SHRIMP II v2 SW v2.13 ACQUISITION DATA PRINTOUT
analyst GSWA, mount G14-21-1,
506-19.1, 2014-08-14, 23:12:09, 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=7986, y=1474, z=3314
primary beam = -1.9nA
QT1 Y defl = -1703 bits; QT1 Z defl = 400 bits
runtable 2014-08-14 GSWA 0955
duration: 15min 28sec (928sec)
RUN TABLE
# |
Name |
AMU |
AMU Offset |
Time s |
Delay s |
Coll Focus |
Centering |
Ref |
Cent |
Detector |
CUP Mode setting |
1 |
Zr2O |
195.82587 |
0.00000 |
2.0 |
8.0 |
12 |
YES 3.0 |
REF |
ALW |
COUNTER |
R 1.0E-12 |
2 |
Pb204 |
203.98386 |
0.00000 |
10.0 |
3.0 |
11 |
NO 10.0 |
NONE |
ALW |
COUNTER |
  |
3 |
Bkgrnd |
204.02886 |
0.00000 |
10.0 |
5.0 |
11 |
NO 0.5 |
BAC |
ALW |
COUNTER |
  |
4 |
Pb206 |
205.99031 |
0.00000 |
10.0 |
4.0 |
11 |
YES 6.0 |
REF |
ALW |
COUNTER |
R 1.0E-12 |
5 |
Pb207 |
206.99531 |
0.00000 |
30.0 |
2.0 |
11 |
NO 5.0 |
NONE |
ALW |
COUNTER |
FS+10mV=1Mcps=FIXED As |
6 |
Pb208 |
207.99831 |
0.00000 |
10.0 |
2.0 |
11 |
NO 4.0 |
NONE |
ALW |
COUNTER |
  |
7 |
U238 |
238.07674 |
0.00000 |
5.0 |
3.0 |
10 |
YES 3.0 |
REF |
ALW |
COUNTER |
  |
8 |
ThO248 |
248.05309 |
0.00000 |
5.0 |
3.0 |
9 |
YES 3.0 |
NONE |
ALW |
COUNTER |
  |
9 |
UO254 |
254.05907 |
0.00000 |
2.0 |
3.0 |
9 |
YES 2.0 |
REF |
ALW |
COUNTER |
  |
AMU-B calibration field offset -0.076 G.
DATA
Zr2O |
18496 |
  |
19290 |
  |
20176 |
  |
20457 |
  |
20706 |
  |
21188 |
  |
Pb204 |
0 |
  |
1 |
  |
1 |
  |
0 |
  |
0 |
  |
1 |
  |
Bkgrnd |
3 |
  |
1 |
  |
1 |
  |
1 |
  |
1 |
  |
1 |
  |
Pb206 |
2032 |
R |
2020 |
  |
1964 |
  |
1939 |
  |
1943 |
  |
1936 |
  |
Pb207 |
498 |
  |
511 |
  |
481 |
  |
455 |
  |
484 |
  |
497 |
  |
Pb208 |
1028 |
  |
953 |
R |
984 |
  |
937 |
  |
978 |
  |
1031 |
  |
U238 |
1887 |
  |
1990 |
  |
2000 |
  |
1980 |
  |
2057 |
  |
2050 |
  |
ThO248 |
21639 |
  |
21629 |
  |
21622 |
  |
21563 |
  |
21923 |
  |
22261 |
  |
UO254 |
5535 |
  |
5661 |
  |
5506 |
  |
5744 |
  |
5648 |
  |
5531 |
  |
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 |
3.5 |
0.2 |
0.3 |
0.2 |
0.9 |
1.9 |
0.6 |
1.7 |
2.0 |
slope |
3.3 |
0.0 |
-0.0 |
-0.1 |
-0.0 |
0.0 |
0.2 |
0.7 |
0.0 |
interc |
1.9E+4 |
4.2E-1 |
2.1E+0 |
2.0E+3 |
5.0E+2 |
9.8E+2 |
1.9E+3 |
2.1E+4 |
5.6E+3 |
cps |
1.0E+4 |
5.1E-2 |
1.3E-1 |
2.0E+2 |
1.6E+1 |
9.8E+1 |
4.0E+2 |
4.3E+3 |
2.8E+3 |
rej1 |
  |
  |
  |
  |
  |
  |
  |
  |
  |
rej2 |
  |
  |
  |
  |
  |
  |
  |
  |
  |
RATIOS
  |
204/206 |
207/206 |
208/206 |
196/238 |
206/238 |
248/238 |
254/238 |
error +- |
-0.000401 |
0.081890 |
0.498886 |
25.497094 |
0.497480 |
10.959573 |
7.067081 |
ratio |
-0.000266 |
0.001697 |
0.009968 |
0.270627 |
0.006456 |
0.107685 |
0.084187 |
CALIBRATION
CALIBRATION
Zr20/U=1.3034 Pb/U=0.2257 UO/U=6.9737 (Pb/U=0.00996(UO/U)^2)
REDUCED DATA
  |
rad cor |
+- |
age Ma |
+- |
  |
uncorrected |
  |
  |
  |
  |
  |
Pb206/U238 |
0.1944 |
0.0053 |
1145.0796 |
28.4 |
  |
Pb207/Pb206 |
0.0819 |
0.0017 |
1242.8905 |
40.1 |
  |
Pb207/U235 |
2.1948 |
0.0793 |
1179.3894 |
24.9 |
  |
Pb208/Th232 |
0.0563 |
0.0021 |
1106.2706 |
39.9 |
  |
204 corrected |
  |
  |
  |
  |
  |
Pb206/U238 |
0.1956 |
0.0054 |
1151.7992 |
28.9 |
  |
Pb207/Pb206 |
0.0875 |
0.0044 |
1371.3720 |
94.4 |
  |
Pb207/U235 |
2.3600 |
0.1429 |
1230.5781 |
42.3 |
  |
Pb208/Pb206 |
0.5099 |
0.0138 |
  |
  |
  |
Pb208/Th232 |
0.0579 |
0.0024 |
1137.0631 |
45.9 |
  |
207 corrected |
  |
  |
  |
  |
  |
Pb206/U238 |
0.1936 |
0.0053 |
1140.6892 |
28.4 |
  |
Pb208/Pb206 |
0.4916 |
0.0109 |
  |
  |
  |
Pb208/Th232 |
0.0552 |
0.0021 |
1086.1434 |
40.5 |
  |
208 corrected |
  |
  |
  |
  |
  |
Pb206/U238 |
0.1964 |
0.0055 |
1156.1046 |
29.7 |
  |
Pb207/Pb206 |
0.0910 |
0.0074 |
1447.6136 |
146.7 |
  |
Pb207/U235 |
2.4659 |
0.2193 |
1262.0962 |
62.3 |
  |
CONCENTRATIONS
CONCENTRATIONS
U:46.6 ppm Th:80.3 ppm Th/U:1.724 ±0.0 Pb204:-3.1 ppb sens 16.7


