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