SHRIMP II v2 SW v2.13 ACQUISITION DATA PRINTOUT
analyst GSWA, mount G14-21-1,
702-1.1, 2014-08-14, 19:28:47, 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=7980, y=2080, z=2306
primary beam = -1.6nA
QT1 Y defl = -1723 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 195.82505 0.00000 2.0 8.0 12 YES 3.0 REF ALW COUNTER R 1.0E-12
2 Pb204 203.98304 0.00000 10.0 3.0 11 NO 10.0 NONE ALW COUNTER  
3 Bkgrnd 204.02804 0.00000 10.0 5.0 11 NO 0.5 BAC ALW COUNTER  
4 Pb206 205.98855 0.00000 10.0 4.0 11 YES 6.0 REF ALW COUNTER R 1.0E-12
5 Pb207 206.99355 0.00000 30.0 2.0 11 NO 5.0 NONE ALW COUNTER FS+10mV=1Mcps=FIXED As
6 Pb208 207.99655 0.00000 10.0 2.0 11 NO 4.0 NONE ALW COUNTER  
7 U238 238.07355 0.00000 5.0 3.0 10 YES 3.0 REF ALW COUNTER  
8 ThO248 248.05054 0.00000 5.0 3.0 9 YES 3.0 NONE ALW COUNTER  
9 UO254 254.05698 0.00000 2.0 3.0 9 YES 2.0 REF ALW COUNTER  
AMU-B calibration field offset -0.076 G.

DATA
Zr2O 16811   17203   17579   18266   18149   18380  
Pb204 1   1   2   1   1   3  
Bkgrnd 1   0   0   1   1   1  
Pb206 1663   1667   1670   1567   1592   1582  
Pb207 451   433   388   391   356   342  
Pb208 816   811   791   772   743   751  
U238 1763   1770   1858   1791   1910   1843  
ThO248 18971   19148   19039   18844   19554   19049 R
UO254 5044   5164   5020   4958   5047   4989  
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 2.5 0.4 0.1 0.6 0.3 0.1 1.1 3.5 0.9
slope 2.1 0.0 0.0 -0.1 -0.1 -0.1 0.1 0.3 -0.1
interc 1.7E+4 8.0E-1 3.5E-1 1.7E+3 4.6E+2 8.3E+2 1.8E+3 1.9E+4 5.1E+3
cps 8.9E+3 1.6E-1 6.8E-2 1.6E+2 1.3E+1 7.9E+1 3.6E+2 3.8E+3 2.5E+3
rej1                  
rej2                  

RATIOS
  204/206 207/206 208/206 196/238 206/238 248/238 254/238
error +- 0.000541 0.081138 0.483574 24.584477 0.447619 10.523415 6.961022
ratio 0.000390 0.001865 0.008607 0.279252 0.006455 0.122524 0.081862

CALIBRATION
CALIBRATION Zr20/U=1.3034 Pb/U=0.2257 UO/U=6.9737 (Pb/U=0.00924(UO/U)^2)

REDUCED DATA
  rad cor +- age Ma +-  
uncorrected          
Pb206/U238 0.1803 0.0050 1068.4573 27.1  
Pb207/Pb206 0.0811 0.0019 1224.7859 44.5  
Pb207/U235 2.0167 0.0767 1121.1654 25.5  
Pb208/Th232 0.0520 0.0019 1025.5670 36.7  
204 corrected          
Pb206/U238 0.1787 0.0051 1059.9242 27.6  
Pb207/Pb206 0.0734 0.0063 1026.2301 165.2  
Pb207/U235 1.8097 0.1702 1048.9701 59.7  
Pb208/Pb206 0.4683 0.0168      
Pb208/Th232 0.0500 0.0024 985.6159 46.6  
207 corrected          
Pb206/U238 0.1790 0.0050 1061.2867 27.0  
Pb208/Pb206 0.4708 0.0099      
Pb208/Th232 0.0503 0.0019 991.9967 37.3  
208 corrected          
Pb206/U238 0.1824 0.0052 1080.3034 28.2  
Pb207/Pb206 0.0916 0.0069 1459.4582 137.4  
Pb207/U235 2.3046 0.1938 1213.7146 57.9  

CONCENTRATIONS
CONCENTRATIONS U:47.8 ppm Th:80.1 ppm Th/U:1.675 ±0.0 Pb204:4.0 ppb sens 16.3