Obiettivo TO DEFINE THE GEOLOGICAL CONTROLS OF MINERALISATION, WHICH OCCURS BOTH IN OLIGO-MIOCENE VOLCANICS AND IN MIOCENE TRANSGRESSIVE SERIES, IN ORDER TO IMPROVE EXPLORATION CONCEPTS. THIS INVESTIGATION WILL BE CARRIED OUT IN TWO AREAS OF SARDINIA: THE NORTH-WEST AND THE SAN PIETRO ISLAND. PRELIMINARY WORK IN THE NW HAS ALREADY SHOWN THAT MN ORE OCCURS IN TWO DIFFERENT SETTINGS: 1) AS SHOWINGS (MINOR STOCKWORKS, FAULT ZONES...) IN CALCALKALINE VOLCANIC, 2) RECONCENTRATED, AFTER A PERIOD OF WEATHERING OF THE VOLCANICS, AS THE CEMENT OF A CONGLOMERATE AT THE BASE OF TRANSGRESSIVE MIOCENE LIMESTONES. ON THE ISLAND OF SAN PIETRO, MN-RICH LAYERS ARE INTERBEDDED WITH TUFFS IGNIMBITES AND JASPERS. INVESTIGATIONS WILL CHIEFLY CONSIST OF: - DETAILED MAPPING AT 1/10.000 OF ZONES OF POTENTIAL INTEREST, IN ORDER TO PICK OUT OR CONFIRM THE PROMISING METALLOTECTS; - WORK ON THE PALEOGEOGRAPHY OF THE VOLCANIC BASEMENT OF THE MIOCENE, TO FIND ZONES OF PREFERRED SECONDARY CONCENTRATION OF MN ORE; - LITHOGEOCHEMICAL STUDIES OF VOLCANICS AND SEDIMENTS, TO ESTABLISH POSSIBLE LINKS BETWEEN MINERALISATION AND COUNTRY ROCKS (PARTICULARY TUFFS); - WORK ON THE PETROGRAPHY, MINERALOGY AND CHEMISTRY OF MINERAL OCCURRENCES, ON SAMPLES TAKEN AT VARIOUS STAGES OF THE RESEARCH FROM SURFACE OUTCROPS AS WELL AS FROM BORE-HOLES AND TRENCHES (DRILLING AND TRENCHING OPERATIONS ARE NOT INCLUDED IN THIS CONTRACT; - GEOPHYSUCAL SURVEYS. Programma(i) PRE-RAWMAT 2C - Research and development programme (EEC) in the raw materials sector, 1982-1985 Argomento(i) Data not available Invito a presentare proposte Data not available Meccanismo di finanziamento Data not available Coordinatore Ente Minerario Sardo Contributo UE Nessun dato Indirizzo Via 29 Novembre 41 09123 Cagliari Italia Mostra sulla mappa Costo totale Nessun dato
