Rare earth element chemistry indicates zircon genesis during the evolution of weathering profile

摘要：

　　Although rare earth element(REE)in magmatic zircons has been widely used to identify the type and compositional evolution of host rocks,its abundance and fractionation during the crystallization of magmatic zircons remain more clarification.We investigated the REE characteristics in zircons during different degrees of chemical weathering based on the systematic observations from a granodiorite-weathering profile in southeast China.Despite a relatively stable provenance of studied profile(zircon U-Pb ages are 95.2±4.8 Ma),the zircon REEs exhibit a decrease in REE abundance with systematic differences in REE fractionation patterns from the bedrock to upper layers,e.g.ΣREE,(Lu/Gd)CN and Ce/Ce*.These evidences suggest micro-environment changes in the crystallization of magmatic zircons and are expected to have an influence on the indication of host rock type and magmatic differentiation to some extent.

关键词： Weathering profile rare earth elements zircon

作者: Ni Su Shouye Yang Wei Yue

作者单位: State Key Laboratory of Marine Geology,Tongji University,Shanghai 200092,P.R.China State Key Laboratory of Marine Geology,Tongji University,Shanghai 200092,P.R.China;Laboratory for Ma

会议类型: 国际会议

会议名称: The 11th International Symposium on Geochemistry of the Earths Surface(GES-11)(第十一届地球表层地球化学国际研讨会)

会议地点: 贵阳

会议语种:英文

页码: 1-3

在线出版日期: 2017-06-11（万方平台首次上网日期，不代表论文的发表时间）