SHRIMP II v2 SW v2.13 ACQUISITION DATA PRINTOUT
analyst GSWA, mount G14-21-1,
OGC-5.1, 2014-08-15, 00:13:20, 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=1865, z=2699
primary beam = -1.9nA
QT1 Y defl = -1688 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 |
195.82534 |
0.00000 |
2.0 |
8.0 |
12 |
YES 3.0 |
REF |
ALW |
COUNTER |
R 1.0E-12 |
2 |
Pb204 |
203.98334 |
0.00000 |
10.0 |
3.0 |
11 |
NO 10.0 |
NONE |
ALW |
COUNTER |
  |
3 |
Bkgrnd |
204.02834 |
0.00000 |
10.0 |
5.0 |
11 |
NO 0.5 |
BAC |
ALW |
COUNTER |
  |
4 |
Pb206 |
205.98944 |
0.00000 |
10.0 |
4.0 |
11 |
YES 6.0 |
REF |
ALW |
COUNTER |
R 1.0E-12 |
5 |
Pb207 |
206.99445 |
0.00000 |
30.0 |
2.0 |
11 |
NO 5.0 |
NONE |
ALW |
COUNTER |
FS+10mV=1Mcps=FIXED As |
6 |
Pb208 |
207.99745 |
0.00000 |
10.0 |
2.0 |
11 |
NO 4.0 |
NONE |
ALW |
COUNTER |
  |
7 |
U238 |
238.07526 |
0.00000 |
5.0 |
3.0 |
10 |
YES 3.0 |
REF |
ALW |
COUNTER |
  |
8 |
ThO248 |
248.05261 |
0.00000 |
5.0 |
3.0 |
9 |
YES 3.0 |
NONE |
ALW |
COUNTER |
  |
9 |
UO254 |
254.05815 |
0.00000 |
2.0 |
3.0 |
9 |
YES 2.0 |
REF |
ALW |
COUNTER |
  |
AMU-B calibration field offset -0.076 G.
DATA
Zr2O |
19058 |
  |
19630 |
  |
20572 |
  |
20729 |
  |
21433 |
  |
21559 |
  |
Pb204 |
4 |
  |
1 |
  |
2 |
  |
2 |
  |
2 |
  |
1 |
  |
Bkgrnd |
3 |
  |
0 |
  |
3 |
  |
0 |
  |
2 |
  |
2 |
  |
Pb206 |
32204 |
  |
31649 |
  |
31218 |
  |
30607 |
  |
30359 |
  |
29978 |
  |
Pb207 |
29043 |
  |
27932 |
  |
28037 |
  |
27423 |
  |
27466 |
  |
27073 |
  |
Pb208 |
7107 |
  |
7060 |
  |
6971 |
  |
6902 |
  |
6737 |
  |
6878 |
  |
U238 |
8263 |
  |
8712 |
  |
8669 |
  |
8807 |
  |
8941 |
  |
8849 |
R |
ThO248 |
48185 |
  |
48563 |
  |
47994 |
  |
48419 |
  |
48773 |
  |
48457 |
  |
UO254 |
24225 |
  |
24474 |
  |
24101 |
R |
24293 |
  |
24406 |
  |
24429 |
  |
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 |
2.7 |
0.7 |
0.3 |
0.4 |
3.4 |
0.8 |
2.4 |
1.5 |
0.9 |
slope |
3.4 |
-0.0 |
-0.0 |
-2.9 |
-2.2 |
-0.4 |
0.7 |
0.4 |
0.2 |
interc |
1.9E+4 |
2.9E+0 |
1.8E+0 |
3.2E+4 |
2.9E+4 |
7.1E+3 |
8.3E+3 |
4.8E+4 |
2.4E+4 |
cps |
1.0E+4 |
1.9E-1 |
1.7E-1 |
3.1E+3 |
9.3E+2 |
7.0E+2 |
1.7E+3 |
9.7E+3 |
1.2E+4 |
rej1 |
  |
  |
  |
  |
  |
  |
  |
  |
  |
rej2 |
  |
  |
  |
  |
  |
  |
  |
  |
  |
RATIOS
  |
204/206 |
207/206 |
208/206 |
196/238 |
206/238 |
248/238 |
254/238 |
error +- |
0.000008 |
0.299708 |
0.224471 |
5.961489 |
1.790284 |
5.584307 |
7.015893 |
ratio |
0.000020 |
0.001524 |
0.001217 |
0.049035 |
0.012809 |
0.039922 |
0.050917 |
CALIBRATION
CALIBRATION
Zr20/U=1.3034 Pb/U=0.2257 UO/U=6.9737 (Pb/U=0.03637(UO/U)^2)
REDUCED DATA
  |
rad cor |
+- |
age Ma |
+- |
  |
uncorrected |
  |
  |
  |
  |
  |
Pb206/U238 |
0.7098 |
0.0115 |
3457.6094 |
43.2 |
  |
Pb207/Pb206 |
0.2997 |
0.0015 |
3468.7134 |
7.9 |
  |
Pb207/U235 |
29.3305 |
0.5150 |
3464.6438 |
17.1 |
  |
Pb208/Th232 |
0.1804 |
0.0036 |
3351.7435 |
61.3 |
  |
204 corrected |
  |
  |
  |
  |
  |
Pb206/U238 |
0.7097 |
0.0115 |
3457.2488 |
43.2 |
  |
Pb207/Pb206 |
0.2996 |
0.0016 |
3468.2520 |
8.0 |
  |
Pb207/U235 |
29.3178 |
0.5162 |
3464.2190 |
17.1 |
  |
Pb208/Pb206 |
0.2242 |
0.0014 |
  |
  |
  |
Pb208/Th232 |
0.1801 |
0.0036 |
3347.6107 |
62.0 |
  |
207 corrected |
  |
  |
  |
  |
  |
Pb206/U238 |
0.7074 |
0.0116 |
3448.7049 |
43.5 |
  |
Pb208/Pb206 |
0.2178 |
0.0053 |
  |
  |
  |
Pb208/Th232 |
0.1744 |
0.0054 |
3249.5274 |
92.9 |
  |
208 corrected |
  |
  |
  |
  |
  |
Pb206/U238 |
0.7125 |
0.0116 |
3467.9422 |
43.4 |
  |
Pb207/Pb206 |
0.3023 |
0.0020 |
3481.8251 |
10.4 |
  |
Pb207/U235 |
29.6942 |
0.5443 |
3476.7479 |
17.8 |
  |
CONCENTRATIONS
CONCENTRATIONS
U:198.2 ppm Th:175.1 ppm Th/U:0.883 ±0.0 Pb204:1.0 ppb sens 16.8


