TECTONIC SETTING AND METALLOGENESIS OF THE PRINCIPAL SECTORS OF THE TETHYAN EURASIAN METALLOGENIC BE

来源 :Geotectonica et Metallogenia | 被引量 : 0次 | 上传用户:caikesbad
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Three global metallogenic belts were formed in the world during Mesozoic and post Mesozoic times. Two of them are situated along the western and eastern Pacific margins, and the third one——the Tethyan Eurasian metallogenic belt (TEMB) is related to the domain of Eurasian plate and flanked on the south by the Afro Arabian and Indian plates.The general tectonic evolution of the realm where the TEMB was formed is closely connected with the history of Tethys. The emplacement of ore deposits and the development of regional metallogenic units are related to a definitive time interval and to specific tectonic settings such as: (1) Intracontinental rifting along the northern margin of Gondwana and/or fragments already separated; (2) Oceanic environments (i.e. ophiolite complexes and ocean floor sediments) host podiform chromite deposits, volcano sedimentary cupriferous pyrite deposits (Cyprus type), stratiform manganese deposits, and sporadically PGE deposits; (3) Subduction related settings involve mainly porphyry copper deposits, hydrothermal massive sulphide polymetallic deposits, and epithermal deposits. So far identified mineralization of porphyry copper exceeds in the TEMB over 100 million tons of copper metal; and (4) Collision and post collision continent continent setting includes deposits of lead zinc, antimony, gold, in some sectors tin deposits, as well. The giant deposits of Li pegmatite occur sporadically. The TEMB is almost a continuously mineralized belt, but within it, some sectors display specific features of tectonic settings, association of elements, minerals and morphogenetic types of mineralization. Three global metallogenic belts were formed in the world during Mesozoic and post Mesozoic times. Two of them are situated along the western and eastern Pacific margins, and the third one - the Tethyan Eurasian metallogenic belt (TEMB) is related to the domain of Eurasian plate and flanked on the south by the Afro Arabian and Indian plates. The general tectonic evolution of the realm where the TEMB was formed closely with the history of Tethys. The emplacement of ore deposits and the development of regional metallogenic units are related to a definitive time interval and to specific tectonic settings such as: (1) Intracontinental rifting along the northern margin of Gondwana and / or fragments already separated; (2) Oceanic environments (ie ophiolite complexes and ocean floor sediments) host podiform chromite deposits, volcano sedimentary cupriferous pyrite deposits (Cyprus type), stratiform manganese deposits, and sporadically PGE deposits; (3) Subduction related se so far identified mineralization of porphyry copper exceeds in the TEMB over 100 million tons of copper metal; and (4) Collision and post collision continent continent setting includes deposits of The giant deposits of Li pegmatite occur sporadically. The giant deposits of Li pegmatite occur sporadically. The TEMB is almost a continuously mineralized belt, but within it, some sectors display specific features of tectonic settings, association of elements , minerals and morphogenetic types of mineralization.
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