Il giorno 11 febbraio 2025, dalle 14 alle 18, presso l'Aula Vallauri dell'Istituto Galileo Ferraris, in C.so Massimo D'Azeglio, 42 a Torino, si celebra la Giornata Internazionale delle Donne e delle Ragazze nella Scienza, con una conferenza che intende sollecitare riflessioni sul ruolo delle donne nelle discipline STEM, l'accessibilità delle carriere e le numerose sfide ancora aperte per raggiungere la parità.

L'iniziativa, aperta a studenti, dottorand*, personale della ricerca, docente e tecnico amministrativo della Scuola di Scienze della Natura, si svolge in presenza e sarà composta da una parte di seminario e una parte dedicata al workshop empow_lab “Quale discriminazione? Come (r)esistere insieme”.

Il solo seminario sarà accessibile anche da remoto tramite la piattaforma webex

Maggiori informazioni nel programma allegato

Marine cold seeps and hydrothermal vents are seafloor environments that harbor unique ecosystems based on chemosynthesis. The basis of these ecosystems are microbial communities, which thrive on the chemical energy derived from reducing fluids that are emitted from deep and shallow marine sediments. These organisms also produce a wide array of authigenic minerals including carbonates and sulfides, which are excellent archives to reconstruct pathways and processes of microbial metabolisms that lead to their formation. Trace elements and stable isotopes are powerful tools to elucidate these processes and reconstruct environmental conditions, and novel archives and methodologies being constantly uncovered and refined. This talk gives and overview of different environments and minerals in which I highlight the potential of low-temperature geochemistry in present and past sedimentary and marine environments, and suggest ideas for the future applicaiton of these tools in the geosciences.

The Speaker

Daniel Smrzka is postdoctoral researcher at the MARUM Center for Marine and Environmental Sciences, University of Bremen since 2022. His research interests cover a broad variety of topics including geobiology, low-temperature chemistry, mineral authigenesis, and the geomicrobiology of extreme environments. He obtained his doctorate degree from the University of Vienna in 2018. He is particularly interested in different cold seep ecosystems such as oil seeps, brine seeps, and hydrothermally-influenced seepage systems, as well as reconstructing marine chemosynthesis-based habitats in the rock record using geochemical tools such as stable isotopes, trace elements, and lipid biomarkers.

Onsite: h. 16:00 Aula Ruffini DST

Online at this link.

Contacts: geoseminar.dst@unito.it

Mine water (MW) is part of the water cycle but is rarely treated as such in regulatory frameworks, although many active and abandoned mines have considerable water volumes. Mining activities are still some of the most crucial environmental pressures worldwide, despite this fact the MW quality is a very rare investigated issue, as mostly considered as heavy polluted. The distinguish of anthropogenic and geogenic factors and how they control the qualitative characteristics of MW is presented in this lecture. In Greece the post mining areas are in transition era, as all lignite exploitations are almost ceased, the great challenge for these regions is the rehabilitation of the excavated areas. Pit lakes are a common post-closure proposed solution at mine sites, the experience from Greece has been investigated and are presented in this lecture, concerning the water quality and the water balance of pit lake.

The Speaker

Dr. Eleni Vasileiou, is Research and Teaching Staff at the School of Mining and Metallurgical Engineering of National Technical University of Athens (NTUA) Her main research interests are Environmental Hydrogeology, Groundwater Contamination, Anthropogenic and Geogenic sources of water pollution, Vulnerability of aquifers (DRASTIC, GALDIT), Heavy Metal pollution, Mine water management, Environmental pressures and management, DPSIR and SWOT analysis, Hydro-geo-chemical Modeling, Water Resources Management, Risk Assessment of Water Resources, Rehabilitation of post mining areas, Hydro-geochemistry, Water rock-soil interaction, Microplastics in waters, Land Uses and Water quality, Climate changes and water resources. She has participated as a research team member in 42 National Research projects and European projects all involved with water resources and geo-environment, in 35 of them as Principal Researcher. She hasover 90 publications in peer reviewed Journals and Proceedings of Conferences and 6 book chapters. 

Onsite: h. 11:00 Aula Pognante DST

Contacts: geoseminar.dst@unito.it

Septarian barite concretions have historically attracted scientists and mineralogists due to their concentric structure and the presence of septarian cracks. The aim of this study is to present detailed results from barite concretions occurring in Upper Cretaceous-Paleocene marl layers within the Southern Tellian Atlas (Northern Algeria). It focuses on: (1) petrographic and mineralogical analyses of these barite concretions, (2) geochemical studies (major, trace, and rare earth elements) to decipher the source of barite and diagenetic conditions, and (3) discussing the first sulfur isotopic (d34S) data on these concretions. Petrographic and mineralogical analyses of the studied concretions suggest three discernible growth modes of barite crystals: (i) formation of small, turbid, lamellar crystals intertwining to create rosette-like structures within concretion cores; (ii) radial-fibrous crystals in concretion cortexes; and (iii) infilling of septarian cracks. REE geochemistry and the d34S values of the studied barite concretions (ranging from 16‰ to 24.4‰)supports a seawater origin of diagenetic fluids. We propose that the investigated concretions grew in organic-rich, fine-grained sediments at shallow depths below the sea floor, during sedimentation halts. Barium was supplied to porewaters as a result of microbial degradation of organic matter within the methanogenic zone, and precipitated as barite upon migrating upwards and reaching the boundary with the overlying sulfidic zone.

The Speaker

Nabila GACI - Department of Geologic Sciences, FSBSA-Mouloud Mammeri University- UMMTO, Tizi Ouzou, Algeria. Metallogeny and Magmatism Laboratory of Algeria, FSTGAT- USTHB, BP 32 El Alia, Bab Ezzouar, Algeria.

Onsite: h. 17:00 Aula Pognante DST

Contacts: geoseminar.dst@unito.it