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Geologia
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ISBN10: 6630292758
ISBN13: 9786630292756
Publisher: Edizioni Sapienza
Published: Jul 27 2026
Pages: 80
Weight: 0.26
Height: 0.19 Width: 6.00 Depth: 9.00
Language: Italian
ISBN13: 9786630292756
Publisher: Edizioni Sapienza
Published: Jul 27 2026
Pages: 80
Weight: 0.26
Height: 0.19 Width: 6.00 Depth: 9.00
Language: Italian
Il massiccio ercinico di Terni-Mazgout (Boudoufoud), situato nella Meseta orientale marocchina, è costituito da una serie metasedimentaria scistosa-arenaria di età Visiana, in cui si è intruso un corpo granitoide zonato (259 11 Ma) e che è stato interessato da un'alterazione idrotermale multifasica (sericitizzazione, cloritizzazione, muscovitizzazione, greisizzazione). La mineralizzazione si presenta in forma disseminata o come riempimento di fratture, secondo tre distinte famiglie di filoni: N30-N45 (pirite-calcopirite-stibina in ganga quarzosa), N110-N120 (ematite) e N150-N160 (baritina-carbonati-quarzo). L'intero zoccolo paleozoico è ricoperto in discordanza angolare da una serie mesozoica, le cui argille rosse triassiche con intercalazioni basaltiche doleritiche costituiscono una potenziale fonte di ferro per il cappello di ossidazione supergena osservato. Queste caratteristiche testimoniano l'esistenza di un sistema magmatico-idrotermale multifasico, con sovrapposizioni epitermali e supergene, in un contesto strutturale di fratturazione ereditato dall'orogenesi ercinica.
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