SHRIMP II v2 SW v2.13 ACQUISITION DATA PRINTOUT
analyst GSWA, mount G14-21-1,
702-11.1, 2014-08-15, 05:17:29, 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=2113, z=2854
primary beam = -1.9nA
QT1 Y defl = -1745 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 |
195.82360 |
0.00000 |
2.0 |
8.0 |
12 |
YES 3.0 |
REF |
ALW |
COUNTER |
R 1.0E-12 |
2 |
Pb204 |
203.98160 |
0.00000 |
10.0 |
3.0 |
11 |
NO 10.0 |
NONE |
ALW |
COUNTER |
  |
3 |
Bkgrnd |
204.02660 |
0.00000 |
10.0 |
5.0 |
11 |
NO 0.5 |
BAC |
ALW |
COUNTER |
  |
4 |
Pb206 |
205.98761 |
0.00000 |
10.0 |
4.0 |
11 |
YES 6.0 |
REF |
ALW |
COUNTER |
R 1.0E-12 |
5 |
Pb207 |
206.99261 |
0.00000 |
30.0 |
2.0 |
11 |
NO 5.0 |
NONE |
ALW |
COUNTER |
FS+10mV=1Mcps=FIXED As |
6 |
Pb208 |
207.99561 |
0.00000 |
10.0 |
2.0 |
11 |
NO 4.0 |
NONE |
ALW |
COUNTER |
  |
7 |
U238 |
238.07339 |
0.00000 |
5.0 |
3.0 |
10 |
YES 3.0 |
REF |
ALW |
COUNTER |
  |
8 |
ThO248 |
248.04961 |
0.00000 |
5.0 |
3.0 |
9 |
YES 3.0 |
NONE |
ALW |
COUNTER |
  |
9 |
UO254 |
254.05584 |
0.00000 |
2.0 |
3.0 |
9 |
YES 2.0 |
REF |
ALW |
COUNTER |
  |
AMU-B calibration field offset -0.076 G.
DATA
Zr2O |
18261 |
  |
19016 |
  |
20150 |
  |
19919 |
  |
20497 |
  |
20915 |
  |
Pb204 |
0 |
  |
1 |
  |
1 |
  |
2 |
  |
0 |
  |
2 |
  |
Bkgrnd |
2 |
  |
1 |
  |
1 |
  |
0 |
  |
1 |
  |
0 |
  |
Pb206 |
1915 |
  |
1901 |
  |
1882 |
  |
1849 |
  |
1816 |
  |
1832 |
  |
Pb207 |
432 |
  |
422 |
  |
445 |
  |
403 |
  |
412 |
  |
437 |
  |
Pb208 |
592 |
  |
600 |
  |
589 |
  |
590 |
  |
590 |
  |
603 |
  |
U238 |
2085 |
  |
2110 |
  |
2148 |
  |
2134 |
  |
2178 |
  |
2193 |
  |
ThO248 |
14179 |
  |
14242 |
  |
14413 |
  |
14436 |
  |
14672 |
  |
14596 |
  |
UO254 |
5857 |
  |
5824 |
R |
6201 |
  |
5907 |
  |
6033 |
  |
6097 |
  |
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 |
0.6 |
0.2 |
0.1 |
0.1 |
0.7 |
0.1 |
0.1 |
0.3 |
3.1 |
slope |
3.4 |
0.0 |
-0.0 |
-0.1 |
-0.0 |
0.0 |
0.1 |
0.6 |
0.3 |
interc |
1.8E+4 |
3.8E-1 |
1.7E+0 |
1.9E+3 |
4.3E+2 |
5.9E+2 |
2.1E+3 |
1.4E+4 |
5.8E+3 |
cps |
9.9E+3 |
1.1E-1 |
7.9E-2 |
1.9E+2 |
1.4E+1 |
5.9E+1 |
4.3E+2 |
2.9E+3 |
3.0E+3 |
rej1 |
20150 |
  |
  |
  |
  |
  |
  |
  |
  |
rej2 |
  |
  |
  |
  |
  |
  |
  |
  |
  |
RATIOS
  |
204/206 |
207/206 |
208/206 |
196/238 |
206/238 |
248/238 |
254/238 |
error +- |
0.000140 |
0.075591 |
0.317889 |
23.247947 |
0.437436 |
6.741062 |
6.989177 |
ratio |
0.000464 |
0.001663 |
0.006125 |
0.216025 |
0.005659 |
0.063767 |
0.089749 |
CALIBRATION
CALIBRATION
Zr20/U=1.3034 Pb/U=0.2257 UO/U=6.9737 (Pb/U=0.00895(UO/U)^2)
REDUCED DATA
  |
rad cor |
+- |
age Ma |
+- |
  |
uncorrected |
  |
  |
  |
  |
  |
Pb206/U238 |
0.1748 |
0.0050 |
1038.2519 |
27.5 |
  |
Pb207/Pb206 |
0.0756 |
0.0017 |
1084.2611 |
43.5 |
  |
Pb207/U235 |
1.8214 |
0.0698 |
1053.1797 |
24.8 |
  |
Pb208/Th232 |
0.0519 |
0.0020 |
1023.5304 |
38.0 |
  |
204 corrected |
  |
  |
  |
  |
  |
Pb206/U238 |
0.1744 |
0.0052 |
1036.1054 |
28.4 |
  |
Pb207/Pb206 |
0.0736 |
0.0074 |
1030.6107 |
189.9 |
  |
Pb207/U235 |
1.7695 |
0.1907 |
1034.3403 |
67.6 |
  |
Pb208/Pb206 |
0.3136 |
0.0178 |
  |
  |
  |
Pb208/Th232 |
0.0511 |
0.0034 |
1007.8660 |
64.9 |
  |
207 corrected |
  |
  |
  |
  |
  |
Pb206/U238 |
0.1744 |
0.0050 |
1036.3214 |
27.5 |
  |
Pb208/Pb206 |
0.3140 |
0.0074 |
  |
  |
  |
Pb208/Th232 |
0.0512 |
0.0021 |
1009.4428 |
39.9 |
  |
208 corrected |
  |
  |
  |
  |
  |
Pb206/U238 |
0.1752 |
0.0051 |
1040.6115 |
27.9 |
  |
Pb207/Pb206 |
0.0778 |
0.0044 |
1140.9212 |
107.9 |
  |
Pb207/U235 |
1.8784 |
0.1248 |
1073.5013 |
43.1 |
  |
CONCENTRATIONS
CONCENTRATIONS
U:50.7 ppm Th:54.2 ppm Th/U:1.069 ±0.0 Pb204:1.1 ppb sens 15.8


