SHRIMP II v2 SW v2.13 ACQUISITION DATA PRINTOUT
analyst GSWA, mount G14-21-1,
702-2.1, 2014-08-14, 20:55:12, 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=2076, z=2524
primary beam = -1.8nA
QT1 Y defl = -1741 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 |
195.82464 |
0.00000 |
2.0 |
8.0 |
12 |
YES 3.0 |
REF |
ALW |
COUNTER |
R 1.0E-12 |
2 |
Pb204 |
203.98263 |
0.00000 |
10.0 |
3.0 |
11 |
NO 10.0 |
NONE |
ALW |
COUNTER |
  |
3 |
Bkgrnd |
204.02763 |
0.00000 |
10.0 |
5.0 |
11 |
NO 0.5 |
BAC |
ALW |
COUNTER |
  |
4 |
Pb206 |
205.98857 |
0.00000 |
10.0 |
4.0 |
11 |
YES 6.0 |
REF |
ALW |
COUNTER |
R 1.0E-12 |
5 |
Pb207 |
206.99358 |
0.00000 |
30.0 |
2.0 |
11 |
NO 5.0 |
NONE |
ALW |
COUNTER |
FS+10mV=1Mcps=FIXED As |
6 |
Pb208 |
207.99658 |
0.00000 |
10.0 |
2.0 |
11 |
NO 4.0 |
NONE |
ALW |
COUNTER |
  |
7 |
U238 |
238.07460 |
0.00000 |
5.0 |
3.0 |
10 |
YES 3.0 |
REF |
ALW |
COUNTER |
  |
8 |
ThO248 |
248.05051 |
0.00000 |
5.0 |
3.0 |
9 |
YES 3.0 |
NONE |
ALW |
COUNTER |
  |
9 |
UO254 |
254.05739 |
0.00000 |
2.0 |
3.0 |
9 |
YES 2.0 |
REF |
ALW |
COUNTER |
  |
AMU-B calibration field offset -0.076 G.
DATA
Zr2O |
19396 |
  |
20351 |
  |
20570 |
  |
20748 |
R |
21348 |
R |
21569 |
  |
Pb204 |
2 |
  |
4 |
  |
0 |
  |
0 |
  |
0 |
  |
0 |
  |
Bkgrnd |
1 |
  |
1 |
  |
0 |
  |
1 |
  |
0 |
  |
0 |
  |
Pb206 |
2254 |
  |
2245 |
  |
2214 |
  |
2208 |
  |
2038 |
  |
2143 |
  |
Pb207 |
537 |
  |
523 |
  |
452 |
  |
504 |
  |
520 |
  |
484 |
  |
Pb208 |
1261 |
  |
1297 |
  |
1223 |
  |
1146 |
  |
1134 |
  |
1107 |
R |
U238 |
2672 |
  |
2671 |
  |
2649 |
  |
2695 |
  |
2821 |
  |
2739 |
  |
ThO248 |
29482 |
  |
29673 |
  |
29194 |
  |
29527 |
  |
29147 |
  |
27884 |
R |
UO254 |
7349 |
  |
7275 |
  |
7240 |
  |
7276 |
  |
7140 |
  |
7062 |
  |
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 |
2.4 |
0.3 |
0.1 |
1.6 |
2.2 |
0.8 |
0.9 |
1.6 |
0.3 |
slope |
2.6 |
-0.0 |
-0.0 |
-0.2 |
-0.0 |
-0.2 |
0.2 |
-0.5 |
-0.3 |
interc |
2.0E+4 |
2.7E+0 |
1.1E+0 |
2.3E+3 |
5.2E+2 |
1.3E+3 |
2.6E+3 |
3.0E+4 |
7.4E+3 |
cps |
1.0E+4 |
8.5E-2 |
4.7E-2 |
2.2E+2 |
1.7E+1 |
1.2E+2 |
5.4E+2 |
5.9E+3 |
3.6E+3 |
rej1 |
  |
  |
  |
  |
  |
  |
  |
27884 |
  |
rej2 |
  |
  |
  |
  |
  |
  |
  |
  |
  |
RATIOS
  |
204/206 |
207/206 |
208/206 |
196/238 |
206/238 |
248/238 |
254/238 |
error +- |
0.000174 |
0.076774 |
0.552359 |
19.262543 |
0.404753 |
10.900688 |
6.722421 |
ratio |
0.000174 |
0.002232 |
0.008910 |
0.173420 |
0.005462 |
0.091504 |
0.061854 |
CALIBRATION
CALIBRATION
Zr20/U=1.3034 Pb/U=0.2257 UO/U=6.9737 (Pb/U=0.00896(UO/U)^2)
REDUCED DATA
  |
rad cor |
+- |
age Ma |
+- |
  |
uncorrected |
  |
  |
  |
  |
  |
Pb206/U238 |
0.1748 |
0.0040 |
1038.4202 |
21.8 |
  |
Pb207/Pb206 |
0.0768 |
0.0022 |
1115.3221 |
57.0 |
  |
Pb207/U235 |
1.8502 |
0.0724 |
1063.5006 |
25.5 |
  |
Pb208/Th232 |
0.0541 |
0.0017 |
1065.7480 |
31.7 |
  |
204 corrected |
  |
  |
  |
  |
  |
Pb206/U238 |
0.1743 |
0.0040 |
1035.7561 |
22.0 |
  |
Pb207/Pb206 |
0.0743 |
0.0035 |
1049.8755 |
91.9 |
  |
Pb207/U235 |
1.7858 |
0.0979 |
1040.3052 |
35.1 |
  |
Pb208/Pb206 |
0.5477 |
0.0110 |
  |
  |
  |
Pb208/Th232 |
0.0535 |
0.0018 |
1054.1127 |
33.8 |
  |
207 corrected |
  |
  |
  |
  |
  |
Pb206/U238 |
0.1742 |
0.0040 |
1035.1977 |
21.9 |
  |
Pb208/Pb206 |
0.5467 |
0.0107 |
  |
  |
  |
Pb208/Th232 |
0.0534 |
0.0017 |
1051.6739 |
33.4 |
  |
208 corrected |
  |
  |
  |
  |
  |
Pb206/U238 |
0.1733 |
0.0041 |
1030.1720 |
22.6 |
  |
Pb207/Pb206 |
0.0691 |
0.0068 |
901.7757 |
189.8 |
  |
Pb207/U235 |
1.6510 |
0.1710 |
989.9307 |
63.5 |
  |
CONCENTRATIONS
CONCENTRATIONS
U:59.6 ppm Th:106.3 ppm Th/U:1.783 ±0.0 Pb204:1.6 ppb sens 16.3


