SHRIMP II v2 SW v2.13 ACQUISITION DATA PRINTOUT
analyst GSWA, mount G14-21-1,
702-9.1, 2014-08-15, 04:36:54, 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=2250, z=2803
primary beam = -1.9nA
QT1 Y defl = -1733 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 |
195.82502 |
0.00000 |
2.0 |
8.0 |
12 |
YES 3.0 |
REF |
ALW |
COUNTER |
R 1.0E-12 |
2 |
Pb204 |
203.98302 |
0.00000 |
10.0 |
3.0 |
11 |
NO 10.0 |
NONE |
ALW |
COUNTER |
  |
3 |
Bkgrnd |
204.02802 |
0.00000 |
10.0 |
5.0 |
11 |
NO 0.5 |
BAC |
ALW |
COUNTER |
  |
4 |
Pb206 |
205.98932 |
0.00000 |
10.0 |
4.0 |
11 |
YES 6.0 |
REF |
ALW |
COUNTER |
R 1.0E-12 |
5 |
Pb207 |
206.99432 |
0.00000 |
30.0 |
2.0 |
11 |
NO 5.0 |
NONE |
ALW |
COUNTER |
FS+10mV=1Mcps=FIXED As |
6 |
Pb208 |
207.99732 |
0.00000 |
10.0 |
2.0 |
11 |
NO 4.0 |
NONE |
ALW |
COUNTER |
  |
7 |
U238 |
238.07487 |
0.00000 |
5.0 |
3.0 |
10 |
YES 3.0 |
REF |
ALW |
COUNTER |
  |
8 |
ThO248 |
248.05145 |
0.00000 |
5.0 |
3.0 |
9 |
YES 3.0 |
NONE |
ALW |
COUNTER |
  |
9 |
UO254 |
254.05795 |
0.00000 |
2.0 |
3.0 |
9 |
YES 2.0 |
REF |
ALW |
COUNTER |
  |
AMU-B calibration field offset -0.076 G.
DATA
Zr2O |
18758 |
  |
18927 |
  |
19645 |
  |
20422 |
  |
20436 |
  |
20652 |
  |
Pb204 |
2 |
  |
2 |
  |
1 |
  |
0 |
  |
1 |
  |
2 |
  |
Bkgrnd |
0 |
  |
1 |
  |
1 |
  |
0 |
  |
0 |
  |
2 |
  |
Pb206 |
4510 |
  |
4482 |
  |
4363 |
  |
4356 |
  |
4328 |
R |
4303 |
  |
Pb207 |
1034 |
  |
1006 |
  |
1028 |
R |
1015 |
  |
959 |
  |
1007 |
  |
Pb208 |
1858 |
  |
1838 |
  |
1812 |
  |
1764 |
  |
1789 |
  |
1755 |
  |
U238 |
4471 |
  |
4692 |
  |
4681 |
  |
4788 |
  |
5025 |
  |
5002 |
  |
ThO248 |
43516 |
  |
43160 |
  |
42923 |
  |
42810 |
  |
43133 |
  |
42985 |
  |
UO254 |
13490 |
  |
13459 |
  |
13283 |
  |
13452 |
  |
13549 |
  |
13617 |
  |
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 |
3.4 |
0.2 |
0.2 |
0.2 |
0.6 |
0.2 |
1.0 |
1.1 |
0.9 |
slope |
2.7 |
-0.0 |
0.0 |
-0.3 |
-0.1 |
-0.1 |
0.7 |
-0.5 |
0.2 |
interc |
1.9E+4 |
1.6E+0 |
1.9E-1 |
4.5E+3 |
1.0E+3 |
1.9E+3 |
4.4E+3 |
4.3E+4 |
1.3E+4 |
cps |
1.0E+4 |
1.3E-1 |
6.9E-2 |
4.4E+2 |
3.4E+1 |
1.8E+2 |
9.5E+2 |
8.6E+3 |
6.7E+3 |
rej1 |
  |
  |
  |
  |
  |
  |
  |
  |
  |
rej2 |
  |
  |
  |
  |
  |
  |
  |
  |
  |
RATIOS
  |
204/206 |
207/206 |
208/206 |
196/238 |
206/238 |
248/238 |
254/238 |
error +- |
0.000141 |
0.076491 |
0.411900 |
10.534303 |
0.464061 |
9.117406 |
7.111826 |
ratio |
0.000122 |
0.001092 |
0.004706 |
0.084955 |
0.004007 |
0.058258 |
0.049758 |
CALIBRATION
CALIBRATION
Zr20/U=1.3034 Pb/U=0.2257 UO/U=6.9737 (Pb/U=0.00918(UO/U)^2)
REDUCED DATA
  |
rad cor |
+- |
age Ma |
+- |
  |
uncorrected |
  |
  |
  |
  |
  |
Pb206/U238 |
0.1791 |
0.0029 |
1061.7894 |
16.1 |
  |
Pb207/Pb206 |
0.0765 |
0.0011 |
1107.9548 |
28.3 |
  |
Pb207/U235 |
1.8884 |
0.0436 |
1077.0133 |
15.2 |
  |
Pb208/Th232 |
0.0517 |
0.0011 |
1018.5453 |
22.0 |
  |
204 corrected |
  |
  |
  |
  |
  |
Pb206/U238 |
0.1786 |
0.0030 |
1059.5834 |
16.2 |
  |
Pb207/Pb206 |
0.0745 |
0.0022 |
1054.8297 |
57.8 |
  |
Pb207/U235 |
1.8349 |
0.0649 |
1058.0310 |
23.0 |
  |
Pb208/Pb206 |
0.4078 |
0.0065 |
  |
  |
  |
Pb208/Th232 |
0.0511 |
0.0013 |
1006.4340 |
24.3 |
  |
207 corrected |
  |
  |
  |
  |
  |
Pb206/U238 |
0.1787 |
0.0029 |
1059.7774 |
16.1 |
  |
Pb208/Pb206 |
0.4082 |
0.0055 |
  |
  |
  |
Pb208/Th232 |
0.0511 |
0.0012 |
1007.4990 |
22.9 |
  |
208 corrected |
  |
  |
  |
  |
  |
Pb206/U238 |
0.1808 |
0.0030 |
1071.5524 |
16.6 |
  |
Pb207/Pb206 |
0.0852 |
0.0035 |
1320.9965 |
77.5 |
  |
Pb207/U235 |
2.1254 |
0.0983 |
1157.0806 |
31.4 |
  |
CONCENTRATIONS
CONCENTRATIONS
U:113.2 ppm Th:161.5 ppm Th/U:1.427 ±0.0 Pb204:2.4 ppb sens 16.2


