SHRIMP II v2 SW v2.13 ACQUISITION DATA PRINTOUT
analyst GSWA, mount G14-21-1,
702-7.2, 2014-08-15, 01:33:51, 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=2294, z=2615
primary beam = -1.9nA
QT1 Y defl = -1736 bits; QT1 Z defl = 400 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 |
195.82377 |
0.00000 |
2.0 |
8.0 |
12 |
YES 3.0 |
REF |
ALW |
COUNTER |
R 1.0E-12 |
2 |
Pb204 |
203.98177 |
0.00000 |
10.0 |
3.0 |
11 |
NO 10.0 |
NONE |
ALW |
COUNTER |
  |
3 |
Bkgrnd |
204.02677 |
0.00000 |
10.0 |
5.0 |
11 |
NO 0.5 |
BAC |
ALW |
COUNTER |
  |
4 |
Pb206 |
205.98778 |
0.00000 |
10.0 |
4.0 |
11 |
YES 6.0 |
REF |
ALW |
COUNTER |
R 1.0E-12 |
5 |
Pb207 |
206.99279 |
0.00000 |
30.0 |
2.0 |
11 |
NO 5.0 |
NONE |
ALW |
COUNTER |
FS+10mV=1Mcps=FIXED As |
6 |
Pb208 |
207.99579 |
0.00000 |
10.0 |
2.0 |
11 |
NO 4.0 |
NONE |
ALW |
COUNTER |
  |
7 |
U238 |
238.07396 |
0.00000 |
5.0 |
3.0 |
10 |
YES 3.0 |
REF |
ALW |
COUNTER |
  |
8 |
ThO248 |
248.04969 |
0.00000 |
5.0 |
3.0 |
9 |
YES 3.0 |
NONE |
ALW |
COUNTER |
  |
9 |
UO254 |
254.05752 |
0.00000 |
2.0 |
3.0 |
9 |
YES 2.0 |
REF |
ALW |
COUNTER |
  |
AMU-B calibration field offset -0.076 G.
DATA
Zr2O |
19089 |
  |
19752 |
  |
20729 |
  |
21033 |
  |
21450 |
  |
22059 |
  |
Pb204 |
1 |
  |
3 |
  |
1 |
  |
1 |
  |
0 |
  |
0 |
  |
Bkgrnd |
1 |
  |
0 |
  |
2 |
  |
1 |
  |
1 |
  |
1 |
  |
Pb206 |
1825 |
  |
1836 |
  |
1791 |
  |
1752 |
  |
1731 |
  |
1768 |
  |
Pb207 |
422 |
  |
442 |
  |
389 |
  |
373 |
  |
427 |
  |
418 |
  |
Pb208 |
578 |
  |
554 |
  |
562 |
  |
534 |
  |
605 |
  |
589 |
  |
U238 |
1939 |
  |
1957 |
  |
2146 |
  |
2185 |
  |
2144 |
  |
2141 |
  |
ThO248 |
14173 |
  |
13736 |
  |
14002 |
  |
14105 |
  |
14118 |
  |
14142 |
  |
UO254 |
5667 |
  |
5657 |
  |
5682 |
  |
5819 |
R |
5792 |
  |
5778 |
  |
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 |
1.9 |
0.4 |
0.1 |
0.4 |
2.0 |
1.3 |
2.5 |
2.1 |
0.4 |
slope |
3.8 |
-0.0 |
0.0 |
-0.1 |
-0.0 |
0.0 |
0.3 |
0.2 |
0.2 |
interc |
1.9E+4 |
2.1E+0 |
8.4E-1 |
1.8E+3 |
4.2E+2 |
5.5E+2 |
1.9E+3 |
1.4E+4 |
5.6E+3 |
cps |
1.0E+4 |
9.1E-2 |
1.0E-1 |
1.8E+2 |
1.4E+1 |
5.7E+1 |
4.1E+2 |
2.8E+3 |
2.9E+3 |
rej1 |
  |
  |
  |
  |
  |
  |
  |
  |
  |
rej2 |
  |
  |
  |
  |
  |
  |
  |
  |
  |
RATIOS
  |
204/206 |
207/206 |
208/206 |
196/238 |
206/238 |
248/238 |
254/238 |
error +- |
-0.000056 |
0.076493 |
0.318362 |
25.248866 |
0.431703 |
6.793033 |
6.916655 |
ratio |
-Inf |
0.002318 |
0.006840 |
0.369679 |
0.007385 |
0.101577 |
0.104474 |
CALIBRATION
CALIBRATION
Zr20/U=1.3034 Pb/U=0.2257 UO/U=6.9737 (Pb/U=0.00902(UO/U)^2)
REDUCED DATA
  |
rad cor |
+- |
age Ma |
+- |
  |
uncorrected |
  |
  |
  |
  |
  |
Pb206/U238 |
0.1761 |
0.0061 |
1045.6292 |
33.4 |
  |
Pb207/Pb206 |
0.0765 |
0.0023 |
1108.0024 |
59.4 |
  |
Pb207/U235 |
1.8573 |
0.0907 |
1066.0249 |
31.7 |
  |
Pb208/Th232 |
0.0516 |
0.0024 |
1016.8652 |
45.6 |
  |
204 corrected |
  |
  |
  |
  |
  |
Pb206/U238 |
0.1763 |
Inf |
1046.4956 |
Inf |
  |
Pb207/Pb206 |
0.0773 |
Inf |
1128.6035 |
NaN |
  |
Pb207/U235 |
1.8783 |
Inf |
1073.4470 |
Inf |
  |
Pb208/Pb206 |
0.3201 |
Inf |
  |
  |
  |
Pb208/Th232 |
0.0519 |
Inf |
1023.0954 |
Inf |
  |
207 corrected |
  |
  |
  |
  |
  |
Pb206/U238 |
0.1756 |
0.0061 |
1043.1186 |
33.4 |
  |
Pb208/Pb206 |
0.3134 |
0.0090 |
  |
  |
  |
Pb208/Th232 |
0.0507 |
0.0025 |
998.8042 |
48.6 |
  |
208 corrected |
  |
  |
  |
  |
  |
Pb206/U238 |
0.1770 |
0.0062 |
1050.3196 |
33.9 |
  |
Pb207/Pb206 |
0.0808 |
0.0055 |
1215.9940 |
127.5 |
  |
Pb207/U235 |
1.9708 |
0.1576 |
1105.5859 |
52.5 |
  |
CONCENTRATIONS
CONCENTRATIONS
U:46.4 ppm Th:50.4 ppm Th/U:1.087 ±0.0 Pb204:-0.4 ppb sens 16.7


