SHRIMP II v2 SW v2.13 ACQUISITION DATA PRINTOUT
analyst GSWA, mount G14-21-1,
BRB-4.1, 2014-08-14, 14:56:44, 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=7993, y=1754, z=3660
primary beam = -1.8nA
QT1 Y defl = -1704 bits; QT1 Z defl = 385 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 |
195.81790 |
0.00000 |
2.0 |
8.0 |
12 |
YES 3.0 |
REF |
ALW |
COUNTER |
R 1.0E-12 |
2 |
Pb204 |
203.97590 |
0.00000 |
10.0 |
3.0 |
11 |
NO 10.0 |
NONE |
ALW |
COUNTER |
  |
3 |
Bkgrnd |
204.02090 |
0.00000 |
10.0 |
5.0 |
11 |
NO 0.5 |
BAC |
ALW |
COUNTER |
  |
4 |
Pb206 |
205.98146 |
0.00000 |
10.0 |
4.0 |
11 |
YES 6.0 |
REF |
ALW |
COUNTER |
R 1.0E-12 |
5 |
Pb207 |
206.98647 |
0.00000 |
30.0 |
2.0 |
11 |
NO 5.0 |
NONE |
ALW |
COUNTER |
FS+10mV=1Mcps=FIXED As |
6 |
Pb208 |
207.98947 |
0.00000 |
10.0 |
2.0 |
11 |
NO 4.0 |
NONE |
ALW |
COUNTER |
  |
7 |
U238 |
238.06639 |
0.00000 |
5.0 |
3.0 |
10 |
YES 3.0 |
REF |
ALW |
COUNTER |
  |
8 |
ThO248 |
248.04306 |
0.00000 |
5.0 |
3.0 |
9 |
YES 3.0 |
NONE |
ALW |
COUNTER |
  |
9 |
UO254 |
254.04925 |
0.00000 |
2.0 |
3.0 |
9 |
YES 2.0 |
REF |
ALW |
COUNTER |
  |
AMU-B calibration field offset -0.076 G.
DATA
Zr2O |
18948 |
  |
18828 |
  |
19515 |
  |
20416 |
  |
20474 |
  |
21081 |
  |
Pb204 |
2 |
  |
1 |
  |
0 |
  |
2 |
  |
0 |
  |
1 |
  |
Bkgrnd |
0 |
  |
0 |
  |
1 |
  |
0 |
  |
0 |
  |
0 |
  |
Pb206 |
17569 |
  |
17509 |
  |
17279 |
  |
16874 |
  |
16764 |
  |
16700 |
  |
Pb207 |
3184 |
  |
3158 |
  |
3011 |
  |
3028 |
  |
3112 |
  |
3099 |
  |
Pb208 |
1293 |
  |
1212 |
  |
1114 |
  |
1210 |
  |
1100 |
  |
1093 |
  |
U238 |
35867 |
  |
36503 |
  |
37437 |
  |
38324 |
  |
38553 |
  |
38749 |
  |
ThO248 |
53856 |
  |
53342 |
  |
53260 |
  |
53236 |
  |
53223 |
  |
53943 |
  |
UO254 |
105801 |
  |
105054 |
  |
105350 |
  |
105518 |
  |
108338 |
  |
105878 |
  |
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 |
3.9 |
0.3 |
0.2 |
0.7 |
1.6 |
2.3 |
2.7 |
2.6 |
1.2 |
slope |
3.1 |
-0.0 |
-0.0 |
-1.3 |
-0.1 |
-0.2 |
4.0 |
0.0 |
0.4 |
interc |
1.9E+4 |
1.5E+0 |
2.5E-1 |
1.8E+4 |
3.1E+3 |
1.3E+3 |
3.6E+4 |
5.3E+4 |
1.1E+5 |
cps |
1.0E+4 |
9.6E-2 |
1.6E-2 |
1.7E+3 |
1.0E+2 |
1.2E+2 |
7.5E+3 |
1.1E+4 |
5.3E+4 |
rej1 |
  |
  |
  |
  |
  |
  |
  |
  |
108338 |
rej2 |
  |
  |
  |
  |
  |
  |
  |
  |
  |
RATIOS
  |
204/206 |
207/206 |
208/206 |
196/238 |
206/238 |
248/238 |
254/238 |
error +- |
0.000047 |
0.060376 |
0.069011 |
1.341279 |
0.229411 |
1.433228 |
7.068960 |
ratio |
0.000025 |
0.000589 |
0.001257 |
0.008942 |
0.001068 |
0.006394 |
0.026329 |
CALIBRATION
CALIBRATION
Zr20/U=1.3034 Pb/U=0.2257 UO/U=6.9737 (Pb/U=0.00459(UO/U)^2)
REDUCED DATA
  |
rad cor |
+- |
age Ma |
+- |
  |
uncorrected |
  |
  |
  |
  |
  |
Pb206/U238 |
0.0896 |
0.0008 |
553.1227 |
4.7 |
  |
Pb207/Pb206 |
0.0604 |
0.0006 |
617.0768 |
20.9 |
  |
Pb207/U235 |
0.7458 |
0.0104 |
565.7962 |
6.0 |
  |
Pb208/Th232 |
0.0274 |
0.0006 |
547.0189 |
11.4 |
  |
204 corrected |
  |
  |
  |
  |
  |
Pb206/U238 |
0.0895 |
0.0008 |
552.7278 |
4.7 |
  |
Pb207/Pb206 |
0.0597 |
0.0007 |
592.8591 |
25.3 |
  |
Pb207/U235 |
0.7370 |
0.0114 |
560.6345 |
6.7 |
  |
Pb208/Pb206 |
0.0674 |
0.0015 |
  |
  |
  |
Pb208/Th232 |
0.0268 |
0.0007 |
534.0298 |
13.2 |
  |
207 corrected |
  |
  |
  |
  |
  |
Pb206/U238 |
0.0894 |
0.0008 |
552.0876 |
4.7 |
  |
Pb208/Pb206 |
0.0648 |
0.0019 |
  |
  |
  |
Pb208/Th232 |
0.0257 |
0.0008 |
512.9599 |
16.0 |
  |
208 corrected |
  |
  |
  |
  |
  |
Pb206/U238 |
0.0896 |
0.0008 |
553.3144 |
4.7 |
  |
Pb207/Pb206 |
0.0607 |
0.0008 |
628.6861 |
29.3 |
  |
Pb207/U235 |
0.7501 |
0.0129 |
568.2920 |
7.5 |
  |
CONCENTRATIONS
CONCENTRATIONS
U:885.4 ppm Th:199.5 ppm Th/U:0.225 ±0.0 Pb204:3.2 ppb sens 17.8


