SHRIMP II v2 SW v2.13 ACQUISITION DATA PRINTOUT
analyst GSWA, mount G14-21-1,
OGC-3.1, 2014-08-14, 19:08:26, 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=1825, z=2739
primary beam = -1.7nA
QT1 Y defl = -1729 bits; QT1 Z defl = 400 bits
runtable 2014-08-14 GSWA 0955
duration: 15min 28sec (928sec)
RUN TABLE
# |
Name |
AMU |
AMU Offset |
Time s |
Delay s |
Coll Focus |
Centering |
Ref |
Cent |
Detector |
CUP Mode setting |
1 |
Zr2O |
195.82295 |
0.00000 |
2.0 |
8.0 |
12 |
YES 3.0 |
REF |
ALW |
COUNTER |
R 1.0E-12 |
2 |
Pb204 |
203.98095 |
0.00000 |
10.0 |
3.0 |
11 |
NO 10.0 |
NONE |
ALW |
COUNTER |
  |
3 |
Bkgrnd |
204.02595 |
0.00000 |
10.0 |
5.0 |
11 |
NO 0.5 |
BAC |
ALW |
COUNTER |
  |
4 |
Pb206 |
205.98622 |
0.00000 |
10.0 |
4.0 |
11 |
YES 6.0 |
REF |
ALW |
COUNTER |
R 1.0E-12 |
5 |
Pb207 |
206.99122 |
0.00000 |
30.0 |
2.0 |
11 |
NO 5.0 |
NONE |
ALW |
COUNTER |
FS+10mV=1Mcps=FIXED As |
6 |
Pb208 |
207.99422 |
0.00000 |
10.0 |
2.0 |
11 |
NO 4.0 |
NONE |
ALW |
COUNTER |
  |
7 |
U238 |
238.07350 |
0.00000 |
5.0 |
3.0 |
10 |
YES 3.0 |
REF |
ALW |
COUNTER |
  |
8 |
ThO248 |
248.04923 |
0.00000 |
5.0 |
3.0 |
9 |
YES 3.0 |
NONE |
ALW |
COUNTER |
  |
9 |
UO254 |
254.05577 |
0.00000 |
2.0 |
3.0 |
9 |
YES 2.0 |
REF |
ALW |
COUNTER |
  |
AMU-B calibration field offset -0.076 G.
DATA
Zr2O |
18258 |
  |
18658 |
  |
19203 |
  |
19614 |
  |
19286 |
  |
19796 |
  |
Pb204 |
3 |
  |
6 |
  |
3 |
  |
1 |
  |
2 |
  |
0 |
  |
Bkgrnd |
0 |
  |
0 |
  |
0 |
  |
0 |
  |
0 |
  |
0 |
  |
Pb206 |
17013 |
  |
16910 |
  |
16381 |
  |
16016 |
  |
15673 |
  |
15271 |
  |
Pb207 |
15359 |
  |
15126 |
  |
14400 |
  |
14047 |
  |
13882 |
  |
13751 |
  |
Pb208 |
2539 |
  |
2577 |
  |
2455 |
  |
2384 |
  |
2401 |
  |
2355 |
  |
U238 |
4636 |
  |
4796 |
  |
4741 |
  |
4772 |
  |
4738 |
  |
4719 |
R |
ThO248 |
18117 |
  |
17975 |
  |
17520 |
  |
17185 |
  |
17209 |
  |
17204 |
  |
UO254 |
13361 |
  |
13060 |
  |
12886 |
  |
12575 |
  |
12751 |
  |
12828 |
  |
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 |
0.8 |
0.0 |
0.5 |
2.7 |
0.7 |
0.7 |
1.9 |
3.0 |
slope |
1.9 |
-0.0 |
-0.0 |
-2.4 |
-2.3 |
-0.3 |
0.1 |
-1.3 |
-0.7 |
interc |
1.8E+4 |
4.7E+0 |
-0.0E+0 |
1.7E+4 |
1.6E+4 |
2.6E+3 |
4.7E+3 |
1.8E+4 |
1.3E+4 |
cps |
9.6E+3 |
2.3E-1 |
-0.0E+0 |
1.6E+3 |
4.8E+2 |
2.5E+2 |
9.5E+2 |
3.5E+3 |
6.5E+3 |
rej1 |
  |
  |
  |
  |
  |
  |
  |
  |
  |
rej2 |
  |
  |
  |
  |
  |
  |
  |
  |
  |
RATIOS
  |
204/206 |
207/206 |
208/206 |
196/238 |
206/238 |
248/238 |
254/238 |
error +- |
0.000142 |
0.297738 |
0.152037 |
10.158850 |
1.714047 |
3.729168 |
6.857439 |
ratio |
0.000037 |
0.001930 |
0.001345 |
0.082055 |
0.011561 |
0.027158 |
0.058916 |
CALIBRATION
CALIBRATION
Zr20/U=1.3034 Pb/U=0.2257 UO/U=6.9737 (Pb/U=0.03645(UO/U)^2)
REDUCED DATA
  |
rad cor |
+- |
age Ma |
+- |
  |
uncorrected |
  |
  |
  |
  |
  |
Pb206/U238 |
0.7113 |
0.0131 |
3463.4218 |
49.3 |
  |
Pb207/Pb206 |
0.2977 |
0.0019 |
3458.4961 |
10.0 |
  |
Pb207/U235 |
29.2011 |
0.5932 |
3460.3018 |
19.8 |
  |
Pb208/Th232 |
0.1801 |
0.0042 |
3346.8444 |
71.9 |
  |
204 corrected |
  |
  |
  |
  |
  |
Pb206/U238 |
0.7097 |
0.0131 |
3457.3216 |
49.2 |
  |
Pb207/Pb206 |
0.2962 |
0.0020 |
3450.5875 |
10.5 |
  |
Pb207/U235 |
28.9864 |
0.5933 |
3453.0593 |
19.9 |
  |
Pb208/Pb206 |
0.1473 |
0.0019 |
  |
  |
  |
Pb208/Th232 |
0.1741 |
0.0044 |
3243.7030 |
75.2 |
  |
207 corrected |
  |
  |
  |
  |
  |
Pb206/U238 |
0.7111 |
0.0133 |
3462.5123 |
49.9 |
  |
Pb208/Pb206 |
0.1513 |
0.0066 |
  |
  |
  |
Pb208/Th232 |
0.1792 |
0.0088 |
3331.4938 |
149.8 |
  |
208 corrected |
  |
  |
  |
  |
  |
Pb206/U238 |
0.7133 |
0.0132 |
3470.8748 |
49.4 |
  |
Pb207/Pb206 |
0.2996 |
0.0022 |
3468.0597 |
11.4 |
  |
Pb207/U235 |
29.4636 |
0.6114 |
3469.0901 |
20.2 |
  |
CONCENTRATIONS
CONCENTRATIONS
U:114.6 ppm Th:68.8 ppm Th/U:0.601 ±0.0 Pb204:9.9 ppb sens 16.7


