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Fused Filament Fabrication FFF of Metal-Ceramic Components
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Attrition in the kimberlite system.

Thomas J Jones1,2, James K Russell3

  • 11Department of Earth Sciences, Durham University, South Road, Durham, DH1 3LE UK.

Mineralogy and Petrology
|March 19, 2019
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Summary
This summary is machine-generated.

Particle attrition experiments on olivine reveal how grain size reduction occurs in kimberlite systems. Higher energy environments, like fluidized beds, produce more fines faster than low-energy tumbling mills.

Keywords:
AbrasionCrystal breakageKimberlite ascentMillingOlivine fines production modelOlivine wear

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Area of Science:

  • Geology
  • Mineralogy
  • Experimental Petrology

Background:

  • Particle attrition, involving grain size reduction and shape modification, is a significant process in particle transport.
  • Previous studies on particle attrition primarily focused on sediments from aeolian or fluvial environments.
  • Olivine is the most abundant mineral in kimberlite, making it a key focus for understanding kimberlite system processes.

Purpose of the Study:

  • To investigate particle attrition processes specifically within the kimberlite system using olivine.
  • To simulate and compare attrition under two distinct energy regimes relevant to kimberlite formation and transport.
  • To quantify the rates and extents of olivine attrition as a function of time and energy input.

Main Methods:

  • Analogue experiments using olivine particles in two different setups: a low-energy tumbling mill and a high-energy fluidized particle bed.
  • Analysis of experimental run-products to measure grain size reduction and shape modification.
  • Modeling of experimental data using an empirical rate equation to describe fines production over time.

Main Results:

  • Both experimental systems showed particle attrition, leading to fines production.
  • The fluidized particle bed system demonstrated significantly higher efficiency in fines production compared to the tumbling mill.
  • Both systems exhibited a plateau in fines production at extended particle residence times, with the fluidized system reaching it more rapidly.

Conclusions:

  • Experimental results and models offer a method for forensic examination of kimberlite processes based on olivine size and shape.
  • The study highlights the differential impact of energy levels on particle attrition rates and outcomes in geological systems.
  • Understanding olivine attrition provides insights into sediment transport, dispersal, ascent, and eruption dynamics within the kimberlite system.