Geochemical Characteristics and Genesis of Wulong Mafic Microgranular Enclaves in the Southern Qinling Mountains
详细信息
- 责任者：Zang Wenjuan (State Key Laboratory of Continental Dynamics ; Department of Geology ; Northwest University ; Xi’an 710069 ; China) ; Lai Shaocong
- 刊名：Journal of Northwest University
- 出版年：2011
- 卷期：41(2)
- 关键词：深成岩体 ; plutons ; 秦岭 ; Qinling Mountains
- 页码：p.278-284
- 图表：7 illus., 1 table, 26 refs.
- 分类号：0801
- issnNo：ISSN1000-274X
- isbnNo：CN61-1072/N
摘要
In this paper, the authors determined the genesis and source features of mafic microgranular enclaves in Wulong granite intrusion in the southern Qinling Mountains. An integrated field and laboratory study on the colours, shapes, textures, structures, compositions, mineralogy and petrology of the enclaves indicates that they have coexisted with the host granitic magmas and experienced rapid crystallization. The enclaves are dioritic, and enriched in alkali contents, in the SiO2-K2O diagram, all the samples plotted in the shoshonite area, and the Na2O/K2O>1; compared with the host granite, the enclaves have higher magnesium, iron, calcium, and titanium.