Deep tectonic processes and super-accumulation of metals
published: Jan 1, 2003
ArtNo. ESP136000800049, Price: 19.00 €
Super-accumulation of metals means exceptional large ore deposits with very large ore reserves, which have been called so far by different names as superlarge ore deposits, supergiant ore deposits, gigantic ore deposits, world-class ore deposits, and so on. As they are identical, we propose a unified term of exceptional large ore deposits. From the viewpoint of ore-forming process, the exceptionally large ore deposits are characterized by an explosive anomaly of mineralization. The explosive anomaly usually includes plenty of metal supply, exceptional metallotect convergence and stable physico-chemical conditions needed for super accumulation of metals. This is especially dependent on ore-forming elements, deposit types, metallogenic geochronology, and geological settings. The minimum reserve criteria of exceptional large ore deposits have been proposed for 17 ore-forming commodities, and the exceptional large ore deposits have been selected from the class of world deposits. Their macroscopic distribution generally shows concentration in two gigantic active belts, four stable massifs and on a transitional zone between those two tectonic units. The specific localities could be defined by exceptional metallotect convergence.