Ore prospecting method for Carlin type gold deposit

A gold deposit, Carlin-type technology, applied in the direction of measuring devices, instruments, and material analysis through electromagnetic means, can solve the problems of not using calcite prospecting methods, ignoring the systematic research and comparison of different types of calcite, etc., and achieve high promotion Application value, solving ecological and environmental problems, and improving the efficiency of ore prospecting

Inactive Publication Date: 2020-05-22
YUNNAN UNIV
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  • Description
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Problems solved by technology

Different types of calcite may have differences in their occurrence, color, cathodoluminescence, rare earth element distribution, and carbon-oxygen isotope composition. Past work has mainly focused on calcite that coexists with ore minerals, ignoring the systematic analysis of different types of calcite. Research and comparison, there is no prospecting method for Carlin-type gold deposits using calcite as a key prospecting marker mineral

Method used

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  • Ore prospecting method for Carlin type gold deposit
  • Ore prospecting method for Carlin type gold deposit
  • Ore prospecting method for Carlin type gold deposit

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] The macroscopic color characteristics of calcite veins developed on the surface of a Carlin-type gold mining area that occurred in fine clastic rocks in southwestern Guizhou were classified. ) to collect systematically according to the distribution, mark the coordinates of the sampling points and take pictures, see the attached Figure 2-3 ;

[0034] The obtained pale white turbid calcite was observed for cathodoluminescence, and calcite (RGB is 165, 42, 42) with cathodoluminescence with a brown-red ring was found, and detailed mineralogical observation was carried out;

[0035] Rare earth geochemical indicators: After field and indoor screening of calcite, conduct rare earth element geochemical analysis by solution method or LA-ICPMS in situ method, obtain rare earth element composition data, and perform standardized distribution diagram of rare earth element chondrites to determine medium rare earth elements Element index parameters (δEu=1~4);

[0036] Carbon-oxygen...

Embodiment 2

[0039] The macroscopic color characteristics of calcite veins developed on the surface of a Carlin-type gold mining area that occurred in diabase in southeastern Yunnan were classified. ) Systematically collect according to the distribution, mark the coordinates of sampling points and take pictures;

[0040]The obtained pale white turbid calcite was observed for cathodoluminescence, and calcite (RGB is 165, 42, 42) with cathodoluminescence with a brown-red ring was found, and detailed mineralogical observation was carried out;

[0041] Rare earth geochemical indicators: After field and indoor screening of calcite, conduct rare earth element geochemical analysis by solution method or LA-ICPMS in situ method, obtain rare earth element composition data, and perform standardized distribution diagram of rare earth element chondrites to determine medium rare earth elements Element index parameters (δEu=1.1~3.8);

[0042] Carbon-oxygen isotope geochemical index: Carry out carbon-oxy...

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Abstract

The invention discloses an ore prospecting method for a Carlin type gold deposit. The ore prospecting method comprises the steps of: field screening, indoor screening, rare earth geochemical index andcarbon-oxygen isotope geochemical index recognition, ore prospecting geochemical index system establishment, abnormal graph drawing to guide ore prospecting and the like. The method can be used for rapidly guiding Carlin-type gold deposit prospecting prediction, improves the prospecting efficiency, also can be used for judging the ore-forming fluid migration path of Carlin-type gold deposit and indicating a prospecting direction, has very high popularization and application value, solves the problems of long period, high investment and high risk of existing exploration technology, realizes the economical efficiency and high efficiency of Carlin-type gold deposit potential evaluation and ore right decision, is also one of important ways for realizing green exploration, and solves the ecological environment problem possibly caused in the traditional exploration technology implementation process.

Description

technical field [0001] The invention belongs to the technical field of mineral resources prospecting, and in particular relates to a method for prospecting a Carlin-type gold deposit. Background technique [0002] Carlin-type gold deposits are the most important type of gold deposits in the world, and their gold resource reserves account for about 10% of the total metal reserves. Because gold in this type of gold deposit exists in the form of invisible gold, the traditional prospecting and exploration technology is not effective for this type of gold deposit, which seriously restricts the major breakthroughs in the prospecting of Carlin-type gold deposits and also restricts the exploration of gold deposits. Potential evaluation and mineral rights decision-making of Carlin-type gold deposits. Calcite is a main gangue mineral in Carlin-type gold deposits. It is formed throughout the entire ore-forming process of Carlin-type gold deposits and records the ore-forming informatio...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N21/25G01N27/62G01N27/626
CPCG01N21/25G01N27/62
Inventor 周家喜
Owner YUNNAN UNIV
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