四川基性-超基性岩型镍矿资源分布、特点、勘查现状及建议

Distribution,Characteristics,Exploration Status and Suggestions of Basic-ultrabasic Nickel Ore Resources in Sichuan

在总结前人资料的基础上,对四川省镍矿资源分布、特点及勘查现状进行了分析。四川镍矿产出相对集中,主要分布在川西高原丹巴地区、攀西地区会理、米易-盐边和雅安市天全-芦山-宝兴一带。工业类型相对单一,均为基性-超基性岩铜镍硫化物矿床。全省范围内有镍矿产地51处,其中大型矿床2处,中型矿床5处,小型矿床9处。目前四川探明镍资源量59.06万吨,位列全国第七位。四川主要镍矿床总体上受康滇南北向构造带控制,镍矿成矿期主要为两期,分别为新元古代早期和二叠纪晚期,矿体均产于深大断裂附近,并与同时期的玄武质火山岩密切相关。四川镍矿勘查程度较低,勘查深度多在地下300 m范围内。受勘查投入、研究程度、自然保护地政策、部分勘查区入场困难等多因素影响,近年来四川镍矿勘查工作进展不大。杨柳坪、冷水箐、力马河三个预测靶区均具有较好的找矿潜力,值得下一步加大勘查投入,此外,天全-芦山-宝兴镍成矿带,金沙江结合带和甘孜-理塘结合带中分布的基性-超基性岩体在今后的工作中值得关注和研究。

Based on the summary of previous data,the distribution,characteristics and exploration status of nickel ore resources in Sichuan Province are analyzed.The nickel mineral resources in Sichuan are relatively concentrated,mainly distributed in Danba,Huili and Miyi-Yanbian in Pan-Xi region,and Tianquan-Lushan-Baoxing in Ya'an City.The industrial type is basic-ultrabasic copper-nickel sulfide deposits.There are 51 nickel deposits in Sichuan province,including 2 large deposits,5 medium deposits and 9 small deposits.At present,the proved nickel resources in Sichuan are 590,622 tons,ranking 7th in China.The main nickel deposits in Sichuan Province are generally controlled by the Kangdian north-south tectonic belt.The nickel ore mineralization period mainly consists of two stages of the early Neoproterozoic and the late Permian.The ore bodies all occur near deep faults and are closely related to the basaltic volcanic rocks of the same period.The exploration degree of nickel ore in Sichuan is relatively low,and the exploration depth is mostly within 300 meters underground.In recent years,the exploration of nickel ore in Sichuan Province has made little progress due to many factors,such as exploration investment,research degree,natural reserve policy,and difficulty in entering some exploration areas.The three predicted target areas of Yangliuping,Lengshuiqing and Limahe all have good prospecting potential,which is worthy of increasing exploration investment in the next step.In addition,the basic-ultrabasic rocks distributed in Tianquan-Lushan-Baoxing nickel metallogenic belt,Jinshajiang junction belt and Ganzi-Litang junction belt deserve attention and research in the future work.