| 岩背和塌山含锡花岗斑岩的同位素地球化学特征和物质来源 |
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| 关键词:tin-bearing porphyry isotope Yanbei Tashan |
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| ISOTOPIC GEOCHEMICAL CHARACTERISTICS AND MATERIAL SOURCES OF TIN-BARING GRANITE PORPHYRY IN YANBEI AND TASHAN |
| Whole-rock Rb-Sr isochron age of 114 Ma in Yanbei granite porphyry and single grained zirconU-Pb age of 138 Ma in Tashan granite porphyry indicate that these two tin-bearing porphm beth arethe products of Late Yenshan magmatic activity. These rocks have relatively low εNd, high￣87Sr/￣86Sr1,￣207Pb/￣204Pb and δ￣(18)O and old Nd model ages,Mean while,they are also clearly rich inSiO2,K2O,Rb,F and Sn and posses intensive Eu and weak Ce negative anomalies.All of these charac-teristica are similar to those of continental crust transformation series granite in South Chma,implyingthat their parent magma may be derived from the unexposed Proterozoic metasedimentary rocks. |
| SHEN Wei-zhou,LING Hong-fei.1994.ISOTOPIC GEOCHEMICAL CHARACTERISTICS AND MATERIAL SOURCES OF TIN-BARING GRANITE PORPHYRY IN YANBEI AND TASHAN[J].Acta Geoscientica Sinica,15(1,2):117-123. |
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