| 徐宪立,刘显,闫艳玲,李向前,禹明高.世界锡矿时空分布规律及成矿作用[J].矿产勘查,2020,11(4):671-678 |
| 世界锡矿时空分布规律及成矿作用 |
| Temporal and spatial distribution and mineralization of tin deposits in the world |
| 投稿时间：2019-10-31 |
| DOI： |
| 中文关键词: 锡矿床 形成时代 成因类型 成矿规律 |
| 英文关键词: tin deposit, metallogenic regularity, metallogenic type, formation age |
| 基金项目: |
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| 中文摘要: |
| 在全球范围内,锡矿床的分布具有明显的时空规律性。本文对锡矿床在全球范围内的形成时代特征及锡矿床在全球范围内的空间分布分带规律进行了讨论和总结,认为燕山期为原生锡矿的重要成矿期,新生代为砂锡矿的最重要形成阶段；并将锡矿在全球分布划分为3个主要的锡成矿带:环滨太平洋巨型锡矿成矿带、欧亚大陆陆内锡成矿带和中南非洲锡成矿带。在成因类型分析的基础上,总结锡成矿规律,提出富锡地壳的存在是锡矿床产出的前提,岩浆分异演化晚期的富含挥发分及富硅、富碱花岗岩侵入改造作用是锡富集成矿的关键因素。 |
| 英文摘要: |
| the distribution of tin deposits in the world has obvious regularity of time and space. Based on the analysis and study of the present situation of tin resources,this paper discusses and summarizes the characteristics of tin deposits' formation times in the global scope and the spatial distribution and zoning rules of tin deposits in the global scope. It is believed that Yanshanian period is the important mineralization period of primary tin deposits,and Cenozoic period is the most important formation period of placer tin deposits. The global distribution of tin deposits is divided into three main tin mineralization periods Belt:circum Pacific giant tin metallogenic belt,Eurasian Continental tin metallogenic belt and Central South Africa tin metallogenic belt. On the basis of statistics of genetic types,the metallogenic law of tin deposits is summarized,and the existence of tin rich crust is the premise of tin deposit production. The key factors of tin deposit enrichment and mineralization are the late stage of differentiation evolution,which is rich in volatiles,and the intrusion and transformation of silicon rich and alkali rich granites. |
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