SHRIMP II v2 SW v2.13 ACQUISITION DATA PRINTOUT
analyst GSWA, mount G14-21-1,
BRA-7.1, 2014-08-14, 21:57:19, 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=1829, z=2413
primary beam = -1.8nA
QT1 Y defl = -1726 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 |
195.82526 |
0.00000 |
2.0 |
8.0 |
12 |
YES 3.0 |
REF |
ALW |
COUNTER |
R 1.0E-12 |
2 |
Pb204 |
203.98326 |
0.00000 |
10.0 |
3.0 |
11 |
NO 10.0 |
NONE |
ALW |
COUNTER |
  |
3 |
Bkgrnd |
204.02826 |
0.00000 |
10.0 |
5.0 |
11 |
NO 0.5 |
BAC |
ALW |
COUNTER |
  |
4 |
Pb206 |
205.98943 |
0.00000 |
10.0 |
4.0 |
11 |
YES 6.0 |
REF |
ALW |
COUNTER |
R 1.0E-12 |
5 |
Pb207 |
206.99443 |
0.00000 |
30.0 |
2.0 |
11 |
NO 5.0 |
NONE |
ALW |
COUNTER |
FS+10mV=1Mcps=FIXED As |
6 |
Pb208 |
207.99743 |
0.00000 |
10.0 |
2.0 |
11 |
NO 4.0 |
NONE |
ALW |
COUNTER |
  |
7 |
U238 |
238.07528 |
0.00000 |
5.0 |
3.0 |
10 |
YES 3.0 |
REF |
ALW |
COUNTER |
  |
8 |
ThO248 |
248.05215 |
0.00000 |
5.0 |
3.0 |
9 |
YES 3.0 |
NONE |
ALW |
COUNTER |
  |
9 |
UO254 |
254.05825 |
0.00000 |
2.0 |
3.0 |
9 |
YES 2.0 |
REF |
ALW |
COUNTER |
  |
AMU-B calibration field offset -0.076 G.
DATA
Zr2O |
18235 |
  |
18774 |
  |
19681 |
  |
20380 |
  |
20244 |
  |
20607 |
  |
Pb204 |
1 |
  |
2 |
  |
2 |
  |
3 |
  |
1 |
  |
1 |
  |
Bkgrnd |
1 |
  |
1 |
  |
2 |
  |
0 |
  |
1 |
  |
0 |
  |
Pb206 |
18986 |
  |
19095 |
R |
18606 |
  |
18045 |
  |
18451 |
  |
17913 |
R |
Pb207 |
3456 |
  |
3301 |
  |
3267 |
  |
3317 |
R |
3316 |
  |
3229 |
  |
Pb208 |
1312 |
  |
1344 |
  |
1329 |
  |
1234 |
  |
1193 |
  |
1266 |
  |
U238 |
37340 |
  |
38103 |
  |
38503 |
  |
39606 |
  |
39560 |
  |
40782 |
  |
ThO248 |
55997 |
  |
55522 |
  |
55707 |
  |
55342 |
  |
56186 |
  |
57107 |
  |
UO254 |
110271 |
  |
110120 |
  |
110230 |
  |
110697 |
  |
111751 |
  |
111359 |
  |
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 |
3.0 |
0.5 |
0.2 |
3.7 |
1.1 |
1.7 |
2.0 |
2.8 |
1.4 |
slope |
3.0 |
-0.0 |
-0.0 |
-1.5 |
-0.2 |
-0.1 |
4.2 |
0.1 |
2.0 |
interc |
1.8E+4 |
1.8E+0 |
1.4E+0 |
1.9E+4 |
3.4E+3 |
1.4E+3 |
3.7E+4 |
5.6E+4 |
1.1E+5 |
cps |
9.8E+3 |
1.7E-1 |
8.1E-2 |
1.9E+3 |
1.1E+2 |
1.3E+2 |
7.7E+3 |
1.1E+4 |
5.5E+4 |
rej1 |
20380 |
  |
  |
  |
  |
  |
  |
57107 |
  |
rej2 |
  |
  |
  |
  |
  |
  |
  |
  |
  |
RATIOS
  |
204/206 |
207/206 |
208/206 |
196/238 |
206/238 |
248/238 |
254/238 |
error +- |
0.000046 |
0.059702 |
0.069435 |
1.272119 |
0.239207 |
1.440260 |
7.140412 |
ratio |
0.000035 |
0.000558 |
0.001121 |
0.007371 |
0.001545 |
0.005889 |
0.023079 |
CALIBRATION
CALIBRATION
Zr20/U=1.3034 Pb/U=0.2257 UO/U=6.9737 (Pb/U=0.00469(UO/U)^2)
REDUCED DATA
  |
rad cor |
+- |
age Ma |
+- |
  |
uncorrected |
  |
  |
  |
  |
  |
Pb206/U238 |
0.0916 |
0.0008 |
564.7383 |
4.9 |
  |
Pb207/Pb206 |
0.0597 |
0.0006 |
592.8003 |
20.1 |
  |
Pb207/U235 |
0.7537 |
0.0104 |
570.3534 |
6.0 |
  |
Pb208/Th232 |
0.0283 |
0.0005 |
563.8818 |
10.7 |
  |
204 corrected |
  |
  |
  |
  |
  |
Pb206/U238 |
0.0915 |
0.0008 |
564.3431 |
4.9 |
  |
Pb207/Pb206 |
0.0590 |
0.0008 |
568.6608 |
28.5 |
  |
Pb207/U235 |
0.7448 |
0.0127 |
565.2021 |
7.3 |
  |
Pb208/Pb206 |
0.0679 |
0.0017 |
  |
  |
  |
Pb208/Th232 |
0.0276 |
0.0007 |
550.8329 |
14.7 |
  |
207 corrected |
  |
  |
  |
  |
  |
Pb206/U238 |
0.0915 |
0.0008 |
564.2731 |
4.9 |
  |
Pb208/Pb206 |
0.0676 |
0.0018 |
  |
  |
  |
Pb208/Th232 |
0.0275 |
0.0008 |
548.5209 |
15.3 |
  |
208 corrected |
  |
  |
  |
  |
  |
Pb206/U238 |
0.0916 |
0.0008 |
564.7651 |
4.9 |
  |
Pb207/Pb206 |
0.0597 |
0.0008 |
594.4220 |
27.6 |
  |
Pb207/U235 |
0.7543 |
0.0126 |
570.7016 |
7.2 |
  |
CONCENTRATIONS
CONCENTRATIONS
U:939.8 ppm Th:211.2 ppm Th/U:0.225 ±0.0 Pb204:3.4 ppb sens 16.6


