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Characterization of Microtexture Properties of Feldspar in Granites Based on Fractal P-A Model

机译:基于分形P-A模型的花岗岩长石微观组织特性表征

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P-A (perimeter-area) model is used to quantify the irregularities and also to characterize the property of microtexture of feldspar grains of granite samples from Gejiu Sn deposits located in the Southeastern Yunnan, P. R. China, one of the largest magmalic hydrothermal Sn deposits in the world. The P-A (perimeter-area) fractal modeling is here demonstrated to be an effective means to quantify the irregularities of feldspar in the geometries. Five types of granites at different place within granite mass and its contact zone in Songshujiao Ore Field were selected. The areas and perimeters of these feldspar grains were calculated by CIS-based technologies. There is an increase in the degree of deformation of granite from type I to type 5, a DAP (the perimeter-area fractal dimension) increase from 1.01,1.08,1.09,1.11 to 1.19, respectively. The results indicate quantitatively that from the igneous rock body to its inner contact zone the shape of feldspar grains tends to be more irregular, grain size tends to be smaller, and the number of grains increase as increase of the intensity of deformation.
机译:PA(外围区域)模型用于量化不规则性,还表征了位于中国云南东南部的个旧锡矿床花岗岩样品中长石晶粒的微观组织特性,该矿床是中国最大的岩浆热液锡矿床之一。世界。 P-A(周边区域)分形建模在此证明是量化几何形状中长石不规则性的有效手段。选择松树礁矿田花岗岩体及其接触带不同位置的五种花岗岩。这些长石晶粒的面积和周长是通过基于CIS的技术计算得出的。花岗岩的变形程度从I型增加到5型,DAP(周长-分形维数)分别从1.01、1.08、1.09、1.11增加到1.19。结果定量地表明,从火成岩体到其内部接触区,长石晶粒的形状趋于更不规则,晶粒尺寸趋于变小,并且晶粒数目随着变形强度的增加而增加。

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