A method for generating uniform size-segregated pyrite particle fractions

Area of Science:

• Geochemistry
• Mineralogy
• Experimental Petrology

Background:

• Standardized sample preparation is crucial for comparing pyrite dissolution experiments across different conditions.
• Assessing dry and wet sieving methods is necessary to develop reproducible techniques for size-specific mineral analysis.

Purpose of the Study:

• To evaluate dry and wet sieving preparation methods for pyrite.
• To establish a reproducible technique for obtaining uniformly sized pyrite particles within a specific size range.

Main Methods:

• A wet sieving preparation method was developed and described.
• The method focuses on concentrating pyrite particles within the 44-75 micrometer diameter range.
• The technique inherently removes adhering particles, eliminating the need for post-processing cleanup.

Main Results:

• The wet sieving method successfully isolates pyrite particles in the 44-75 micrometer size range.
• Pyrite size distribution is significantly influenced by sample preparation methods.
• Apparent pyrite dissolution rates are affected by the chosen preparation technique.

Conclusions:

• The described wet sieving methodology is non-destructive to pyrite samples.
• This technique utilizes standard laboratory equipment and is readily accessible.
• The method has potential applicability to other minerals beyond pyrite.