SHRIMP II v2 SW v2.13 ACQUISITION DATA PRINTOUT
analyst GSWA, mount G14-21-1,
506-3.1, 2014-08-14, 12:43:32, 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=1527, z=2280
primary beam = -1.8nA
QT1 Y defl = -1737 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 |
195.81693 |
0.00000 |
2.0 |
8.0 |
12 |
YES 3.0 |
REF |
ALW |
COUNTER |
R 1.0E-12 |
2 |
Pb204 |
203.97493 |
0.00000 |
10.0 |
3.0 |
11 |
NO 10.0 |
NONE |
ALW |
COUNTER |
  |
3 |
Bkgrnd |
204.01993 |
0.00000 |
10.0 |
5.0 |
11 |
NO 0.5 |
BAC |
ALW |
COUNTER |
  |
4 |
Pb206 |
205.98003 |
0.00000 |
10.0 |
4.0 |
11 |
YES 6.0 |
REF |
ALW |
COUNTER |
R 1.0E-12 |
5 |
Pb207 |
206.98504 |
0.00000 |
30.0 |
2.0 |
11 |
NO 5.0 |
NONE |
ALW |
COUNTER |
FS+10mV=1Mcps=FIXED As |
6 |
Pb208 |
207.98804 |
0.00000 |
10.0 |
2.0 |
11 |
NO 4.0 |
NONE |
ALW |
COUNTER |
  |
7 |
U238 |
238.06583 |
0.00000 |
5.0 |
3.0 |
10 |
YES 3.0 |
REF |
ALW |
COUNTER |
  |
8 |
ThO248 |
248.04240 |
0.00000 |
5.0 |
3.0 |
9 |
YES 3.0 |
NONE |
ALW |
COUNTER |
  |
9 |
UO254 |
254.04811 |
0.00000 |
2.0 |
3.0 |
9 |
YES 2.0 |
REF |
ALW |
COUNTER |
  |
AMU-B calibration field offset -0.076 G.
DATA
Zr2O |
18845 |
  |
19616 |
  |
20021 |
  |
20491 |
  |
20908 |
  |
20632 |
  |
Pb204 |
0 |
  |
1 |
  |
0 |
  |
0 |
  |
0 |
  |
0 |
  |
Bkgrnd |
0 |
  |
1 |
  |
1 |
  |
0 |
  |
0 |
  |
0 |
  |
Pb206 |
1520 |
  |
1584 |
  |
1551 |
  |
1549 |
  |
1508 |
  |
1510 |
  |
Pb207 |
433 |
  |
381 |
  |
398 |
  |
342 |
R |
357 |
  |
366 |
  |
Pb208 |
534 |
  |
511 |
  |
477 |
  |
457 |
  |
484 |
  |
452 |
  |
U238 |
1523 |
  |
1522 |
  |
1512 |
  |
1589 |
  |
1547 |
  |
1560 |
  |
ThO248 |
10697 |
  |
10604 |
  |
10463 |
  |
10474 |
  |
10514 |
  |
10420 |
  |
UO254 |
4469 |
  |
4313 |
  |
4328 |
  |
4299 |
  |
4185 |
  |
4178 |
R |
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 |
0.7 |
0.1 |
0.2 |
0.5 |
1.5 |
0.7 |
0.4 |
0.4 |
0.4 |
slope |
3.3 |
-0.0 |
-0.0 |
-0.1 |
-0.1 |
-0.1 |
0.1 |
-0.3 |
-0.3 |
interc |
1.9E+4 |
4.0E-1 |
6.5E-1 |
1.6E+3 |
4.2E+2 |
5.3E+2 |
1.5E+3 |
1.1E+4 |
4.5E+3 |
cps |
1.0E+4 |
1.5E-2 |
3.2E-2 |
1.5E+2 |
1.3E+1 |
4.9E+1 |
3.1E+2 |
2.1E+3 |
2.2E+3 |
rej1 |
20632 |
  |
  |
  |
  |
  |
  |
  |
  |
rej2 |
  |
  |
  |
  |
  |
  |
  |
  |
  |
RATIOS
  |
204/206 |
207/206 |
208/206 |
196/238 |
206/238 |
248/238 |
254/238 |
error +- |
-0.000112 |
0.082579 |
0.318910 |
33.125201 |
0.499634 |
6.861570 |
7.032936 |
ratio |
-0.000194 |
0.002299 |
0.006782 |
0.357448 |
0.007354 |
0.076399 |
0.085256 |
CALIBRATION
CALIBRATION
Zr20/U=1.3034 Pb/U=0.2257 UO/U=6.9737 (Pb/U=0.01010(UO/U)^2)
REDUCED DATA
  |
rad cor |
+- |
age Ma |
+- |
  |
uncorrected |
  |
  |
  |
  |
  |
Pb206/U238 |
0.1971 |
0.0056 |
1159.8611 |
30.0 |
  |
Pb207/Pb206 |
0.0826 |
0.0023 |
1259.2874 |
53.5 |
  |
Pb207/U235 |
2.2445 |
0.0946 |
1195.0592 |
29.2 |
  |
Pb208/Th232 |
0.0580 |
0.0023 |
1140.1721 |
43.3 |
  |
204 corrected |
  |
  |
  |
  |
  |
Pb206/U238 |
0.1975 |
0.0056 |
1161.7601 |
30.3 |
  |
Pb207/Pb206 |
0.0841 |
0.0038 |
1296.0126 |
84.7 |
  |
Pb207/U235 |
2.2913 |
0.1284 |
1209.5932 |
38.9 |
  |
Pb208/Pb206 |
0.3223 |
0.0097 |
  |
  |
  |
Pb208/Th232 |
0.0588 |
0.0026 |
1154.0286 |
50.0 |
  |
207 corrected |
  |
  |
  |
  |
  |
Pb206/U238 |
0.1962 |
0.0056 |
1155.0616 |
30.1 |
  |
Pb208/Pb206 |
0.3102 |
0.0090 |
  |
  |
  |
Pb208/Th232 |
0.0562 |
0.0025 |
1105.1284 |
47.1 |
  |
208 corrected |
  |
  |
  |
  |
  |
Pb206/U238 |
0.1977 |
0.0057 |
1163.0196 |
30.5 |
  |
Pb207/Pb206 |
0.0852 |
0.0049 |
1319.8268 |
108.4 |
  |
Pb207/U235 |
2.3223 |
0.1576 |
1219.1214 |
47.1 |
  |
CONCENTRATIONS
CONCENTRATIONS
U:35.7 ppm Th:38.7 ppm Th/U:1.083 ±0.0 Pb204:-0.7 ppb sens 17.5


