SHRIMP II v2 SW v2.13 ACQUISITION DATA PRINTOUT
analyst GSWA, mount G14-21-1,
OGC-4.1, 2014-08-14, 20:36:16, 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=1859, z=2772
primary beam = -1.8nA
QT1 Y defl = -1729 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 |
195.82440 |
0.00000 |
2.0 |
8.0 |
12 |
YES 3.0 |
REF |
ALW |
COUNTER |
R 1.0E-12 |
2 |
Pb204 |
203.98240 |
0.00000 |
10.0 |
3.0 |
11 |
NO 10.0 |
NONE |
ALW |
COUNTER |
  |
3 |
Bkgrnd |
204.02740 |
0.00000 |
10.0 |
5.0 |
11 |
NO 0.5 |
BAC |
ALW |
COUNTER |
  |
4 |
Pb206 |
205.98818 |
0.00000 |
10.0 |
4.0 |
11 |
YES 6.0 |
REF |
ALW |
COUNTER |
R 1.0E-12 |
5 |
Pb207 |
206.99319 |
0.00000 |
30.0 |
2.0 |
11 |
NO 5.0 |
NONE |
ALW |
COUNTER |
FS+10mV=1Mcps=FIXED As |
6 |
Pb208 |
207.99619 |
0.00000 |
10.0 |
2.0 |
11 |
NO 4.0 |
NONE |
ALW |
COUNTER |
  |
7 |
U238 |
238.07372 |
0.00000 |
5.0 |
3.0 |
10 |
YES 3.0 |
REF |
ALW |
COUNTER |
  |
8 |
ThO248 |
248.04951 |
0.00000 |
5.0 |
3.0 |
9 |
YES 3.0 |
NONE |
ALW |
COUNTER |
  |
9 |
UO254 |
254.05629 |
0.00000 |
2.0 |
3.0 |
9 |
YES 2.0 |
REF |
ALW |
COUNTER |
  |
AMU-B calibration field offset -0.076 G.
DATA
Zr2O |
19371 |
  |
19844 |
  |
20476 |
  |
20701 |
  |
21230 |
  |
22021 |
  |
Pb204 |
1 |
  |
2 |
  |
3 |
  |
1 |
  |
1 |
  |
1 |
  |
Bkgrnd |
0 |
  |
0 |
  |
0 |
  |
0 |
  |
2 |
  |
3 |
  |
Pb206 |
25604 |
  |
25025 |
  |
24581 |
  |
24591 |
  |
24051 |
R |
24226 |
R |
Pb207 |
22405 |
  |
22393 |
  |
22247 |
  |
21850 |
  |
21978 |
  |
21819 |
  |
Pb208 |
6926 |
  |
6843 |
  |
6829 |
  |
6801 |
  |
6634 |
  |
6754 |
  |
U238 |
7340 |
  |
7457 |
  |
7548 |
  |
7554 |
  |
7834 |
  |
7753 |
  |
ThO248 |
49786 |
  |
49440 |
  |
49724 |
  |
50530 |
  |
50506 |
  |
51199 |
  |
UO254 |
20418 |
  |
20072 |
  |
20608 |
  |
20737 |
  |
20612 |
  |
20701 |
  |
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 |
0.4 |
0.0 |
2.2 |
0.6 |
0.6 |
0.7 |
2.1 |
2.0 |
slope |
3.3 |
-0.0 |
0.0 |
-1.8 |
-0.8 |
-0.3 |
0.6 |
2.1 |
0.6 |
interc |
1.9E+4 |
1.9E+0 |
-8.5E-1 |
2.6E+4 |
2.3E+4 |
6.9E+3 |
7.3E+3 |
4.9E+4 |
2.0E+4 |
cps |
1.0E+4 |
1.5E-1 |
9.1E-2 |
2.5E+3 |
7.4E+2 |
6.8E+2 |
1.5E+3 |
1.0E+4 |
1.0E+4 |
rej1 |
  |
  |
  |
  |
  |
  |
  |
  |
  |
rej2 |
  |
  |
  |
  |
  |
  |
  |
  |
  |
RATIOS
  |
204/206 |
207/206 |
208/206 |
196/238 |
206/238 |
248/238 |
254/238 |
error +- |
0.000022 |
0.298912 |
0.275920 |
6.881442 |
1.636414 |
6.634366 |
6.786066 |
ratio |
0.000021 |
0.001423 |
0.001737 |
0.037742 |
0.009968 |
0.035777 |
0.042058 |
CALIBRATION
CALIBRATION
Zr20/U=1.3034 Pb/U=0.2257 UO/U=6.9737 (Pb/U=0.03554(UO/U)^2)
REDUCED DATA
  |
rad cor |
+- |
age Ma |
+- |
  |
uncorrected |
  |
  |
  |
  |
  |
Pb206/U238 |
0.6935 |
0.0096 |
3395.8028 |
36.4 |
  |
Pb207/Pb206 |
0.2989 |
0.0014 |
3464.5929 |
7.4 |
  |
Pb207/U235 |
28.5802 |
0.4333 |
3439.2104 |
14.8 |
  |
Pb208/Th232 |
0.1776 |
0.0031 |
3304.6739 |
52.5 |
  |
204 corrected |
  |
  |
  |
  |
  |
Pb206/U238 |
0.6932 |
0.0096 |
3394.8524 |
36.4 |
  |
Pb207/Pb206 |
0.2987 |
0.0015 |
3463.3548 |
7.6 |
  |
Pb207/U235 |
28.5471 |
0.4346 |
3438.0734 |
14.8 |
  |
Pb208/Pb206 |
0.2752 |
0.0019 |
  |
  |
  |
Pb208/Th232 |
0.1771 |
0.0031 |
3295.8080 |
53.1 |
  |
207 corrected |
  |
  |
  |
  |
  |
Pb206/U238 |
0.6800 |
0.0095 |
3344.3604 |
36.4 |
  |
Pb208/Pb206 |
0.2373 |
0.0051 |
  |
  |
  |
Pb208/Th232 |
0.1498 |
0.0040 |
2821.0044 |
71.0 |
  |
208 corrected |
  |
  |
  |
  |
  |
Pb206/U238 |
0.6964 |
0.0097 |
3407.0160 |
36.7 |
  |
Pb207/Pb206 |
0.3017 |
0.0021 |
3479.0661 |
10.6 |
  |
Pb207/U235 |
28.9712 |
0.4707 |
3452.5433 |
15.8 |
  |
CONCENTRATIONS
CONCENTRATIONS
U:168.0 ppm Th:181.0 ppm Th/U:1.077 ±0.0 Pb204:2.2 ppb sens 16.6


