Periodico di Mineralogia https://rosa.uniroma1.it/rosa04/periodico_di_mineralogia <p><strong>Periodico di Mineralogia</strong> is an international peer-reviewed Open Access journal publishing Research Articles, Letters and Reviews in Mineralogy, Crystallography, Geochemistry, Ore Deposits, Petrology, Volcanology and applied topics on Environment, Archaeometry and Cultural Heritage. The journal aims at encouraging scientists to publish their experimental and theoretical results in as much detail as possible. Accordingly, there is no restriction on article length. Additional data may be hosted on the web sites as Supplementary Information.</p> <p>The journal does not have article submission and processing charges. Colour is free of charges both on line and printed and no Open Access fees are requested.</p> <p>The Journal is abstracted/indexed in: Clarivate Journal Citation Reports (Impact Factor 2024= 1.2); Scopus (CiteScore: 2024= 1.8); Science citation index expanded; Web of Science Core Collection; Georef database; RRUFF.</p> Sapienza Università Editrice en-US Periodico di Mineralogia 0369-8963 Comprehensive geostatistical Assessment of stream sediments for mineralization potential in the eastern Black Sea region (Gümüşhane, Trabzon, Giresun, and Bayburt), Türkiye https://rosa.uniroma1.it/rosa04/periodico_di_mineralogia/article/view/18709 <p class="p2">This study presents a geochemical and geostatistical analysis of the Eastern Black Sea region of Türkiye, a critical part of the Tethyan metallogenic belt, which spans Gümüşhane, Trabzon, Giresun, and parts of Bayburt. The study aimed to assess the mineralization potential of the region for both base and precious metals, using 2,405 stream sediment samples collected across an area exceeding 2000 km². Geochemical analysis revealed significant concentrations of Cu, Pb, Zn, As, and Au, with gold levels reaching up to 3,000 ppb, highlighting substantial hydrothermal alteration. Various geostatistical methods, including traditional statistics, factor analysis, and multifractal approaches (Concentration- Number [C-N] and Concentration-Area [C-A]), were applied to define threshold values and identify anomalous zones. Factor analysis identified two principal associations: base metals (Cu, Pb, Zn) and precious metals (Au, As), with cross-loading of Pb indicating shared mineralization processes. Kriging interpolation and multi-anomaly mapping were employed to delineate areas of interest for both gold and base metal exploration. Results revealed high Au concentrations in Demirözü (Alucra-Giresun), Demirkapı (Torul- Gümüşhane), and other areas, while Cu, Pb, and Zn enrichments were observed in regions such as Güllüce-Emeksen (Yağlıdere-Giresun) and Tohumluk-Tepeköy-Arduç. The study demonstrated that combining factor analysis with advanced geostatistical methods, such as the M+2MAD and C-N methods, provides an effective framework for identifying prospective areas for mineral exploration. These results highlight the potential of the Eastern Black Sea region for future exploration and demonstrate the value of statistical-geochemical techniques in optimizing exploration strategies.</p> Mustafa Özkan Alaaddin Vural Ömer Akgül Mehmet Ali Gültepe Celaleddin Bayraktar Rasim Taylan Kara Copyright (c) 2025 Periodico di Mineralogia https://creativecommons.org/licenses/by/4.0 2025-05-20 2025-05-20 94 2 10.13133/2239-1002/18709 Development of green coatings with mineral modifiers and natural fillers https://rosa.uniroma1.it/rosa04/periodico_di_mineralogia/article/view/18898 <p class="p2">This study presented the improvement of the qualities of organic coatings compounds in construction industry. Different amount ratios, 0-2% (w/w), of red rose petals, hazelnut shells, zinc borate, and thyme oil were added into the water-based interior organic coating. The Box-Behnken optimization technique was utilized to examine the optimum additive-containing composition of organic coatings for better qualities, using coating thickness as response for all experimental sets. R<span class="s2">2 </span>value of the equation as 0.9555 between 0 and 1 proved that the experimental data provided a perfect linear curve. The improvement of optimum coating rheological properties was investigated by physical tests; water absorption, impact resistance, covering ability, adhesion, and corrosion. According to Scanning electron microscopy (SEM), a homogeneous and well-dispersed organic coating mixture was obtained. Moreover, it was observed that thermal degradation value for both reference and optimum organic coating compound was protected as 403.15°C by Thermal Gravimetric/Differential Thermal Analysis (TG-DTA) results.</p> Zehra Meryem Bay Fatma İrem Şahin Nil Acaralı Copyright (c) 2025 Periodico di Mineralogia https://creativecommons.org/licenses/by/4.0 2025-07-07 2025-07-07 94 2 10.13133/2239-1002/18898 Peralkaline phonolites: formation, crustal evolution, and eruption, a review https://rosa.uniroma1.it/rosa04/periodico_di_mineralogia/article/view/18928 <p class="p2">Peralkaline phonolites are the most evolved products of the evolution of Si-undersaturated magmatic suites; thus, they can be important components of extrusive sequences globally, occurring in all major tectonic settings. Here we review aspects of their petrogenesis and evolution, including their ultimate mantle sources and polybaric liquid-lines-of-descent. There are three main compositional lineages: (1) mafic nephelinite-phonolite, (2) basanite-phonolite, and (3) alkali basalt-phonolite. In the majority of cases, the dominant differentiation mechanism has been fractional crystallization. Attention is drawn to the extreme compositions generated by protracted fractionation, with peralkalinity indices ≤18. Several natural systems are used to describe the range of high-level magma reservoirs and the internal differentiation processes. Volcanic hazards and the potential environmental impact of eruptions are assessed and the economic potential of phonolites introduced.</p> Harvey Belkin Ray Macdonald Copyright (c) 2025 Periodico di Mineralogia https://creativecommons.org/licenses/by/4.0 2025-07-07 2025-07-07 94 2 10.13133/2239-1002/18928