Application of Energy-Constrained Assimilation-Fractional Crystallization (EC-AFC) Model for Ultramafic Magmatic Systems: A Case Study of the Limahe Intrusion Associated with Cu-Ni Sulfide Ores , State w:st="on">Sichuan
详细信息
- 责任者：Li Yongsheng (State Key Laboratory of Geological Processes and Mineral Resources ; China University of Geosciences ; Beijing 100083 ; China) ; Zhang Zhaochong
- 刊名：Acta Petrologica Sinica
- 出版年：2011
- 卷期：27(10)
- 关键词：超镁铁质岩 ; ultramafics ; 地质模型 ; geological models ; 四川 ; Sichuan Province
- 页码：p.2975-2983
- 图表：4 illus., 3 tables, 48 refs.
- 分类号：0801
- 出版序号：193
- issnNo：ISSN1000-0569
- isbnNo：CN11-1922/P
摘要
Magma evolution is an open-system process in many cases with some exceptions. AFC (assimilation-fractional crystallization) model is a ’classical’ approach for modeling magma evolution. In this paper, we introduce the principles of EC-AFC model, and evaluate the published datasets of the Limahe intrusion associated with Cu-Ni sulfide ores, and our calculation suggests that EC-AFC model is more consistent with the observed geochemical trends. Furthermore, the isotopic Sr trends of EC-AFC results indicate that the primary magma generated Limahe intrusion are probably contaminated by lower or middle crust, and either parental magmas or wall rocks are compositionally heterogeneous.