A method for artificial synthesis of fluid inclusions in quartz

Abstract

The invention discloses a method for artificially synthesizing fluid inclusions in quartz. First, natural quartz crystals without inclusions are cut into cuboid quartz columns; ground for 10-15 minutes to produce some irregular grooves on the surface; Corrosion in alkaline solution; cleaning and drying to obtain an initial quartz column containing fluid inclusions; then put the initial quartz column into a precious metal tube welded at one end, put quartz sand and fluid into the precious metal tube and put the After freezing in nitrogen, seal the other end; put the precious metal tubes welded at both ends into a cold-sealed autoclave, keep the temperature and pressure at 600-800°C and 100MPa for 3-6 days; slowly cool to room temperature, take out The quartz column is cut along the C axis, polished on both sides and observed under a microscope. It can be found that there are many round fluid inclusions within a depth of 30 μm from the quartz surface. The inclusion size is 20‑40 μm, which is very suitable for LA‑ICP‑MS analysis.

Description

technical field [0001] The invention belongs to the field of geological fluid research in earth science, and in particular relates to an artificial synthesis method of fluid inclusions in quartz. Background technique [0002] The method of artificially synthesizing fluid inclusions in quartz, since Bonder and Sterner used Brazilian inclusion-free quartz to synthesize a pure water system in 1984 (H 2 O), water-salt system (NaCl-H 2 O, KCl-H 2 O, CaCl 2 -H 2 After O) inclusions, predecessors used this technology to study the dissolution behavior of trace elements in hydrothermal fluids, the distribution behavior of trace elements in magmatic hydrothermal processes, and the pressure-volume-temperature-composition of various fluid systems, namely P-V-T-X relationship has been well researched. And with the application of laser ablation inductively coupled plasma mass spectrometer (LA-ICP-MS) in the composition analysis of fluid inclusions in synthetic quartz, new technical r...

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Problems solved by technology

[0004] The technical problem to be solved by the present invention is to provide an artificial synthesis method of fluid inclusions in quartz, so as to solve the problem that the fractures of fluid inclusions in quartz synthesized in the prior art are generally easy to close perpendicular to the direction of the long axis of quartz so that the inclusions are located Deep in the quartz, after the inclusions are polished to the surface, the number of inclusions is small, small, and the shape is not round, which is not conducive to the ablation of the laser beam spot

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