SHRIMP II v2 SW v2.13 ACQUISITION DATA PRINTOUT
analyst GSWA, mount G14-21-1,
506-27.1, 2014-08-15, 06:39:36, 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=1229, z=3524
primary beam = -1.9nA
QT1 Y defl = -1733 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 |
195.82355 |
0.00000 |
2.0 |
8.0 |
12 |
YES 3.0 |
REF |
ALW |
COUNTER |
R 1.0E-12 |
2 |
Pb204 |
203.98155 |
0.00000 |
10.0 |
3.0 |
11 |
NO 10.0 |
NONE |
ALW |
COUNTER |
  |
3 |
Bkgrnd |
204.02655 |
0.00000 |
10.0 |
5.0 |
11 |
NO 0.5 |
BAC |
ALW |
COUNTER |
  |
4 |
Pb206 |
205.98732 |
0.00000 |
10.0 |
4.0 |
11 |
YES 6.0 |
REF |
ALW |
COUNTER |
R 1.0E-12 |
5 |
Pb207 |
206.99232 |
0.00000 |
30.0 |
2.0 |
11 |
NO 5.0 |
NONE |
ALW |
COUNTER |
FS+10mV=1Mcps=FIXED As |
6 |
Pb208 |
207.99532 |
0.00000 |
10.0 |
2.0 |
11 |
NO 4.0 |
NONE |
ALW |
COUNTER |
  |
7 |
U238 |
238.07327 |
0.00000 |
5.0 |
3.0 |
10 |
YES 3.0 |
REF |
ALW |
COUNTER |
  |
8 |
ThO248 |
248.05048 |
0.00000 |
5.0 |
3.0 |
9 |
YES 3.0 |
NONE |
ALW |
COUNTER |
  |
9 |
UO254 |
254.05669 |
0.00000 |
2.0 |
3.0 |
9 |
YES 2.0 |
REF |
ALW |
COUNTER |
  |
AMU-B calibration field offset -0.076 G.
DATA
Zr2O |
19521 |
  |
19920 |
  |
20323 |
  |
21168 |
  |
21218 |
  |
21512 |
  |
Pb204 |
2 |
  |
0 |
  |
3 |
  |
0 |
  |
2 |
  |
0 |
  |
Bkgrnd |
1 |
  |
0 |
  |
2 |
  |
0 |
  |
0 |
  |
0 |
  |
Pb206 |
2010 |
  |
1891 |
  |
1827 |
  |
1821 |
  |
1875 |
  |
1821 |
  |
Pb207 |
504 |
  |
518 |
  |
462 |
  |
452 |
  |
443 |
  |
407 |
  |
Pb208 |
1013 |
  |
969 |
  |
975 |
  |
962 |
  |
964 |
  |
908 |
  |
U238 |
1666 |
  |
1797 |
  |
1876 |
  |
1883 |
  |
1856 |
  |
1960 |
R |
ThO248 |
21023 |
  |
20983 |
  |
20677 |
  |
21032 |
  |
20823 |
  |
21054 |
  |
UO254 |
5240 |
  |
5231 |
  |
5108 |
  |
5256 |
  |
5199 |
  |
5265 |
  |
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 |
1.8 |
0.4 |
0.2 |
1.6 |
0.5 |
0.3 |
1.5 |
1.4 |
0.8 |
slope |
2.7 |
-0.0 |
-0.0 |
-0.2 |
-0.1 |
-0.1 |
0.3 |
0.0 |
0.0 |
interc |
2.0E+4 |
1.7E+0 |
1.1E+0 |
2.0E+3 |
5.3E+2 |
1.0E+3 |
1.7E+3 |
2.1E+4 |
5.2E+3 |
cps |
1.0E+4 |
1.1E-1 |
4.7E-2 |
1.9E+2 |
1.6E+1 |
9.7E+1 |
3.6E+2 |
4.2E+3 |
2.6E+3 |
rej1 |
  |
  |
  |
  |
  |
  |
  |
  |
  |
rej2 |
  |
  |
  |
  |
  |
  |
  |
  |
  |
RATIOS
  |
204/206 |
207/206 |
208/206 |
196/238 |
206/238 |
248/238 |
254/238 |
error +- |
0.000345 |
0.082944 |
0.517395 |
28.493778 |
0.515085 |
11.504964 |
7.163962 |
ratio |
0.000272 |
0.001865 |
0.009229 |
0.350572 |
0.008645 |
0.139621 |
0.092981 |
CALIBRATION
CALIBRATION
Zr20/U=1.3034 Pb/U=0.2257 UO/U=6.9737 (Pb/U=0.01004(UO/U)^2)
REDUCED DATA
  |
rad cor |
+- |
age Ma |
+- |
  |
uncorrected |
  |
  |
  |
  |
  |
Pb206/U238 |
0.1959 |
0.0061 |
1153.0195 |
32.6 |
  |
Pb207/Pb206 |
0.0829 |
0.0019 |
1267.8980 |
43.3 |
  |
Pb207/U235 |
2.2399 |
0.0906 |
1193.6165 |
28.0 |
  |
Pb208/Th232 |
0.0566 |
0.0023 |
1112.7744 |
43.1 |
  |
204 corrected |
  |
  |
  |
  |
  |
Pb206/U238 |
0.1948 |
0.0061 |
1147.1951 |
32.7 |
  |
Pb207/Pb206 |
0.0781 |
0.0046 |
1148.6787 |
113.1 |
  |
Pb207/U235 |
2.0966 |
0.1472 |
1147.7085 |
47.1 |
  |
Pb208/Pb206 |
0.5079 |
0.0137 |
  |
  |
  |
Pb208/Th232 |
0.0553 |
0.0025 |
1087.0434 |
47.4 |
  |
207 corrected |
  |
  |
  |
  |
  |
Pb206/U238 |
0.1948 |
0.0060 |
1147.1258 |
32.5 |
  |
Pb208/Pb206 |
0.5078 |
0.0105 |
  |
  |
  |
Pb208/Th232 |
0.0552 |
0.0023 |
1086.7372 |
43.6 |
  |
208 corrected |
  |
  |
  |
  |
  |
Pb206/U238 |
0.1981 |
0.0063 |
1165.0220 |
33.9 |
  |
Pb207/Pb206 |
0.0928 |
0.0078 |
1484.4594 |
150.7 |
  |
Pb207/U235 |
2.5354 |
0.2362 |
1282.2564 |
65.7 |
  |
CONCENTRATIONS
CONCENTRATIONS
U:42.0 ppm Th:75.3 ppm Th/U:1.790 ±0.0 Pb204:2.4 ppb sens 17.0


