor |
+- |
age Ma |
+- |
  |
uncorrected |
  |
  |
  |
  |
  |
Pb206/U238 |
0.7112 |
0.0086 |
3462.8659 |
32.5 |
  |
Pb207/Pb206 |
0.3006 |
0.0013 |
3473.5230 |
6.6 |
  |
Pb207/U235 |
29.4796 |
0.3944 |
3469.6208 |
13.1 |
  |
Pb208/Th232 |
0.1808 |
0.0030 |
3359.0592 |
51.5 |
  |
204 corrected |
  |
  |
  |
  |
  |
Pb206/U238 |
0.7106 |
0.0086 |
3460.6609 |
32.4 |
  |
Pb207/Pb206 |
0.3001 |
0.0013 |
3470.7153 |
6.8 |
  |
Pb207/U235 |
29.4019 |
0.3948 |
3467.0321 |
13.1 |
  |
Pb208/Pb206 |
0.1343 |
0.0012 |
  |
  |
  |
Pb208/Th232 |
0.1784 |
0.0031 |
3317.2902 |
52.9 |
  |
207 corrected |
  |
  |
  |
  |
  |
Pb206/U238 |
0.7085 |
0.0087 |
3452.8241 |
32.8 |
  |
Pb208/Pb206 |
0.1281 |
0.0045 |
  |
  |
  |
Pb208/Th232 |
0.1697 |
0.0065 |
3168.2571 |
111.2 |
  |
208 corrected |
  |
  |
  |
  |
  |
Pb206/U238 |
0.7127 |
0.0087 |
3468.7325 |
32.6 |
  |
Pb207/Pb206 |
0.3021 |
0.0015 |
3480.9476 |
7.7 |
  |
Pb207/U235 |
29.6862 |
0.4069 |
3476.4804 |
13.4 |
  |
CONCENTRATIONS
CONCENTRATIONS
U:172.7 ppm Th:92.4 ppm Th/U:0.535 ±0.0 Pb204:5.4 ppb sens 16.9


