Method for synthesizing water-containing plagioclase solid solution at high temperature and high pressure

Abstract

The invention discloses a method for synthesizing a water-containing plagioclase solid solution at high temperature and high pressure, which comprises the following steps: respectively weighing initial raw materials corresponding to albite and anorthite in chemical stoichiometric ratio according to the molar ratio of albite to anorthite in the plagioclase solid solution of 4: 1, grinding in alcohol by using an agate mortar, uniformly mixing, and drying in a drying oven; synthesizing the plagioclase glass at high temperature; crushing the plagioclase glass in the platinum crucible filled with the plagioclase glass on a tablet press, putting the plagioclase glass into a high-frequency vibration ball mill, grinding the plagioclase glass into powder with uniform particles, and then putting the powder into a drying oven for drying; preparing a primary-secondary red copper tube; assembling a water-containing sample; synthesizing and assembling at high temperature and high pressure; placing the assembled block on a cubic press, and synthesizing a water-containing sample under the conditions of high temperature and high pressure to obtain a finished product; the technical problems of limited sample size, inaccurate sample water content control, high experimental cost and the like in the synthesis of the water-containing plagioclase solid solution in the prior art are solved.

Description

technical field [0001] The invention belongs to the field of high-temperature and high-pressure experimental geochemical research, and in particular relates to a method for synthesizing hydrous plagioclase solid solution under high temperature and high pressure. Background technique [0002] Plagioclase is the main nominal anhydrous mineral in the crust, usually containing a small amount of OH and H 2 Structural water exists in the form of O, and its content ranges from tens to thousands of ppm. The existence of water not only affects the physical and chemical properties of plagioclase, such as mechanical, elastic properties, electrical conductivity, thermal conductivity, diffusion of elements, order / disorder of Al / Si, etc., the plagioclase containing water has a great influence on the research The cycle of water in the middle and lower crust, the formation and evolution of the crust, the stability and rheological consequences of the lithosphere are of great significance. ...

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Problems solved by technology

[0005] The technical problem to be solved in the present invention is to provide a method for synthesizing hydrous plagioclase solid solution under high temperature and high pressure, so as to solve the problem that the prior art synthesizes hydrous plagioclase solid solution due to the limitation of the sample size of the synthesis technique and the inaccurate control of the water content of the sample. Technical issues such as high cost

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