Identification method of andesine in fine settlement (sedimentary rock)

Abstract

The invention relates an identification method of andesine in a fine settlement (sedimentary rock), comprising the following steps: putting a rock slice under an orthogonal polarizing microscope; putting the object under test in an extinction position; rotating the objective table 45 DEG to allow the long axis of the object under test to be angled 15 DEG from the cross wire of the second quadrantand the fourth quadrant in the eyepiece of the microscope; inserting a gypsum test panel; allowing the long axis, which is a small refractive index, of the object under test to be overlapped with a small refractive index X of the gypsum test panel, acquiring andesine which has an interference color of blue, and detecting the content of andesine that has an interference color of blue with area visual assessment percentage method; then rotating the objective table 90 DEG to allow the long axis of the object under test to be angled 15 DEG from the cross wire of the first quadrant and the third quadrant in the eyepiece of the microscope; allowing the long axis, which is a small refractive index, of the object under test to be overlapped with a large refractive index Z of the gypsum test panel, acquiring andesine which has an interference color of yellow, and detecting the content of andesine that has an interference color of yellow with area visual assessment percentage method. According to the invention, the andesine in the fine-particle settlement (sedimentary rock) can be identified rapidly and accurately.

Description

Technical field: [0001] The invention relates to a method for rapidly and accurately identifying the meso-feldspar and its content in fine deposits (rocks) (particle diameter less than 0.03mm) under a microscope. Background technique: [0002] Under the microscope, it is not easy to distinguish and identify meso-feldspar and clay minerals with fine particle size (particle size less than 0.03mm). Numerous fine feldspars and clay minerals are aggregated under the microscope and distributed in a directional manner. Each fine mineral is in the shape of a needle point. It is impossible to distinguish the shape and interference color of a single mineral, and it is easy to confuse. Identify fine meso-feldspar as fine clay mineral, or identify fine meso-feldspar as fine meso-feldspar. Clay minerals are an important component of argillaceous rocks, and meso-feldspar is an important component of andesitic volcanic tuff. Whether the rock is dominated by meso-feldspar is the main basi...

AI Technical Summary

Problems solved by technology

The disadvantage of this method is that the speed is slow, the cost is high, and the cycle is long

Moreover, it is impossible to analyze the total amount of plagioclase in sedimentary rocks at any time for every sample. At present, the total amount of plagioclase can only be determined, and it specifically belongs to albite, feldspar, meso-feldspar, and arganite in plagioclase. Feldspar, double feldspar and anorthite cannot be distinguished

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