SHRIMP II v2 SW v2.13 ACQUISITION DATA PRINTOUT
analyst GSWA, mount G14-21-1,
506-9.1, 2014-08-14, 15:34:54, 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=7978, y=1362, z=2657
primary beam = -1.8nA
QT1 Y defl = -1704 bits; QT1 Z defl = 385 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 |
195.81805 |
0.00000 |
2.0 |
8.0 |
12 |
YES 3.0 |
REF |
ALW |
COUNTER |
R 1.0E-12 |
2 |
Pb204 |
203.97605 |
0.00000 |
10.0 |
3.0 |
11 |
NO 10.0 |
NONE |
ALW |
COUNTER |
  |
3 |
Bkgrnd |
204.02105 |
0.00000 |
10.0 |
5.0 |
11 |
NO 0.5 |
BAC |
ALW |
COUNTER |
  |
4 |
Pb206 |
205.98155 |
0.00000 |
10.0 |
4.0 |
11 |
YES 6.0 |
REF |
ALW |
COUNTER |
R 1.0E-12 |
5 |
Pb207 |
206.98656 |
0.00000 |
30.0 |
2.0 |
11 |
NO 5.0 |
NONE |
ALW |
COUNTER |
FS+10mV=1Mcps=FIXED As |
6 |
Pb208 |
207.98956 |
0.00000 |
10.0 |
2.0 |
11 |
NO 4.0 |
NONE |
ALW |
COUNTER |
  |
7 |
U238 |
238.06642 |
0.00000 |
5.0 |
3.0 |
10 |
YES 3.0 |
REF |
ALW |
COUNTER |
  |
8 |
ThO248 |
248.04257 |
0.00000 |
5.0 |
3.0 |
9 |
YES 3.0 |
NONE |
ALW |
COUNTER |
  |
9 |
UO254 |
254.04905 |
0.00000 |
2.0 |
3.0 |
9 |
YES 2.0 |
REF |
ALW |
COUNTER |
  |
AMU-B calibration field offset -0.076 G.
DATA
Zr2O |
18890 |
  |
18772 |
  |
19707 |
  |
20095 |
  |
20302 |
  |
20267 |
  |
Pb204 |
1 |
  |
1 |
  |
3 |
  |
2 |
  |
0 |
  |
0 |
  |
Bkgrnd |
2 |
  |
1 |
  |
0 |
  |
2 |
  |
1 |
  |
0 |
  |
Pb206 |
1853 |
  |
1850 |
  |
1769 |
  |
1754 |
  |
1659 |
  |
1669 |
R |
Pb207 |
467 |
  |
434 |
  |
439 |
  |
399 |
  |
406 |
  |
411 |
  |
Pb208 |
778 |
  |
751 |
  |
691 |
  |
738 |
  |
690 |
  |
693 |
  |
U238 |
1701 |
  |
1776 |
  |
1790 |
  |
1778 |
  |
1757 |
  |
1908 |
  |
ThO248 |
15503 |
  |
15390 |
  |
15294 |
  |
15351 |
  |
15429 |
  |
15279 |
  |
UO254 |
5165 |
  |
4910 |
  |
4818 |
  |
5039 |
  |
4902 |
  |
5002 |
  |
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 |
4.4 |
0.6 |
0.2 |
0.4 |
0.6 |
0.9 |
1.4 |
0.4 |
3.5 |
slope |
2.2 |
-0.0 |
-0.0 |
-0.3 |
-0.1 |
-0.1 |
0.2 |
-0.2 |
-0.1 |
interc |
1.9E+4 |
1.9E+0 |
1.6E+0 |
1.9E+3 |
4.6E+2 |
7.8E+2 |
1.7E+3 |
1.5E+4 |
5.0E+3 |
cps |
9.9E+3 |
1.1E-1 |
9.7E-2 |
1.8E+2 |
1.4E+1 |
7.3E+1 |
3.5E+2 |
3.1E+3 |
2.5E+3 |
rej1 |
  |
  |
  |
  |
  |
  |
  |
  |
  |
rej2 |
  |
  |
  |
  |
  |
  |
  |
  |
  |
RATIOS
  |
204/206 |
207/206 |
208/206 |
196/238 |
206/238 |
248/238 |
254/238 |
error +- |
0.000077 |
0.080551 |
0.413696 |
27.884762 |
0.496065 |
8.680047 |
7.026912 |
ratio |
0.000279 |
0.001781 |
0.007472 |
0.357470 |
0.007390 |
0.101921 |
0.109879 |
CALIBRATION
CALIBRATION
Zr20/U=1.3034 Pb/U=0.2257 UO/U=6.9737 (Pb/U=0.01005(UO/U)^2)
REDUCED DATA
  |
rad cor |
+- |
age Ma |
+- |
  |
uncorrected |
  |
  |
  |
  |
  |
Pb206/U238 |
0.1961 |
0.0068 |
1154.0828 |
36.5 |
  |
Pb207/Pb206 |
0.0806 |
0.0018 |
1210.5197 |
42.9 |
  |
Pb207/U235 |
2.1774 |
0.0944 |
1173.8624 |
29.7 |
  |
Pb208/Th232 |
0.0591 |
0.0026 |
1161.4307 |
49.2 |
  |
204 corrected |
  |
  |
  |
  |
  |
Pb206/U238 |
0.1958 |
0.0068 |
1152.7725 |
36.8 |
  |
Pb207/Pb206 |
0.0795 |
0.0047 |
1183.5503 |
112.0 |
  |
Pb207/U235 |
2.1452 |
0.1545 |
1163.5083 |
48.7 |
  |
Pb208/Pb206 |
0.4114 |
0.0126 |
  |
  |
  |
Pb208/Th232 |
0.0587 |
0.0030 |
1153.8906 |
56.5 |
  |
207 corrected |
  |
  |
  |
  |
  |
Pb206/U238 |
0.1955 |
0.0068 |
1151.3086 |
36.5 |
  |
Pb208/Pb206 |
0.4089 |
0.0088 |
  |
  |
  |
Pb208/Th232 |
0.0583 |
0.0026 |
1145.4649 |
50.3 |
  |
208 corrected |
  |
  |
  |
  |
  |
Pb206/U238 |
0.1958 |
0.0069 |
1152.5171 |
37.0 |
  |
Pb207/Pb206 |
0.0792 |
0.0061 |
1178.2309 |
145.1 |
  |
Pb207/U235 |
2.1389 |
0.1893 |
1161.4782 |
59.5 |
  |
CONCENTRATIONS
CONCENTRATIONS
U:42.4 ppm Th:58.2 ppm Th/U:1.371 ±0.0 Pb204:0.6 ppb sens 17.4


