Research Article

Zircon U–Pb Dating and Lu-Hf Isotope of the Retrograded Eclogite from Chicheng, Northern Hebei Province, China

Table 3

Isotopic features of zircon Lu-Hf from the retrograded eclogite (sample 160601 and 160602).

Spot206Pb/238U age (Ma)176Yb/177Hf±(2δ)176Lu/177Hf±(2δ)176Hf/177Hf±(2δ)178Hf/177Hf±(2δ)εHf (t)TDM (Ma)

Sample 160601
1.1348.60.0002690.0000070.0000090.0000000.2828930.0000141.4679560.00005212.0495.8
2.1363.70.0001640.0000040.0000040.0000000.2830150.0000081.4678310.00003316.3326.7
4.1350.70.0006250.0000110.0000130.0000000.2827260.0000091.4680060.0000316.0725.8
5.1356.40.0003060.0000040.0000050.0000000.2828680.0000091.4679850.00002811.1529.7
6.1342.10.0001950.0000040.0000040.0000000.2828920.0000071.4680000.00002611.9497.8
7.1352.00.0003780.0000080.0000060.0000000.2828690.0000081.4680500.00002711.1529.0
8.1345.00.0006780.0000040.0000110.0000000.2828150.0000081.4680600.0000309.2603.0
9.1346.20.0001920.0000030.0000040.0000000.2829080.0000071.4680480.00002712.5475.2
10.1356.50.0001630.0000030.0000020.0000000.2830250.0000081.4680400.00002816.6312.7
11.1339.40.0004370.0000030.0000080.0000000.2829610.0000071.4680700.00003014.4402.0
13.1341.20.0006320.0000040.0000090.0000000.2829970.0000081.4679670.00002615.6351.7
14.1354.40.0001290.0000030.0000030.0000000.2829040.0000061.4679540.00002812.3480.8
15.1362.60.0003260.0000030.0000050.0000000.2829620.0000081.4679770.00002914.4399.7
16.1348.90.0001990.0000030.0000030.0000000.2829520.0000081.4680130.00002414.0414.0
17.1345.10.0001730.0000030.0000030.0000000.2829860.0000081.4680180.00002415.2367.3

Sample 160602
2.1340.60.0079920.0000180.0002790.0000010.2830090.0000131.4680030.00003815.9337.3
3.1325.10.0150060.0000640.0005590.0000050.2830690.0000121.4680010.00004518.0255.4
4.1347.40.0006330.0000040.0000120.0000000.2829460.0000091.4679740.00003013.7422.2
5.1333.10.0125290.0000780.0003130.0000030.2830080.0000121.4678990.00005215.8340.0
6.1352.00.0117900.0000830.0004380.0000040.2829820.0000101.4679960.00003614.9377.1
7.1358.30.0002620.0000040.0000050.0000000.2829210.0000081.4680390.00002512.8457.6
8.1350.90.0014800.0000550.0000430.0000010.2829480.0000091.4680460.00003313.8420.6
9.1338.40.0012130.0000230.0000270.0000000.2829740.0000101.4679410.00003414.7383.7
10.1333.90.0012000.0000080.0000240.0000000.2829720.0000101.4680160.00003014.6387.0