Research on the Mineralogy of Plagioclase from the Magmatic Complex in the Middle Segment of Nanjing-Zhenjiang Mesozoic Magmatic Belt
Based on comprehensive research on geology, geophysics, geochemistry and remote sensing, combined with the application of optical microscopic observation, X-ray diffraction, microprobe analysis, the genetic mineralogical features of plagioclase phenocryst for probation of the differentiation evolution characteristics of intrusive bodies in Anjishan, Funiushan, Xiyinkeng, Hongshuidang, Tongshan and Xiashu are studied. The results suggest that the plagioclases are dominated by oligoclase and labradorite with oscillatory zoning. The growth process of plagioclases can be divided into five stages with two growth types, the mafic core one and intermediate core one.