Sm-Nd ISOTOPIC AGE OF LAMPROPHYRES IN THE GEZHEN GOLD-BEARING SHEAR ZONE ON HAINAN ISLAND AND ITS GEOLOGICAL IMPLICATIONS
作者：XU De-ru LIANG Xin-quan CHEN Guang-hao HUANG Zhi-long
摘要：Sm-Nd isotopic compositions of eight lamprophyre samples, which come from the Gezhen gold-bearing shear zone on western Hainan Island, are measured. The Sm-Nd isochron age is 495.98±13.14 Ma, (143Nd/144Nd) 0=0.512094, εNd(t) ranges from +1.80 to +2.00 and TDM from 982 Ma to 1196 Ma (average: 1060 Ma). The authors point out that the whole-rock Sm-Nd isochron age (495.98 ± 13.14 Ma) really represents the petrogenetic age of lamprophyre and the time of magmatism during subsequent subduction.
发文机构：Changsha Institute of Geotectonics Institute of Geochemistry
关键词：LAMPROPHYRESM-NDISOCHRONageGezhengold-bearingshearzonewesternHAINANISLAND
分类号： P597[天文地球—地球化学][天文地球—地质学]
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