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Your search keyword '"Chemical-mineralogical characterization"' showing total 2 results
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2 results on '"Chemical-mineralogical characterization"'

1. Investigation of Magnetic Separation and Thermal Treatment Effects, Combined with Additives (Mineral Oxides), on Serpentinized Peridotites from the Gerakini (Chalkidiki, N. Greece) Magnesite Mine †.

Author

Papargyriou, Dimitra, Tzamos, Evangelos, Kasinos, Andreas, Papageorgiou, Polykarpos, Mitrakas, Manassis, and Zouboulis, Anastasios

Subjects
MAGNETIC separation, HEAT, ADDITIVES, X-ray fluorescence, MINERALS
Abstract

Serpentinized peridotite samples—considered nowadays as deposited waste at the magnesite mine of Gerakini (Chalkidiki, N. Greece)—were collected, and their chemical and mineralogical characterization analyzed with Energy-Dispersive X-ray Fluorescence (ED-XRF) and X-ray Diffractometry (XRD). Dry magnetic separation was used as a convenient enrichment method; however, no significant effect was shown in the chemical composition of separated (magnetic and non-magnetic) fractions, except for small increases in the olivine, antigorite and enstatite contents, which were observed in the non-magnetic fraction. Finally, the calcination of ground peridotites at 1520 °C, with the addition of CaO, Al2O3 and SiO2, presented a negative effect on the structure of the products with regard to their main refractory properties. In contrast, the addition of Cr2O3 and ΜgO mineral oxides showed improved refractory properties when compared with the initial material. [ABSTRACT FROM AUTHOR]

Published
2023
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2. Ceramic productions and human interactions during the Early Bronze Age in northern Iberia.

Author

Vega Maeso, C., Gallello, G., Palmero, S., Ferrari, B., Sánchez Carro, M. Á., González Morales, M. R., Gutiérrez Zugasti, I., Ramacciotti, M., and Pastor, A.

Subjects
BRONZE Age, SOCIAL interaction, CERAMICS, MANUFACTURING processes, RAW materials, APPETIZERS
Abstract

The Early Bronze Age ceramic collection found into the caves of La Llana and El Toral III in Asturias (Spain) presents common decoration such as that found in the centre of Cantabrian Spain from the same period, which resembles others found in the Ebro Valley and Atlantic Europe. Therefore, the main objective of this study it is to identify the raw material origin and understand the pottery production process during the Early Bronze Age in the Cantabrian region. A methodological approach based on the chemical and mineralogical analysis of vessels and experimentally fired clay samples collected all over the centre of this region was developed. Furthermore, the post‐depositional processes affecting the sherds' composition was evaluated by employing the rare earth elements as markers. The results showed that the studied assemblage has important similarities with the raw materials of the surrounding area, which supports the hypothesis of a regional mobility. [ABSTRACT FROM AUTHOR]

Published
2021
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