SHRIMP II v2 SW v2.13 ACQUISITION DATA PRINTOUT
analyst GSWA, mount G14-21-1,
506-16.1, 2014-08-14, 18:27:42, 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=1422, z=3188
primary beam = -1.8nA
QT1 Y defl = -1708 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 |
195.82029 |
0.00000 |
2.0 |
8.0 |
12 |
YES 3.0 |
REF |
ALW |
COUNTER |
R 1.0E-12 |
2 |
Pb204 |
203.97829 |
0.00000 |
10.0 |
3.0 |
11 |
NO 10.0 |
NONE |
ALW |
COUNTER |
  |
3 |
Bkgrnd |
204.02329 |
0.00000 |
10.0 |
5.0 |
11 |
NO 0.5 |
BAC |
ALW |
COUNTER |
  |
4 |
Pb206 |
205.98498 |
0.00000 |
10.0 |
4.0 |
11 |
YES 6.0 |
REF |
ALW |
COUNTER |
R 1.0E-12 |
5 |
Pb207 |
206.98999 |
0.00000 |
30.0 |
2.0 |
11 |
NO 5.0 |
NONE |
ALW |
COUNTER |
FS+10mV=1Mcps=FIXED As |
6 |
Pb208 |
207.99299 |
0.00000 |
10.0 |
2.0 |
11 |
NO 4.0 |
NONE |
ALW |
COUNTER |
  |
7 |
U238 |
238.07067 |
0.00000 |
5.0 |
3.0 |
10 |
YES 3.0 |
REF |
ALW |
COUNTER |
  |
8 |
ThO248 |
248.04609 |
0.00000 |
5.0 |
3.0 |
9 |
YES 3.0 |
NONE |
ALW |
COUNTER |
  |
9 |
UO254 |
254.05252 |
0.00000 |
2.0 |
3.0 |
9 |
YES 2.0 |
REF |
ALW |
COUNTER |
  |
AMU-B calibration field offset -0.076 G.
DATA
Zr2O |
18117 |
  |
18726 |
  |
19686 |
  |
19845 |
  |
20393 |
  |
20633 |
  |
Pb204 |
2 |
  |
3 |
  |
0 |
  |
1 |
  |
1 |
  |
1 |
  |
Bkgrnd |
0 |
  |
0 |
  |
0 |
  |
1 |
  |
1 |
  |
1 |
  |
Pb206 |
927 |
  |
909 |
  |
898 |
  |
915 |
  |
863 |
  |
843 |
  |
Pb207 |
243 |
  |
255 |
  |
231 |
  |
249 |
  |
252 |
  |
234 |
  |
Pb208 |
344 |
  |
312 |
  |
275 |
  |
312 |
  |
313 |
  |
273 |
  |
U238 |
870 |
  |
910 |
  |
927 |
  |
874 |
  |
913 |
  |
887 |
  |
ThO248 |
6743 |
  |
6521 |
  |
6434 |
  |
6538 |
  |
6388 |
  |
6470 |
  |
UO254 |
2586 |
  |
2539 |
  |
2529 |
  |
2607 |
  |
2541 |
  |
2635 |
  |
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 |
2.9 |
0.2 |
0.0 |
0.3 |
0.5 |
1.9 |
0.7 |
1.4 |
0.8 |
slope |
3.3 |
-0.0 |
0.0 |
-0.1 |
-0.0 |
-0.1 |
0.0 |
-0.3 |
0.1 |
interc |
1.8E+4 |
2.1E+0 |
-2.2E-1 |
9.4E+2 |
2.5E+2 |
3.3E+2 |
8.9E+2 |
6.7E+3 |
2.5E+3 |
cps |
9.9E+3 |
1.3E-1 |
5.3E-2 |
8.9E+1 |
8.1E+0 |
3.1E+1 |
1.8E+2 |
1.3E+3 |
1.3E+3 |
rej1 |
  |
  |
  |
  |
  |
  |
  |
  |
  |
rej2 |
  |
  |
  |
  |
  |
  |
  |
  |
  |
RATIOS
  |
204/206 |
207/206 |
208/206 |
196/238 |
206/238 |
248/238 |
254/238 |
error +- |
0.000823 |
0.090622 |
0.344250 |
55.013025 |
0.497869 |
7.298332 |
7.162426 |
ratio |
0.000546 |
0.002680 |
0.011995 |
0.798041 |
0.009618 |
0.109031 |
0.113467 |
CALIBRATION
CALIBRATION
Zr20/U=1.3034 Pb/U=0.2257 UO/U=6.9737 (Pb/U=0.00970(UO/U)^2)
REDUCED DATA
  |
rad cor |
+- |
age Ma |
+- |
  |
uncorrected |
  |
  |
  |
  |
  |
Pb206/U238 |
0.1894 |
0.0070 |
1118.0754 |
38.0 |
  |
Pb207/Pb206 |
0.0906 |
0.0027 |
1438.6779 |
55.3 |
  |
Pb207/U235 |
2.3664 |
0.1189 |
1232.5291 |
35.3 |
  |
Pb208/Th232 |
0.0574 |
0.0032 |
1127.9899 |
60.6 |
  |
204 corrected |
  |
  |
  |
  |
  |
Pb206/U238 |
0.1869 |
0.0071 |
1104.5469 |
38.6 |
  |
Pb207/Pb206 |
0.0790 |
0.0089 |
1172.1269 |
208.1 |
  |
Pb207/U235 |
2.0358 |
0.2511 |
1127.5500 |
80.7 |
  |
Pb208/Pb206 |
0.3191 |
0.0233 |
  |
  |
  |
Pb208/Th232 |
0.0525 |
0.0045 |
1034.2702 |
85.8 |
  |
207 corrected |
  |
  |
  |
  |
  |
Pb206/U238 |
0.1863 |
0.0069 |
1101.5209 |
37.6 |
  |
Pb208/Pb206 |
0.3134 |
0.0140 |
  |
  |
  |
Pb208/Th232 |
0.0514 |
0.0032 |
1013.2751 |
61.3 |
  |
208 corrected |
  |
  |
  |
  |
  |
Pb206/U238 |
0.1891 |
0.0072 |
1116.3836 |
38.7 |
  |
Pb207/Pb206 |
0.0892 |
0.0077 |
1408.1208 |
157.0 |
  |
Pb207/U235 |
2.3251 |
0.2292 |
1219.9681 |
67.7 |
  |
CONCENTRATIONS
CONCENTRATIONS
U:21.8 ppm Th:24.7 ppm Th/U:1.136 ±0.0 Pb204:2.9 ppb sens 17.1


