SHRIMP II v2 SW v2.13 ACQUISITION DATA PRINTOUT
analyst GSWA, mount G14-21-1,
506-15.1, 2014-08-14, 18:07:37, 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=1287, z=3138
primary beam = -1.8nA
QT1 Y defl = -1723 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 |
195.82073 |
0.00000 |
2.0 |
8.0 |
12 |
YES 3.0 |
REF |
ALW |
COUNTER |
R 1.0E-12 |
2 |
Pb204 |
203.97873 |
0.00000 |
10.0 |
3.0 |
11 |
NO 10.0 |
NONE |
ALW |
COUNTER |
  |
3 |
Bkgrnd |
204.02373 |
0.00000 |
10.0 |
5.0 |
11 |
NO 0.5 |
BAC |
ALW |
COUNTER |
  |
4 |
Pb206 |
205.98438 |
0.00000 |
10.0 |
4.0 |
11 |
YES 6.0 |
REF |
ALW |
COUNTER |
R 1.0E-12 |
5 |
Pb207 |
206.98939 |
0.00000 |
30.0 |
2.0 |
11 |
NO 5.0 |
NONE |
ALW |
COUNTER |
FS+10mV=1Mcps=FIXED As |
6 |
Pb208 |
207.99239 |
0.00000 |
10.0 |
2.0 |
11 |
NO 4.0 |
NONE |
ALW |
COUNTER |
  |
7 |
U238 |
238.06995 |
0.00000 |
5.0 |
3.0 |
10 |
YES 3.0 |
REF |
ALW |
COUNTER |
  |
8 |
ThO248 |
248.04735 |
0.00000 |
5.0 |
3.0 |
9 |
YES 3.0 |
NONE |
ALW |
COUNTER |
  |
9 |
UO254 |
254.05331 |
0.00000 |
2.0 |
3.0 |
9 |
YES 2.0 |
REF |
ALW |
COUNTER |
  |
AMU-B calibration field offset -0.076 G.
DATA
Zr2O |
17848 |
  |
18531 |
  |
18936 |
  |
19818 |
  |
20181 |
  |
20311 |
  |
Pb204 |
1 |
  |
2 |
  |
0 |
  |
0 |
  |
1 |
  |
2 |
  |
Bkgrnd |
2 |
  |
1 |
  |
0 |
  |
1 |
  |
0 |
  |
1 |
  |
Pb206 |
2504 |
  |
2466 |
  |
2422 |
  |
2359 |
  |
2272 |
  |
2263 |
R |
Pb207 |
620 |
  |
643 |
  |
553 |
  |
599 |
  |
583 |
R |
551 |
  |
Pb208 |
1103 |
  |
1047 |
  |
984 |
  |
917 |
  |
986 |
  |
953 |
  |
U238 |
2340 |
  |
2493 |
  |
2369 |
  |
2545 |
  |
2501 |
  |
2479 |
  |
ThO248 |
22200 |
  |
21414 |
  |
21580 |
  |
21313 |
  |
21859 |
  |
21304 |
  |
UO254 |
6739 |
  |
6766 |
  |
6829 |
  |
6806 |
  |
6718 |
  |
6738 |
  |
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 |
2.4 |
0.2 |
0.2 |
0.2 |
1.5 |
2.1 |
2.2 |
3.3 |
0.3 |
slope |
3.4 |
0.0 |
-0.0 |
-0.3 |
-0.1 |
-0.2 |
0.2 |
0.0 |
-0.0 |
interc |
1.8E+4 |
8.5E-1 |
1.4E+0 |
2.5E+3 |
6.3E+2 |
1.1E+3 |
2.4E+3 |
2.1E+4 |
6.8E+3 |
cps |
9.7E+3 |
1.0E-1 |
8.1E-2 |
2.4E+2 |
2.0E+1 |
1.0E+2 |
4.9E+2 |
4.3E+3 |
3.4E+3 |
rej1 |
  |
  |
  |
  |
  |
  |
  |
22200 |
  |
rej2 |
  |
  |
  |
  |
  |
  |
  |
  |
  |
RATIOS
  |
204/206 |
207/206 |
208/206 |
196/238 |
206/238 |
248/238 |
254/238 |
error +- |
0.000086 |
0.082785 |
0.422732 |
19.877237 |
0.487301 |
8.794831 |
6.926024 |
ratio |
0.000286 |
0.001832 |
0.008696 |
0.258370 |
0.007199 |
0.115934 |
0.091048 |
CALIBRATION
CALIBRATION
Zr20/U=1.3034 Pb/U=0.2257 UO/U=6.9737 (Pb/U=0.01016(UO/U)^2)
REDUCED DATA
  |
rad cor |
+- |
age Ma |
+- |
  |
uncorrected |
  |
  |
  |
  |
  |
Pb206/U238 |
0.1982 |
0.0060 |
1165.8644 |
32.1 |
  |
Pb207/Pb206 |
0.0828 |
0.0018 |
1264.1509 |
42.6 |
  |
Pb207/U235 |
2.2628 |
0.0895 |
1200.7780 |
27.5 |
  |
Pb208/Th232 |
0.0596 |
0.0024 |
1170.7711 |
46.6 |
  |
204 corrected |
  |
  |
  |
  |
  |
Pb206/U238 |
0.1980 |
0.0060 |
1164.3920 |
32.4 |
  |
Pb207/Pb206 |
0.0816 |
0.0048 |
1235.2096 |
111.0 |
  |
Pb207/U235 |
2.2265 |
0.1546 |
1189.4213 |
47.5 |
  |
Pb208/Pb206 |
0.4202 |
0.0136 |
  |
  |
  |
Pb208/Th232 |
0.0592 |
0.0029 |
1162.4917 |
54.3 |
  |
207 corrected |
  |
  |
  |
  |
  |
Pb206/U238 |
0.1973 |
0.0060 |
1160.9192 |
32.0 |
  |
Pb208/Pb206 |
0.4143 |
0.0099 |
  |
  |
  |
Pb208/Th232 |
0.0582 |
0.0025 |
1142.9576 |
47.5 |
  |
208 corrected |
  |
  |
  |
  |
  |
Pb206/U238 |
0.1980 |
0.0061 |
1164.7886 |
32.8 |
  |
Pb207/Pb206 |
0.0819 |
0.0065 |
1243.0656 |
148.4 |
  |
Pb207/U235 |
2.2363 |
0.1987 |
1192.4922 |
60.5 |
  |
CONCENTRATIONS
CONCENTRATIONS
U:58.9 ppm Th:82.8 ppm Th/U:1.405 ±0.0 Pb204:0.9 ppb sens 16.4


