Ore Petrography and Evvironmental Evaluation of ore Minerals

A.Y. 2018/2019
6
Max ECTS
64
Overall hours
SSD
GEO/09
Language
Italian
Learning objectives
La parte pratica del corso intende fornire agli studenti la capacità di riconoscere e valutare, dal punto di vista micro-tessiturale, le associazioni di minerali metallici utili (ore minerals) caratterizzanti i principali tipi di giacimenti minerari, e presenti come minerali accessori opachi nelle rocce non mineralizzate. La seconda parte del corso intende introdurre gli studenti alle problematiche ambientali connesse con le suddette associazioni di minerali metallici in aree minerarie attive e dismesse (miniere, impianti, discariche).
Expected learning outcomes
Undefined
Course syllabus and organization

Single session

Responsible
Lesson period
First semester
Course syllabus
ORE PETROGRAPHY AND ENVIRONMENTAL EVALUATION OF ORE MINERALS
The course is intended to outline some major topics related to the study of metallic minerals both when concentrated in ore deposits ("ore minerals") and as accessory phases in unmineralized rocks ("opaque" minerals). The course comprises two parts, a practical part in laboratory and a part with class lecturing (2 cfu, 16 hours - run by Prof. Giovanni Grieco)
The practical part in laboratory (4 cfu, 48 hours - run by Prof. Marilena Moroni) is devoted to the study of opaque and ore minerals (from rocks and ore deposits) and their associations and microtextures by means of reflected light microscopy on polished sections.
The class lectures (2 cfu, 16 hours), held by Prof. Giovanni Grieco, outlines the fundamental topics about serious environmental problems derived both from specific ore mineral associations and from the modes of mining exploitation and processing of the ore minerals.
The practical part of the course is devoted to the identification and description of the most common and economically significant opaque and ore minerals, their textures and mutual relationships by means of metallographic, reflected-light microscopy. Practice is acquired by examining numerous high-quality polished sections from the main types of ore deposits inside and outside Italy. Mineral associations from the following deposit types are examined: (a) magmatic-hydrothermal and high-temperature hydrothermal deposits related to granitic magmatism (greisen, skarn, (Mo, W, Sn, Bi, Pb, Ag, Cu); mesothermal polymetallic veins, porphyry copper deposits); (b) metamorphic shear-zone hosted mesothermal polymetallic and gold vein deposits (Au, Ag, Cu, Pb, Zn, Bi, As); (c) epithermal deposits (Sb, Hg, Au, Ag); (d) volcanogenic and sedimentary-exhalative massive sulphide deposits and their metamorphosed and deformed equivalents (Cu, Fe, Pb, Zn, Ag); (e) deposits hosted in mafic-ultramafic magmatic rocks (Cr, Ni, Fe, PGE); (f) diagenetic deposits (Pb-Zn, U).
The topics of the class lectures are meant to outline the modes of alteration and transformation of the associations of ore minerals in response to exposure to weathering agents (percolating waters, air, etc.) in active and abandoned mining sites and plants (mining pits and galleries, processing plants, mining rock and tailing dumps) and the consequences on the environment. Attention will be especially devoted to the evaluation of processes like Acid Mine Drainage and to the technical and legal aspects related to this environmental problem
GEO/09 - MINING RESOURCES, MINERALOGIC AND PETROGRAPHIC APPLICATIONS FOR THE ENVIRONMENT AND FOR CULTURAL HERITAGE - University credits: 6
Practicals: 48 hours
Lessons: 16 hours