SHRIMP II v2 SW v2.13 ACQUISITION DATA PRINTOUT
analyst GSWA, mount G14-21-1,
BRB-12.1, 2014-08-15, 07:20:09, 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=1859, z=3742
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 |
195.82383 |
0.00000 |
2.0 |
8.0 |
12 |
YES 3.0 |
REF |
ALW |
COUNTER |
R 1.0E-12 |
2 |
Pb204 |
203.98183 |
0.00000 |
10.0 |
3.0 |
11 |
NO 10.0 |
NONE |
ALW |
COUNTER |
  |
3 |
Bkgrnd |
204.02683 |
0.00000 |
10.0 |
5.0 |
11 |
NO 0.5 |
BAC |
ALW |
COUNTER |
  |
4 |
Pb206 |
205.98735 |
0.00000 |
10.0 |
4.0 |
11 |
YES 6.0 |
REF |
ALW |
COUNTER |
R 1.0E-12 |
5 |
Pb207 |
206.99235 |
0.00000 |
30.0 |
2.0 |
11 |
NO 5.0 |
NONE |
ALW |
COUNTER |
FS+10mV=1Mcps=FIXED As |
6 |
Pb208 |
207.99535 |
0.00000 |
10.0 |
2.0 |
11 |
NO 4.0 |
NONE |
ALW |
COUNTER |
  |
7 |
U238 |
238.07349 |
0.00000 |
5.0 |
3.0 |
10 |
YES 3.0 |
REF |
ALW |
COUNTER |
  |
8 |
ThO248 |
248.05044 |
0.00000 |
5.0 |
3.0 |
9 |
YES 3.0 |
NONE |
ALW |
COUNTER |
  |
9 |
UO254 |
254.05647 |
0.00000 |
2.0 |
3.0 |
9 |
YES 2.0 |
REF |
ALW |
COUNTER |
  |
AMU-B calibration field offset -0.076 G.
DATA
Zr2O |
19986 |
  |
20272 |
  |
21261 |
  |
21705 |
  |
22146 |
R |
22164 |
  |
Pb204 |
2 |
  |
1 |
  |
2 |
  |
3 |
  |
3 |
  |
0 |
  |
Bkgrnd |
0 |
  |
3 |
  |
0 |
  |
1 |
  |
1 |
  |
1 |
  |
Pb206 |
20415 |
  |
20225 |
  |
19446 |
  |
19356 |
R |
19185 |
  |
18962 |
  |
Pb207 |
3638 |
R |
3506 |
  |
3374 |
  |
3425 |
  |
3417 |
  |
3404 |
  |
Pb208 |
1384 |
  |
1398 |
  |
1353 |
  |
1339 |
  |
1322 |
R |
1290 |
  |
U238 |
40071 |
  |
41545 |
  |
42186 |
  |
42710 |
  |
42956 |
  |
43510 |
  |
ThO248 |
60264 |
  |
59906 |
  |
59539 |
  |
60925 |
  |
60162 |
  |
61013 |
  |
UO254 |
118404 |
R |
118397 |
  |
118057 |
  |
119677 |
  |
118562 |
  |
119717 |
  |
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 |
3.4 |
0.5 |
0.3 |
1.9 |
1.4 |
0.1 |
3.7 |
3.3 |
3.1 |
slope |
3.2 |
-0.0 |
-0.0 |
-1.9 |
-0.3 |
-0.1 |
4.1 |
0.9 |
1.6 |
interc |
2.0E+4 |
2.1E+0 |
1.0E+0 |
2.0E+4 |
3.6E+3 |
1.4E+3 |
4.0E+4 |
6.0E+4 |
1.2E+5 |
cps |
1.1E+4 |
1.8E-1 |
1.0E-1 |
2.0E+3 |
1.2E+2 |
1.4E+2 |
8.4E+3 |
1.2E+4 |
5.9E+4 |
rej1 |
  |
  |
  |
  |
  |
  |
  |
59539 |
  |
rej2 |
  |
  |
  |
  |
  |
  |
  |
  |
  |
RATIOS
  |
204/206 |
207/206 |
208/206 |
196/238 |
206/238 |
248/238 |
254/238 |
error +- |
0.000042 |
0.058909 |
0.069028 |
1.277004 |
0.233946 |
1.440824 |
7.080469 |
ratio |
0.000034 |
0.000547 |
0.000818 |
0.008231 |
0.001306 |
0.007036 |
0.030937 |
CALIBRATION
CALIBRATION
Zr20/U=1.3034 Pb/U=0.2257 UO/U=6.9737 (Pb/U=0.00467(UO/U)^2)
REDUCED DATA
  |
rad cor |
+- |
age Ma |
+- |
  |
uncorrected |
  |
  |
  |
  |
  |
Pb206/U238 |
0.0911 |
0.0009 |
561.8383 |
5.6 |
  |
Pb207/Pb206 |
0.0589 |
0.0005 |
563.7300 |
20.1 |
  |
Pb207/U235 |
0.7397 |
0.0109 |
562.2130 |
6.3 |
  |
Pb208/Th232 |
0.0278 |
0.0005 |
553.8326 |
9.3 |
  |
204 corrected |
  |
  |
  |
  |
  |
Pb206/U238 |
0.0910 |
0.0009 |
561.4809 |
5.6 |
  |
Pb207/Pb206 |
0.0583 |
0.0008 |
541.3876 |
28.2 |
  |
Pb207/U235 |
0.7317 |
0.0129 |
557.5214 |
7.5 |
  |
Pb208/Pb206 |
0.0676 |
0.0015 |
  |
  |
  |
Pb208/Th232 |
0.0272 |
0.0007 |
542.1167 |
13.4 |
  |
207 corrected |
  |
  |
  |
  |
  |
Pb206/U238 |
0.0911 |
0.0009 |
561.8020 |
5.6 |
  |
Pb208/Pb206 |
0.0689 |
0.0016 |
  |
  |
  |
Pb208/Th232 |
0.0277 |
0.0007 |
552.6454 |
14.2 |
  |
208 corrected |
  |
  |
  |
  |
  |
Pb206/U238 |
0.0911 |
0.0009 |
562.0904 |
5.6 |
  |
Pb207/Pb206 |
0.0593 |
0.0007 |
579.2958 |
25.0 |
  |
Pb207/U235 |
0.7453 |
0.0123 |
565.5115 |
7.1 |
  |
CONCENTRATIONS
CONCENTRATIONS
U:931.0 ppm Th:210.7 ppm Th/U:0.226 ±0.0 Pb204:3.0 ppb sens 17.2


