SHRIMP II v2 SW v2.13 ACQUISITION DATA PRINTOUT
analyst GSWA, mount G14-21-1,
BRB-2.1, 2014-08-14, 11:20:03, 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=7993, y=1847, z=3673
primary beam = -1.8nA
QT1 Y defl = -1694 bits; QT1 Z defl = 385 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 |
195.81705 |
0.00000 |
2.0 |
8.0 |
12 |
YES 3.0 |
REF |
ALW |
COUNTER |
R 1.0E-12 |
2 |
Pb204 |
203.97505 |
0.00000 |
10.0 |
3.0 |
11 |
NO 10.0 |
NONE |
ALW |
COUNTER |
  |
3 |
Bkgrnd |
204.02005 |
0.00000 |
10.0 |
5.0 |
11 |
NO 0.5 |
BAC |
ALW |
COUNTER |
  |
4 |
Pb206 |
205.98022 |
0.00000 |
10.0 |
4.0 |
11 |
YES 6.0 |
REF |
ALW |
COUNTER |
R 1.0E-12 |
5 |
Pb207 |
206.98522 |
0.00000 |
30.0 |
2.0 |
11 |
NO 5.0 |
NONE |
ALW |
COUNTER |
FS+10mV=1Mcps=FIXED As |
6 |
Pb208 |
207.98822 |
0.00000 |
10.0 |
2.0 |
11 |
NO 4.0 |
NONE |
ALW |
COUNTER |
  |
7 |
U238 |
238.06576 |
0.00000 |
5.0 |
3.0 |
10 |
YES 3.0 |
REF |
ALW |
COUNTER |
  |
8 |
ThO248 |
248.04085 |
0.00000 |
5.0 |
3.0 |
9 |
YES 3.0 |
NONE |
ALW |
COUNTER |
  |
9 |
UO254 |
254.04730 |
0.00000 |
2.0 |
3.0 |
9 |
YES 2.0 |
REF |
ALW |
COUNTER |
  |
AMU-B calibration field offset -0.076 G.
DATA
Zr2O |
19928 |
  |
20475 |
  |
21060 |
  |
21166 |
  |
21484 |
  |
22008 |
  |
Pb204 |
3 |
  |
0 |
  |
3 |
  |
1 |
  |
1 |
  |
0 |
  |
Bkgrnd |
0 |
  |
1 |
  |
0 |
  |
0 |
  |
0 |
  |
1 |
  |
Pb206 |
17943 |
  |
17969 |
  |
17532 |
  |
17639 |
  |
17177 |
  |
17028 |
  |
Pb207 |
3201 |
  |
3296 |
  |
3065 |
  |
3089 |
  |
3010 |
  |
2919 |
  |
Pb208 |
1241 |
  |
1238 |
  |
1215 |
  |
1189 |
  |
1203 |
  |
1213 |
  |
U238 |
38272 |
  |
38848 |
  |
39948 |
  |
39753 |
  |
40336 |
  |
40769 |
R |
ThO248 |
55898 |
  |
55895 |
  |
55945 |
  |
55847 |
  |
56341 |
  |
56101 |
  |
UO254 |
109389 |
  |
109758 |
  |
109996 |
  |
109597 |
  |
111544 |
  |
111034 |
  |
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 |
1.0 |
0.2 |
0.2 |
1.1 |
1.5 |
0.2 |
2.2 |
0.5 |
2.9 |
slope |
2.5 |
-0.0 |
0.0 |
-1.3 |
-0.4 |
-0.1 |
3.1 |
0.4 |
2.4 |
interc |
2.0E+4 |
2.4E+0 |
1.7E-1 |
1.8E+4 |
3.3E+3 |
1.2E+3 |
3.8E+4 |
5.6E+4 |
1.1E+5 |
cps |
1.1E+4 |
1.2E-1 |
3.4E-2 |
1.8E+3 |
1.0E+2 |
1.2E+2 |
7.9E+3 |
1.1E+4 |
5.5E+4 |
rej1 |
  |
  |
  |
  |
  |
  |
  |
  |
  |
rej2 |
  |
  |
  |
  |
  |
  |
  |
  |
  |
RATIOS
  |
204/206 |
207/206 |
208/206 |
196/238 |
206/238 |
248/238 |
254/238 |
error +- |
0.000051 |
0.058995 |
0.069433 |
1.339412 |
0.222429 |
1.418714 |
6.970440 |
ratio |
0.000027 |
0.000559 |
0.000845 |
0.005618 |
0.001000 |
0.004983 |
0.025821 |
CALIBRATION
CALIBRATION
Zr20/U=1.3034 Pb/U=0.2257 UO/U=6.9737 (Pb/U=0.00458(UO/U)^2)
REDUCED DATA
  |
rad cor |
+- |
age Ma |
+- |
  |
uncorrected |
  |
  |
  |
  |
  |
Pb206/U238 |
0.0893 |
0.0008 |
551.6210 |
4.6 |
  |
Pb207/Pb206 |
0.0590 |
0.0006 |
566.9161 |
20.5 |
  |
Pb207/U235 |
0.7267 |
0.0099 |
554.6131 |
5.8 |
  |
Pb208/Th232 |
0.0275 |
0.0004 |
548.3505 |
8.5 |
  |
204 corrected |
  |
  |
  |
  |
  |
Pb206/U238 |
0.0893 |
0.0008 |
551.1876 |
4.6 |
  |
Pb207/Pb206 |
0.0583 |
0.0007 |
539.3484 |
26.0 |
  |
Pb207/U235 |
0.7170 |
0.0112 |
548.8867 |
6.6 |
  |
Pb208/Pb206 |
0.0677 |
0.0013 |
  |
  |
  |
Pb208/Th232 |
0.0268 |
0.0006 |
534.1140 |
11.3 |
  |
207 corrected |
  |
  |
  |
  |
  |
Pb206/U238 |
0.0893 |
0.0008 |
551.3727 |
4.6 |
  |
Pb208/Pb206 |
0.0684 |
0.0016 |
  |
  |
  |
Pb208/Th232 |
0.0271 |
0.0007 |
540.1962 |
13.7 |
  |
208 corrected |
  |
  |
  |
  |
  |
Pb206/U238 |
0.0894 |
0.0008 |
551.7238 |
4.6 |
  |
Pb207/Pb206 |
0.0592 |
0.0007 |
573.3810 |
25.3 |
  |
Pb207/U235 |
0.7290 |
0.0112 |
555.9671 |
6.6 |
  |
CONCENTRATIONS
CONCENTRATIONS
U:878.5 ppm Th:198.1 ppm Th/U:0.226 ±0.0 Pb204:3.4 ppb sens 17.6


