摘要: Publisher Summary This chapter summarizes what is known about Archean volcanic regimes and their relationship to younger systems. Most rocks are concentrated within greenstone belts, long linear belts of relatively low grade supracrustal dominated by which surrounded rarely underlain granitoid rocks. These the granite-greenstone subprovinces Card Ciesielski (1986) typify cratons world over. The has been characterized as an active regime with abundant, largely bimodal volcanics, sediments representing alluvial-fluvial resedimented associations few sedimentary platforms, early extensional tectonic succeeded tight isoclinal folding diapiric emplacement granitoids. Greenstone were generally thought represent a single environment such as, amalgamated island arcs, back arc basins, or collapsed continental rifts. diversity Proterozoic orogens included development epicratonic basins (Windley, 1984) shallow water platformal clastic chemical basaltic
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