SHRIMP II v2 SW v2.13 ACQUISITION DATA PRINTOUT
analyst GSWA, mount G14-21-1,
702-4.1, 2014-08-14, 21:36:37, 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=2093, z=2658
primary beam = -1.8nA
QT1 Y defl = -1750 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 |
195.82585 |
0.00000 |
2.0 |
8.0 |
12 |
YES 3.0 |
REF |
ALW |
COUNTER |
R 1.0E-12 |
2 |
Pb204 |
203.98385 |
0.00000 |
10.0 |
3.0 |
11 |
NO 10.0 |
NONE |
ALW |
COUNTER |
  |
3 |
Bkgrnd |
204.02885 |
0.00000 |
10.0 |
5.0 |
11 |
NO 0.5 |
BAC |
ALW |
COUNTER |
  |
4 |
Pb206 |
205.98894 |
0.00000 |
10.0 |
4.0 |
11 |
YES 6.0 |
REF |
ALW |
COUNTER |
R 1.0E-12 |
5 |
Pb207 |
206.99394 |
0.00000 |
30.0 |
2.0 |
11 |
NO 5.0 |
NONE |
ALW |
COUNTER |
FS+10mV=1Mcps=FIXED As |
6 |
Pb208 |
207.99694 |
0.00000 |
10.0 |
2.0 |
11 |
NO 4.0 |
NONE |
ALW |
COUNTER |
  |
7 |
U238 |
238.07654 |
0.00000 |
5.0 |
3.0 |
10 |
YES 3.0 |
REF |
ALW |
COUNTER |
  |
8 |
ThO248 |
248.05261 |
0.00000 |
5.0 |
3.0 |
9 |
YES 3.0 |
NONE |
ALW |
COUNTER |
  |
9 |
UO254 |
254.05878 |
0.00000 |
2.0 |
3.0 |
9 |
YES 2.0 |
REF |
ALW |
COUNTER |
  |
AMU-B calibration field offset -0.076 G.
DATA
Zr2O |
17866 |
  |
17877 |
  |
18724 |
  |
19100 |
  |
19339 |
  |
19530 |
  |
Pb204 |
0 |
  |
0 |
  |
3 |
  |
0 |
  |
0 |
  |
1 |
  |
Bkgrnd |
0 |
  |
1 |
  |
0 |
  |
1 |
  |
0 |
  |
0 |
  |
Pb206 |
1012 |
  |
1062 |
  |
1057 |
  |
960 |
  |
1004 |
  |
1003 |
  |
Pb207 |
256 |
  |
228 |
  |
240 |
  |
230 |
  |
268 |
  |
221 |
  |
Pb208 |
371 |
  |
359 |
  |
383 |
  |
375 |
  |
350 |
  |
373 |
  |
U238 |
1161 |
  |
1099 |
  |
1256 |
  |
1185 |
  |
1273 |
  |
1284 |
  |
ThO248 |
8729 |
  |
8797 |
  |
8786 |
  |
8985 |
  |
8849 |
  |
9057 |
  |
UO254 |
3387 |
  |
3355 |
  |
3269 |
  |
3355 |
  |
3255 |
  |
3448 |
  |
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 |
0.5 |
0.2 |
1.5 |
1.6 |
0.5 |
2.3 |
0.7 |
2.0 |
slope |
2.4 |
0.0 |
-0.0 |
-0.1 |
-0.0 |
-0.0 |
0.2 |
0.4 |
0.0 |
interc |
1.8E+4 |
5.1E-1 |
4.9E-1 |
1.0E+3 |
2.5E+2 |
3.7E+2 |
1.1E+3 |
8.7E+3 |
3.3E+3 |
cps |
9.4E+3 |
6.8E-2 |
3.3E-2 |
1.0E+2 |
8.0E+0 |
3.7E+1 |
2.4E+2 |
1.8E+3 |
1.7E+3 |
rej1 |
  |
  |
  |
  |
  |
  |
  |
  |
  |
rej2 |
  |
  |
  |
  |
  |
  |
  |
  |
  |
RATIOS
  |
204/206 |
207/206 |
208/206 |
196/238 |
206/238 |
248/238 |
254/238 |
error +- |
0.000348 |
0.078673 |
0.362547 |
39.385646 |
0.424579 |
7.385467 |
6.984609 |
ratio |
0.000427 |
0.002876 |
0.009536 |
0.720905 |
0.009975 |
0.134663 |
0.141768 |
CALIBRATION
CALIBRATION
Zr20/U=1.3034 Pb/U=0.2257 UO/U=6.9737 (Pb/U=0.00870(UO/U)^2)
REDUCED DATA
  |
rad cor |
+- |
age Ma |
+- |
  |
uncorrected |
  |
  |
  |
  |
  |
Pb206/U238 |
0.1698 |
0.0080 |
1011.2278 |
43.7 |
  |
Pb207/Pb206 |
0.0787 |
0.0029 |
1163.9126 |
70.8 |
  |
Pb207/U235 |
1.8423 |
0.1160 |
1060.6893 |
40.6 |
  |
Pb208/Th232 |
0.0525 |
0.0032 |
1034.6847 |
60.7 |
  |
204 corrected |
  |
  |
  |
  |
  |
Pb206/U238 |
0.1689 |
0.0080 |
1006.0073 |
44.0 |
  |
Pb207/Pb206 |
0.0737 |
0.0072 |
1033.8392 |
185.8 |
  |
Pb207/U235 |
1.7167 |
0.1954 |
1014.8049 |
70.5 |
  |
Pb208/Pb206 |
0.3521 |
0.0182 |
  |
  |
  |
Pb208/Th232 |
0.0507 |
0.0038 |
1000.0855 |
73.3 |
  |
207 corrected |
  |
  |
  |
  |
  |
Pb206/U238 |
0.1687 |
0.0079 |
1004.9528 |
43.6 |
  |
Pb208/Pb206 |
0.3500 |
0.0121 |
  |
  |
  |
Pb208/Th232 |
0.0504 |
0.0032 |
993.0931 |
62.3 |
  |
208 corrected |
  |
  |
  |
  |
  |
Pb206/U238 |
0.1691 |
0.0080 |
1007.0190 |
44.1 |
  |
Pb207/Pb206 |
0.0747 |
0.0076 |
1060.0262 |
191.6 |
  |
Pb207/U235 |
1.7411 |
0.2040 |
1023.8576 |
72.9 |
  |
CONCENTRATIONS
CONCENTRATIONS
U:29.9 ppm Th:35.1 ppm Th/U:1.172 ±0.0 Pb204:1.5 ppb sens 15.7


