SHRIMP II v2 SW v2.13 ACQUISITION DATA PRINTOUT
analyst GSWA, mount G14-21-1,
702-10.1, 2014-08-15, 04:57:22, 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=7985, y=2193, z=2838
primary beam = -1.9nA
QT1 Y defl = -1739 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 |
195.82397 |
0.00000 |
2.0 |
8.0 |
12 |
YES 3.0 |
REF |
ALW |
COUNTER |
R 1.0E-12 |
2 |
Pb204 |
203.98197 |
0.00000 |
10.0 |
3.0 |
11 |
NO 10.0 |
NONE |
ALW |
COUNTER |
  |
3 |
Bkgrnd |
204.02697 |
0.00000 |
10.0 |
5.0 |
11 |
NO 0.5 |
BAC |
ALW |
COUNTER |
  |
4 |
Pb206 |
205.98757 |
0.00000 |
10.0 |
4.0 |
11 |
YES 6.0 |
REF |
ALW |
COUNTER |
R 1.0E-12 |
5 |
Pb207 |
206.99257 |
0.00000 |
30.0 |
2.0 |
11 |
NO 5.0 |
NONE |
ALW |
COUNTER |
FS+10mV=1Mcps=FIXED As |
6 |
Pb208 |
207.99557 |
0.00000 |
10.0 |
2.0 |
11 |
NO 4.0 |
NONE |
ALW |
COUNTER |
  |
7 |
U238 |
238.07341 |
0.00000 |
5.0 |
3.0 |
10 |
YES 3.0 |
REF |
ALW |
COUNTER |
  |
8 |
ThO248 |
248.04967 |
0.00000 |
5.0 |
3.0 |
9 |
YES 3.0 |
NONE |
ALW |
COUNTER |
  |
9 |
UO254 |
254.05708 |
0.00000 |
2.0 |
3.0 |
9 |
YES 2.0 |
REF |
ALW |
COUNTER |
  |
AMU-B calibration field offset -0.076 G.
DATA
Zr2O |
18508 |
R |
19088 |
  |
19612 |
  |
20172 |
  |
20353 |
  |
20607 |
  |
Pb204 |
2 |
  |
1 |
  |
0 |
  |
0 |
  |
0 |
  |
0 |
  |
Bkgrnd |
2 |
  |
0 |
  |
2 |
  |
0 |
  |
1 |
  |
0 |
  |
Pb206 |
2235 |
  |
2314 |
  |
2347 |
  |
2303 |
  |
2334 |
  |
2317 |
  |
Pb207 |
522 |
  |
544 |
  |
556 |
  |
531 |
  |
552 |
  |
547 |
  |
Pb208 |
1121 |
  |
1215 |
  |
1195 |
  |
1284 |
  |
1254 |
  |
1281 |
  |
U238 |
2242 |
  |
2465 |
  |
2492 |
  |
2579 |
  |
2541 |
  |
2753 |
  |
ThO248 |
26752 |
  |
28909 |
  |
28791 |
  |
29941 |
  |
29535 |
  |
31243 |
  |
UO254 |
6921 |
  |
7121 |
  |
7010 |
  |
7253 |
  |
7412 |
  |
7668 |
  |
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 |
1.5 |
0.0 |
0.2 |
0.6 |
0.3 |
1.0 |
2.2 |
1.9 |
1.6 |
slope |
2.8 |
-0.0 |
-0.0 |
0.1 |
0.0 |
0.2 |
0.5 |
5.9 |
0.9 |
interc |
1.9E+4 |
1.5E+0 |
1.6E+0 |
2.3E+3 |
5.3E+2 |
1.1E+3 |
2.2E+3 |
2.6E+4 |
6.7E+3 |
cps |
9.9E+3 |
4.1E-2 |
8.0E-2 |
2.3E+2 |
1.8E+1 |
1.2E+2 |
5.0E+2 |
5.7E+3 |
3.6E+3 |
rej1 |
  |
  |
  |
  |
  |
  |
  |
28909 |
  |
rej2 |
  |
  |
  |
  |
  |
  |
  |
29535 |
  |
RATIOS
  |
204/206 |
207/206 |
208/206 |
196/238 |
206/238 |
248/238 |
254/238 |
error +- |
-0.000168 |
0.077870 |
0.526650 |
20.035907 |
0.465757 |
11.588507 |
7.216091 |
ratio |
-0.000237 |
0.001520 |
0.007607 |
0.250203 |
0.006834 |
0.143626 |
0.096625 |
CALIBRATION
CALIBRATION
Zr20/U=1.3034 Pb/U=0.2257 UO/U=6.9737 (Pb/U=0.00894(UO/U)^2)
REDUCED DATA
  |
rad cor |
+- |
age Ma |
+- |
  |
uncorrected |
  |
  |
  |
  |
  |
Pb206/U238 |
0.1745 |
0.0053 |
1037.1313 |
29.2 |
  |
Pb207/Pb206 |
0.0779 |
0.0015 |
1143.5474 |
38.3 |
  |
Pb207/U235 |
1.8741 |
0.0717 |
1071.9737 |
25.0 |
  |
Pb208/Th232 |
0.0513 |
0.0020 |
1010.4303 |
37.8 |
  |
204 corrected |
  |
  |
  |
  |
  |
Pb206/U238 |
0.1750 |
0.0054 |
1039.7001 |
29.5 |
  |
Pb207/Pb206 |
0.0802 |
0.0040 |
1202.7433 |
94.3 |
  |
Pb207/U235 |
1.9362 |
0.1187 |
1093.6728 |
40.3 |
  |
Pb208/Pb206 |
0.5312 |
0.0115 |
  |
  |
  |
Pb208/Th232 |
0.0518 |
0.0022 |
1021.6123 |
41.6 |
  |
207 corrected |
  |
  |
  |
  |
  |
Pb206/U238 |
0.1738 |
0.0053 |
1032.8848 |
29.1 |
  |
Pb208/Pb206 |
0.5191 |
0.0086 |
  |
  |
  |
Pb208/Th232 |
0.0503 |
0.0020 |
991.9414 |
38.0 |
  |
208 corrected |
  |
  |
  |
  |
  |
Pb206/U238 |
0.1760 |
0.0055 |
1045.2311 |
30.2 |
  |
Pb207/Pb206 |
0.0853 |
0.0073 |
1322.0272 |
156.6 |
  |
Pb207/U235 |
2.0699 |
0.1953 |
1138.9040 |
62.6 |
  |
CONCENTRATIONS
CONCENTRATIONS
U:60.1 ppm Th:107.7 ppm Th/U:1.793 ±0.0 Pb204:-1.5 ppb sens 16.6


