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地质论评  2011 

一种获取流体包裹体气液比的便捷方法

Keywords: 流体包裹体,气液比,便捷方法

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Abstract:

本文建立了一套基于利用高分辨率偏光显微镜和荧光显微镜获取流体包裹体气液比的方法。通过高分辨率显微镜自身刻度,获取不同深度平面包裹体的图像,应用绘图软件勾画包裹体和气泡边界,获取不同深度切片上包裹体和气泡的面积,①把不同切片看做短柱体,用面积与切片步长相乘,累加获得包裹体和气泡的体积,计算包裹体的气液比;②拟合面积与深度的函数,积分计算包裹体和气泡的体积,从而求取包裹体气液比。此方法不仅能够计算发荧光的烃类包裹体气液比,还能够计算含烃盐水包裹体、盐水包裹体和H2O―CH4包裹体等不发荧光的包裹体气液比,同时,也能够进行包裹体气液比的原位分析。此方法成本低,所需设备相对简单,利于普及应用,有助于流体包裹体热力学模拟的发展。

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