Geochemical Characteristics and Genesis of Wulong Mafic Microgranular Enclaves in the Southern Qinling Mountains
详细信息   
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.
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