摘要
通过对全球铁、锰、铬、铜、镍、钴、铝、铅、锌、钨、钼、锡、锑、金、银、铂族元素、锂等矿种1000多个大型—超大型金属矿床成矿地质年代与矿床类型数据资料统计分析,阐述了主要金属在全球暨4大成矿域的成矿演化特征.指出全球大型-超大型金属矿床具有如下显著特征:一是形成于所在地质构造单元/成矿单元的晚期构造-岩浆旋回或构造-岩浆-沉积旋回的晚期阶段,二是不少金属矿床在新生代表生地质活动过程中发生了再富集,三是新生代是全球大部分金属矿床形成的高峰期.笔者将这种成矿演化特征与机制称之为滞后成矿作用.滞后成矿作用在金属矿床历史演化中普遍存在.不同金属的滞后成矿作用与其元素地球化学性质密切相关,并受大地构造演化制约.
Abstract
By the statistical analysis of the data on the geological age and deposit types of over 1000 large-superlarge metallic deposits worldwide,including Fe,Mn,Cr,Cu,Ni,Co,Al,Pb,Zn,W,Mo,Sn,Sb,Au,Ag,PGE,Li,the metallogenic evolution characteristics of major metals in the globe and four major metallogenic domains are elaborated. Many large-superlarge metallic deposits worldwide form in the late stage of tectonic-magmatic cycles or tectonic-magmatic-sedimentary cycles in their geological structural units/metollogenic units. Many metals have undergone re-enrichment during the geological activities of the Cenozoic era,which is the peak period for the formation of most large-superlarge metallic deposits worldwide. This process and mechanism are called metallogenic hysteresis. Metallogenic hysteresis commonly exists in the global historical metallogenic evolu-tion. Metallogenic hysteresis of different metals is closely related to their elemental geochemical properties and is constrained by tectonic evolution.
万方数据