贵州首次发现钛矿床——晴隆沙子大型锐钛矿矿床成因机制研究

Make a field investigation and testing on the volcanic activity of different lithofacies-paleogeographic environment and the content, formation of the anatase in the the eruption of emeishan basalt in western Guizhou. Qinglong large anatase deposits which was first discovered in Guizhou have took a focal analysis. Analysis deep background and geological environment forming the anatase in the emeishan basalt,as well as character of ths kind of the emeishan basalt.analysis the content of anatase in different weathering stage of the emeishan basalt. Further clarify the ore-forming geological characteristics of the Qinglong anatase deposits. Collecting the different weathering stage of the emeishan basalt and ore samples in the Qinglong anatase deposits, and then taking tests on the content, complete chemical analysis, microbeam analysis, trace elements, rare earth elements, isotope test and some other analysis of the anatase.Study a advantage geochemical condition forming anatase in ShaZi region of Qinglong area. Besides ,to dissect the formation of emeishan basalt bearing anatase in Shazi region of Qinglong area and the geochemical mechanism of titanium activation and migration in the long process of weathering into soil or metallogenic. Study on the sources, the ore-forming process and mineralization conditions of Qinglong anatase deposits. Analysis the forming particularity in Shazi region of Qinglong area. Then ,to explore the genetic mechanism of the Qinglong large anatase deposits. Finally, proposed the metallogenic model in Qinglong anatase deposits.

对贵州西部不同岩相古地理环境的火山活动及喷发的峨眉山玄武岩中锐钛矿的含量、形成进行实地调查、测试分析；对贵州首次发现的锐钛矿矿床- - 晴隆沙子大型锐钛矿矿床进行重点剖析，分析玄武岩中锐钛矿形成的深部背景和地质环境、形成锐钛矿的峨眉山玄武岩特点、晴隆沙子锐钛矿矿区不同风化阶段的峨眉山玄武岩中锐钛矿含量；进一步阐明晴隆沙子锐钛矿矿床的成矿地质特征；采集晴隆沙子锐钛矿不同风化程度峨眉山玄武岩及矿石样品，进行锐钛矿含量及化学全分析、微束分析、微量元素、稀土元素、同位素等相关测试分析；剖析晴隆沙子一带有利于锐钛矿形成的地球化学条件；解剖晴隆沙子地区含锐钛矿峨眉山玄武岩形成和漫长风化成矿作用过程中钛活化迁移的地球化学机制；研究晴隆沙子锐钛矿矿床形成的物质来源、锐钛矿的成矿过程、成矿条件等；凝练晴隆沙子地区锐钛矿形成特殊性；探寻晴隆沙子大型锐钛矿矿床的成因机制；提出贵州晴隆沙子锐钛矿矿床成矿模式。

通过四年研究，现已查明晴隆沙子大型锐钛矿矿床是二叠纪峨眉山玄武岩浆喷发过程中在潮坪-局限海台地形成的各种喀斯特洼地沉积环境下，辉石中与铁呈类质同象存在的钛大量解离于低温低压热水洼地中与氧结合形成大量锐钛矿，再经第四纪风化淋滤作用再富集形成的残坡积型锐钛矿矿床。在贵州首次发现的晴隆沙子大型锐钛矿矿床成因类型在全国属于首次发现，这进一步丰富了矿床学的成矿理论，这是贵州找矿领域又一个新的突破！.该项目已按时完成各项研究目标和研究内容，全面完成任务书的预期成果。