Discrimination method of redox property of ore-forming fluid based on cathodoluminescence characteristics of scheelite in porphyry deposit

Abstract

The invention provides a method based on the cathode luminescence feature of scheelite in a porphyry deposit and used for distinguishing the redox properties of an ore-forming fluid. The method includes: acquiring a plurality of scheelite samples; selecting scheelite particles on the basis of the mineralogy, morphology and production features of the scheelite particles in the scheelite samples toobtain high-quality scheelite particles; acquiring the scanning electron microscope-cathode luminescence image and back scattering image of the high-quality scheelite particles; based on the scanningelectron microscope-cathode luminescence image and the back scattering image, dividing the high-quality scheelite particles according to the morphology and internal structural features of the scheelite particles to obtain a plurality types of high-quality scheelite particles; performing in-situ analysis on rare-earth elements in the plurality types of high-quality scheelite particles to obtain europium content and molybdenum content data; calculating europium anomaly according to the europium content data, and building an element distribution diagram according to the europium anomaly and the molybdenum content data, wherein the element distribution diagram is used for indicating the redox properties of the ore-forming fluid of the scheelite.

Description

technical field [0001] The invention relates to the field of research on characteristics of scheelite ore-forming fluids in porphyry-type deposits, in particular to a method for distinguishing redox properties of ore-forming fluids based on cathodoluminescence characteristics of scheelite in porphyry-type deposits. Background technique [0002] Porphyry tungsten deposits have the characteristics of large reserves, shallow burial, low grade, easy mining and high comprehensive utilization rate. Although the porphyry-type tungsten deposit is far inferior to the quartz vein-type tungsten deposit in terms of reserves and production of tungsten ore, with the deepening of geological work, old mines continue to explore and increase reserves, such as the Lianhuashan porphyry-type tungsten deposit in Guangdong , and the newly discovered Nuri skarn-porphyry-type large-scale tungsten-copper deposit in Tibet and the Muguayuan deposit in Hunan have made the porphyry-type tungsten deposit ...

AI Technical Summary

Problems solved by technology

Although at the end of the 20th century, people have discovered that scheelite is also a mineral with cathodoluminescence, but no one has carried out cathodoluminescence related research on scheelite in porphyry deposits.

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