Evaluation of numidian quartz sandstones from Southern Italy for industrial applications

Title:

Evaluation of numidian quartz sandstones from Southern Italy for industrial applications

Creator:

Fornelli, Annamaria and Micheletti, Francesca

Identifier:

https://cdk.lib.cas.cz/client/handle/uuid:1015bf64-d122-4e2b-8e40-5cad5c55cb42
uuid:1015bf64-d122-4e2b-8e40-5cad5c55cb42
issn:1214-9705
doi:10.13168/AGG.2021.0034

Subject:

geologie, geology, Numidian quartzarenites, raw material for industry, stone resources in Campania and Lucania regions, Southern Italy, 7, and 551

Type:

model:article and TEXT

Format:

print, bez média, and svazek

Description:

a1_Numidian quartz-rich sandstones collected from four different reconstructed sections along the Apennine chain of Southern Italy, have been studied for their textural, petrographic and geochemical characteristics to verify their potential industrial use. Sampling was carried out along a NW-SE transect: Monteverde and Aquilonia sections at NW (Campania Region) and Valsinni and Rotondella ones at SE (Lucania Region). The sandstones from NW successions are subarkoses with subordinate sublitharenites. High compositional maturity is shown by these sandstones containing high SiO2 values (93wt% in average) and lowest amounts of CaO (0.08 wt%), MgO (0.1wt%), Fe2O3 (0.9 wt%) due to the absence of carbonate components (cement and lithics) and scarce presence of clay-ferruginous cement. The sandstones from SE successions show lower contents of SiO2 (87 wt% in average) and relatively higher contents of CaO (up to 7.4 wt%), MgO (up to 1.9 wt%) and Fe2O3 (up to 4.6 wt%) as compared to the previous ones, connected to the presence of calcite and clay-ferruginous cements; these can be classified as Fe-sands with subordinate sublitharenites. The sandstones from NW area show a better potential vocation to be used in the glass industry. However, the coloring elements contents are too high for clear or optical glass production. They are it is suitable as raw material for colored glass, insulating fibres, foundry molds or air Crete. With the aim of assessing the possible improvement of chemical characters, four granulometric fractions (A< 63 μm, B 63-125 μm, C 125-250 μm and D >250μm) were analyzed considering four samples from NW successions., a2_Based on chemical composition, C and D fractions from Aquilonia area, are the most suitable for a coloured glass, while fractions A (<63 μm) and B (63-125 μm) mixed in proportions of 40 % (A) and 60 % (B), appropriately cleaned of clays, heavy minerals and iron hydroxides, could be used as raw material for the paint industry. The obtained results suggest a complete exploitation of this type of sandstones in the manufacturing industry, reducing waste materials and enhancing the economic value of these resources from southern regions of Italy., Annamaria Fornelli and Francesca Micheletti., and Obsahuje bibliografii

Language:

English

Rights:

http://creativecommons.org/licenses/by-nc-sa/4.0/
policy:public

Coverage:

473-485

Source:

Acta geodynamica et geomaterialia : | 2021 Volume:18 | Number:4 (204)

Harvested from:

CDK

Metadata only:

false