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Method for predicting weathering crust ion adsorption type rare earth deposit layer position through ancient phreatic water level

An ion-adsorption type, weathering shell technology, applied in the field of rare earth ore exploration, can solve the problems of leachate loss and unreasonable utilization, and achieve the effect of avoiding loopholes and efficient and reasonable utilization

Active Publication Date: 2020-09-18
GUANGZHOU INST OF GEOCHEMISTRY - CHINESE ACAD OF SCI
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Problems solved by technology

However, the buried depth of the ore body is generally 1-10m, so some ore bodies are often ignored, or are lost with the leachate due to surrounding mining, and have not been rationally utilized

Method used

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  • Method for predicting weathering crust ion adsorption type rare earth deposit layer position through ancient phreatic water level
  • Method for predicting weathering crust ion adsorption type rare earth deposit layer position through ancient phreatic water level
  • Method for predicting weathering crust ion adsorption type rare earth deposit layer position through ancient phreatic water level

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Embodiment 1

[0030] The samples come from the rock weathering crust of an ion-adsorption rare earth deposit in Meizhou City, Guangdong Province. In this example, the contents of Ce and rare earth elements in the samples at different depths of the weathering crust were calculated (Table 1), and the relative content of hematite-goethite ( Table 2), the paleo-phreatic level indicated by the sharp change of δCe, hematite-goethite is obtained, so that the rare earth elements are obviously enriched below the paleo-phreatic level.

[0031] Table 1

[0032] Depth (m) 0.1 0.7 1.7 3.5 4.5 6.4 8.8 10.5 12.7 δCe 2.6 3.7 2.5 4.3 1.0 0.7 0.9 0.6 0.2 REE 211 246 261 195 625 813 220 284 169 Depth (m) 15.0 18.8 20.6 21.6 25.3 27.4 30.0 33.5 35.1 δCe 0.5 0.2 0.9 0.6 0.5 1.1 0.9 0.7 0.8 REE 504 168 113 128 127 209 248 295 299 Depth (m) 39.4 41.4 43.4 45.0 48.0 49.5 58.6 69.0 78.3 δCe 0.8 0.9 0.9 0.9...

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Abstract

The invention discloses a method for predicting a weathering crust ion adsorption type rare earth deposit layer position through an ancient phreatic water level. A sample of the weathering crust is collected for trace element analysis and visible light-near infrared reflectance spectrum analysis; the change of Ce content in the weathering crust whole rock, namely deltaCe, and the absorption peak position of a visible light-near infrared reflection spectrum capable of representing the relative content of hematite-goethite in a wave band (P500) of 480-530 nm are calculated; the boundary line where deltaCe in the weathering crust is sharply changed from positive to negative and P500 is remarkably reduced is the ancient phreatic water level of the weathering crust, and the rare earth element rich ore layer in the weathering crust is distributed below the ancient phreatic water level. The precision of delineating the ore body and evaluating the ore deposit reserves of the rich ore layer ofthe weatheringion adsorption type rare earth ore deposit is further improved, and the purpose of efficiently utilizing rare earth resources in weathering crust ion adsorption type rare earth ore deposit prospecting exploration work is achieved.

Description

technical field [0001] The invention belongs to the technical field of rare earth ore exploration, and in particular relates to a method for predicting the stratum of a weathering crust ion-adsorption type rare earth deposit through paleowater levels. Background technique [0002] Rare earth elements are called "industrial vitamins" due to their wide application in many fields such as national defense, aerospace, special materials, metallurgy, energy and agriculture. In recent years, due to the rapid development of aerospace, new energy and new materials, rare earths have become a key strategic resource. Due to the increasing demand for rare earths in western developed countries, the price of rare earths (especially heavy rare earths) in the international market continues to rise. Driven by market demand and economic benefits, countries all over the world have attached great importance to the exploration, development and utilization of rare earth deposits in recent years. ...

Claims

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Application Information

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IPC IPC(8): G01N21/3563G01N21/359
CPCG01N21/3563G01N21/359
Inventor 谭伟黄健秦效荣何宏平梁晓亮马灵涯
Owner GUANGZHOU INST OF GEOCHEMISTRY - CHINESE ACAD OF SCI
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