SHRIMP II v2 SW v2.13 ACQUISITION DATA PRINTOUT
analyst GSWA, mount G14-21-1,
506-22.1, 2014-08-15, 02:35:27, 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=1383, z=3426
primary beam = -1.9nA
QT1 Y defl = -1745 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 |
195.82522 |
0.00000 |
2.0 |
8.0 |
12 |
YES 3.0 |
REF |
ALW |
COUNTER |
R 1.0E-12 |
2 |
Pb204 |
203.98322 |
0.00000 |
10.0 |
3.0 |
11 |
NO 10.0 |
NONE |
ALW |
COUNTER |
  |
3 |
Bkgrnd |
204.02822 |
0.00000 |
10.0 |
5.0 |
11 |
NO 0.5 |
BAC |
ALW |
COUNTER |
  |
4 |
Pb206 |
205.98818 |
0.00000 |
10.0 |
4.0 |
11 |
YES 6.0 |
REF |
ALW |
COUNTER |
R 1.0E-12 |
5 |
Pb207 |
206.99318 |
0.00000 |
30.0 |
2.0 |
11 |
NO 5.0 |
NONE |
ALW |
COUNTER |
FS+10mV=1Mcps=FIXED As |
6 |
Pb208 |
207.99618 |
0.00000 |
10.0 |
2.0 |
11 |
NO 4.0 |
NONE |
ALW |
COUNTER |
  |
7 |
U238 |
238.07493 |
0.00000 |
5.0 |
3.0 |
10 |
YES 3.0 |
REF |
ALW |
COUNTER |
  |
8 |
ThO248 |
248.05064 |
0.00000 |
5.0 |
3.0 |
9 |
YES 3.0 |
NONE |
ALW |
COUNTER |
  |
9 |
UO254 |
254.05730 |
0.00000 |
2.0 |
3.0 |
9 |
YES 2.0 |
REF |
ALW |
COUNTER |
  |
AMU-B calibration field offset -0.076 G.
DATA
Zr2O |
18657 |
  |
20033 |
  |
20194 |
  |
20534 |
  |
20777 |
  |
21196 |
  |
Pb204 |
0 |
  |
3 |
  |
0 |
  |
1 |
  |
5 |
  |
1 |
  |
Bkgrnd |
0 |
  |
1 |
  |
0 |
  |
2 |
  |
0 |
  |
2 |
  |
Pb206 |
1736 |
  |
1687 |
  |
1646 |
  |
1598 |
  |
1725 |
  |
1566 |
  |
Pb207 |
453 |
  |
406 |
  |
417 |
  |
401 |
  |
386 |
  |
426 |
  |
Pb208 |
834 |
  |
769 |
  |
757 |
  |
752 |
  |
723 |
  |
734 |
  |
U238 |
1563 |
  |
1617 |
  |
1604 |
  |
1637 |
  |
1675 |
  |
1675 |
  |
ThO248 |
15903 |
  |
15759 |
  |
15523 |
  |
15518 |
  |
15525 |
  |
15362 |
  |
UO254 |
4641 |
  |
4494 |
  |
4584 |
  |
4448 |
  |
4518 |
  |
4462 |
  |
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 |
0.3 |
1.4 |
0.2 |
2.2 |
1.2 |
0.6 |
0.2 |
0.4 |
0.8 |
slope |
1.9 |
0.0 |
0.0 |
-0.1 |
-0.0 |
-0.1 |
0.1 |
-0.6 |
-0.2 |
interc |
2.0E+4 |
7.4E-1 |
1.1E-1 |
1.7E+3 |
4.3E+2 |
8.2E+2 |
1.6E+3 |
1.6E+4 |
4.6E+3 |
cps |
1.0E+4 |
1.7E-1 |
8.7E-2 |
1.7E+2 |
1.4E+1 |
7.7E+1 |
3.2E+2 |
3.1E+3 |
2.3E+3 |
rej1 |
18657 |
  |
  |
  |
  |
  |
  |
  |
  |
rej2 |
  |
  |
  |
  |
  |
  |
  |
  |
  |
RATIOS
  |
204/206 |
207/206 |
208/206 |
196/238 |
206/238 |
248/238 |
254/238 |
error +- |
0.000530 |
0.083021 |
0.461946 |
31.642591 |
0.512509 |
9.667027 |
7.012373 |
ratio |
0.000467 |
0.002221 |
0.009702 |
0.332984 |
0.009226 |
0.102847 |
0.082781 |
CALIBRATION
CALIBRATION
Zr20/U=1.3034 Pb/U=0.2257 UO/U=6.9737 (Pb/U=0.01042(UO/U)^2)
REDUCED DATA
  |
rad cor |
+- |
age Ma |
+- |
  |
uncorrected |
  |
  |
  |
  |
  |
Pb206/U238 |
0.2034 |
0.0060 |
1193.5222 |
32.3 |
  |
Pb207/Pb206 |
0.0830 |
0.0022 |
1269.7070 |
51.3 |
  |
Pb207/U235 |
2.3282 |
0.0987 |
1220.9361 |
29.7 |
  |
Pb208/Th232 |
0.0614 |
0.0024 |
1204.8176 |
46.4 |
  |
204 corrected |
  |
  |
  |
  |
  |
Pb206/U238 |
0.2017 |
0.0062 |
1184.2717 |
33.1 |
  |
Pb207/Pb206 |
0.0755 |
0.0076 |
1081.8815 |
189.0 |
  |
Pb207/U235 |
2.0994 |
0.2277 |
1148.6055 |
72.0 |
  |
Pb208/Pb206 |
0.4468 |
0.0197 |
  |
  |
  |
Pb208/Th232 |
0.0589 |
0.0033 |
1156.8902 |
62.9 |
  |
207 corrected |
  |
  |
  |
  |
  |
Pb206/U238 |
0.2026 |
0.0060 |
1189.1560 |
32.3 |
  |
Pb208/Pb206 |
0.4548 |
0.0113 |
  |
  |
  |
Pb208/Th232 |
0.0602 |
0.0025 |
1182.2014 |
48.1 |
  |
208 corrected |
  |
  |
  |
  |
  |
Pb206/U238 |
0.2029 |
0.0062 |
1190.7778 |
33.0 |
  |
Pb207/Pb206 |
0.0808 |
0.0070 |
1216.6395 |
161.1 |
  |
Pb207/U235 |
2.2603 |
0.2150 |
1199.9990 |
64.8 |
  |
CONCENTRATIONS
CONCENTRATIONS
U:37.3 ppm Th:57.1 ppm Th/U:1.530 ±0.0 Pb204:3.5 ppb sens 16.4


