Objectif TO CARRY OUT COORDINATED STUDIES AND TESTS ON REPRESENTATIVE STRATA-BOUND ORE DEPOSITS IN SEDIMENTARY ROCKS (ESPECIALLY IN CARBONATES) FOR THE DEVELOPMENT OF NEW EXPLORATION METHODS. 1) COMPLEMENTARY STUDIES ON ORE DISTRICTS IN GERMANY, BELGIUM, FRANCE, GREECE, SARDINIA, SPAIN FOLLOWING THE COMMON STUDY SCHEME DEVELOPED WITH THE OTHER PROJECT PARTNERS. THE FOLLOWING ASPECTS WILL BE ESPECIALLY CONSIDERED: (A) PALEOGEOGRAPHIC SITUATION; (B) HOST ROCK LITHOFACIES; (C) GEOMETRY OF THE ORE BODIES AT LOCAL AND OUTCROP SCALE; (D) ORE COMPOSITION, INCLUDING SEDIMENTARY ORE ZONATION; (E) MINERAL INTERGROWTH PATTERNS; (F) DIAGENETIC EVOLUTION. 2) DETAILED STUDIES IN THE DIAGENETIC EVOLUTION OF STRATA-BOUND PB-ZN- (F-BA-AG-) DEPOSITS. THE MAIN PURPOSE OF THIS STUDY IS TO KNOW WHICH OF THESE TWO EXTREME POSSIBILITIES IS MORE CORRECT: I) THE LITHOFACIES OF THE HOST ROCK IS IMPORTANT MERELY IN SO FAR AS FAVORABLE OR NOT RECEIVE "MINERALISING SOLUTIONS". THE ORE FORMING PROCESS WOULD THEN TAKE PLACE DURING AN INDEPENDENT AND LATER STAGE THAN DEPOSITION AND EARLY DIAGENESIS OF THE HOST ROCK. II) THE LITHOFACIES OF THE HOST ROCK IS SIGNIFICANT BECAUSE IT REVEALS A PALEO-ENVIRONMENT IN WHICH ORE FORMING PROCESSES COULD TAKE PLACE DURING DEPOSITION AND EARLY DIAGENESIS OF THE HOST ROCK. IT IS EVIDENT THAT FOR EACH OF THESE TWO POSSIBILITIES THE EXPLORATION METHODOLOGY SHOULD BE COMPLETELY DIFFERENT. THERE ARE REASON TO BELIEVE THAT POSSIBILITY (II) IS THE CORRECT ONE IN MOST CASES. THIS WORKING HYPOTHESIS (II) IS BASED ESSENTIALLY ON PETROGRAPHIC OBSERVATIONS. WITHIN THIS PROJECT NEW INVESTIGATIONS ON THE GEOCHEMICAL, AND SPECIALLY ON THE "MICROGEOCHEMICAL", EVOLUTION DURING DIAGENESIS SHOULD TEST THIS HYPOTHESIS. Programme(s) PRE-RAWMAT 2C - Research and development programme (EEC) in the raw materials sector, 1982-1985 Thème(s) Data not available Appel à propositions Data not available Régime de financement Data not available Coordinateur UNIVERSITÄT HEIDELBERG Contribution de l’UE Aucune donnée Adresse 6900 HEIDELBERG Allemagne Voir sur la carte Coût total Aucune donnée
