贵州水城龙场锐钛矿矿床地质特征及成因

Geological characteristics and genesis of Longchang anatase deposit in Shuicheng County,Guizhou

水城龙场锐钛矿属与峨眉山玄武岩有关的低温热液沉积残坡积型矿床。通过收集、分析前人的研究成果及水城县龙场锐钛矿普查资料,矿体主要赋存在上二叠统峨眉山玄武岩组第三旋回顶部的强蚀变玄武岩中;呈层状、似层状产出;共圈定2个矿体,矿体厚1.00~10.00 m,均厚4.04 m;Ti O2品位为6.50%~8.12%,平均品位6.95%,333类Ti O2资源量57.20万t;矿石具细粒、微粒、微晶结构;土状、杏仁状、块状、网脉状构造;工业类型以锐钛矿为主,分布率为93.97%。主要为高钛峨眉山玄武岩喷发至地表,含钛矿物在低温、低压、弱碱环境下原地富集再经过风化淋滤作用形成的锐钛矿。本成果为今后在峨眉山玄武岩风化壳残坡积物内寻找钛矿提供参考。

The Longchang anatase deposit in Shuicheng County is a low-temperature Hydrothermal Sedimentary relict deposit related to the basalt in Mount Emei.By collecting and analyzing the research results of predecessors and the data of Anatase survey in Xiuwen County,Shuicheng County,the ore bodies are mainly located in strongly altered basalt at the top of the third cycle of the Upper Permian Mount Emei basalt formation The ore bodies are 1.00-10.00 m thick with an average thickness of 4.04 m,the grade of TIO2 is6.50%-8.12%and the average grade of TIO2 is 6.95%,the ore bodies have fine grain,fine grain and microcrystalline structure,and the ore bodies are of soil-like,almond-like,massive and reticulate structures,the distribution rate was 93.97%.ANATASE is formed when the high-titanium Mount Emei basalt erupts to the surface and the ti-bearing minerals are enriched in situ in low temperature,low pressure and weak alkali environment and then weathered and leached.The results can be used as a reference for the future exploration of titanium deposits in the residual slope deposits of weathering crust of Mount Emei Basalt.