锶矿是重要的战略性新兴矿产，其矿石矿物以天青石为主。通常认为天青石矿床是海水/湖水蒸发作用形成的同生矿床，即Sr在蒸发沉积过程中发生富集。然而，越来越多的地质证据显示，热液中的Sr可以在一定的条件下发生明显富集，形成大型-超大型热液天青石矿床，并与其他金属矿床呈共/伴生产出。但对于热液中Sr发生明显富集的原因，特别是与岩浆热液作用有关的天青石矿床中Sr的富集机制，目前还不清楚。本申请拟以湖北狮子立山超大型锶（铅锌）矿床为研究对象，对天青石和黄铁矿等矿物开展精细的显微结构和微区成分/S同位素及岩石/矿物的Sr同位素研究，拟查明矿床中Sr的来源，厘清矿床与岩浆作用的关系；揭示矿床中巨量Sr的超常富集机制。本项目不仅有助于深入认识Sr的元素行为，丰富天青石矿床的成矿理论，还能揭示类似天青石矿床中Sr的富集机制的相似性和差异性，为区内及长江中下游成矿带内天青石矿产的找矿勘查实践提供理论支持与参考。

Strontium deposit is important strategic emerging mineral deposit, and its ore mineral mainly occur as celestite. It is generally believed that most of the celestite deposits are syngenetic ore deposit formed by the evaporation of sea / lake water, and Sr was enriched during the evaporation and deposition process. However, more and more geological evidence shows that Sr included in hydrothermal fluid can be enriched under certain conditions, and even superfluous enrichment to form large-superlarge hydrothermal celestite deposit, and associated with other metallic mineral deposit. However, it is remains unclear that why does Sr could highly enrich in hydrothermal fluids, especially in magmatic hydrothermal processes. This application is intended to carry out detailed research on micro texture and in-situ components and/or S isotope of celestite and pyrite and other associated minerals, as well as Sr isotope of rocks / minerals in Shizilishan Sr(Pb-Zn) deposit, Hubei province, in order to constrain the origin of Sr from the deposit, clarify its relationship with magmatic process, and reveal the superfluous enrichment mechanism of huge amount of Sr in the Shizilishan deposit. This application would not only help to understanding the elemental behavior of Sr, but also would reveal the similarity and difference of the enrichment mechanism of Sr between Shizilishan and other hydrothermal celestite deposit from worldwide, and useful for celestite deposit exploration in the Edong district and the Middle-Lower Yangtze River metallogenic belt.