SHRIMP II v2 SW v2.13 ACQUISITION DATA PRINTOUT
analyst GSWA, mount G14-21-1,
702-16.1, 2014-08-15, 09:28:31, 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=2248, z=3092
primary beam = -2.0nA
QT1 Y defl = -1703 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 |
195.82198 |
0.00000 |
2.0 |
8.0 |
12 |
YES 3.0 |
REF |
ALW |
COUNTER |
R 1.0E-12 |
2 |
Pb204 |
203.97997 |
0.00000 |
10.0 |
3.0 |
11 |
NO 10.0 |
NONE |
ALW |
COUNTER |
  |
3 |
Bkgrnd |
204.02497 |
0.00000 |
10.0 |
5.0 |
11 |
NO 0.5 |
BAC |
ALW |
COUNTER |
  |
4 |
Pb206 |
205.98594 |
0.00000 |
10.0 |
4.0 |
11 |
YES 6.0 |
REF |
ALW |
COUNTER |
R 1.0E-12 |
5 |
Pb207 |
206.99095 |
0.00000 |
30.0 |
2.0 |
11 |
NO 5.0 |
NONE |
ALW |
COUNTER |
FS+10mV=1Mcps=FIXED As |
6 |
Pb208 |
207.99395 |
0.00000 |
10.0 |
2.0 |
11 |
NO 4.0 |
NONE |
ALW |
COUNTER |
  |
7 |
U238 |
238.07102 |
0.00000 |
5.0 |
3.0 |
10 |
YES 3.0 |
REF |
ALW |
COUNTER |
  |
8 |
ThO248 |
248.04791 |
0.00000 |
5.0 |
3.0 |
9 |
YES 3.0 |
NONE |
ALW |
COUNTER |
  |
9 |
UO254 |
254.05430 |
0.00000 |
2.0 |
3.0 |
9 |
YES 2.0 |
REF |
ALW |
COUNTER |
  |
AMU-B calibration field offset -0.076 G.
DATA
Zr2O |
20106 |
  |
20799 |
  |
22064 |
  |
22070 |
  |
22332 |
  |
22934 |
  |
Pb204 |
1 |
  |
1 |
  |
3 |
  |
2 |
  |
1 |
  |
1 |
  |
Bkgrnd |
0 |
  |
0 |
  |
1 |
  |
0 |
  |
0 |
  |
1 |
  |
Pb206 |
1400 |
  |
1334 |
  |
1293 |
  |
1270 |
  |
1276 |
  |
1243 |
  |
Pb207 |
337 |
  |
349 |
  |
327 |
  |
283 |
  |
291 |
  |
315 |
  |
Pb208 |
448 |
  |
429 |
  |
429 |
  |
426 |
  |
415 |
  |
390 |
  |
U238 |
1407 |
  |
1508 |
  |
1518 |
  |
1517 |
  |
1630 |
  |
1520 |
  |
ThO248 |
11046 |
  |
10972 |
  |
11205 |
  |
11130 |
  |
11053 |
  |
10925 |
  |
UO254 |
4071 |
  |
4334 |
  |
4235 |
  |
4309 |
  |
4296 |
  |
4313 |
  |
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 |
1.0 |
0.5 |
0.2 |
0.4 |
1.5 |
0.2 |
2.0 |
1.1 |
1.7 |
slope |
3.6 |
-0.0 |
0.0 |
-0.2 |
-0.1 |
-0.1 |
0.2 |
-0.1 |
0.2 |
interc |
2.0E+4 |
1.6E+0 |
1.2E-2 |
1.4E+3 |
3.5E+2 |
4.5E+2 |
1.4E+3 |
1.1E+4 |
4.1E+3 |
cps |
1.1E+4 |
1.5E-1 |
3.5E-2 |
1.3E+2 |
1.1E+1 |
4.3E+1 |
3.0E+2 |
2.2E+3 |
2.1E+3 |
rej1 |
22064 |
  |
  |
  |
  |
  |
  |
  |
  |
rej2 |
  |
  |
  |
  |
  |
  |
  |
  |
  |
RATIOS
  |
204/206 |
207/206 |
208/206 |
196/238 |
206/238 |
248/238 |
254/238 |
error +- |
0.000879 |
0.081241 |
0.326615 |
36.140493 |
0.432781 |
7.348837 |
7.042234 |
ratio |
0.000417 |
0.002469 |
0.007470 |
0.550328 |
0.008122 |
0.114076 |
0.120082 |
CALIBRATION
CALIBRATION
Zr20/U=1.3034 Pb/U=0.2257 UO/U=6.9737 (Pb/U=0.00873(UO/U)^2)
REDUCED DATA
  |
rad cor |
+- |
age Ma |
+- |
  |
uncorrected |
  |
  |
  |
  |
  |
Pb206/U238 |
0.1703 |
0.0066 |
1013.7571 |
36.4 |
  |
Pb207/Pb206 |
0.0812 |
0.0025 |
1227.2725 |
58.5 |
  |
Pb207/U235 |
1.9076 |
0.0998 |
1083.7452 |
34.3 |
  |
Pb208/Th232 |
0.0480 |
0.0024 |
947.4327 |
46.9 |
  |
204 corrected |
  |
  |
  |
  |
  |
Pb206/U238 |
0.1679 |
0.0066 |
1000.5472 |
36.5 |
  |
Pb207/Pb206 |
0.0687 |
0.0069 |
889.0392 |
195.6 |
  |
Pb207/U235 |
1.5899 |
0.1794 |
966.2557 |
68.0 |
  |
Pb208/Pb206 |
0.2995 |
0.0170 |
  |
  |
  |
Pb208/Th232 |
0.0434 |
0.0032 |
858.3971 |
61.2 |
  |
207 corrected |
  |
  |
  |
  |
  |
Pb206/U238 |
0.1686 |
0.0066 |
1004.5506 |
36.2 |
  |
Pb208/Pb206 |
0.3078 |
0.0098 |
  |
  |
  |
Pb208/Th232 |
0.0448 |
0.0025 |
885.4025 |
48.0 |
  |
208 corrected |
  |
  |
  |
  |
  |
Pb206/U238 |
0.1724 |
0.0068 |
1025.4536 |
37.2 |
  |
Pb207/Pb206 |
0.0921 |
0.0061 |
1469.3376 |
121.6 |
  |
Pb207/U235 |
2.1894 |
0.1785 |
1177.6880 |
55.3 |
  |
CONCENTRATIONS
CONCENTRATIONS
U:32.8 ppm Th:38.0 ppm Th/U:1.159 ±0.0 Pb204:4.2 ppb sens 17.0


