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Abstract

Metacarbonates located in Sa Thay, Kon Tum massif are distributed in ultramafic marble assemblage from Kham Duc (NP-e1) complex.The main rock-formingminerals arecalcite and dolomite (40÷85%), olivine (5÷20%), pyroxene (5÷15%), and serpentine (5÷25%). Accessory minerals aretalc and epidote. Chemical composition of pyroxene in metacarbonate was determined by EPMA method: the composition of pyroxene is diopsite (Wo49.5 En50.1Fs0.4 to Wo50.8En48.9Fs0.2). The rim of pyroxene grains generally have higher wollastonite than core(49.9÷50.8%).Metacarbonates originated from metamorphic sources with three main stages: regional metamorphism, superimposed metamorphismand hydrothermal metamorphism stages. With each stage, they have different color characteristicsto create a variety of color. Metacarbonateshave quality characteristicsofcolor, durability, pattern, diversity, and low radioactivity. These make the metacarbonates suitable for gemstone applications.



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Issue: Vol 5 No 2 (2021): Vol 5, Issue 2 (2021): Under Publishing
Page No.: Online first
Published: Mar 14, 2021
Section: Original Research
DOI: https://doi.org/10.32508/stdjns.v5i2.962

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Copyright: The Authors. This is an open access article distributed under the terms of the Creative Commons Attribution License CC-BY 4.0., which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.

 How to Cite
Bui, N., Pham, H., Pham, M., & Le, P. (2021). Mineral characteristics of metacarbonat in Sa Thay, Kon Tum and potential use for gemstone. Science and Technology Development Journal - Natural Sciences, 5(2), Online first. https://doi.org/https://doi.org/10.32508/stdjns.v5i2.962

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