Research Article

Isotopic Age of the Xiong’er Group Volcanic Rocks and Its Geological Significance in Western Henan, China

Table 1

Zircon U–Pb isotope test results.

NumberThU206PbcAge (Ma)
ppm%207Pb/206Pb206Pb/238U

1314-1
11731601.110.260.770.110.90.311.1
21251151.120.700.800.111.30.311.8
338420.920.810.660.121.70.321.8
41102160.530.110.850.140.60.421.1
52625030.540.020.910.150.40.450.9
6941210.800.070.820.140.80.431.2
73003130.990.030.870.130.50.4110
8621310.490.200.820.140.80.411.2
9671290.540.100.820.140.80.431.2
101342140.650.040.940.150.60.441.7
11931590.610.070.720.151.00.441.1
122523640.720.010.890.140.50.430.9
13973840.260.540.830.130.50.290.9
141411281.130.370.740.111.00.321.2
1532390.841.180.720.113.60.314.1
1662960.670.120.840.141.20.411.8
CM3-5
134410.850.870.690.113.10.321.7
218270.680.000.640.122.20.312.0
330380.8324.220.130.1145.00.317.0
434410.840.730.660.112.80.321.7
520290.690.740.650.114.00.302.0
6113991.190.340.730.111.50.311.3
770730.991.260.660.123.20.321.5
833410.834.670.580.1310.00.312.6
951511.041.630.530.114.10.311.6
102582391.111.540.460.122.90.331.1
1143450.9921.440.270.1315.00.303.0
CM5
11151910.620.050.861.101.70.441.1
2365980.060.480.712.301.00.360.9
346461.030.440.683.302.00.321.6
41998770.242.920.172.402.60.241.5
5881090.844.060.184.102.30.291.8
633410.850.731.805.00.321.9
71291221.090.090.753.051.70.331.2
824320.780.770.713.261.90.302.2
950491.050.500.703.191.30.321.7
1049481.060.380.683.101.50.321.6
1131400.810.220.923.061.90.314.2
121381281.110.090.793.161.60.331.3
1323320.760.830.632.981.10.321.9
14961620.610.110.841.481.60.441.1

Note: Pbc and Pb indicate the common and radiogenic portions, respectively. indicates the error.