SHRIMP II v2 SW v2.13 ACQUISITION DATA PRINTOUT
analyst GSWA, mount G14-21-1,
506-11.1, 2014-08-14, 16:12:53, 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=7984, y=1501, z=2747
primary beam = -1.7nA
QT1 Y defl = -1734 bits; QT1 Z defl = 385 bits
runtable 2014-08-14 GSWA 0955
duration: 15min 27sec (927sec)
RUN TABLE
# |
Name |
AMU |
AMU Offset |
Time s |
Delay s |
Coll Focus |
Centering |
Ref |
Cent |
Detector |
CUP Mode setting |
1 |
Zr2O |
195.81947 |
0.00000 |
2.0 |
8.0 |
12 |
YES 3.0 |
REF |
ALW |
COUNTER |
R 1.0E-12 |
2 |
Pb204 |
203.97747 |
0.00000 |
10.0 |
3.0 |
11 |
NO 10.0 |
NONE |
ALW |
COUNTER |
  |
3 |
Bkgrnd |
204.02247 |
0.00000 |
10.0 |
5.0 |
11 |
NO 0.5 |
BAC |
ALW |
COUNTER |
  |
4 |
Pb206 |
205.98380 |
0.00000 |
10.0 |
4.0 |
11 |
YES 6.0 |
REF |
ALW |
COUNTER |
R 1.0E-12 |
5 |
Pb207 |
206.98880 |
0.00000 |
30.0 |
2.0 |
11 |
NO 5.0 |
NONE |
ALW |
COUNTER |
FS+10mV=1Mcps=FIXED As |
6 |
Pb208 |
207.99180 |
0.00000 |
10.0 |
2.0 |
11 |
NO 4.0 |
NONE |
ALW |
COUNTER |
  |
7 |
U238 |
238.06898 |
0.00000 |
5.0 |
3.0 |
10 |
YES 3.0 |
REF |
ALW |
COUNTER |
  |
8 |
ThO248 |
248.04533 |
0.00000 |
5.0 |
3.0 |
9 |
YES 3.0 |
NONE |
ALW |
COUNTER |
  |
9 |
UO254 |
254.05096 |
0.00000 |
2.0 |
3.0 |
9 |
YES 2.0 |
REF |
ALW |
COUNTER |
  |
AMU-B calibration field offset -0.076 G.
DATA
Zr2O |
18346 |
  |
18528 |
  |
19009 |
  |
19815 |
  |
20443 |
  |
20261 |
  |
Pb204 |
2 |
  |
0 |
  |
1 |
  |
1 |
  |
1 |
  |
3 |
  |
Bkgrnd |
3 |
  |
1 |
  |
1 |
  |
1 |
  |
1 |
  |
0 |
  |
Pb206 |
2306 |
  |
2155 |
  |
2169 |
  |
2053 |
  |
2140 |
  |
2087 |
  |
Pb207 |
558 |
  |
567 |
  |
538 |
  |
505 |
  |
485 |
  |
553 |
  |
Pb208 |
1106 |
  |
1134 |
  |
1039 |
  |
1024 |
  |
1018 |
R |
999 |
  |
U238 |
2079 |
  |
2075 |
  |
2101 |
  |
2121 |
  |
2276 |
  |
2259 |
  |
ThO248 |
22465 |
  |
22409 |
  |
22414 |
  |
22262 |
R |
22236 |
  |
22434 |
R |
UO254 |
6138 |
  |
5986 |
  |
5986 |
  |
5991 |
  |
6087 |
  |
6077 |
  |
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 |
3.9 |
0.5 |
0.3 |
1.8 |
1.9 |
0.7 |
1.0 |
0.4 |
0.9 |
slope |
3.0 |
0.0 |
-0.0 |
-0.2 |
-0.1 |
-0.2 |
0.3 |
-0.2 |
0.0 |
interc |
1.8E+4 |
7.2E-1 |
2.4E+0 |
2.3E+3 |
5.6E+2 |
1.1E+3 |
2.0E+3 |
2.2E+4 |
6.0E+3 |
cps |
9.8E+3 |
1.4E-1 |
1.1E-1 |
2.2E+2 |
1.8E+1 |
1.1E+2 |
4.3E+2 |
4.5E+3 |
3.0E+3 |
rej1 |
  |
  |
  |
  |
  |
  |
  |
  |
  |
rej2 |
  |
  |
  |
  |
  |
  |
  |
  |
  |
RATIOS
  |
204/206 |
207/206 |
208/206 |
196/238 |
206/238 |
248/238 |
254/238 |
error +- |
0.000128 |
0.082505 |
0.492915 |
22.902330 |
0.504317 |
10.494001 |
7.084470 |
ratio |
0.000494 |
0.002240 |
0.008543 |
0.241442 |
0.007466 |
0.096768 |
0.072653 |
CALIBRATION
CALIBRATION
Zr20/U=1.3034 Pb/U=0.2257 UO/U=6.9737 (Pb/U=0.01005(UO/U)^2)
REDUCED DATA
  |
rad cor |
+- |
age Ma |
+- |
  |
uncorrected |
  |
  |
  |
  |
  |
Pb206/U238 |
0.1961 |
0.0050 |
1154.2775 |
26.7 |
  |
Pb207/Pb206 |
0.0825 |
0.0022 |
1257.5207 |
52.2 |
  |
Pb207/U235 |
2.2307 |
0.0878 |
1190.7256 |
27.2 |
  |
Pb208/Th232 |
0.0587 |
0.0020 |
1152.4190 |
37.6 |
  |
204 corrected |
  |
  |
  |
  |
  |
Pb206/U238 |
0.1957 |
0.0052 |
1152.1207 |
27.9 |
  |
Pb207/Pb206 |
0.0807 |
0.0080 |
1214.3136 |
182.6 |
  |
Pb207/U235 |
2.1776 |
0.2292 |
1173.9109 |
70.7 |
  |
Pb208/Pb206 |
0.4894 |
0.0200 |
  |
  |
  |
Pb208/Th232 |
0.0581 |
0.0029 |
1142.0829 |
56.1 |
  |
207 corrected |
  |
  |
  |
  |
  |
Pb206/U238 |
0.1951 |
0.0050 |
1149.1345 |
26.7 |
  |
Pb208/Pb206 |
0.4844 |
0.0104 |
  |
  |
  |
Pb208/Th232 |
0.0574 |
0.0021 |
1127.7684 |
39.4 |
  |
208 corrected |
  |
  |
  |
  |
  |
Pb206/U238 |
0.1962 |
0.0051 |
1154.7757 |
27.5 |
  |
Pb207/Pb206 |
0.0829 |
0.0065 |
1267.3076 |
145.4 |
  |
Pb207/U235 |
2.2429 |
0.1915 |
1194.5712 |
58.3 |
  |
CONCENTRATIONS
CONCENTRATIONS
U:51.9 ppm Th:85.5 ppm Th/U:1.647 ±0.0 Pb204:1.1 ppb sens 17.5


