SHRIMP II v2 SW v2.13 ACQUISITION DATA PRINTOUT
analyst GSWA, mount G14-21-1,
OGC-2.1, 2014-08-14, 15:15:51, 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=1798, z=2770
primary beam = -1.8nA
QT1 Y defl = -1689 bits; QT1 Z defl = 385 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 |
195.81830 |
0.00000 |
2.0 |
8.0 |
12 |
YES 3.0 |
REF |
ALW |
COUNTER |
R 1.0E-12 |
2 |
Pb204 |
203.97629 |
0.00000 |
10.0 |
3.0 |
11 |
NO 10.0 |
NONE |
ALW |
COUNTER |
  |
3 |
Bkgrnd |
204.02129 |
0.00000 |
10.0 |
5.0 |
11 |
NO 0.5 |
BAC |
ALW |
COUNTER |
  |
4 |
Pb206 |
205.98239 |
0.00000 |
10.0 |
4.0 |
11 |
YES 6.0 |
REF |
ALW |
COUNTER |
R 1.0E-12 |
5 |
Pb207 |
206.98739 |
0.00000 |
30.0 |
2.0 |
11 |
NO 5.0 |
NONE |
ALW |
COUNTER |
FS+10mV=1Mcps=FIXED As |
6 |
Pb208 |
207.99039 |
0.00000 |
10.0 |
2.0 |
11 |
NO 4.0 |
NONE |
ALW |
COUNTER |
  |
7 |
U238 |
238.06644 |
0.00000 |
5.0 |
3.0 |
10 |
YES 3.0 |
REF |
ALW |
COUNTER |
  |
8 |
ThO248 |
248.04329 |
0.00000 |
5.0 |
3.0 |
9 |
YES 3.0 |
NONE |
ALW |
COUNTER |
  |
9 |
UO254 |
254.05049 |
0.00000 |
2.0 |
3.0 |
9 |
YES 2.0 |
REF |
ALW |
COUNTER |
  |
AMU-B calibration field offset -0.076 G.
DATA
Zr2O |
18809 |
  |
19019 |
  |
19300 |
  |
19818 |
  |
20555 |
  |
20874 |
  |
Pb204 |
3 |
  |
2 |
  |
2 |
  |
1 |
  |
2 |
  |
0 |
  |
Bkgrnd |
1 |
  |
1 |
  |
4 |
  |
0 |
  |
1 |
  |
0 |
  |
Pb206 |
40107 |
  |
39888 |
  |
39203 |
  |
38565 |
  |
38403 |
  |
37832 |
  |
Pb207 |
36326 |
  |
36126 |
  |
35144 |
  |
34769 |
  |
34218 |
  |
34098 |
  |
Pb208 |
13082 |
  |
12957 |
  |
12670 |
  |
12765 |
  |
12473 |
  |
12328 |
  |
U238 |
10446 |
  |
10808 |
  |
11128 |
  |
11467 |
  |
11609 |
  |
11911 |
  |
ThO248 |
90038 |
  |
90121 |
  |
90102 |
  |
91265 |
  |
90939 |
  |
92088 |
  |
UO254 |
31194 |
  |
31106 |
  |
30990 |
  |
31051 |
  |
31165 |
  |
31669 |
  |
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 |
1.6 |
0.2 |
0.7 |
0.6 |
1.5 |
0.6 |
0.4 |
1.8 |
1.6 |
slope |
2.9 |
-0.0 |
-0.0 |
-3.1 |
-3.2 |
-1.0 |
1.9 |
2.6 |
0.5 |
interc |
1.9E+4 |
2.9E+0 |
1.9E+0 |
4.0E+4 |
3.7E+4 |
1.3E+4 |
1.0E+4 |
8.9E+4 |
3.1E+4 |
cps |
9.9E+3 |
1.6E-1 |
1.1E-1 |
3.9E+3 |
1.2E+3 |
1.3E+3 |
2.2E+3 |
1.8E+4 |
1.6E+4 |
rej1 |
  |
  |
  |
  |
  |
  |
  |
  |
  |
rej2 |
  |
  |
  |
  |
  |
  |
  |
  |
  |
RATIOS
  |
204/206 |
207/206 |
208/206 |
196/238 |
206/238 |
248/238 |
254/238 |
error +- |
0.000011 |
0.300738 |
0.327065 |
4.471111 |
1.756218 |
8.154034 |
7.012738 |
ratio |
0.000015 |
0.001005 |
0.001364 |
0.023799 |
0.007680 |
0.034800 |
0.033870 |
CALIBRATION
CALIBRATION
Zr20/U=1.3034 Pb/U=0.2257 UO/U=6.9737 (Pb/U=0.03571(UO/U)^2)
REDUCED DATA
  |
rad cor |
+- |
age Ma |
+- |
  |
uncorrected |
  |
  |
  |
  |
  |
Pb206/U238 |
0.6969 |
0.0074 |
3408.8668 |
28.0 |
  |
Pb207/Pb206 |
0.3007 |
0.0010 |
3474.0281 |
5.2 |
  |
Pb207/U235 |
28.8973 |
0.3326 |
3450.0359 |
11.2 |
  |
Pb208/Th232 |
0.1767 |
0.0023 |
3288.0456 |
39.7 |
  |
204 corrected |
  |
  |
  |
  |
  |
Pb206/U238 |
0.6968 |
0.0074 |
3408.4032 |
28.0 |
  |
Pb207/Pb206 |
0.3006 |
0.0010 |
3473.4318 |
5.3 |
  |
Pb207/U235 |
28.8811 |
0.3336 |
3449.4861 |
11.3 |
  |
Pb208/Pb206 |
0.3267 |
0.0015 |
  |
  |
  |
Pb208/Th232 |
0.1764 |
0.0023 |
3284.4246 |
40.0 |
  |
207 corrected |
  |
  |
  |
  |
  |
Pb206/U238 |
0.6840 |
0.0073 |
3359.7448 |
28.0 |
  |
Pb208/Pb206 |
0.2913 |
0.0037 |
  |
  |
  |
Pb208/Th232 |
0.1544 |
0.0027 |
2902.2108 |
48.1 |
  |
208 corrected |
  |
  |
  |
  |
  |
Pb206/U238 |
0.7017 |
0.0075 |
3427.1525 |
28.4 |
  |
Pb207/Pb206 |
0.3053 |
0.0017 |
3497.2159 |
8.6 |
  |
Pb207/U235 |
29.5365 |
0.3740 |
3471.5165 |
12.4 |
  |
CONCENTRATIONS
CONCENTRATIONS
U:264.2 ppm Th:340.9 ppm Th/U:1.290 ±0.0 Pb204:1.7 ppb sens 16.9


