ISSN 1006-3021 CN11-3474/P
Published bimonthly started in 1979
| 大别山东部榴辉岩同位素体系和变质作用的关系 |
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| 关键词:eastern Dabie mountains eclogites the relationship between isotopic systems and metamorphism |
| 基金项目:国土资源部同位素地质研究开放实验室基金 |
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| 摘要: |
| The Relationship between Isotopic Systems and Metamorphism of the Eclogites from the Eastern Dabie Mountains |
| Three main problems are revealed from the geochronological data of eclogites in the eastern Dabie Mountains.(1)It is difficult to evaluate the geological significance of Sm-Nd internal isochrons because of their two-point nature.(2)Some data of gneiss are interpreted as high-to ultrahigh-pressure metamorphic ages;(3)The first batch of Sm-Nd ages of “C type eclogites”was actually dated on garnet pyroxenites.Which three misleaded the geochronological studies of eclogites in the area.;The ages on eclogites reflect the Caledonian high-to ultrahigh metamorphic event of the eastern Dabie monuntains.The further geochronological study should focus on origins of zircons and the behavious of Sm-Nd system of eclogites.Petrographical observation provides and important method in studying the origions of zircons from eclogites. |
| JIAN Ping.1999.The Relationship between Isotopic Systems and Metamorphism of the Eclogites from the Eastern Dabie Mountains[J].Acta Geoscientica Sinica,20(4):341-348. |
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