SHRIMP II v2 SW v2.13 ACQUISITION DATA PRINTOUT
analyst GSWA, mount G14-21-1,
506-28.1, 2014-08-15, 06:59:52, 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=7991, y=1304, z=3504
primary beam = -1.9nA
QT1 Y defl = -1727 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 |
195.82369 |
0.00000 |
2.0 |
8.0 |
12 |
YES 3.0 |
REF |
ALW |
COUNTER |
R 1.0E-12 |
2 |
Pb204 |
203.98169 |
0.00000 |
10.0 |
3.0 |
11 |
NO 10.0 |
NONE |
ALW |
COUNTER |
  |
3 |
Bkgrnd |
204.02669 |
0.00000 |
10.0 |
5.0 |
11 |
NO 0.5 |
BAC |
ALW |
COUNTER |
  |
4 |
Pb206 |
205.98766 |
0.00000 |
10.0 |
4.0 |
11 |
YES 6.0 |
REF |
ALW |
COUNTER |
R 1.0E-12 |
5 |
Pb207 |
206.99266 |
0.00000 |
30.0 |
2.0 |
11 |
NO 5.0 |
NONE |
ALW |
COUNTER |
FS+10mV=1Mcps=FIXED As |
6 |
Pb208 |
207.99566 |
0.00000 |
10.0 |
2.0 |
11 |
NO 4.0 |
NONE |
ALW |
COUNTER |
  |
7 |
U238 |
238.07369 |
0.00000 |
5.0 |
3.0 |
10 |
YES 3.0 |
REF |
ALW |
COUNTER |
  |
8 |
ThO248 |
248.04962 |
0.00000 |
5.0 |
3.0 |
9 |
YES 3.0 |
NONE |
ALW |
COUNTER |
  |
9 |
UO254 |
254.05651 |
0.00000 |
2.0 |
3.0 |
9 |
YES 2.0 |
REF |
ALW |
COUNTER |
  |
AMU-B calibration field offset -0.076 G.
DATA
Zr2O |
19568 |
  |
20180 |
  |
20784 |
  |
21387 |
  |
21182 |
  |
21909 |
  |
Pb204 |
5 |
  |
1 |
  |
0 |
  |
2 |
  |
1 |
  |
1 |
  |
Bkgrnd |
2 |
  |
3 |
  |
0 |
  |
0 |
  |
0 |
  |
0 |
  |
Pb206 |
1857 |
  |
1754 |
  |
1857 |
  |
1674 |
  |
1738 |
  |
1698 |
  |
Pb207 |
471 |
  |
432 |
  |
457 |
R |
425 |
  |
414 |
  |
406 |
  |
Pb208 |
1049 |
  |
995 |
  |
952 |
  |
953 |
  |
897 |
  |
914 |
  |
U238 |
1633 |
  |
1692 |
  |
1739 |
  |
1697 |
  |
1825 |
  |
1762 |
  |
ThO248 |
20743 |
  |
20784 |
  |
20783 |
  |
20705 |
  |
20416 |
  |
20535 |
  |
UO254 |
4853 |
  |
4973 |
  |
5016 |
  |
5025 |
  |
4777 |
  |
4903 |
  |
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 |
3.2 |
0.9 |
0.2 |
2.2 |
0.4 |
0.5 |
1.1 |
0.5 |
2.4 |
slope |
2.8 |
-0.0 |
-0.0 |
-0.2 |
-0.1 |
-0.2 |
0.2 |
-0.4 |
-0.1 |
interc |
2.0E+4 |
3.1E+0 |
2.4E+0 |
1.8E+3 |
4.7E+2 |
1.1E+3 |
1.6E+3 |
2.1E+4 |
5.0E+3 |
cps |
1.0E+4 |
1.5E-1 |
7.6E-2 |
1.8E+2 |
1.5E+1 |
9.7E+1 |
3.4E+2 |
4.1E+3 |
2.5E+3 |
rej1 |
  |
  |
  |
  |
  |
  |
  |
  |
  |
rej2 |
  |
  |
  |
  |
  |
  |
  |
  |
  |
RATIOS
  |
204/206 |
207/206 |
208/206 |
196/238 |
206/238 |
248/238 |
254/238 |
error +- |
0.000444 |
0.082039 |
0.549144 |
30.613952 |
0.514797 |
12.086432 |
7.198532 |
ratio |
0.000344 |
0.001999 |
0.010725 |
0.347737 |
0.009081 |
0.127832 |
0.097764 |
CALIBRATION
CALIBRATION
Zr20/U=1.3034 Pb/U=0.2257 UO/U=6.9737 (Pb/U=0.00993(UO/U)^2)
REDUCED DATA
  |
rad cor |
+- |
age Ma |
+- |
  |
uncorrected |
  |
  |
  |
  |
  |
Pb206/U238 |
0.1939 |
0.0063 |
1142.3103 |
33.8 |
  |
Pb207/Pb206 |
0.0820 |
0.0020 |
1246.4442 |
47.0 |
  |
Pb207/U235 |
2.1930 |
0.0941 |
1178.8118 |
29.5 |
  |
Pb208/Th232 |
0.0568 |
0.0024 |
1116.9045 |
45.1 |
  |
204 corrected |
  |
  |
  |
  |
  |
Pb206/U238 |
0.1925 |
0.0063 |
1134.8618 |
34.1 |
  |
Pb207/Pb206 |
0.0757 |
0.0057 |
1088.1486 |
143.8 |
  |
Pb207/U235 |
2.0101 |
0.1724 |
1118.9400 |
56.5 |
  |
Pb208/Pb206 |
0.5371 |
0.0167 |
  |
  |
  |
Pb208/Th232 |
0.0552 |
0.0027 |
1085.5223 |
51.1 |
  |
207 corrected |
  |
  |
  |
  |
  |
Pb206/U238 |
0.1929 |
0.0063 |
1136.9707 |
33.8 |
  |
Pb208/Pb206 |
0.5405 |
0.0120 |
  |
  |
  |
Pb208/Th232 |
0.0556 |
0.0024 |
1094.4089 |
45.7 |
  |
208 corrected |
  |
  |
  |
  |
  |
Pb206/U238 |
0.1954 |
0.0065 |
1150.3755 |
35.2 |
  |
Pb207/Pb206 |
0.0888 |
0.0086 |
1399.1860 |
174.7 |
  |
Pb207/U235 |
2.3912 |
0.2538 |
1239.9627 |
73.3 |
  |
CONCENTRATIONS
CONCENTRATIONS
U:39.3 ppm Th:73.6 ppm Th/U:1.874 ±0.0 Pb204:2.9 ppb sens 17.1


