SHRIMP II v2 SW v2.13 ACQUISITION DATA PRINTOUT
analyst GSWA, mount G14-21-1,
OGC-7.1, 2014-08-15, 07:40:37, 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=7985, y=1804, z=2640
primary beam = -2.0nA
QT1 Y defl = -1754 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 |
195.82400 |
0.00000 |
2.0 |
8.0 |
12 |
YES 3.0 |
REF |
ALW |
COUNTER |
R 1.0E-12 |
2 |
Pb204 |
203.98200 |
0.00000 |
10.0 |
3.0 |
11 |
NO 10.0 |
NONE |
ALW |
COUNTER |
  |
3 |
Bkgrnd |
204.02700 |
0.00000 |
10.0 |
5.0 |
11 |
NO 0.5 |
BAC |
ALW |
COUNTER |
  |
4 |
Pb206 |
205.98794 |
0.00000 |
10.0 |
4.0 |
11 |
YES 6.0 |
REF |
ALW |
COUNTER |
R 1.0E-12 |
5 |
Pb207 |
206.99294 |
0.00000 |
30.0 |
2.0 |
11 |
NO 5.0 |
NONE |
ALW |
COUNTER |
FS+10mV=1Mcps=FIXED As |
6 |
Pb208 |
207.99594 |
0.00000 |
10.0 |
2.0 |
11 |
NO 4.0 |
NONE |
ALW |
COUNTER |
  |
7 |
U238 |
238.07344 |
0.00000 |
5.0 |
3.0 |
10 |
YES 3.0 |
REF |
ALW |
COUNTER |
  |
8 |
ThO248 |
248.04967 |
0.00000 |
5.0 |
3.0 |
9 |
YES 3.0 |
NONE |
ALW |
COUNTER |
  |
9 |
UO254 |
254.05639 |
0.00000 |
2.0 |
3.0 |
9 |
YES 2.0 |
REF |
ALW |
COUNTER |
  |
AMU-B calibration field offset -0.076 G.
DATA
Zr2O |
19468 |
  |
20070 |
  |
20694 |
  |
21101 |
  |
21730 |
  |
22228 |
  |
Pb204 |
3 |
  |
3 |
  |
4 |
  |
0 |
  |
3 |
  |
1 |
  |
Bkgrnd |
1 |
  |
1 |
  |
1 |
  |
2 |
  |
1 |
  |
0 |
  |
Pb206 |
25811 |
  |
25160 |
  |
24805 |
  |
24530 |
  |
23988 |
  |
23714 |
  |
Pb207 |
23143 |
  |
22328 |
  |
22255 |
  |
21867 |
  |
21578 |
  |
21104 |
  |
Pb208 |
7424 |
  |
7218 |
  |
6947 |
  |
7053 |
  |
6951 |
  |
6810 |
  |
U238 |
6581 |
  |
6931 |
  |
6900 |
  |
7064 |
  |
7212 |
  |
7149 |
  |
ThO248 |
49855 |
  |
49966 |
  |
49984 |
  |
49580 |
  |
50123 |
  |
50496 |
  |
UO254 |
19267 |
  |
19145 |
  |
19711 |
  |
19453 |
  |
19893 |
  |
19583 |
  |
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 |
0.2 |
0.3 |
0.2 |
0.5 |
1.2 |
1.5 |
1.7 |
1.5 |
2.6 |
slope |
3.6 |
-0.0 |
-0.0 |
-2.7 |
-2.4 |
-0.7 |
0.7 |
0.6 |
0.7 |
interc |
1.9E+4 |
3.4E+0 |
1.3E+0 |
2.6E+4 |
2.3E+4 |
7.4E+3 |
6.6E+3 |
5.0E+4 |
1.9E+4 |
cps |
1.1E+4 |
2.2E-1 |
9.9E-2 |
2.5E+3 |
7.4E+2 |
7.1E+2 |
1.4E+3 |
1.0E+4 |
9.7E+3 |
rej1 |
  |
  |
  |
  |
  |
  |
  |
  |
  |
rej2 |
  |
  |
  |
  |
  |
  |
  |
  |
  |
RATIOS
  |
204/206 |
207/206 |
208/206 |
196/238 |
206/238 |
248/238 |
254/238 |
error +- |
0.000051 |
0.298614 |
0.287761 |
7.597473 |
1.781252 |
7.212494 |
7.020457 |
ratio |
0.000028 |
0.001201 |
0.001863 |
0.052486 |
0.012147 |
0.048322 |
0.055380 |
CALIBRATION
CALIBRATION
Zr20/U=1.3034 Pb/U=0.2257 UO/U=6.9737 (Pb/U=0.03614(UO/U)^2)
REDUCED DATA
  |
rad cor |
+- |
age Ma |
+- |
  |
uncorrected |
  |
  |
  |
  |
  |
Pb206/U238 |
0.7053 |
0.0121 |
3440.6248 |
45.7 |
  |
Pb207/Pb206 |
0.2986 |
0.0012 |
3463.0484 |
6.2 |
  |
Pb207/U235 |
29.0382 |
0.5266 |
3454.8119 |
17.6 |
  |
Pb208/Th232 |
0.1780 |
0.0038 |
3310.8276 |
64.3 |
  |
204 corrected |
  |
  |
  |
  |
  |
Pb206/U238 |
0.7047 |
0.0121 |
3438.4552 |
45.7 |
  |
Pb207/Pb206 |
0.2981 |
0.0013 |
3460.2429 |
6.7 |
  |
Pb207/U235 |
28.9622 |
0.5283 |
3452.2363 |
17.7 |
  |
Pb208/Pb206 |
0.2862 |
0.0021 |
  |
  |
  |
Pb208/Th232 |
0.1769 |
0.0038 |
3291.5762 |
64.9 |
  |
207 corrected |
  |
  |
  |
  |
  |
Pb206/U238 |
0.7003 |
0.0121 |
3421.8475 |
45.7 |
  |
Pb208/Pb206 |
0.2740 |
0.0045 |
  |
  |
  |
Pb208/Th232 |
0.1683 |
0.0044 |
3143.8163 |
75.4 |
  |
208 corrected |
  |
  |
  |
  |
  |
Pb206/U238 |
0.7098 |
0.0123 |
3457.5658 |
46.1 |
  |
Pb207/Pb206 |
0.3028 |
0.0022 |
3484.6407 |
11.4 |
  |
Pb207/U235 |
29.6333 |
0.5817 |
3474.7306 |
19.1 |
  |
CONCENTRATIONS
CONCENTRATIONS
U:155.6 ppm Th:177.4 ppm Th/U:1.140 ±0.0 Pb204:4.8 ppb sens 16.6


