SHRIMP II v2 SW v2.13 ACQUISITION DATA PRINTOUT
analyst GSWA, mount G14-21-1,
BRB-6.1, 2014-08-14, 18:47:28, 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=7995, y=1733, z=3741
primary beam = -1.7nA
QT1 Y defl = -1699 bits; QT1 Z defl = 400 bits
runtable 2014-08-14 GSWA 0955
duration: 15min 28sec (928sec)
RUN TABLE
# |
Name |
AMU |
AMU Offset |
Time s |
Delay s |
Coll Focus |
Centering |
Ref |
Cent |
Detector |
CUP Mode setting |
1 |
Zr2O |
195.82203 |
0.00000 |
2.0 |
8.0 |
12 |
YES 3.0 |
REF |
ALW |
COUNTER |
R 1.0E-12 |
2 |
Pb204 |
203.98002 |
0.00000 |
10.0 |
3.0 |
11 |
NO 10.0 |
NONE |
ALW |
COUNTER |
  |
3 |
Bkgrnd |
204.02502 |
0.00000 |
10.0 |
5.0 |
11 |
NO 0.5 |
BAC |
ALW |
COUNTER |
  |
4 |
Pb206 |
205.98495 |
0.00000 |
10.0 |
4.0 |
11 |
YES 6.0 |
REF |
ALW |
COUNTER |
R 1.0E-12 |
5 |
Pb207 |
206.98995 |
0.00000 |
30.0 |
2.0 |
11 |
NO 5.0 |
NONE |
ALW |
COUNTER |
FS+10mV=1Mcps=FIXED As |
6 |
Pb208 |
207.99295 |
0.00000 |
10.0 |
2.0 |
11 |
NO 4.0 |
NONE |
ALW |
COUNTER |
  |
7 |
U238 |
238.07071 |
0.00000 |
5.0 |
3.0 |
10 |
YES 3.0 |
REF |
ALW |
COUNTER |
  |
8 |
ThO248 |
248.04817 |
0.00000 |
5.0 |
3.0 |
9 |
YES 3.0 |
NONE |
ALW |
COUNTER |
  |
9 |
UO254 |
254.05438 |
0.00000 |
2.0 |
3.0 |
9 |
YES 2.0 |
REF |
ALW |
COUNTER |
  |
AMU-B calibration field offset -0.076 G.
DATA
Zr2O |
18813 |
  |
18938 |
  |
19694 |
  |
20331 |
  |
20458 |
  |
20239 |
  |
Pb204 |
2 |
  |
0 |
  |
1 |
  |
1 |
  |
1 |
  |
1 |
  |
Bkgrnd |
3 |
  |
0 |
  |
1 |
  |
0 |
  |
0 |
  |
0 |
  |
Pb206 |
18018 |
  |
17914 |
  |
17525 |
  |
17362 |
  |
16897 |
  |
16932 |
  |
Pb207 |
3222 |
  |
3079 |
  |
3245 |
  |
3162 |
  |
2993 |
R |
3032 |
  |
Pb208 |
1165 |
  |
1185 |
  |
1161 |
  |
1260 |
  |
1074 |
  |
1146 |
  |
U238 |
37135 |
  |
37737 |
  |
38145 |
  |
38679 |
  |
38919 |
  |
39500 |
  |
ThO248 |
54162 |
  |
53707 |
  |
54385 |
  |
53337 |
  |
54373 |
  |
54586 |
  |
UO254 |
107939 |
  |
107659 |
  |
106872 |
  |
105741 |
R |
108753 |
  |
106878 |
  |
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 |
2.3 |
0.1 |
0.1 |
0.8 |
2.4 |
3.5 |
0.2 |
1.4 |
1.3 |
slope |
3.0 |
-0.0 |
-0.0 |
-1.6 |
-0.2 |
-0.1 |
3.0 |
0.8 |
-1.6 |
interc |
1.9E+4 |
1.2E+0 |
2.0E+0 |
1.8E+4 |
3.2E+3 |
1.2E+3 |
3.7E+4 |
5.4E+4 |
1.1E+5 |
cps |
1.0E+4 |
9.9E-2 |
6.1E-2 |
1.7E+3 |
1.0E+2 |
1.2E+2 |
7.6E+3 |
1.1E+4 |
5.4E+4 |
rej1 |
20239 |
  |
  |
  |
  |
  |
  |
53337 |
108753 |
rej2 |
  |
  |
  |
  |
  |
  |
  |
  |
105741 |
RATIOS
  |
204/206 |
207/206 |
208/206 |
196/238 |
206/238 |
248/238 |
254/238 |
error +- |
0.000022 |
0.059741 |
0.066928 |
1.311740 |
0.228568 |
1.420181 |
7.028908 |
ratio |
0.000034 |
0.000695 |
0.001512 |
0.006363 |
0.000852 |
0.004144 |
0.017633 |
CALIBRATION
CALIBRATION
Zr20/U=1.3034 Pb/U=0.2257 UO/U=6.9737 (Pb/U=0.00463(UO/U)^2)
REDUCED DATA
  |
rad cor |
+- |
age Ma |
+- |
  |
uncorrected |
  |
  |
  |
  |
  |
Pb206/U238 |
0.0903 |
0.0006 |
557.2080 |
3.3 |
  |
Pb207/Pb206 |
0.0597 |
0.0007 |
594.1902 |
25.0 |
  |
Pb207/U235 |
0.7437 |
0.0103 |
564.5391 |
6.0 |
  |
Pb208/Th232 |
0.0269 |
0.0006 |
537.2482 |
12.6 |
  |
204 corrected |
  |
  |
  |
  |
  |
Pb206/U238 |
0.0903 |
0.0006 |
557.0223 |
3.3 |
  |
Pb207/Pb206 |
0.0594 |
0.0009 |
582.7596 |
31.6 |
  |
Pb207/U235 |
0.7395 |
0.0123 |
562.1104 |
7.2 |
  |
Pb208/Pb206 |
0.0662 |
0.0019 |
  |
  |
  |
Pb208/Th232 |
0.0266 |
0.0008 |
531.1051 |
15.9 |
  |
207 corrected |
  |
  |
  |
  |
  |
Pb206/U238 |
0.0902 |
0.0006 |
556.6094 |
3.4 |
  |
Pb208/Pb206 |
0.0645 |
0.0023 |
  |
  |
  |
Pb208/Th232 |
0.0259 |
0.0009 |
517.4425 |
18.5 |
  |
208 corrected |
  |
  |
  |
  |
  |
Pb206/U238 |
0.0904 |
0.0006 |
557.8313 |
3.4 |
  |
Pb207/Pb206 |
0.0608 |
0.0010 |
631.9029 |
34.2 |
  |
Pb207/U235 |
0.7576 |
0.0136 |
572.6472 |
7.8 |
  |
CONCENTRATIONS
CONCENTRATIONS
U:902.0 ppm Th:202.3 ppm Th/U:0.224 ±0.0 Pb204:1.5 ppb sens 17.9


