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Minerals, Volume 10, Issue 12

December 2020 - 103 articles

Cover Story: This paper sheds light on the production of Egyptian blue, an artificial material widely used as a pigment in the ancient Mediterranean world, based on the examination of pellets from the late Hellenistic workshop of the island of Kos (Greece). Eighteen samples were obtained from pellets of various textures and tones of blue and examined via optical microscopy, scanning electron microscopy coupled with energy-dispersive X-ray spectroscopy, and micro-Raman spectroscopy, providing insight into the composition of the material on the level of the single grain. The results shed light on the firing procedure and possible sources for raw materials. Two process to produce light blue pigments was identified, illustrating the highly specialized knowledge of the ancient craftspeople. View this paper
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Articles (103)

  • Article
  • Open Access
27 Citations
6,454 Views
17 Pages

Optimization of the Mix Formulation of Geopolymer Using Nickel-Laterite Mine Waste and Coal Fly Ash

  • Alberto Longos,
  • April Anne Tigue,
  • Ithan Jessemar Dollente,
  • Roy Alvin Malenab,
  • Ivyleen Bernardo-Arugay,
  • Hirofumi Hinode,
  • Winarto Kurniawan and
  • Michael Angelo Promentilla

21 December 2020

Geopolymer cement has been popularly studied nowadays compared to ordinary Portland cement because it demonstrated superior environmental advantages due to its lower carbon emissions and waste material utilization. This paper focuses on the formulati...

  • Article
  • Open Access
9 Citations
3,663 Views
14 Pages

Reducing the Negative Technogenic Impact of the Mining Enterprise on the Environment through Management of the Water Balance

  • Elena Menshikova,
  • Viacheslav Fetisov,
  • Tatyana Karavaeva,
  • Sergey Blinov,
  • Pavel Belkin and
  • Sergey Vaganov

21 December 2020

In terms of anthropogenic impact of mining and processing enterprises, the adjacent territories are contaminated by upstream tailings dams. The contamination is developed by active seepage of liquid waste through the body of the dams. The authors hav...

  • Article
  • Open Access
3 Citations
3,443 Views
15 Pages

Lanthanum Role in the Graphite Formation in Gray Cast Irons

  • Eduard Stefan,
  • Iulian Riposan,
  • Mihai Chisamera and
  • Stelian Stan

21 December 2020

The present paper reviews original data obtained by the authors from recent separate publications with additional unpublished data, specifically concerning the Lanthanum (La)’s role in the solidification pattern and graphite formation in gray c...

  • Article
  • Open Access
20 Citations
3,546 Views
14 Pages

20 December 2020

The spin transition of iron can greatly affect the stability and various physical properties of iron-bearing carbonates at high pressure. Here, we reported laser Raman measurements on iron-bearing dolomite and siderite at high pressure and room tempe...

  • Article
  • Open Access
1 Citations
2,622 Views
16 Pages

20 December 2020

Mesozoic porphyritic rocks from the Zijinshan area, southwestern Fujian Province, China, are andesitic to rhyolitic in composition. The whole-rock SiO2 contents of these rocks are between 62.5% and 78.1%. Magmatic zircon from the Mesozoic porphyritic...

  • Article
  • Open Access
26 Citations
4,837 Views
17 Pages

19 December 2020

Pollution indices are used to assess the influence of the bedrock as a natural source of heavy-metal (HM), and anthropogenic pollution from ore mining in soils developed from ore-bearing carbonates. The research was conducted in two areas differing i...

  • Article
  • Open Access
57 Citations
5,292 Views
22 Pages

19 December 2020

Rare earth elements (REEs) and yttrium (Y), together known as REY, are extremely enriched in deep-sea pelagic sediments, attracting much attention as a promising new REY resource. To understand the influence of hydrothermal processes on the enrichmen...

  • Article
  • Open Access
7 Citations
3,197 Views
30 Pages

18 December 2020

The Hutouya polymetallic skarn deposit lies in the Qimantagh area of the East Kunlun Orogenic Belt, NW China. Skarnization and mineralization at the deposit are closely associated with contemporary felsic intrusions. In this paper, zircon U-Pb ages a...

  • Article
  • Open Access
2 Citations
2,496 Views
20 Pages

18 December 2020

This is the second part of a study of predictive models of oil sand ore and froth characteristics using infrared hyperspectral data as a potential new means for process control. In Alberta, Canada, bitumen in shallow oil sands deposits is accessed by...

  • Article
  • Open Access
3 Citations
2,898 Views
18 Pages

18 December 2020

This study is the first of two companion papers using hyperspectral data to generate predictive models of oil sand ore and froth characteristics as a potential new means for process control. In Alberta, Canada, shallow oil sands deposits are accessed...

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Minerals - ISSN 2075-163X