SHRIMP II v2 SW v2.13 ACQUISITION DATA PRINTOUT
analyst GSWA, mount G14-21-1,
506-2.1, 2014-08-14, 12:24:33, 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=7981, y=1518, z=2190
primary beam = -1.8nA
QT1 Y defl = -1770 bits; QT1 Z defl = 385 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 |
195.81687 |
0.00000 |
2.0 |
8.0 |
12 |
YES 3.0 |
REF |
ALW |
COUNTER |
R 1.0E-12 |
2 |
Pb204 |
203.97487 |
0.00000 |
10.0 |
3.0 |
11 |
NO 10.0 |
NONE |
ALW |
COUNTER |
  |
3 |
Bkgrnd |
204.01987 |
0.00000 |
10.0 |
5.0 |
11 |
NO 0.5 |
BAC |
ALW |
COUNTER |
  |
4 |
Pb206 |
205.98032 |
0.00000 |
10.0 |
4.0 |
11 |
YES 6.0 |
REF |
ALW |
COUNTER |
R 1.0E-12 |
5 |
Pb207 |
206.98532 |
0.00000 |
30.0 |
2.0 |
11 |
NO 5.0 |
NONE |
ALW |
COUNTER |
FS+10mV=1Mcps=FIXED As |
6 |
Pb208 |
207.98832 |
0.00000 |
10.0 |
2.0 |
11 |
NO 4.0 |
NONE |
ALW |
COUNTER |
  |
7 |
U238 |
238.06447 |
0.00000 |
5.0 |
3.0 |
10 |
YES 3.0 |
REF |
ALW |
COUNTER |
  |
8 |
ThO248 |
248.04073 |
0.00000 |
5.0 |
3.0 |
9 |
YES 3.0 |
NONE |
ALW |
COUNTER |
  |
9 |
UO254 |
254.04643 |
0.00000 |
2.0 |
3.0 |
9 |
YES 2.0 |
REF |
ALW |
COUNTER |
  |
AMU-B calibration field offset -0.076 G.
DATA
Zr2O |
18291 |
  |
19030 |
R |
20204 |
  |
20513 |
  |
20890 |
  |
21554 |
  |
Pb204 |
1 |
  |
4 |
  |
1 |
  |
1 |
  |
0 |
  |
1 |
  |
Bkgrnd |
0 |
  |
1 |
  |
0 |
  |
4 |
  |
0 |
  |
1 |
  |
Pb206 |
1286 |
  |
1275 |
  |
1271 |
  |
1236 |
  |
1286 |
R |
1238 |
  |
Pb207 |
341 |
  |
343 |
  |
272 |
  |
338 |
  |
296 |
  |
287 |
  |
Pb208 |
441 |
  |
476 |
  |
476 |
  |
476 |
  |
491 |
  |
431 |
  |
U238 |
1196 |
  |
1201 |
  |
1300 |
  |
1281 |
  |
1343 |
  |
1308 |
  |
ThO248 |
9812 |
  |
10258 |
  |
10039 |
  |
10027 |
  |
10343 |
R |
10058 |
  |
UO254 |
3552 |
  |
3554 |
  |
3448 |
  |
3545 |
  |
3574 |
  |
3623 |
  |
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 |
3.7 |
0.8 |
0.6 |
0.3 |
2.8 |
1.5 |
0.9 |
3.6 |
0.9 |
slope |
4.1 |
-0.0 |
0.0 |
-0.0 |
-0.1 |
-0.0 |
0.2 |
0.3 |
0.1 |
interc |
1.8E+4 |
2.3E+0 |
5.2E-1 |
1.3E+3 |
3.4E+2 |
4.7E+2 |
1.2E+3 |
9.9E+3 |
3.5E+3 |
cps |
1.0E+4 |
1.3E-1 |
1.0E-1 |
1.3E+2 |
1.0E+1 |
4.7E+1 |
2.5E+2 |
2.0E+3 |
1.8E+3 |
rej1 |
  |
  |
  |
  |
  |
  |
  |
  |
  |
rej2 |
  |
  |
  |
  |
  |
  |
  |
  |
  |
RATIOS
  |
204/206 |
207/206 |
208/206 |
196/238 |
206/238 |
248/238 |
254/238 |
error +- |
0.000183 |
0.082095 |
0.367113 |
40.243706 |
0.502065 |
7.994782 |
7.029149 |
ratio |
0.000343 |
0.003310 |
0.009602 |
0.512110 |
0.008149 |
0.110456 |
0.093882 |
CALIBRATION
CALIBRATION
Zr20/U=1.3034 Pb/U=0.2257 UO/U=6.9737 (Pb/U=0.01016(UO/U)^2)
REDUCED DATA
  |
rad cor |
+- |
age Ma |
+- |
  |
uncorrected |
  |
  |
  |
  |
  |
Pb206/U238 |
0.1983 |
0.0062 |
1166.1724 |
33.3 |
  |
Pb207/Pb206 |
0.0821 |
0.0033 |
1247.7800 |
77.0 |
  |
Pb207/U235 |
2.2446 |
0.1212 |
1195.0934 |
37.2 |
  |
Pb208/Th232 |
0.0577 |
0.0026 |
1132.8965 |
49.6 |
  |
204 corrected |
  |
  |
  |
  |
  |
Pb206/U238 |
0.1977 |
0.0063 |
1163.0417 |
33.7 |
  |
Pb207/Pb206 |
0.0795 |
0.0063 |
1184.7630 |
148.0 |
  |
Pb207/U235 |
2.1674 |
0.1916 |
1170.6552 |
59.6 |
  |
Pb208/Pb206 |
0.3616 |
0.0157 |
  |
  |
  |
Pb208/Th232 |
0.0566 |
0.0032 |
1113.2640 |
61.8 |
  |
207 corrected |
  |
  |
  |
  |
  |
Pb206/U238 |
0.1975 |
0.0062 |
1161.9957 |
33.4 |
  |
Pb208/Pb206 |
0.3598 |
0.0128 |
  |
  |
  |
Pb208/Th232 |
0.0563 |
0.0029 |
1106.7032 |
55.2 |
  |
208 corrected |
  |
  |
  |
  |
  |
Pb206/U238 |
0.1995 |
0.0064 |
1172.5673 |
34.1 |
  |
Pb207/Pb206 |
0.0873 |
0.0071 |
1367.9944 |
148.7 |
  |
Pb207/U235 |
2.4023 |
0.2182 |
1243.2881 |
63.1 |
  |
CONCENTRATIONS
CONCENTRATIONS
U:29.4 ppm Th:37.1 ppm Th/U:1.263 ±0.0 Pb204:0.9 ppb sens 17.3


