SHRIMP II v2 SW v2.13 ACQUISITION DATA PRINTOUT
analyst GSWA, mount G14-21-1,
506-18.1, 2014-08-14, 22:41:17, 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=7986, y=1443, z=3251
primary beam = -1.9nA
QT1 Y defl = -1702 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 |
195.82665 |
0.00000 |
2.0 |
8.0 |
12 |
YES 3.0 |
REF |
ALW |
COUNTER |
R 1.0E-12 |
2 |
Pb204 |
203.98465 |
0.00000 |
10.0 |
3.0 |
11 |
NO 10.0 |
NONE |
ALW |
COUNTER |
  |
3 |
Bkgrnd |
204.02965 |
0.00000 |
10.0 |
5.0 |
11 |
NO 0.5 |
BAC |
ALW |
COUNTER |
  |
4 |
Pb206 |
205.99126 |
0.00000 |
10.0 |
4.0 |
11 |
YES 6.0 |
REF |
ALW |
COUNTER |
R 1.0E-12 |
5 |
Pb207 |
206.99626 |
0.00000 |
30.0 |
2.0 |
11 |
NO 5.0 |
NONE |
ALW |
COUNTER |
FS+10mV=1Mcps=FIXED As |
6 |
Pb208 |
207.99926 |
0.00000 |
10.0 |
2.0 |
11 |
NO 4.0 |
NONE |
ALW |
COUNTER |
  |
7 |
U238 |
238.07523 |
0.00000 |
5.0 |
3.0 |
10 |
YES 3.0 |
REF |
ALW |
COUNTER |
  |
8 |
ThO248 |
248.05394 |
0.00000 |
5.0 |
3.0 |
9 |
YES 3.0 |
NONE |
ALW |
COUNTER |
  |
9 |
UO254 |
254.05948 |
0.00000 |
2.0 |
3.0 |
9 |
YES 2.0 |
REF |
ALW |
COUNTER |
  |
AMU-B calibration field offset -0.076 G.
DATA
Zr2O |
19677 |
  |
20337 |
  |
20834 |
  |
20842 |
  |
21256 |
  |
21735 |
  |
Pb204 |
2 |
  |
3 |
  |
1 |
  |
0 |
  |
0 |
  |
0 |
  |
Bkgrnd |
1 |
  |
0 |
  |
2 |
  |
0 |
  |
3 |
  |
0 |
  |
Pb206 |
708 |
  |
692 |
  |
726 |
  |
750 |
  |
702 |
  |
733 |
  |
Pb207 |
201 |
  |
199 |
  |
188 |
  |
207 |
  |
186 |
  |
181 |
  |
Pb208 |
247 |
  |
234 |
  |
228 |
R |
250 |
  |
226 |
  |
258 |
  |
U238 |
666 |
  |
710 |
  |
721 |
  |
714 |
  |
704 |
  |
718 |
  |
ThO248 |
4680 |
  |
4779 |
  |
4847 |
  |
4980 |
  |
5007 |
  |
5221 |
  |
UO254 |
1985 |
  |
1946 |
  |
1975 |
  |
1975 |
  |
2017 |
  |
2103 |
  |
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 |
1.5 |
0.2 |
0.4 |
0.7 |
0.4 |
0.8 |
0.5 |
0.4 |
0.8 |
slope |
2.4 |
-0.0 |
0.0 |
0.0 |
-0.0 |
0.0 |
0.0 |
0.7 |
0.1 |
interc |
2.0E+4 |
2.5E+0 |
8.4E-1 |
7.0E+2 |
2.0E+2 |
2.4E+2 |
6.8E+2 |
4.6E+3 |
1.9E+3 |
cps |
1.0E+4 |
8.7E-2 |
1.0E-1 |
7.2E+1 |
6.5E+0 |
2.4E+1 |
1.4E+2 |
9.7E+2 |
9.9E+2 |
rej1 |
  |
  |
  |
  |
  |
  |
  |
  |
  |
rej2 |
  |
  |
  |
  |
  |
  |
  |
  |
  |
RATIOS
  |
204/206 |
207/206 |
208/206 |
196/238 |
206/238 |
248/238 |
254/238 |
error +- |
-0.000195 |
0.088849 |
0.333164 |
74.385346 |
0.510865 |
6.931215 |
7.073031 |
ratio |
-Inf |
0.002956 |
0.010185 |
1.174306 |
0.011077 |
0.114134 |
0.126664 |
CALIBRATION
CALIBRATION
Zr20/U=1.3034 Pb/U=0.2257 UO/U=6.9737 (Pb/U=0.01021(UO/U)^2)
REDUCED DATA
  |
rad cor |
+- |
age Ma |
+- |
  |
uncorrected |
  |
  |
  |
  |
  |
Pb206/U238 |
0.1993 |
0.0083 |
1171.4416 |
44.7 |
  |
Pb207/Pb206 |
0.0888 |
0.0030 |
1400.9087 |
62.5 |
  |
Pb207/U235 |
2.4413 |
0.1383 |
1254.8488 |
40.0 |
  |
Pb208/Th232 |
0.0609 |
0.0035 |
1195.6850 |
66.4 |
  |
204 corrected |
  |
  |
  |
  |
  |
Pb206/U238 |
0.1999 |
Inf |
1174.7821 |
Inf |
  |
Pb207/Pb206 |
0.0916 |
Inf |
1458.3521 |
NaN |
  |
Pb207/U235 |
2.5237 |
Inf |
1278.8851 |
Inf |
  |
Pb208/Pb206 |
0.3391 |
Inf |
  |
  |
  |
Pb208/Th232 |
0.0622 |
Inf |
1219.8946 |
Inf |
  |
207 corrected |
  |
  |
  |
  |
  |
Pb206/U238 |
0.1971 |
0.0083 |
1159.6070 |
44.4 |
  |
Pb208/Pb206 |
0.3120 |
0.0128 |
  |
  |
  |
Pb208/Th232 |
0.0564 |
0.0036 |
1109.7815 |
68.5 |
  |
208 corrected |
  |
  |
  |
  |
  |
Pb206/U238 |
0.1985 |
0.0084 |
1167.5254 |
45.1 |
  |
Pb207/Pb206 |
0.0856 |
0.0072 |
1330.2239 |
154.6 |
  |
Pb207/U235 |
2.3447 |
0.2316 |
1225.9418 |
68.0 |
  |
CONCENTRATIONS
CONCENTRATIONS
U:16.0 ppm Th:17.4 ppm Th/U:1.089 ±0.0 Pb204:-0.5 ppb sens 17.2


