SHRIMP II v2 SW v2.13 ACQUISITION DATA PRINTOUT
analyst GSWA, mount G14-21-1,
702-1.1, 2014-08-14, 19:28:47, 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=2080, z=2306
primary beam = -1.6nA
QT1 Y defl = -1723 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 |
195.82505 |
0.00000 |
2.0 |
8.0 |
12 |
YES 3.0 |
REF |
ALW |
COUNTER |
R 1.0E-12 |
2 |
Pb204 |
203.98304 |
0.00000 |
10.0 |
3.0 |
11 |
NO 10.0 |
NONE |
ALW |
COUNTER |
  |
3 |
Bkgrnd |
204.02804 |
0.00000 |
10.0 |
5.0 |
11 |
NO 0.5 |
BAC |
ALW |
COUNTER |
  |
4 |
Pb206 |
205.98855 |
0.00000 |
10.0 |
4.0 |
11 |
YES 6.0 |
REF |
ALW |
COUNTER |
R 1.0E-12 |
5 |
Pb207 |
206.99355 |
0.00000 |
30.0 |
2.0 |
11 |
NO 5.0 |
NONE |
ALW |
COUNTER |
FS+10mV=1Mcps=FIXED As |
6 |
Pb208 |
207.99655 |
0.00000 |
10.0 |
2.0 |
11 |
NO 4.0 |
NONE |
ALW |
COUNTER |
  |
7 |
U238 |
238.07355 |
0.00000 |
5.0 |
3.0 |
10 |
YES 3.0 |
REF |
ALW |
COUNTER |
  |
8 |
ThO248 |
248.05054 |
0.00000 |
5.0 |
3.0 |
9 |
YES 3.0 |
NONE |
ALW |
COUNTER |
  |
9 |
UO254 |
254.05698 |
0.00000 |
2.0 |
3.0 |
9 |
YES 2.0 |
REF |
ALW |
COUNTER |
  |
AMU-B calibration field offset -0.076 G.
DATA
Zr2O |
16811 |
  |
17203 |
  |
17579 |
  |
18266 |
  |
18149 |
  |
18380 |
  |
Pb204 |
1 |
  |
1 |
  |
2 |
  |
1 |
  |
1 |
  |
3 |
  |
Bkgrnd |
1 |
  |
0 |
  |
0 |
  |
1 |
  |
1 |
  |
1 |
  |
Pb206 |
1663 |
  |
1667 |
  |
1670 |
  |
1567 |
  |
1592 |
  |
1582 |
  |
Pb207 |
451 |
  |
433 |
  |
388 |
  |
391 |
  |
356 |
  |
342 |
  |
Pb208 |
816 |
  |
811 |
  |
791 |
  |
772 |
  |
743 |
  |
751 |
  |
U238 |
1763 |
  |
1770 |
  |
1858 |
  |
1791 |
  |
1910 |
  |
1843 |
  |
ThO248 |
18971 |
  |
19148 |
  |
19039 |
  |
18844 |
  |
19554 |
  |
19049 |
R |
UO254 |
5044 |
  |
5164 |
  |
5020 |
  |
4958 |
  |
5047 |
  |
4989 |
  |
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 |
2.5 |
0.4 |
0.1 |
0.6 |
0.3 |
0.1 |
1.1 |
3.5 |
0.9 |
slope |
2.1 |
0.0 |
0.0 |
-0.1 |
-0.1 |
-0.1 |
0.1 |
0.3 |
-0.1 |
interc |
1.7E+4 |
8.0E-1 |
3.5E-1 |
1.7E+3 |
4.6E+2 |
8.3E+2 |
1.8E+3 |
1.9E+4 |
5.1E+3 |
cps |
8.9E+3 |
1.6E-1 |
6.8E-2 |
1.6E+2 |
1.3E+1 |
7.9E+1 |
3.6E+2 |
3.8E+3 |
2.5E+3 |
rej1 |
  |
  |
  |
  |
  |
  |
  |
  |
  |
rej2 |
  |
  |
  |
  |
  |
  |
  |
  |
  |
RATIOS
  |
204/206 |
207/206 |
208/206 |
196/238 |
206/238 |
248/238 |
254/238 |
error +- |
0.000541 |
0.081138 |
0.483574 |
24.584477 |
0.447619 |
10.523415 |
6.961022 |
ratio |
0.000390 |
0.001865 |
0.008607 |
0.279252 |
0.006455 |
0.122524 |
0.081862 |
CALIBRATION
CALIBRATION
Zr20/U=1.3034 Pb/U=0.2257 UO/U=6.9737 (Pb/U=0.00924(UO/U)^2)
REDUCED DATA
  |
rad cor |
+- |
age Ma |
+- |
  |
uncorrected |
  |
  |
  |
  |
  |
Pb206/U238 |
0.1803 |
0.0050 |
1068.4573 |
27.1 |
  |
Pb207/Pb206 |
0.0811 |
0.0019 |
1224.7859 |
44.5 |
  |
Pb207/U235 |
2.0167 |
0.0767 |
1121.1654 |
25.5 |
  |
Pb208/Th232 |
0.0520 |
0.0019 |
1025.5670 |
36.7 |
  |
204 corrected |
  |
  |
  |
  |
  |
Pb206/U238 |
0.1787 |
0.0051 |
1059.9242 |
27.6 |
  |
Pb207/Pb206 |
0.0734 |
0.0063 |
1026.2301 |
165.2 |
  |
Pb207/U235 |
1.8097 |
0.1702 |
1048.9701 |
59.7 |
  |
Pb208/Pb206 |
0.4683 |
0.0168 |
  |
  |
  |
Pb208/Th232 |
0.0500 |
0.0024 |
985.6159 |
46.6 |
  |
207 corrected |
  |
  |
  |
  |
  |
Pb206/U238 |
0.1790 |
0.0050 |
1061.2867 |
27.0 |
  |
Pb208/Pb206 |
0.4708 |
0.0099 |
  |
  |
  |
Pb208/Th232 |
0.0503 |
0.0019 |
991.9967 |
37.3 |
  |
208 corrected |
  |
  |
  |
  |
  |
Pb206/U238 |
0.1824 |
0.0052 |
1080.3034 |
28.2 |
  |
Pb207/Pb206 |
0.0916 |
0.0069 |
1459.4582 |
137.4 |
  |
Pb207/U235 |
2.3046 |
0.1938 |
1213.7146 |
57.9 |
  |
CONCENTRATIONS
CONCENTRATIONS
U:47.8 ppm Th:80.1 ppm Th/U:1.675 ±0.0 Pb204:4.0 ppb sens 16.3


