Orogenic-type deposits and their metallogenic model and exploration potential

Identification of a new type mineralization often leads to discovery of a great number of ore deposits and ore provinces.Predicting and identifying new type mineralizations is an important aim of ore deposit study. To date the majority of orogenic-type gold deposits has been well shown by worldwide studies.However,the other commodities of orogenic-type are rarely discussed.This paper addresses the concept of orogenic-type deposits which formed by fluid systems mainly sourced from metamorphic devolatilization.The paper also develops genetic models for orogenic deposits at various scales,including deposit-,orefield/terrain- and province/orogen-scales.The genetic models are linked to a three-stage tectonic evolution of convergent orogens.According to these models,the transition from compression to extension of thickened accretionary or/ and collisional orogens is conducive to mineralizations; and the syn-orogenic ore-systems must be characteristically lagged behind compressional orogenesis.As case studies,orogenic-type silver,lead-zinc, molybdenum and copper deposits are reported in the paper.This implies that China has great potential for orogenic-type deposits.The logics and validity of the metallogenic models are evidenced by introduction of several successful ore deposit prediction.