SHRIMP II v2 SW v2.13 ACQUISITION DATA PRINTOUT
analyst GSWA, mount G14-21-1,
BRB-10.1, 2014-08-15, 03:37:06, 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=7998, y=1828, z=3747
primary beam = -1.9nA
QT1 Y defl = -1739 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 |
195.82462 |
0.00000 |
2.0 |
8.0 |
12 |
YES 3.0 |
REF |
ALW |
COUNTER |
R 1.0E-12 |
2 |
Pb204 |
203.98262 |
0.00000 |
10.0 |
3.0 |
11 |
NO 10.0 |
NONE |
ALW |
COUNTER |
  |
3 |
Bkgrnd |
204.02762 |
0.00000 |
10.0 |
5.0 |
11 |
NO 0.5 |
BAC |
ALW |
COUNTER |
  |
4 |
Pb206 |
205.98836 |
0.00000 |
10.0 |
4.0 |
11 |
YES 6.0 |
REF |
ALW |
COUNTER |
R 1.0E-12 |
5 |
Pb207 |
206.99336 |
0.00000 |
30.0 |
2.0 |
11 |
NO 5.0 |
NONE |
ALW |
COUNTER |
FS+10mV=1Mcps=FIXED As |
6 |
Pb208 |
207.99636 |
0.00000 |
10.0 |
2.0 |
11 |
NO 4.0 |
NONE |
ALW |
COUNTER |
  |
7 |
U238 |
238.07464 |
0.00000 |
5.0 |
3.0 |
10 |
YES 3.0 |
REF |
ALW |
COUNTER |
  |
8 |
ThO248 |
248.05121 |
0.00000 |
5.0 |
3.0 |
9 |
YES 3.0 |
NONE |
ALW |
COUNTER |
  |
9 |
UO254 |
254.05779 |
0.00000 |
2.0 |
3.0 |
9 |
YES 2.0 |
REF |
ALW |
COUNTER |
  |
AMU-B calibration field offset -0.076 G.
DATA
Zr2O |
18768 |
  |
18860 |
R |
19501 |
  |
19706 |
  |
20277 |
  |
20637 |
  |
Pb204 |
2 |
  |
1 |
  |
1 |
  |
0 |
  |
0 |
  |
2 |
  |
Bkgrnd |
0 |
  |
0 |
  |
0 |
  |
0 |
  |
0 |
  |
1 |
  |
Pb206 |
19543 |
  |
19135 |
  |
18835 |
  |
18412 |
  |
18178 |
  |
18077 |
  |
Pb207 |
3380 |
  |
3417 |
  |
3339 |
  |
3219 |
  |
3248 |
  |
3288 |
  |
Pb208 |
1374 |
  |
1273 |
  |
1279 |
  |
1254 |
  |
1298 |
  |
1281 |
  |
U238 |
37164 |
  |
37818 |
  |
38220 |
  |
39266 |
  |
39581 |
  |
39444 |
  |
ThO248 |
56636 |
  |
56016 |
  |
55560 |
  |
56206 |
  |
55817 |
  |
55654 |
  |
UO254 |
111882 |
  |
110755 |
  |
110769 |
  |
110426 |
  |
110646 |
  |
109981 |
  |
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 |
0.9 |
0.3 |
0.1 |
0.7 |
1.0 |
1.2 |
2.8 |
2.0 |
1.1 |
slope |
2.6 |
-0.0 |
0.0 |
-2.0 |
-0.2 |
-0.1 |
3.3 |
-0.9 |
-1.9 |
interc |
1.9E+4 |
1.3E+0 |
-2.4E-1 |
2.0E+4 |
3.4E+3 |
1.3E+3 |
3.7E+4 |
5.6E+4 |
1.1E+5 |
cps |
9.9E+3 |
9.7E-2 |
1.8E-2 |
1.9E+3 |
1.1E+2 |
1.3E+2 |
7.7E+3 |
1.1E+4 |
5.5E+4 |
rej1 |
  |
  |
  |
  |
  |
  |
  |
  |
  |
rej2 |
  |
  |
  |
  |
  |
  |
  |
  |
  |
RATIOS
  |
204/206 |
207/206 |
208/206 |
196/238 |
206/238 |
248/238 |
254/238 |
error +- |
0.000042 |
0.059170 |
0.069337 |
1.286458 |
0.243729 |
1.460984 |
7.227245 |
ratio |
0.000022 |
0.000455 |
0.000893 |
0.005844 |
0.001118 |
0.006231 |
0.026916 |
CALIBRATION
CALIBRATION
Zr20/U=1.3034 Pb/U=0.2257 UO/U=6.9737 (Pb/U=0.00467(UO/U)^2)
REDUCED DATA
  |
rad cor |
+- |
age Ma |
+- |
  |
uncorrected |
  |
  |
  |
  |
  |
Pb206/U238 |
0.0911 |
0.0008 |
561.8009 |
4.7 |
  |
Pb207/Pb206 |
0.0592 |
0.0005 |
573.3712 |
16.6 |
  |
Pb207/U235 |
0.7429 |
0.0092 |
564.0977 |
5.3 |
  |
Pb208/Th232 |
0.0280 |
0.0005 |
557.3880 |
9.1 |
  |
204 corrected |
  |
  |
  |
  |
  |
Pb206/U238 |
0.0910 |
0.0008 |
561.4379 |
4.7 |
  |
Pb207/Pb206 |
0.0586 |
0.0006 |
550.8132 |
21.1 |
  |
Pb207/U235 |
0.7348 |
0.0102 |
559.3400 |
6.0 |
  |
Pb208/Pb206 |
0.0679 |
0.0012 |
  |
  |
  |
Pb208/Th232 |
0.0274 |
0.0006 |
545.4627 |
11.0 |
  |
207 corrected |
  |
  |
  |
  |
  |
Pb206/U238 |
0.0910 |
0.0008 |
561.6082 |
4.7 |
  |
Pb208/Pb206 |
0.0686 |
0.0014 |
  |
  |
  |
Pb208/Th232 |
0.0276 |
0.0006 |
551.0573 |
12.7 |
  |
208 corrected |
  |
  |
  |
  |
  |
Pb206/U238 |
0.0911 |
0.0008 |
561.9396 |
4.7 |
  |
Pb207/Pb206 |
0.0594 |
0.0006 |
581.9008 |
22.9 |
  |
Pb207/U235 |
0.7460 |
0.0109 |
565.9101 |
6.3 |
  |
CONCENTRATIONS
CONCENTRATIONS
U:936.7 ppm Th:211.5 ppm Th/U:0.226 ±0.0 Pb204:3.1 ppb sens 16.7


