SHRIMP II v2 SW v2.13 ACQUISITION DATA PRINTOUT
analyst GSWA, mount G14-21-1,
506-1.1, 2014-08-14, 12:05:34, 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=7981, y=1513, z=2120
primary beam = -1.8nA
QT1 Y defl = -1770 bits; QT1 Z defl = 385 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 |
195.81633 |
0.00000 |
2.0 |
8.0 |
12 |
YES 3.0 |
REF |
ALW |
COUNTER |
R 1.0E-12 |
2 |
Pb204 |
203.97433 |
0.00000 |
10.0 |
3.0 |
11 |
NO 10.0 |
NONE |
ALW |
COUNTER |
  |
3 |
Bkgrnd |
204.01933 |
0.00000 |
10.0 |
5.0 |
11 |
NO 0.5 |
BAC |
ALW |
COUNTER |
  |
4 |
Pb206 |
205.97945 |
0.00000 |
10.0 |
4.0 |
11 |
YES 6.0 |
REF |
ALW |
COUNTER |
R 1.0E-12 |
5 |
Pb207 |
206.98446 |
0.00000 |
30.0 |
2.0 |
11 |
NO 5.0 |
NONE |
ALW |
COUNTER |
FS+10mV=1Mcps=FIXED As |
6 |
Pb208 |
207.98746 |
0.00000 |
10.0 |
2.0 |
11 |
NO 4.0 |
NONE |
ALW |
COUNTER |
  |
7 |
U238 |
238.06423 |
0.00000 |
5.0 |
3.0 |
10 |
YES 3.0 |
REF |
ALW |
COUNTER |
  |
8 |
ThO248 |
248.04068 |
0.00000 |
5.0 |
3.0 |
9 |
YES 3.0 |
NONE |
ALW |
COUNTER |
  |
9 |
UO254 |
254.04640 |
0.00000 |
2.0 |
3.0 |
9 |
YES 2.0 |
REF |
ALW |
COUNTER |
  |
AMU-B calibration field offset -0.076 G.
DATA
Zr2O |
19196 |
  |
19856 |
  |
20356 |
  |
20338 |
  |
20467 |
  |
21034 |
  |
Pb204 |
3 |
  |
5 |
  |
1 |
  |
1 |
  |
0 |
  |
1 |
  |
Bkgrnd |
1 |
  |
1 |
  |
0 |
  |
0 |
  |
1 |
  |
1 |
  |
Pb206 |
2044 |
  |
2000 |
  |
2019 |
  |
1911 |
  |
1832 |
  |
1820 |
R |
Pb207 |
528 |
  |
523 |
  |
468 |
  |
439 |
  |
468 |
  |
449 |
  |
Pb208 |
770 |
  |
802 |
  |
745 |
  |
703 |
  |
626 |
R |
697 |
  |
U238 |
1858 |
  |
1954 |
  |
1974 |
  |
1922 |
  |
2047 |
  |
1965 |
  |
ThO248 |
15809 |
  |
14982 |
  |
15144 |
  |
14971 |
  |
15267 |
  |
15200 |
  |
UO254 |
5607 |
  |
5191 |
  |
5199 |
  |
5461 |
  |
5334 |
  |
5433 |
  |
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 |
2.6 |
0.9 |
0.1 |
0.6 |
1.2 |
2.5 |
1.4 |
0.8 |
1.6 |
slope |
2.0 |
-0.0 |
-0.0 |
-0.3 |
-0.1 |
-0.2 |
0.1 |
0.4 |
0.4 |
interc |
1.9E+4 |
3.8E+0 |
6.7E-1 |
2.1E+3 |
5.3E+2 |
8.1E+2 |
1.9E+3 |
1.5E+4 |
5.1E+3 |
cps |
1.0E+4 |
1.7E-1 |
6.7E-2 |
1.9E+2 |
1.6E+1 |
7.3E+1 |
3.9E+2 |
3.0E+3 |
2.6E+3 |
rej1 |
  |
  |
  |
  |
  |
  |
  |
15809 |
5607 |
rej2 |
  |
  |
  |
  |
  |
  |
  |
  |
  |
RATIOS
  |
204/206 |
207/206 |
208/206 |
196/238 |
206/238 |
248/238 |
254/238 |
error +- |
0.000516 |
0.082559 |
0.377531 |
26.112138 |
0.498441 |
7.745519 |
6.760356 |
ratio |
0.000285 |
0.001826 |
0.009785 |
0.310867 |
0.007167 |
0.088843 |
0.088121 |
CALIBRATION
CALIBRATION
Zr20/U=1.3034 Pb/U=0.2257 UO/U=6.9737 (Pb/U=0.01091(UO/U)^2)
REDUCED DATA
  |
rad cor |
+- |
age Ma |
+- |
  |
uncorrected |
  |
  |
  |
  |
  |
Pb206/U238 |
0.2128 |
0.0063 |
1243.8943 |
33.6 |
  |
Pb207/Pb206 |
0.0826 |
0.0018 |
1258.8146 |
42.6 |
  |
Pb207/U235 |
2.4227 |
0.0951 |
1249.3682 |
27.8 |
  |
Pb208/Th232 |
0.0637 |
0.0027 |
1248.1724 |
52.1 |
  |
204 corrected |
  |
  |
  |
  |
  |
Pb206/U238 |
0.2111 |
0.0064 |
1234.5497 |
33.8 |
  |
Pb207/Pb206 |
0.0752 |
0.0048 |
1074.9508 |
122.7 |
  |
Pb207/U235 |
2.1898 |
0.1614 |
1177.7889 |
50.1 |
  |
Pb208/Pb206 |
0.3621 |
0.0143 |
  |
  |
  |
Pb208/Th232 |
0.0606 |
0.0032 |
1189.1093 |
60.8 |
  |
207 corrected |
  |
  |
  |
  |
  |
Pb206/U238 |
0.2126 |
0.0063 |
1242.5875 |
33.6 |
  |
Pb208/Pb206 |
0.3754 |
0.0109 |
  |
  |
  |
Pb208/Th232 |
0.0633 |
0.0029 |
1239.9181 |
54.1 |
  |
208 corrected |
  |
  |
  |
  |
  |
Pb206/U238 |
0.2127 |
0.0065 |
1243.0794 |
34.3 |
  |
Pb207/Pb206 |
0.0819 |
0.0064 |
1243.7347 |
145.8 |
  |
Pb207/U235 |
2.4024 |
0.2097 |
1243.3192 |
60.7 |
  |
CONCENTRATIONS
CONCENTRATIONS
U:44.2 ppm Th:55.7 ppm Th/U:1.261 ±0.0 Pb204:4.2 ppb sens 16.3


