SHRIMP II v2 SW v2.13 ACQUISITION DATA PRINTOUT
analyst GSWA, mount G14-21-1,
702-3.1, 2014-08-14, 21:15:39, 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=2077, z=2631
primary beam = -1.8nA
QT1 Y defl = -1732 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 |
195.82451 |
0.00000 |
2.0 |
8.0 |
12 |
YES 3.0 |
REF |
ALW |
COUNTER |
R 1.0E-12 |
2 |
Pb204 |
203.98251 |
0.00000 |
10.0 |
3.0 |
11 |
NO 10.0 |
NONE |
ALW |
COUNTER |
  |
3 |
Bkgrnd |
204.02751 |
0.00000 |
10.0 |
5.0 |
11 |
NO 0.5 |
BAC |
ALW |
COUNTER |
  |
4 |
Pb206 |
205.98798 |
0.00000 |
10.0 |
4.0 |
11 |
YES 6.0 |
REF |
ALW |
COUNTER |
R 1.0E-12 |
5 |
Pb207 |
206.99299 |
0.00000 |
30.0 |
2.0 |
11 |
NO 5.0 |
NONE |
ALW |
COUNTER |
FS+10mV=1Mcps=FIXED As |
6 |
Pb208 |
207.99599 |
0.00000 |
10.0 |
2.0 |
11 |
NO 4.0 |
NONE |
ALW |
COUNTER |
  |
7 |
U238 |
238.07446 |
0.00000 |
5.0 |
3.0 |
10 |
YES 3.0 |
REF |
ALW |
COUNTER |
  |
8 |
ThO248 |
248.05093 |
0.00000 |
5.0 |
3.0 |
9 |
YES 3.0 |
NONE |
ALW |
COUNTER |
  |
9 |
UO254 |
254.05658 |
0.00000 |
2.0 |
3.0 |
9 |
YES 2.0 |
REF |
ALW |
COUNTER |
  |
AMU-B calibration field offset -0.076 G.
DATA
Zr2O |
18309 |
  |
18699 |
  |
19585 |
  |
19777 |
  |
20166 |
  |
20616 |
  |
Pb204 |
3 |
  |
1 |
  |
2 |
  |
0 |
  |
1 |
  |
1 |
  |
Bkgrnd |
1 |
  |
1 |
  |
1 |
  |
0 |
  |
0 |
  |
-1 |
  |
Pb206 |
2699 |
  |
2628 |
  |
2455 |
  |
2485 |
  |
2449 |
  |
2380 |
  |
Pb207 |
615 |
  |
631 |
  |
527 |
  |
592 |
  |
533 |
  |
552 |
  |
Pb208 |
1151 |
  |
1107 |
  |
996 |
  |
1067 |
  |
992 |
  |
1008 |
  |
U238 |
2656 |
  |
2686 |
  |
2752 |
  |
2719 |
  |
2748 |
  |
2867 |
  |
ThO248 |
26725 |
  |
25458 |
  |
24790 |
  |
24177 |
  |
24323 |
  |
25478 |
  |
UO254 |
7995 |
  |
7783 |
  |
7719 |
  |
7703 |
  |
7794 |
  |
7932 |
  |
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 |
1.5 |
0.3 |
0.1 |
1.1 |
2.4 |
1.9 |
0.5 |
3.6 |
2.2 |
slope |
3.0 |
-0.0 |
-0.0 |
-0.4 |
-0.1 |
-0.2 |
0.2 |
-3.1 |
-0.1 |
interc |
1.8E+4 |
2.3E+0 |
1.3E+0 |
2.7E+3 |
6.2E+2 |
1.1E+3 |
2.6E+3 |
2.6E+4 |
7.9E+3 |
cps |
9.8E+3 |
1.3E-1 |
4.1E-2 |
2.5E+2 |
1.9E+1 |
1.1E+2 |
5.4E+2 |
5.0E+3 |
3.9E+3 |
rej1 |
  |
  |
-1 |
  |
  |
  |
  |
25478 |
  |
rej2 |
  |
  |
  |
  |
  |
  |
  |
26725 |
  |
RATIOS
  |
204/206 |
207/206 |
208/206 |
196/238 |
206/238 |
248/238 |
254/238 |
error +- |
0.000335 |
0.076340 |
0.422001 |
18.052694 |
0.462044 |
9.141316 |
7.184394 |
ratio |
0.000176 |
0.002130 |
0.008142 |
0.154535 |
0.005304 |
0.084011 |
0.074259 |
CALIBRATION
CALIBRATION
Zr20/U=1.3034 Pb/U=0.2257 UO/U=6.9737 (Pb/U=0.00895(UO/U)^2)
REDUCED DATA
  |
rad cor |
+- |
age Ma |
+- |
  |
uncorrected |
  |
  |
  |
  |
  |
Pb206/U238 |
0.1747 |
0.0041 |
1037.8988 |
22.6 |
  |
Pb207/Pb206 |
0.0763 |
0.0021 |
1103.9891 |
54.8 |
  |
Pb207/U235 |
1.8387 |
0.0713 |
1059.4072 |
25.2 |
  |
Pb208/Th232 |
0.0519 |
0.0017 |
1023.3811 |
33.4 |
  |
204 corrected |
  |
  |
  |
  |
  |
Pb206/U238 |
0.1738 |
0.0041 |
1032.7637 |
22.7 |
  |
Pb207/Pb206 |
0.0716 |
0.0035 |
973.8214 |
95.6 |
  |
Pb207/U235 |
1.7147 |
0.0969 |
1014.0407 |
35.6 |
  |
Pb208/Pb206 |
0.4123 |
0.0104 |
  |
  |
  |
Pb208/Th232 |
0.0505 |
0.0019 |
995.1452 |
36.2 |
  |
207 corrected |
  |
  |
  |
  |
  |
Pb206/U238 |
0.1742 |
0.0041 |
1035.0292 |
22.7 |
  |
Pb208/Pb206 |
0.4166 |
0.0098 |
  |
  |
  |
Pb208/Th232 |
0.0511 |
0.0019 |
1007.6046 |
35.6 |
  |
208 corrected |
  |
  |
  |
  |
  |
Pb206/U238 |
0.1753 |
0.0043 |
1041.1682 |
23.3 |
  |
Pb207/Pb206 |
0.0793 |
0.0058 |
1180.8756 |
137.9 |
  |
Pb207/U235 |
1.9178 |
0.1530 |
1087.2879 |
51.9 |
  |
CONCENTRATIONS
CONCENTRATIONS
U:66.5 ppm Th:94.4 ppm Th/U:1.419 ±0.0 Pb204:3.3 ppb sens 16.8


