SHRIMP II v2 SW v2.13 ACQUISITION DATA PRINTOUT
analyst GSWA, mount G14-21-1,
BRA-13.1, 2014-08-15, 10:01:25, 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=1737, z=2441
primary beam = -2.0nA
QT1 Y defl = -1724 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 |
195.82014 |
0.00000 |
2.0 |
8.0 |
12 |
YES 3.0 |
REF |
ALW |
COUNTER |
R 1.0E-12 |
2 |
Pb204 |
203.97814 |
0.00000 |
10.0 |
3.0 |
11 |
NO 10.0 |
NONE |
ALW |
COUNTER |
  |
3 |
Bkgrnd |
204.02314 |
0.00000 |
10.0 |
5.0 |
11 |
NO 0.5 |
BAC |
ALW |
COUNTER |
  |
4 |
Pb206 |
205.98433 |
0.00000 |
10.0 |
4.0 |
11 |
YES 6.0 |
REF |
ALW |
COUNTER |
R 1.0E-12 |
5 |
Pb207 |
206.98934 |
0.00000 |
30.0 |
2.0 |
11 |
NO 5.0 |
NONE |
ALW |
COUNTER |
FS+10mV=1Mcps=FIXED As |
6 |
Pb208 |
207.99234 |
0.00000 |
10.0 |
2.0 |
11 |
NO 4.0 |
NONE |
ALW |
COUNTER |
  |
7 |
U238 |
238.06983 |
0.00000 |
5.0 |
3.0 |
10 |
YES 3.0 |
REF |
ALW |
COUNTER |
  |
8 |
ThO248 |
248.04642 |
0.00000 |
5.0 |
3.0 |
9 |
YES 3.0 |
NONE |
ALW |
COUNTER |
  |
9 |
UO254 |
254.05234 |
0.00000 |
2.0 |
3.0 |
9 |
YES 2.0 |
REF |
ALW |
COUNTER |
  |
AMU-B calibration field offset -0.076 G.
DATA
Zr2O |
20180 |
  |
20770 |
  |
21599 |
  |
22234 |
  |
22158 |
  |
22858 |
  |
Pb204 |
2 |
  |
2 |
  |
2 |
  |
0 |
  |
3 |
  |
1 |
  |
Bkgrnd |
1 |
  |
0 |
  |
0 |
  |
0 |
  |
0 |
  |
0 |
  |
Pb206 |
19072 |
  |
19080 |
  |
19092 |
  |
18426 |
  |
18683 |
R |
18345 |
  |
Pb207 |
3542 |
  |
3341 |
  |
3397 |
  |
3256 |
  |
3255 |
  |
3284 |
  |
Pb208 |
1308 |
  |
1284 |
  |
1225 |
  |
1187 |
  |
1206 |
  |
1247 |
  |
U238 |
38345 |
  |
39349 |
  |
40413 |
  |
40695 |
  |
41220 |
  |
41746 |
  |
ThO248 |
57028 |
  |
56683 |
  |
57331 |
  |
57235 |
  |
57407 |
  |
58021 |
  |
UO254 |
113024 |
  |
114218 |
  |
114146 |
  |
113861 |
  |
116694 |
  |
116331 |
R |
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 |
3.1 |
0.2 |
0.1 |
2.2 |
1.5 |
1.2 |
2.1 |
1.2 |
2.7 |
slope |
3.4 |
-0.0 |
-0.0 |
-1.0 |
-0.3 |
-0.1 |
4.3 |
1.3 |
4.7 |
interc |
2.0E+4 |
2.0E+0 |
5.7E-1 |
1.9E+4 |
3.5E+3 |
1.3E+3 |
3.8E+4 |
5.7E+4 |
1.1E+5 |
cps |
1.1E+4 |
1.6E-1 |
1.5E-2 |
1.9E+3 |
1.1E+2 |
1.2E+2 |
8.0E+3 |
1.1E+4 |
5.7E+4 |
rej1 |
  |
  |
  |
  |
  |
  |
  |
  |
113861 |
rej2 |
  |
  |
  |
  |
  |
  |
  |
  |
  |
RATIOS
  |
204/206 |
207/206 |
208/206 |
196/238 |
206/238 |
248/238 |
254/238 |
error +- |
0.000079 |
0.059504 |
0.066429 |
1.361252 |
0.234721 |
1.428920 |
7.155368 |
ratio |
0.000029 |
0.000582 |
0.000900 |
0.007768 |
0.001251 |
0.005024 |
0.025574 |
CALIBRATION
CALIBRATION
Zr20/U=1.3034 Pb/U=0.2257 UO/U=6.9737 (Pb/U=0.00458(UO/U)^2)
REDUCED DATA
  |
rad cor |
+- |
age Ma |
+- |
  |
uncorrected |
  |
  |
  |
  |
  |
Pb206/U238 |
0.0895 |
0.0008 |
552.3725 |
4.7 |
  |
Pb207/Pb206 |
0.0595 |
0.0006 |
585.5756 |
21.1 |
  |
Pb207/U235 |
0.7340 |
0.0103 |
558.9008 |
6.0 |
  |
Pb208/Th232 |
0.0267 |
0.0005 |
532.6096 |
8.9 |
  |
204 corrected |
  |
  |
  |
  |
  |
Pb206/U238 |
0.0894 |
0.0008 |
551.6999 |
4.7 |
  |
Pb207/Pb206 |
0.0584 |
0.0007 |
543.1489 |
27.4 |
  |
Pb207/U235 |
0.7189 |
0.0118 |
550.0356 |
6.9 |
  |
Pb208/Pb206 |
0.0637 |
0.0014 |
  |
  |
  |
Pb208/Th232 |
0.0256 |
0.0006 |
510.1929 |
12.1 |
  |
207 corrected |
  |
  |
  |
  |
  |
Pb206/U238 |
0.0894 |
0.0008 |
551.8339 |
4.7 |
  |
Pb208/Pb206 |
0.0642 |
0.0017 |
  |
  |
  |
Pb208/Th232 |
0.0258 |
0.0007 |
514.6604 |
14.4 |
  |
208 corrected |
  |
  |
  |
  |
  |
Pb206/U238 |
0.0896 |
0.0008 |
552.9850 |
4.7 |
  |
Pb207/Pb206 |
0.0605 |
0.0007 |
623.1627 |
25.6 |
  |
Pb207/U235 |
0.7477 |
0.0118 |
566.9077 |
6.8 |
  |
CONCENTRATIONS
CONCENTRATIONS
U:879.4 ppm Th:195.7 ppm Th/U:0.223 ±0.0 Pb204:5.4 ppb sens 17.6


