A method for artificially synthesizing plagioclase fluid inclusions
A feldspar fluid, artificial synthesis technology, applied in the field of high temperature and high pressure experimental geochemical research, can solve the problems of unknown fluid properties and inapplicability
Active Publication Date: 2020-07-07
INST OF GEOCHEM CHINESE ACADEMY OF SCI
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Problems solved by technology
Therefore, in geological processes involving unsaturated silica systems, unknown fluid properties, and relatively high temperature and pressure conditions (such as high-pressure dehydration of basic oceanic crust in subduction zones, amphibolite facies metamorphism of intermediate-basic igneous rocks, etc. ), these methods are not applicable
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Embodiment 1
[0024] Example 1: In the high temperature and high pressure dehydration experiment of simulated basic metabasalt, the artificially synthesized fluid inclusion method of plagioclase for capturing dehydration fluid.
[0025] to combine figure 1 As shown, in the simulated high-temperature and high-pressure dehydration experiment of basic metabasalt, the plagioclase artificially synthesized fluid inclusion method that captures dehydration fluid, that is, the basic metabasalt is used as the initial material, and the initial material is in a specific temperature and pressure range. It will dehydrate and provide the necessary fluid phase for plagioclase synthetic fluid inclusions. Specific steps are as follows:
[0026] (1) Preparation of initial material: basic metabasalt was selected as the initial material, crushed and ground to a particle size of about ~200 mesh, and dried.
[0027] (2) Select plagioclase crystals: the initial material metabasalt belongs to the basic system, so...
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The invention discloses a method for artificial synthesis of a plagioclase fluid inclusion. The method comprises the steps of 1, plagioclase crystal selection; 2, directed plagioclase core column preparation plus thermal shock cracking plus cleaning plus drying; 3, plagioclase powder sieving plus drying; 4, red copper inner tube preparation; 5, red copper outer tube preparation; 6, assembling, wherein a prepared second red copper outer tube with the inner diameter of 6mm and a sample-contained first red copper outer tube with the inner diameter of 5mm are sealed in an inverted mode, and inversion-like capsule sealing is formed; 7, high-temperature high-pressure annealing and quenching; and 8, inclusion slice preparation, wherein the red copper outer tubes subject to a high-temperature high-pressure reaction are taken out, cutting is performed in the transverse direction of the red copper outer tubes after glue injection, and a slice with a cutting face, where a red copper inner tube and plagioclase are exposed, is made into an inclusion slice. Through the method, the problems that in the prior art, the method of synthesizing quartz and the like into a fluid inclusion is only suitable for a silicon dioxide saturated system, and the method of synthesizing calcite, halite and the like into a fluid inclusion is only suitable for respective specific application conditions 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 artificially synthesizing plagioclase fluid inclusions. Background technique [0002] Since the artificially synthesized fluid inclusions were proposed in the late 1970s, they have been widely used in many research fields of experimental geochemistry, such as the calibration of related instruments such as cold and hot tables, Raman spectrometers, geological fluids (minerals, oil and gas, environment, Geography, Earth’s interior material research, etc.) phase equilibrium and fluid reaction simulation, element occurrence state, solubility and migration, partition experimental research, etc. [0003] The artificially synthesized fluid inclusion technology utilizes the dynamic equilibrium process of dissolution-precipitation and crystallization of the main mineral under high temperature and high pressure, so ...
Claims
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IPC IPC(8): G01N1/28
CPCG01N1/28
Inventor 李和平杜俊刘洪微周丽
Owner INST OF GEOCHEM CHINESE ACADEMY OF SCI