SHRIMP II v2 SW v2.13 ACQUISITION DATA PRINTOUT
analyst GSWA, mount G14-21-1,
506-26.1, 2014-08-15, 06:18:26, 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=1239, z=3574
primary beam = -1.9nA
QT1 Y defl = -1721 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 |
195.82432 |
0.00000 |
2.0 |
8.0 |
12 |
YES 3.0 |
REF |
ALW |
COUNTER |
R 1.0E-12 |
2 |
Pb204 |
203.98232 |
0.00000 |
10.0 |
3.0 |
11 |
NO 10.0 |
NONE |
ALW |
COUNTER |
  |
3 |
Bkgrnd |
204.02732 |
0.00000 |
10.0 |
5.0 |
11 |
NO 0.5 |
BAC |
ALW |
COUNTER |
  |
4 |
Pb206 |
205.98803 |
0.00000 |
10.0 |
4.0 |
11 |
YES 6.0 |
REF |
ALW |
COUNTER |
R 1.0E-12 |
5 |
Pb207 |
206.99303 |
0.00000 |
30.0 |
2.0 |
11 |
NO 5.0 |
NONE |
ALW |
COUNTER |
FS+10mV=1Mcps=FIXED As |
6 |
Pb208 |
207.99603 |
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 |
248.04958 |
0.00000 |
5.0 |
3.0 |
9 |
YES 3.0 |
NONE |
ALW |
COUNTER |
  |
9 |
UO254 |
254.05631 |
0.00000 |
2.0 |
3.0 |
9 |
YES 2.0 |
REF |
ALW |
COUNTER |
  |
AMU-B calibration field offset -0.076 G.
DATA
Zr2O |
19697 |
  |
20128 |
  |
20730 |
  |
20967 |
  |
21909 |
  |
21861 |
  |
Pb204 |
1 |
  |
2 |
  |
2 |
  |
2 |
  |
1 |
  |
2 |
  |
Bkgrnd |
1 |
  |
1 |
  |
1 |
  |
1 |
  |
0 |
  |
0 |
  |
Pb206 |
2528 |
  |
2473 |
  |
2478 |
  |
2390 |
  |
2479 |
  |
2291 |
  |
Pb207 |
656 |
  |
614 |
  |
557 |
  |
557 |
  |
593 |
  |
558 |
  |
Pb208 |
1001 |
  |
1011 |
  |
998 |
  |
943 |
  |
940 |
  |
901 |
  |
U238 |
2288 |
  |
2302 |
  |
2438 |
  |
2482 |
  |
2427 |
  |
2459 |
  |
ThO248 |
20262 |
  |
20239 |
  |
20310 |
  |
20947 |
  |
20576 |
  |
20871 |
R |
UO254 |
6974 |
  |
6910 |
  |
6718 |
  |
6802 |
  |
6814 |
  |
6700 |
  |
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 |
2.0 |
0.3 |
0.1 |
1.4 |
1.6 |
0.3 |
1.2 |
2.2 |
0.8 |
slope |
3.0 |
0.0 |
-0.0 |
-0.2 |
-0.1 |
-0.1 |
0.2 |
0.9 |
-0.3 |
interc |
2.0E+4 |
1.5E+0 |
1.3E+0 |
2.5E+3 |
6.4E+2 |
1.0E+3 |
2.3E+3 |
2.0E+4 |
7.0E+3 |
cps |
1.1E+4 |
1.7E-1 |
6.4E-2 |
2.4E+2 |
2.0E+1 |
9.7E+1 |
4.8E+2 |
4.1E+3 |
3.4E+3 |
rej1 |
  |
  |
  |
  |
  |
  |
  |
  |
  |
rej2 |
  |
  |
  |
  |
  |
  |
  |
  |
  |
RATIOS
  |
204/206 |
207/206 |
208/206 |
196/238 |
206/238 |
248/238 |
254/238 |
error +- |
0.000427 |
0.080593 |
0.398383 |
22.049588 |
0.511811 |
8.585832 |
7.180396 |
ratio |
0.000266 |
0.001906 |
0.006566 |
0.217328 |
0.006863 |
0.085394 |
0.073771 |
CALIBRATION
CALIBRATION
Zr20/U=1.3034 Pb/U=0.2257 UO/U=6.9737 (Pb/U=0.00993(UO/U)^2)
REDUCED DATA
  |
rad cor |
+- |
age Ma |
+- |
  |
uncorrected |
  |
  |
  |
  |
  |
Pb206/U238 |
0.1937 |
0.0048 |
1141.5022 |
25.6 |
  |
Pb207/Pb206 |
0.0806 |
0.0019 |
1211.5402 |
45.8 |
  |
Pb207/U235 |
2.1527 |
0.0778 |
1165.9117 |
24.8 |
  |
Pb208/Th232 |
0.0579 |
0.0019 |
1136.9515 |
36.3 |
  |
204 corrected |
  |
  |
  |
  |
  |
Pb206/U238 |
0.1924 |
0.0048 |
1134.3467 |
25.9 |
  |
Pb207/Pb206 |
0.0745 |
0.0045 |
1055.7904 |
118.2 |
  |
Pb207/U235 |
1.9770 |
0.1358 |
1107.7134 |
45.3 |
  |
Pb208/Pb206 |
0.3858 |
0.0117 |
  |
  |
  |
Pb208/Th232 |
0.0557 |
0.0023 |
1094.6303 |
44.5 |
  |
207 corrected |
  |
  |
  |
  |
  |
Pb206/U238 |
0.1930 |
0.0048 |
1137.8540 |
25.6 |
  |
Pb208/Pb206 |
0.3920 |
0.0082 |
  |
  |
  |
Pb208/Th232 |
0.0567 |
0.0020 |
1115.3793 |
38.3 |
  |
208 corrected |
  |
  |
  |
  |
  |
Pb206/U238 |
0.1939 |
0.0048 |
1142.4405 |
26.1 |
  |
Pb207/Pb206 |
0.0814 |
0.0050 |
1230.7034 |
115.5 |
  |
Pb207/U235 |
2.1757 |
0.1498 |
1173.3059 |
46.8 |
  |
CONCENTRATIONS
CONCENTRATIONS
U:54.4 ppm Th:72.6 ppm Th/U:1.334 ±0.0 Pb204:3.9 ppb sens 17.3


