SHRIMP II v2 SW v2.13 ACQUISITION DATA PRINTOUT
analyst GSWA, mount G14-21-1,
702-15.1, 2014-08-15, 09:02:00, 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=2243, z=2992
primary beam = -2.0nA
QT1 Y defl = -1706 bits; QT1 Z defl = 400 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 |
195.82491 |
0.00000 |
2.0 |
8.0 |
12 |
YES 3.0 |
REF |
ALW |
COUNTER |
R 1.0E-12 |
2 |
Pb204 |
203.98291 |
0.00000 |
10.0 |
3.0 |
11 |
NO 10.0 |
NONE |
ALW |
COUNTER |
  |
3 |
Bkgrnd |
204.02791 |
0.00000 |
10.0 |
5.0 |
11 |
NO 0.5 |
BAC |
ALW |
COUNTER |
  |
4 |
Pb206 |
205.98786 |
0.00000 |
10.0 |
4.0 |
11 |
YES 6.0 |
REF |
ALW |
COUNTER |
R 1.0E-12 |
5 |
Pb207 |
206.99286 |
0.00000 |
30.0 |
2.0 |
11 |
NO 5.0 |
NONE |
ALW |
COUNTER |
FS+10mV=1Mcps=FIXED As |
6 |
Pb208 |
207.99586 |
0.00000 |
10.0 |
2.0 |
11 |
NO 4.0 |
NONE |
ALW |
COUNTER |
  |
7 |
U238 |
238.07362 |
0.00000 |
5.0 |
3.0 |
10 |
YES 3.0 |
REF |
ALW |
COUNTER |
  |
8 |
ThO248 |
248.05051 |
0.00000 |
5.0 |
3.0 |
9 |
YES 3.0 |
NONE |
ALW |
COUNTER |
  |
9 |
UO254 |
254.05688 |
0.00000 |
2.0 |
3.0 |
9 |
YES 2.0 |
REF |
ALW |
COUNTER |
  |
AMU-B calibration field offset -0.076 G.
DATA
Zr2O |
20413 |
  |
20899 |
  |
21540 |
  |
21585 |
  |
22182 |
  |
22422 |
  |
Pb204 |
1 |
  |
0 |
  |
0 |
  |
0 |
  |
2 |
  |
2 |
  |
Bkgrnd |
1 |
  |
0 |
  |
0 |
  |
0 |
  |
1 |
  |
0 |
  |
Pb206 |
13493 |
  |
13628 |
  |
13219 |
  |
12923 |
  |
12857 |
  |
12816 |
  |
Pb207 |
3044 |
  |
3127 |
  |
2818 |
  |
2966 |
  |
2836 |
  |
2833 |
  |
Pb208 |
6063 |
  |
5954 |
  |
5725 |
  |
5772 |
  |
5624 |
  |
5534 |
  |
U238 |
14078 |
  |
14775 |
  |
14879 |
  |
15066 |
  |
15115 |
  |
15306 |
  |
ThO248 |
142539 |
  |
142670 |
  |
141278 |
  |
141151 |
  |
142040 |
  |
144294 |
  |
UO254 |
41562 |
  |
41059 |
  |
40759 |
  |
41596 |
  |
41399 |
  |
41533 |
  |
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 |
0.3 |
0.2 |
1.6 |
3.3 |
0.6 |
2.7 |
3.1 |
3.2 |
slope |
2.6 |
0.0 |
-0.0 |
-1.1 |
-0.3 |
-0.7 |
1.4 |
-1.6 |
0.3 |
interc |
2.0E+4 |
-1.8E-2 |
4.9E-1 |
1.4E+4 |
3.1E+3 |
6.1E+3 |
1.4E+4 |
1.4E+5 |
4.1E+4 |
cps |
1.1E+4 |
9.1E-2 |
3.3E-2 |
1.3E+3 |
9.8E+1 |
5.8E+2 |
3.0E+3 |
2.8E+4 |
2.1E+4 |
rej1 |
  |
  |
  |
  |
  |
  |
  |
144294 |
  |
rej2 |
  |
  |
  |
  |
  |
  |
  |
  |
  |
RATIOS
  |
204/206 |
207/206 |
208/206 |
196/238 |
206/238 |
248/238 |
254/238 |
error +- |
0.000044 |
0.074599 |
0.441596 |
3.657878 |
0.445145 |
9.603212 |
6.983787 |
ratio |
0.000039 |
0.001072 |
0.003104 |
0.022501 |
0.003157 |
0.055476 |
0.045613 |
CALIBRATION
CALIBRATION
Zr20/U=1.3034 Pb/U=0.2257 UO/U=6.9737 (Pb/U=0.00913(UO/U)^2)
REDUCED DATA
  |
rad cor |
+- |
age Ma |
+- |
  |
uncorrected |
  |
  |
  |
  |
  |
Pb206/U238 |
0.1781 |
0.0026 |
1056.6313 |
14.5 |
  |
Pb207/Pb206 |
0.0746 |
0.0011 |
1057.7087 |
28.7 |
  |
Pb207/U235 |
1.8320 |
0.0402 |
1056.9827 |
14.3 |
  |
Pb208/Th232 |
0.0516 |
0.0010 |
1016.7862 |
18.4 |
  |
204 corrected |
  |
  |
  |
  |
  |
Pb206/U238 |
0.1780 |
0.0026 |
1055.9438 |
14.5 |
  |
Pb207/Pb206 |
0.0740 |
0.0012 |
1040.7151 |
33.2 |
  |
Pb207/U235 |
1.8153 |
0.0429 |
1050.9915 |
15.4 |
  |
Pb208/Pb206 |
0.4403 |
0.0034 |
  |
  |
  |
Pb208/Th232 |
0.0514 |
0.0010 |
1013.2560 |
18.7 |
  |
207 corrected |
  |
  |
  |
  |
  |
Pb206/U238 |
0.1781 |
0.0027 |
1056.5595 |
14.5 |
  |
Pb208/Pb206 |
0.4415 |
0.0041 |
  |
  |
  |
Pb208/Th232 |
0.0516 |
0.0010 |
1016.4175 |
19.5 |
  |
208 corrected |
  |
  |
  |
  |
  |
Pb206/U238 |
0.1799 |
0.0027 |
1066.4082 |
14.9 |
  |
Pb207/Pb206 |
0.0834 |
0.0030 |
1278.9962 |
67.5 |
  |
Pb207/U235 |
2.0691 |
0.0832 |
1138.6312 |
27.2 |
  |
CONCENTRATIONS
CONCENTRATIONS
U:322.1 ppm Th:491.0 ppm Th/U:1.524 ±0.0 Pb204:2.2 ppb sens 16.7


