SHRIMP II v2 SW v2.13 ACQUISITION DATA PRINTOUT
analyst GSWA, mount G14-21-1,
506-5.1, 2014-08-14, 13:40:37, 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=7981, y=1508, z=2420
primary beam = -1.8nA
QT1 Y defl = -1755 bits; QT1 Z defl = 385 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 |
195.81718 |
0.00000 |
2.0 |
8.0 |
12 |
YES 3.0 |
REF |
ALW |
COUNTER |
R 1.0E-12 |
2 |
Pb204 |
203.97518 |
0.00000 |
10.0 |
3.0 |
11 |
NO 10.0 |
NONE |
ALW |
COUNTER |
  |
3 |
Bkgrnd |
204.02018 |
0.00000 |
10.0 |
5.0 |
11 |
NO 0.5 |
BAC |
ALW |
COUNTER |
  |
4 |
Pb206 |
205.97974 |
0.00000 |
10.0 |
4.0 |
11 |
YES 6.0 |
REF |
ALW |
COUNTER |
R 1.0E-12 |
5 |
Pb207 |
206.98474 |
0.00000 |
30.0 |
2.0 |
11 |
NO 5.0 |
NONE |
ALW |
COUNTER |
FS+10mV=1Mcps=FIXED As |
6 |
Pb208 |
207.98774 |
0.00000 |
10.0 |
2.0 |
11 |
NO 4.0 |
NONE |
ALW |
COUNTER |
  |
7 |
U238 |
238.06634 |
0.00000 |
5.0 |
3.0 |
10 |
YES 3.0 |
REF |
ALW |
COUNTER |
  |
8 |
ThO248 |
248.04166 |
0.00000 |
5.0 |
3.0 |
9 |
YES 3.0 |
NONE |
ALW |
COUNTER |
  |
9 |
UO254 |
254.04764 |
0.00000 |
2.0 |
3.0 |
9 |
YES 2.0 |
REF |
ALW |
COUNTER |
  |
AMU-B calibration field offset -0.076 G.
DATA
Zr2O |
18549 |
  |
18326 |
  |
19843 |
  |
20234 |
  |
20722 |
  |
21063 |
  |
Pb204 |
2 |
  |
2 |
  |
1 |
  |
0 |
  |
0 |
  |
2 |
  |
Bkgrnd |
1 |
  |
0 |
  |
0 |
  |
0 |
  |
2 |
  |
0 |
  |
Pb206 |
1878 |
  |
1890 |
  |
1909 |
  |
1826 |
  |
1858 |
  |
1718 |
  |
Pb207 |
438 |
R |
480 |
  |
463 |
  |
452 |
  |
450 |
  |
416 |
  |
Pb208 |
867 |
  |
867 |
  |
892 |
  |
789 |
  |
787 |
  |
862 |
  |
U238 |
1664 |
  |
1764 |
  |
1846 |
  |
1938 |
  |
1848 |
  |
1883 |
  |
ThO248 |
17717 |
  |
17694 |
  |
18027 |
  |
18233 |
  |
18314 |
  |
18013 |
  |
UO254 |
5032 |
  |
4966 |
  |
5146 |
  |
5167 |
  |
5189 |
  |
5147 |
  |
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 |
1.0 |
0.3 |
0.3 |
1.4 |
1.0 |
2.4 |
2.3 |
2.0 |
0.8 |
slope |
3.3 |
-0.0 |
0.0 |
-0.2 |
-0.0 |
-0.1 |
0.3 |
0.7 |
0.2 |
interc |
1.9E+4 |
1.7E+0 |
4.2E-1 |
1.9E+3 |
4.7E+2 |
8.8E+2 |
1.7E+3 |
1.8E+4 |
5.0E+3 |
cps |
1.0E+4 |
1.1E-1 |
5.0E-2 |
1.8E+2 |
1.5E+1 |
8.5E+1 |
3.6E+2 |
3.6E+3 |
2.5E+3 |
rej1 |
18326 |
  |
  |
  |
  |
  |
  |
  |
  |
rej2 |
  |
  |
  |
  |
  |
  |
  |
  |
  |
RATIOS
  |
204/206 |
207/206 |
208/206 |
196/238 |
206/238 |
248/238 |
254/238 |
error +- |
0.000334 |
0.081115 |
0.458617 |
27.797441 |
0.511126 |
9.936421 |
7.040376 |
ratio |
0.000264 |
0.001809 |
0.011281 |
0.412274 |
0.009383 |
0.150752 |
0.109944 |
CALIBRATION
CALIBRATION
Zr20/U=1.3034 Pb/U=0.2257 UO/U=6.9737 (Pb/U=0.01031(UO/U)^2)
REDUCED DATA
  |
rad cor |
+- |
age Ma |
+- |
  |
uncorrected |
  |
  |
  |
  |
  |
Pb206/U238 |
0.2012 |
0.0073 |
1181.9448 |
39.0 |
  |
Pb207/Pb206 |
0.0811 |
0.0018 |
1224.2252 |
43.2 |
  |
Pb207/U235 |
2.2506 |
0.1010 |
1196.9795 |
31.1 |
  |
Pb208/Th232 |
0.0589 |
0.0029 |
1156.3442 |
54.9 |
  |
204 corrected |
  |
  |
  |
  |
  |
Pb206/U238 |
0.2002 |
0.0073 |
1176.1758 |
39.1 |
  |
Pb207/Pb206 |
0.0764 |
0.0045 |
1105.2291 |
112.7 |
  |
Pb207/U235 |
2.1081 |
0.1532 |
1151.4637 |
48.9 |
  |
Pb208/Pb206 |
0.4491 |
0.0149 |
  |
  |
  |
Pb208/Th232 |
0.0574 |
0.0031 |
1127.1624 |
59.0 |
  |
207 corrected |
  |
  |
  |
  |
  |
Pb206/U238 |
0.2008 |
0.0073 |
1179.5546 |
39.0 |
  |
Pb208/Pb206 |
0.4547 |
0.0122 |
  |
  |
  |
Pb208/Th232 |
0.0582 |
0.0029 |
1144.2553 |
55.7 |
  |
208 corrected |
  |
  |
  |
  |
  |
Pb206/U238 |
0.2024 |
0.0075 |
1188.3577 |
40.3 |
  |
Pb207/Pb206 |
0.0863 |
0.0085 |
1345.2737 |
179.6 |
  |
Pb207/U235 |
2.4092 |
0.2645 |
1245.3353 |
75.9 |
  |
CONCENTRATIONS
CONCENTRATIONS
U:42.6 ppm Th:66.8 ppm Th/U:1.567 ±0.0 Pb204:2.5 ppb sens 16.8


