SHRIMP II v2 SW v2.13 ACQUISITION DATA PRINTOUT
analyst GSWA, mount G14-21-1,
506-25.1, 2014-08-15, 05:58:20, 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=7991, y=1499, z=3471
primary beam = -1.9nA
QT1 Y defl = -1733 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 |
195.82587 |
0.00000 |
2.0 |
8.0 |
12 |
YES 3.0 |
REF |
ALW |
COUNTER |
R 1.0E-12 |
2 |
Pb204 |
203.98387 |
0.00000 |
10.0 |
3.0 |
11 |
NO 10.0 |
NONE |
ALW |
COUNTER |
  |
3 |
Bkgrnd |
204.02887 |
0.00000 |
10.0 |
5.0 |
11 |
NO 0.5 |
BAC |
ALW |
COUNTER |
  |
4 |
Pb206 |
205.98947 |
0.00000 |
10.0 |
4.0 |
11 |
YES 6.0 |
REF |
ALW |
COUNTER |
R 1.0E-12 |
5 |
Pb207 |
206.99447 |
0.00000 |
30.0 |
2.0 |
11 |
NO 5.0 |
NONE |
ALW |
COUNTER |
FS+10mV=1Mcps=FIXED As |
6 |
Pb208 |
207.99747 |
0.00000 |
10.0 |
2.0 |
11 |
NO 4.0 |
NONE |
ALW |
COUNTER |
  |
7 |
U238 |
238.07474 |
0.00000 |
5.0 |
3.0 |
10 |
YES 3.0 |
REF |
ALW |
COUNTER |
  |
8 |
ThO248 |
248.05212 |
0.00000 |
5.0 |
3.0 |
9 |
YES 3.0 |
NONE |
ALW |
COUNTER |
  |
9 |
UO254 |
254.05828 |
0.00000 |
2.0 |
3.0 |
9 |
YES 2.0 |
REF |
ALW |
COUNTER |
  |
AMU-B calibration field offset -0.076 G.
DATA
Zr2O |
19283 |
  |
19302 |
  |
20338 |
  |
20617 |
  |
20802 |
  |
21392 |
  |
Pb204 |
1 |
  |
0 |
  |
3 |
  |
4 |
  |
0 |
  |
0 |
  |
Bkgrnd |
0 |
  |
0 |
  |
0 |
  |
2 |
  |
1 |
  |
0 |
  |
Pb206 |
1466 |
R |
1354 |
  |
1385 |
  |
1380 |
  |
1318 |
  |
1277 |
  |
Pb207 |
376 |
  |
331 |
  |
314 |
  |
316 |
  |
340 |
  |
297 |
  |
Pb208 |
593 |
  |
602 |
  |
516 |
  |
556 |
  |
546 |
  |
528 |
  |
U238 |
1296 |
  |
1360 |
  |
1355 |
  |
1356 |
  |
1382 |
  |
1414 |
  |
ThO248 |
12294 |
  |
11895 |
  |
11498 |
  |
11292 |
  |
11246 |
  |
11199 |
  |
UO254 |
3994 |
R |
3858 |
  |
3866 |
  |
3703 |
  |
3641 |
  |
3809 |
  |
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 |
2.8 |
0.8 |
0.3 |
0.9 |
1.4 |
1.4 |
0.3 |
2.7 |
2.4 |
slope |
2.8 |
-0.0 |
0.0 |
-0.2 |
-0.1 |
-0.1 |
0.1 |
-1.4 |
-0.3 |
interc |
1.9E+4 |
1.6E+0 |
9.7E-2 |
1.5E+3 |
3.6E+2 |
6.0E+2 |
1.3E+3 |
1.2E+4 |
4.0E+3 |
cps |
1.0E+4 |
1.3E-1 |
5.2E-2 |
1.4E+2 |
1.1E+1 |
5.6E+1 |
2.7E+2 |
2.3E+3 |
1.9E+3 |
rej1 |
  |
  |
  |
  |
  |
  |
  |
  |
  |
rej2 |
  |
  |
  |
  |
  |
  |
  |
  |
  |
RATIOS
  |
204/206 |
207/206 |
208/206 |
196/238 |
206/238 |
248/238 |
254/238 |
error +- |
0.000578 |
0.080484 |
0.411056 |
37.752291 |
0.504110 |
8.639368 |
7.100958 |
ratio |
0.000384 |
0.002296 |
0.009631 |
0.455698 |
0.007891 |
0.109616 |
0.107056 |
CALIBRATION
CALIBRATION
Zr20/U=1.3034 Pb/U=0.2257 UO/U=6.9737 (Pb/U=0.01000(UO/U)^2)
REDUCED DATA
  |
rad cor |
+- |
age Ma |
+- |
  |
uncorrected |
  |
  |
  |
  |
  |
Pb206/U238 |
0.1951 |
0.0066 |
1148.9401 |
35.7 |
  |
Pb207/Pb206 |
0.0805 |
0.0023 |
1208.8695 |
55.2 |
  |
Pb207/U235 |
2.1650 |
0.1018 |
1169.8893 |
32.1 |
  |
Pb208/Th232 |
0.0592 |
0.0027 |
1163.2440 |
51.6 |
  |
204 corrected |
  |
  |
  |
  |
  |
Pb206/U238 |
0.1933 |
0.0067 |
1139.1930 |
36.0 |
  |
Pb207/Pb206 |
0.0723 |
0.0064 |
993.0200 |
169.8 |
  |
Pb207/U235 |
1.9256 |
0.1901 |
1090.0086 |
63.9 |
  |
Pb208/Pb206 |
0.3941 |
0.0171 |
  |
  |
  |
Pb208/Th232 |
0.0563 |
0.0033 |
1106.4459 |
63.2 |
  |
207 corrected |
  |
  |
  |
  |
  |
Pb206/U238 |
0.1945 |
0.0066 |
1145.6246 |
35.7 |
  |
Pb208/Pb206 |
0.4053 |
0.0113 |
  |
  |
  |
Pb208/Th232 |
0.0582 |
0.0028 |
1143.9325 |
53.6 |
  |
208 corrected |
  |
  |
  |
  |
  |
Pb206/U238 |
0.1945 |
0.0067 |
1145.9372 |
36.3 |
  |
Pb207/Pb206 |
0.0780 |
0.0070 |
1145.9166 |
169.3 |
  |
Pb207/U235 |
2.0912 |
0.2101 |
1145.9301 |
66.8 |
  |
CONCENTRATIONS
CONCENTRATIONS
U:31.6 ppm Th:42.7 ppm Th/U:1.354 ±0.0 Pb204:3.1 ppb sens 16.5


