SHRIMP II v2 SW v2.13 ACQUISITION DATA PRINTOUT
analyst GSWA, mount G14-21-1,
506-6.1, 2014-08-14, 13:59:35, 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=1467, z=2462
primary beam = -1.8nA
QT1 Y defl = -1722 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 |
195.81668 |
0.00000 |
2.0 |
8.0 |
12 |
YES 3.0 |
REF |
ALW |
COUNTER |
R 1.0E-12 |
2 |
Pb204 |
203.97468 |
0.00000 |
10.0 |
3.0 |
11 |
NO 10.0 |
NONE |
ALW |
COUNTER |
  |
3 |
Bkgrnd |
204.01968 |
0.00000 |
10.0 |
5.0 |
11 |
NO 0.5 |
BAC |
ALW |
COUNTER |
  |
4 |
Pb206 |
205.98107 |
0.00000 |
10.0 |
4.0 |
11 |
YES 6.0 |
REF |
ALW |
COUNTER |
R 1.0E-12 |
5 |
Pb207 |
206.98608 |
0.00000 |
30.0 |
2.0 |
11 |
NO 5.0 |
NONE |
ALW |
COUNTER |
FS+10mV=1Mcps=FIXED As |
6 |
Pb208 |
207.98908 |
0.00000 |
10.0 |
2.0 |
11 |
NO 4.0 |
NONE |
ALW |
COUNTER |
  |
7 |
U238 |
238.06663 |
0.00000 |
5.0 |
3.0 |
10 |
YES 3.0 |
REF |
ALW |
COUNTER |
  |
8 |
ThO248 |
248.04206 |
0.00000 |
5.0 |
3.0 |
9 |
YES 3.0 |
NONE |
ALW |
COUNTER |
  |
9 |
UO254 |
254.04768 |
0.00000 |
2.0 |
3.0 |
9 |
YES 2.0 |
REF |
ALW |
COUNTER |
  |
AMU-B calibration field offset -0.076 G.
DATA
Zr2O |
18737 |
  |
18683 |
  |
19663 |
  |
20369 |
  |
20473 |
  |
20989 |
R |
Pb204 |
1 |
  |
1 |
  |
0 |
  |
1 |
  |
0 |
  |
1 |
  |
Bkgrnd |
1 |
  |
0 |
  |
1 |
  |
0 |
  |
0 |
  |
0 |
  |
Pb206 |
1330 |
  |
1304 |
  |
1261 |
  |
1235 |
  |
1195 |
  |
1221 |
  |
Pb207 |
360 |
  |
320 |
  |
326 |
  |
331 |
  |
320 |
  |
281 |
  |
Pb208 |
509 |
  |
496 |
  |
501 |
  |
480 |
  |
477 |
  |
461 |
  |
U238 |
1122 |
  |
1151 |
  |
1189 |
  |
1283 |
  |
1190 |
  |
1238 |
  |
ThO248 |
9969 |
  |
9900 |
  |
10208 |
  |
10082 |
  |
9983 |
  |
10319 |
  |
UO254 |
3473 |
  |
3492 |
  |
3573 |
  |
3499 |
  |
3460 |
  |
3451 |
  |
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 |
3.8 |
0.1 |
0.1 |
0.3 |
0.8 |
0.1 |
1.6 |
1.9 |
0.6 |
slope |
3.2 |
-0.0 |
-0.0 |
-0.2 |
-0.1 |
-0.1 |
0.1 |
0.3 |
-0.1 |
interc |
1.9E+4 |
8.2E-1 |
8.2E-1 |
1.3E+3 |
3.6E+2 |
5.2E+2 |
1.1E+3 |
9.9E+3 |
3.5E+3 |
cps |
1.0E+4 |
6.5E-2 |
3.1E-2 |
1.3E+2 |
1.1E+1 |
4.9E+1 |
2.4E+2 |
2.0E+3 |
1.7E+3 |
rej1 |
  |
  |
  |
  |
  |
  |
  |
  |
  |
rej2 |
  |
  |
  |
  |
  |
  |
  |
  |
  |
RATIOS
  |
204/206 |
207/206 |
208/206 |
196/238 |
206/238 |
248/238 |
254/238 |
error +- |
0.000272 |
0.085842 |
0.389490 |
42.099503 |
0.530334 |
8.474651 |
7.370404 |
ratio |
0.000333 |
0.002189 |
0.008492 |
0.670654 |
0.009986 |
0.134970 |
0.121037 |
CALIBRATION
CALIBRATION
Zr20/U=1.3034 Pb/U=0.2257 UO/U=6.9737 (Pb/U=0.00976(UO/U)^2)
REDUCED DATA
  |
rad cor |
+- |
age Ma |
+- |
  |
uncorrected |
  |
  |
  |
  |
  |
Pb206/U238 |
0.1905 |
0.0072 |
1124.1688 |
38.9 |
  |
Pb207/Pb206 |
0.0858 |
0.0022 |
1334.6378 |
48.5 |
  |
Pb207/U235 |
2.2549 |
0.1087 |
1198.3278 |
33.4 |
  |
Pb208/Th232 |
0.0575 |
0.0028 |
1130.3777 |
54.1 |
  |
204 corrected |
  |
  |
  |
  |
  |
Pb206/U238 |
0.1897 |
0.0073 |
1119.6747 |
39.2 |
  |
Pb207/Pb206 |
0.0820 |
0.0056 |
1245.7813 |
128.3 |
  |
Pb207/U235 |
2.1449 |
0.1767 |
1163.4116 |
55.5 |
  |
Pb208/Pb206 |
0.3814 |
0.0148 |
  |
  |
  |
Pb208/Th232 |
0.0561 |
0.0033 |
1102.9667 |
63.3 |
  |
207 corrected |
  |
  |
  |
  |
  |
Pb206/U238 |
0.1886 |
0.0072 |
1113.7834 |
38.7 |
  |
Pb208/Pb206 |
0.3708 |
0.0103 |
  |
  |
  |
Pb208/Th232 |
0.0542 |
0.0028 |
1067.0061 |
54.2 |
  |
208 corrected |
  |
  |
  |
  |
  |
Pb206/U238 |
0.1903 |
0.0073 |
1122.9364 |
39.5 |
  |
Pb207/Pb206 |
0.0848 |
0.0068 |
1310.8511 |
148.2 |
  |
Pb207/U235 |
2.2248 |
0.2073 |
1188.8691 |
63.3 |
  |
CONCENTRATIONS
CONCENTRATIONS
U:29.0 ppm Th:37.4 ppm Th/U:1.290 ±0.0 Pb204:1.3 ppb sens 18.2


