SHRIMP II v2 SW v2.13 ACQUISITION DATA PRINTOUT
analyst GSWA, mount G14-21-1,
702-8.1, 2014-08-15, 04:16:56, 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=7985, y=2288, z=2503
primary beam = -1.9nA
QT1 Y defl = -1757 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 |
195.82396 |
0.00000 |
2.0 |
8.0 |
12 |
YES 3.0 |
REF |
ALW |
COUNTER |
R 1.0E-12 |
2 |
Pb204 |
203.98196 |
0.00000 |
10.0 |
3.0 |
11 |
NO 10.0 |
NONE |
ALW |
COUNTER |
  |
3 |
Bkgrnd |
204.02696 |
0.00000 |
10.0 |
5.0 |
11 |
NO 0.5 |
BAC |
ALW |
COUNTER |
  |
4 |
Pb206 |
205.98693 |
0.00000 |
10.0 |
4.0 |
11 |
YES 6.0 |
REF |
ALW |
COUNTER |
R 1.0E-12 |
5 |
Pb207 |
206.99193 |
0.00000 |
30.0 |
2.0 |
11 |
NO 5.0 |
NONE |
ALW |
COUNTER |
FS+10mV=1Mcps=FIXED As |
6 |
Pb208 |
207.99493 |
0.00000 |
10.0 |
2.0 |
11 |
NO 4.0 |
NONE |
ALW |
COUNTER |
  |
7 |
U238 |
238.07358 |
0.00000 |
5.0 |
3.0 |
10 |
YES 3.0 |
REF |
ALW |
COUNTER |
  |
8 |
ThO248 |
248.04966 |
0.00000 |
5.0 |
3.0 |
9 |
YES 3.0 |
NONE |
ALW |
COUNTER |
  |
9 |
UO254 |
254.05621 |
0.00000 |
2.0 |
3.0 |
9 |
YES 2.0 |
REF |
ALW |
COUNTER |
  |
AMU-B calibration field offset -0.076 G.
DATA
Zr2O |
18396 |
  |
19053 |
  |
19472 |
  |
20113 |
  |
20593 |
  |
20680 |
  |
Pb204 |
1 |
  |
0 |
  |
0 |
  |
1 |
  |
1 |
  |
1 |
  |
Bkgrnd |
0 |
  |
1 |
  |
0 |
  |
1 |
  |
1 |
  |
0 |
  |
Pb206 |
3737 |
  |
3706 |
  |
3499 |
  |
3393 |
  |
3375 |
  |
3101 |
  |
Pb207 |
821 |
  |
802 |
  |
825 |
  |
760 |
  |
742 |
  |
723 |
  |
Pb208 |
2206 |
  |
2034 |
  |
1872 |
  |
1789 |
  |
1901 |
  |
1867 |
  |
U238 |
3761 |
  |
3918 |
  |
3827 |
  |
3777 |
  |
3634 |
  |
3729 |
  |
ThO248 |
48987 |
  |
47341 |
  |
46766 |
  |
45687 |
  |
45988 |
  |
45382 |
  |
UO254 |
11170 |
  |
11042 |
  |
10783 |
  |
10628 |
  |
10520 |
  |
10218 |
  |
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 |
1.5 |
0.1 |
0.2 |
1.3 |
0.5 |
4.0 |
1.9 |
2.8 |
0.2 |
slope |
3.1 |
0.0 |
0.0 |
-0.8 |
-0.1 |
-0.2 |
-0.2 |
-3.1 |
-1.2 |
interc |
1.8E+4 |
3.6E-1 |
4.2E-1 |
3.8E+3 |
8.4E+2 |
2.0E+3 |
3.9E+3 |
4.8E+4 |
1.1E+4 |
cps |
9.9E+3 |
6.9E-2 |
5.0E-2 |
3.5E+2 |
2.6E+1 |
1.9E+2 |
7.6E+2 |
9.3E+3 |
5.4E+3 |
rej1 |
  |
  |
  |
  |
  |
2206 |
  |
48987 |
  |
rej2 |
  |
  |
  |
  |
  |
  |
  |
  |
  |
RATIOS
  |
204/206 |
207/206 |
208/206 |
196/238 |
206/238 |
248/238 |
254/238 |
error +- |
0.000055 |
0.075004 |
0.552404 |
13.110750 |
0.458176 |
12.334121 |
7.152994 |
ratio |
0.000144 |
0.001246 |
0.011133 |
0.130007 |
0.005555 |
0.120523 |
0.071880 |
CALIBRATION
CALIBRATION
Zr20/U=1.3034 Pb/U=0.2257 UO/U=6.9737 (Pb/U=0.00895(UO/U)^2)
REDUCED DATA
  |
rad cor |
+- |
age Ma |
+- |
  |
uncorrected |
  |
  |
  |
  |
  |
Pb206/U238 |
0.1748 |
0.0041 |
1038.2373 |
22.5 |
  |
Pb207/Pb206 |
0.0750 |
0.0012 |
1068.6185 |
33.0 |
  |
Pb207/U235 |
1.8072 |
0.0549 |
1048.0692 |
19.7 |
  |
Pb208/Th232 |
0.0502 |
0.0017 |
990.6235 |
32.8 |
  |
204 corrected |
  |
  |
  |
  |
  |
Pb206/U238 |
0.1746 |
0.0041 |
1037.3995 |
22.6 |
  |
Pb207/Pb206 |
0.0742 |
0.0026 |
1047.6996 |
67.9 |
  |
Pb207/U235 |
1.7870 |
0.0788 |
1040.7198 |
28.3 |
  |
Pb208/Pb206 |
0.5509 |
0.0123 |
  |
  |
  |
Pb208/Th232 |
0.0501 |
0.0018 |
987.2161 |
34.1 |
  |
207 corrected |
  |
  |
  |
  |
  |
Pb206/U238 |
0.1745 |
0.0041 |
1036.9916 |
22.5 |
  |
Pb208/Pb206 |
0.5502 |
0.0116 |
  |
  |
  |
Pb208/Th232 |
0.0500 |
0.0017 |
985.5572 |
33.2 |
  |
208 corrected |
  |
  |
  |
  |
  |
Pb206/U238 |
0.1776 |
0.0044 |
1054.0596 |
24.1 |
  |
Pb207/Pb206 |
0.0894 |
0.0081 |
1413.0889 |
164.2 |
  |
Pb207/U235 |
2.1900 |
0.2123 |
1177.8810 |
65.4 |
  |
CONCENTRATIONS
CONCENTRATIONS
U:91.3 ppm Th:175.4 ppm Th/U:1.922 ±0.0 Pb204:0.7 ppb sens 16.4


