SHRIMP II v2 SW v2.13 ACQUISITION DATA PRINTOUT
analyst GSWA, mount G14-21-1,
506-20.1, 2014-08-14, 23:32:44, 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=7986, y=1392, z=3374
primary beam = -1.9nA
QT1 Y defl = -1700 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 |
195.82577 |
0.00000 |
2.0 |
8.0 |
12 |
YES 3.0 |
REF |
ALW |
COUNTER |
R 1.0E-12 |
2 |
Pb204 |
203.98377 |
0.00000 |
10.0 |
3.0 |
11 |
NO 10.0 |
NONE |
ALW |
COUNTER |
  |
3 |
Bkgrnd |
204.02877 |
0.00000 |
10.0 |
5.0 |
11 |
NO 0.5 |
BAC |
ALW |
COUNTER |
  |
4 |
Pb206 |
205.98991 |
0.00000 |
10.0 |
4.0 |
11 |
YES 6.0 |
REF |
ALW |
COUNTER |
R 1.0E-12 |
5 |
Pb207 |
206.99491 |
0.00000 |
30.0 |
2.0 |
11 |
NO 5.0 |
NONE |
ALW |
COUNTER |
FS+10mV=1Mcps=FIXED As |
6 |
Pb208 |
207.99791 |
0.00000 |
10.0 |
2.0 |
11 |
NO 4.0 |
NONE |
ALW |
COUNTER |
  |
7 |
U238 |
238.07455 |
0.00000 |
5.0 |
3.0 |
10 |
YES 3.0 |
REF |
ALW |
COUNTER |
  |
8 |
ThO248 |
248.05200 |
0.00000 |
5.0 |
3.0 |
9 |
YES 3.0 |
NONE |
ALW |
COUNTER |
  |
9 |
UO254 |
254.05899 |
0.00000 |
2.0 |
3.0 |
9 |
YES 2.0 |
REF |
ALW |
COUNTER |
  |
AMU-B calibration field offset -0.076 G.
DATA
Zr2O |
19480 |
  |
19528 |
  |
20412 |
  |
20945 |
  |
21118 |
  |
21438 |
  |
Pb204 |
3 |
  |
0 |
  |
2 |
  |
3 |
  |
2 |
  |
2 |
  |
Bkgrnd |
1 |
  |
1 |
  |
1 |
  |
1 |
  |
0 |
  |
0 |
  |
Pb206 |
2542 |
  |
2555 |
  |
2522 |
  |
2363 |
  |
2424 |
  |
2399 |
  |
Pb207 |
640 |
R |
579 |
  |
592 |
  |
633 |
  |
614 |
R |
626 |
  |
Pb208 |
1134 |
  |
1068 |
  |
1070 |
  |
1082 |
  |
1011 |
  |
1089 |
  |
U238 |
2361 |
  |
2455 |
  |
2405 |
  |
2407 |
  |
2443 |
  |
2449 |
  |
ThO248 |
23226 |
  |
23206 |
R |
23068 |
  |
23499 |
  |
23488 |
  |
24001 |
  |
UO254 |
6848 |
  |
6864 |
  |
6959 |
  |
6886 |
  |
6931 |
  |
6915 |
  |
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 |
2.5 |
0.2 |
0.1 |
1.1 |
1.2 |
1.4 |
0.4 |
1.9 |
0.2 |
slope |
2.8 |
0.0 |
-0.0 |
-0.2 |
0.0 |
-0.1 |
0.1 |
1.0 |
0.1 |
interc |
1.9E+4 |
1.8E+0 |
1.3E+0 |
2.6E+3 |
6.1E+2 |
1.1E+3 |
2.4E+3 |
2.3E+4 |
6.9E+3 |
cps |
1.0E+4 |
2.0E-1 |
6.4E-2 |
2.5E+2 |
2.0E+1 |
1.1E+2 |
4.8E+2 |
4.7E+3 |
3.4E+3 |
rej1 |
  |
  |
  |
  |
  |
  |
  |
  |
  |
rej2 |
  |
  |
  |
  |
  |
  |
  |
  |
  |
RATIOS
  |
204/206 |
207/206 |
208/206 |
196/238 |
206/238 |
248/238 |
254/238 |
error +- |
0.000558 |
0.082641 |
0.437088 |
21.344782 |
0.510899 |
9.665077 |
7.135910 |
ratio |
0.000279 |
0.001632 |
0.007409 |
0.201243 |
0.006141 |
0.087722 |
0.068849 |
CALIBRATION
CALIBRATION
Zr20/U=1.3034 Pb/U=0.2257 UO/U=6.9737 (Pb/U=0.01003(UO/U)^2)
REDUCED DATA
  |
rad cor |
+- |
age Ma |
+- |
  |
uncorrected |
  |
  |
  |
  |
  |
Pb206/U238 |
0.1958 |
0.0045 |
1152.6902 |
24.0 |
  |
Pb207/Pb206 |
0.0826 |
0.0016 |
1260.7599 |
38.1 |
  |
Pb207/U235 |
2.2310 |
0.0712 |
1190.8338 |
22.1 |
  |
Pb208/Th232 |
0.0567 |
0.0018 |
1115.1809 |
33.9 |
  |
204 corrected |
  |
  |
  |
  |
  |
Pb206/U238 |
0.1940 |
0.0045 |
1143.2627 |
24.2 |
  |
Pb207/Pb206 |
0.0747 |
0.0046 |
1061.0909 |
119.7 |
  |
Pb207/U235 |
1.9993 |
0.1374 |
1115.2626 |
45.5 |
  |
Pb208/Pb206 |
0.4210 |
0.0127 |
  |
  |
  |
Pb208/Th232 |
0.0541 |
0.0022 |
1065.7488 |
41.7 |
  |
207 corrected |
  |
  |
  |
  |
  |
Pb206/U238 |
0.1947 |
0.0044 |
1146.9763 |
23.9 |
  |
Pb208/Pb206 |
0.4273 |
0.0086 |
  |
  |
  |
Pb208/Th232 |
0.0552 |
0.0018 |
1085.2264 |
35.0 |
  |
208 corrected |
  |
  |
  |
  |
  |
Pb206/U238 |
0.1975 |
0.0046 |
1161.6715 |
24.8 |
  |
Pb207/Pb206 |
0.0901 |
0.0054 |
1426.8902 |
110.6 |
  |
Pb207/U235 |
2.4521 |
0.1646 |
1258.0396 |
47.3 |
  |
CONCENTRATIONS
CONCENTRATIONS
U:56.0 ppm Th:84.5 ppm Th/U:1.509 ±0.0 Pb204:5.2 ppb sens 17.3


