沉积叠加改造型矿床的物源及富集机制的地球化学研究

通过对长江中下游及邻区震旦系－早生古界内一些沉积叠加改造型锑－金矿床，银多金属矿床的物源及富集机制的地球化学研究认识到，在研究该类矿床的成矿作用时，不能仅仅局限在传统的认识和思维模式上，而是应该从更大的时，空域，用地球化学的思维去观察，去分析，它们的“源，运，储”，该类矿床成矿的有利因素，除了矿源层的物源基础外，其决定因素还在于后期叠加改造作用对成矿元素浓集能力的高低和效率强弱的控制。

Geochemical Study on Sources and Enrichment Mechanism of the Reformed and Super-inposed Sedimentary Deposit

Based on geochemical studies on sources and enrichment mechanism of several Sinian-Lower Paleozoic reformed and superimposed sedimentary deposits such as antimony-gold deposits and silver-polymetallic deposits in the lower and middle reaches of the Yangtze River and neighboring areas,the authors have acquired the following understandingFirst,when we study the ore-forming process of this kind of deposits,we should observe and analyse their source,transportation and reservior geochemically from a broader time-space domain instead of being confined to the traditional knowledge and mode of thinking.Second,the key factors of ore-forming process for this type of deposits include the advantageous material basis of the source bed(abundances of ore-forming elements,mode of occurrence)and,more decisively,the concentration capacity and the efficiency of the ore-forming elements derived from late reformation and superimposition.