SHRIMP II v2 SW v2.13 ACQUISITION DATA PRINTOUT
analyst GSWA, mount G14-21-1,
BRB-8.1, 2014-08-14, 23:52:42, 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=7998, y=1767, z=3858
primary beam = -1.9nA
QT1 Y defl = -1727 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 |
195.82518 |
0.00000 |
2.0 |
8.0 |
12 |
YES 3.0 |
REF |
ALW |
COUNTER |
R 1.0E-12 |
2 |
Pb204 |
203.98318 |
0.00000 |
10.0 |
3.0 |
11 |
NO 10.0 |
NONE |
ALW |
COUNTER |
  |
3 |
Bkgrnd |
204.02818 |
0.00000 |
10.0 |
5.0 |
11 |
NO 0.5 |
BAC |
ALW |
COUNTER |
  |
4 |
Pb206 |
205.98933 |
0.00000 |
10.0 |
4.0 |
11 |
YES 6.0 |
REF |
ALW |
COUNTER |
R 1.0E-12 |
5 |
Pb207 |
206.99434 |
0.00000 |
30.0 |
2.0 |
11 |
NO 5.0 |
NONE |
ALW |
COUNTER |
FS+10mV=1Mcps=FIXED As |
6 |
Pb208 |
207.99734 |
0.00000 |
10.0 |
2.0 |
11 |
NO 4.0 |
NONE |
ALW |
COUNTER |
  |
7 |
U238 |
238.07655 |
0.00000 |
5.0 |
3.0 |
10 |
YES 3.0 |
REF |
ALW |
COUNTER |
  |
8 |
ThO248 |
248.05255 |
0.00000 |
5.0 |
3.0 |
9 |
YES 3.0 |
NONE |
ALW |
COUNTER |
  |
9 |
UO254 |
254.05930 |
0.00000 |
2.0 |
3.0 |
9 |
YES 2.0 |
REF |
ALW |
COUNTER |
  |
AMU-B calibration field offset -0.076 G.
DATA
Zr2O |
18953 |
  |
19237 |
  |
19710 |
  |
20139 |
R |
20662 |
  |
21470 |
  |
Pb204 |
3 |
  |
1 |
  |
1 |
  |
0 |
  |
2 |
  |
2 |
  |
Bkgrnd |
0 |
  |
0 |
  |
1 |
  |
1 |
  |
0 |
  |
1 |
  |
Pb206 |
18489 |
  |
18131 |
  |
17595 |
  |
17903 |
  |
17125 |
  |
17547 |
  |
Pb207 |
3334 |
  |
3232 |
  |
3148 |
  |
3169 |
  |
3126 |
  |
3168 |
  |
Pb208 |
1382 |
  |
1213 |
  |
1221 |
  |
1173 |
  |
1167 |
  |
1181 |
  |
U238 |
35930 |
  |
37205 |
  |
37653 |
  |
38226 |
  |
38952 |
  |
38901 |
  |
ThO248 |
54640 |
  |
54786 |
  |
54451 |
  |
55540 |
  |
54808 |
  |
54785 |
  |
UO254 |
107422 |
  |
107640 |
  |
106968 |
  |
108100 |
  |
108038 |
  |
108018 |
  |
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 |
1.3 |
0.4 |
0.1 |
3.6 |
0.9 |
2.5 |
3.3 |
2.9 |
1.4 |
slope |
3.2 |
-0.0 |
0.0 |
-1.1 |
-0.2 |
-0.2 |
3.8 |
0.4 |
1.0 |
interc |
1.9E+4 |
1.7E+0 |
9.8E-2 |
1.8E+4 |
3.3E+3 |
1.3E+3 |
3.6E+4 |
5.5E+4 |
1.1E+5 |
cps |
1.0E+4 |
1.5E-1 |
5.2E-2 |
1.8E+3 |
1.1E+2 |
1.2E+2 |
7.5E+3 |
1.1E+4 |
5.4E+4 |
rej1 |
  |
  |
  |
17125 |
  |
  |
  |
  |
  |
rej2 |
  |
  |
  |
  |
  |
  |
  |
  |
  |
RATIOS
  |
204/206 |
207/206 |
208/206 |
196/238 |
206/238 |
248/238 |
254/238 |
error +- |
0.000054 |
0.059641 |
0.068947 |
1.342975 |
0.238087 |
1.459196 |
7.162493 |
ratio |
0.000031 |
0.000552 |
0.001325 |
0.006733 |
0.001649 |
0.007020 |
0.029098 |
CALIBRATION
CALIBRATION
Zr20/U=1.3034 Pb/U=0.2257 UO/U=6.9737 (Pb/U=0.00464(UO/U)^2)
REDUCED DATA
  |
rad cor |
+- |
age Ma |
+- |
  |
uncorrected |
  |
  |
  |
  |
  |
Pb206/U238 |
0.0906 |
0.0010 |
558.8919 |
5.7 |
  |
Pb207/Pb206 |
0.0596 |
0.0006 |
590.5647 |
20.0 |
  |
Pb207/U235 |
0.7448 |
0.0112 |
565.1792 |
6.5 |
  |
Pb208/Th232 |
0.0275 |
0.0006 |
548.2089 |
12.4 |
  |
204 corrected |
  |
  |
  |
  |
  |
Pb206/U238 |
0.0905 |
0.0010 |
558.4313 |
5.7 |
  |
Pb207/Pb206 |
0.0589 |
0.0007 |
562.0621 |
26.8 |
  |
Pb207/U235 |
0.7344 |
0.0128 |
559.1472 |
7.4 |
  |
Pb208/Pb206 |
0.0671 |
0.0017 |
  |
  |
  |
Pb208/Th232 |
0.0267 |
0.0008 |
533.1619 |
15.0 |
  |
207 corrected |
  |
  |
  |
  |
  |
Pb206/U238 |
0.0905 |
0.0010 |
558.3733 |
5.7 |
  |
Pb208/Pb206 |
0.0669 |
0.0019 |
  |
  |
  |
Pb208/Th232 |
0.0266 |
0.0008 |
531.2655 |
16.3 |
  |
208 corrected |
  |
  |
  |
  |
  |
Pb206/U238 |
0.0906 |
0.0010 |
559.2299 |
5.7 |
  |
Pb207/Pb206 |
0.0602 |
0.0008 |
611.1229 |
29.6 |
  |
Pb207/U235 |
0.7523 |
0.0139 |
569.5815 |
8.0 |
  |
CONCENTRATIONS
CONCENTRATIONS
U:892.0 ppm Th:202.6 ppm Th/U:0.227 ±0.0 Pb204:3.7 ppb sens 17.0


