SHRIMP II v2 SW v2.13 ACQUISITION DATA PRINTOUT
analyst GSWA, mount G14-21-1,
702-5.1, 2014-08-15, 00:34:51, 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=2179, z=2675
primary beam = -1.9nA
QT1 Y defl = -1730 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 |
195.82549 |
0.00000 |
2.0 |
8.0 |
12 |
YES 3.0 |
REF |
ALW |
COUNTER |
R 1.0E-12 |
2 |
Pb204 |
203.98349 |
0.00000 |
10.0 |
3.0 |
11 |
NO 10.0 |
NONE |
ALW |
COUNTER |
  |
3 |
Bkgrnd |
204.02849 |
0.00000 |
10.0 |
5.0 |
11 |
NO 0.5 |
BAC |
ALW |
COUNTER |
  |
4 |
Pb206 |
205.98835 |
0.00000 |
10.0 |
4.0 |
11 |
YES 6.0 |
REF |
ALW |
COUNTER |
R 1.0E-12 |
5 |
Pb207 |
206.99335 |
0.00000 |
30.0 |
2.0 |
11 |
NO 5.0 |
NONE |
ALW |
COUNTER |
FS+10mV=1Mcps=FIXED As |
6 |
Pb208 |
207.99635 |
0.00000 |
10.0 |
2.0 |
11 |
NO 4.0 |
NONE |
ALW |
COUNTER |
  |
7 |
U238 |
238.07458 |
0.00000 |
5.0 |
3.0 |
10 |
YES 3.0 |
REF |
ALW |
COUNTER |
  |
8 |
ThO248 |
248.05140 |
0.00000 |
5.0 |
3.0 |
9 |
YES 3.0 |
NONE |
ALW |
COUNTER |
  |
9 |
UO254 |
254.05799 |
0.00000 |
2.0 |
3.0 |
9 |
YES 2.0 |
REF |
ALW |
COUNTER |
  |
AMU-B calibration field offset -0.076 G.
DATA
Zr2O |
18833 |
  |
19657 |
  |
20397 |
  |
21247 |
  |
21355 |
  |
21653 |
  |
Pb204 |
1 |
  |
2 |
  |
1 |
  |
0 |
  |
2 |
  |
0 |
  |
Bkgrnd |
1 |
  |
1 |
  |
1 |
  |
1 |
  |
1 |
  |
1 |
  |
Pb206 |
5469 |
  |
5033 |
  |
4413 |
  |
3930 |
  |
4025 |
  |
4420 |
  |
Pb207 |
1264 |
  |
1089 |
  |
1014 |
  |
858 |
  |
901 |
  |
1006 |
  |
Pb208 |
2573 |
  |
2231 |
  |
1732 |
  |
1599 |
  |
1798 |
  |
2140 |
  |
U238 |
5422 |
  |
5062 |
  |
4722 |
  |
4461 |
  |
4776 |
  |
5163 |
  |
ThO248 |
59872 |
  |
49646 |
  |
41310 |
  |
37861 |
  |
46244 |
  |
52539 |
  |
UO254 |
15824 |
  |
14517 |
  |
13007 |
  |
12202 |
  |
13632 |
  |
15070 |
  |
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 |
2.3 |
0.3 |
0.0 |
39.3 |
2.2 |
63.6 |
26.6 |
1514.6 |
152.2 |
slope |
3.6 |
-0.0 |
-0.0 |
-1.6 |
-0.6 |
-0.7 |
-0.4 |
-9.4 |
-1.3 |
interc |
1.9E+4 |
1.5E+0 |
1.0E+0 |
5.3E+3 |
1.3E+3 |
2.3E+3 |
5.2E+3 |
5.3E+4 |
1.5E+4 |
cps |
1.0E+4 |
9.6E-2 |
1.0E-1 |
4.6E+2 |
3.4E+1 |
2.0E+2 |
9.9E+2 |
9.7E+3 |
7.1E+3 |
rej1 |
21247 |
  |
  |
  |
1006 |
  |
  |
  |
  |
rej2 |
  |
  |
  |
  |
858 |
  |
  |
  |
  |
RATIOS
  |
204/206 |
207/206 |
208/206 |
196/238 |
206/238 |
248/238 |
254/238 |
error +- |
-0.000009 |
0.073563 |
0.448987 |
10.376860 |
0.458567 |
9.802778 |
7.134188 |
ratio |
-Inf |
0.003127 |
0.036797 |
0.314330 |
0.022180 |
0.769831 |
0.371027 |
CALIBRATION
CALIBRATION
Zr20/U=1.3034 Pb/U=0.2257 UO/U=6.9737 (Pb/U=0.00901(UO/U)^2)
REDUCED DATA
  |
rad cor |
+- |
age Ma |
+- |
  |
uncorrected |
  |
  |
  |
  |
  |
Pb206/U238 |
0.1758 |
0.0202 |
1044.1204 |
109.6 |
  |
Pb207/Pb206 |
0.0736 |
0.0031 |
1029.5088 |
83.6 |
  |
Pb207/U235 |
1.7834 |
0.2269 |
1039.4073 |
79.6 |
  |
Pb208/Th232 |
0.0516 |
0.0087 |
1016.5530 |
167.4 |
  |
204 corrected |
  |
  |
  |
  |
  |
Pb206/U238 |
0.1758 |
Inf |
1044.2549 |
Inf |
  |
Pb207/Pb206 |
0.0737 |
Inf |
1032.9103 |
NaN |
  |
Pb207/U235 |
1.7866 |
Inf |
1040.5933 |
Inf |
  |
Pb208/Pb206 |
0.4492 |
Inf |
  |
  |
  |
Pb208/Th232 |
0.0516 |
Inf |
1017.2395 |
Inf |
  |
207 corrected |
  |
  |
  |
  |
  |
Pb206/U238 |
0.1759 |
0.0202 |
1044.7058 |
109.7 |
  |
Pb208/Pb206 |
0.4501 |
0.0376 |
  |
  |
  |
Pb208/Th232 |
0.0517 |
0.0088 |
1019.5412 |
168.7 |
  |
208 corrected |
  |
  |
  |
  |
  |
Pb206/U238 |
0.1771 |
0.0211 |
1050.9321 |
114.5 |
  |
Pb207/Pb206 |
0.0798 |
0.0312 |
1192.0270 |
623.1 |
  |
Pb207/U235 |
1.9482 |
0.8225 |
1097.8325 |
249.8 |
  |
CONCENTRATIONS
CONCENTRATIONS
U:115.1 ppm Th:176.2 ppm Th/U:1.530 ±0.1 Pb204:-0.2 ppb sens 16.9


