SHRIMP II v2 SW v2.13 ACQUISITION DATA PRINTOUT
analyst GSWA, mount G14-21-1,
BRA-11.1, 2014-08-15, 05:38:03, 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=1744, z=2308
primary beam = -1.9nA
QT1 Y defl = -1751 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 |
195.82331 |
0.00000 |
2.0 |
8.0 |
12 |
YES 3.0 |
REF |
ALW |
COUNTER |
R 1.0E-12 |
2 |
Pb204 |
203.98131 |
0.00000 |
10.0 |
3.0 |
11 |
NO 10.0 |
NONE |
ALW |
COUNTER |
  |
3 |
Bkgrnd |
204.02631 |
0.00000 |
10.0 |
5.0 |
11 |
NO 0.5 |
BAC |
ALW |
COUNTER |
  |
4 |
Pb206 |
205.98791 |
0.00000 |
10.0 |
4.0 |
11 |
YES 6.0 |
REF |
ALW |
COUNTER |
R 1.0E-12 |
5 |
Pb207 |
206.99291 |
0.00000 |
30.0 |
2.0 |
11 |
NO 5.0 |
NONE |
ALW |
COUNTER |
FS+10mV=1Mcps=FIXED As |
6 |
Pb208 |
207.99591 |
0.00000 |
10.0 |
2.0 |
11 |
NO 4.0 |
NONE |
ALW |
COUNTER |
  |
7 |
U238 |
238.07282 |
0.00000 |
5.0 |
3.0 |
10 |
YES 3.0 |
REF |
ALW |
COUNTER |
  |
8 |
ThO248 |
248.04954 |
0.00000 |
5.0 |
3.0 |
9 |
YES 3.0 |
NONE |
ALW |
COUNTER |
  |
9 |
UO254 |
254.05606 |
0.00000 |
2.0 |
3.0 |
9 |
YES 2.0 |
REF |
ALW |
COUNTER |
  |
AMU-B calibration field offset -0.076 G.
DATA
Zr2O |
18889 |
  |
19087 |
  |
19966 |
  |
20595 |
  |
20557 |
  |
20969 |
  |
Pb204 |
3 |
  |
3 |
  |
1 |
  |
3 |
  |
0 |
  |
0 |
  |
Bkgrnd |
0 |
  |
0 |
  |
0 |
  |
1 |
  |
1 |
  |
1 |
  |
Pb206 |
19374 |
  |
19115 |
  |
19028 |
  |
18920 |
  |
18555 |
  |
18302 |
  |
Pb207 |
3554 |
  |
3421 |
  |
3465 |
  |
3460 |
  |
3264 |
  |
3363 |
R |
Pb208 |
1350 |
  |
1285 |
  |
1319 |
  |
1280 |
  |
1265 |
  |
1226 |
  |
U238 |
37208 |
  |
38290 |
  |
39249 |
R |
39231 |
  |
40305 |
  |
40102 |
  |
ThO248 |
56405 |
  |
56001 |
  |
56404 |
  |
55383 |
  |
56465 |
  |
56129 |
  |
UO254 |
111849 |
  |
111522 |
  |
112838 |
  |
111184 |
  |
112167 |
  |
112101 |
  |
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 |
3.3 |
0.5 |
0.0 |
0.4 |
1.5 |
0.4 |
2.9 |
3.7 |
3.6 |
slope |
2.9 |
-0.0 |
0.0 |
-1.3 |
-0.3 |
-0.1 |
4.6 |
-0.2 |
0.3 |
interc |
1.9E+4 |
3.4E+0 |
-2.2E-1 |
1.9E+4 |
3.5E+3 |
1.4E+3 |
3.7E+4 |
5.6E+4 |
1.1E+5 |
cps |
1.0E+4 |
1.5E-1 |
5.3E-2 |
1.9E+3 |
1.1E+2 |
1.3E+2 |
7.8E+3 |
1.1E+4 |
5.6E+4 |
rej1 |
  |
  |
  |
  |
  |
  |
40102 |
  |
  |
rej2 |
  |
  |
  |
  |
  |
  |
  |
  |
  |
RATIOS
  |
204/206 |
207/206 |
208/206 |
196/238 |
206/238 |
248/238 |
254/238 |
error +- |
0.000052 |
0.060477 |
0.068491 |
1.294177 |
0.242685 |
1.442981 |
7.190868 |
ratio |
0.000027 |
0.000545 |
0.000806 |
0.008191 |
0.001119 |
0.006981 |
0.030313 |
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 |
0.0009 |
564.9299 |
5.2 |
  |
Pb207/Pb206 |
0.0605 |
0.0005 |
620.6917 |
19.3 |
  |
Pb207/U235 |
0.7637 |
0.0107 |
576.1578 |
6.1 |
  |
Pb208/Th232 |
0.0280 |
0.0005 |
558.4895 |
9.1 |
  |
204 corrected |
  |
  |
  |
  |
  |
Pb206/U238 |
0.0915 |
0.0009 |
564.4771 |
5.2 |
  |
Pb207/Pb206 |
0.0597 |
0.0007 |
593.5197 |
24.7 |
  |
Pb207/U235 |
0.7536 |
0.0120 |
570.2874 |
6.9 |
  |
Pb208/Pb206 |
0.0667 |
0.0013 |
  |
  |
  |
Pb208/Th232 |
0.0273 |
0.0006 |
543.4805 |
11.8 |
  |
207 corrected |
  |
  |
  |
  |
  |
Pb206/U238 |
0.0914 |
0.0009 |
564.0024 |
5.2 |
  |
Pb208/Pb206 |
0.0648 |
0.0016 |
  |
  |
  |
Pb208/Th232 |
0.0265 |
0.0007 |
527.7344 |
14.0 |
  |
208 corrected |
  |
  |
  |
  |
  |
Pb206/U238 |
0.0916 |
0.0009 |
565.1306 |
5.2 |
  |
Pb207/Pb206 |
0.0608 |
0.0007 |
632.5702 |
24.0 |
  |
Pb207/U235 |
0.7682 |
0.0120 |
578.7482 |
6.9 |
  |
CONCENTRATIONS
CONCENTRATIONS
U:928.0 ppm Th:207.8 ppm Th/U:0.224 ±0.0 Pb204:3.8 ppb sens 16.8


