湘西北烽火矿区含钒钼石煤矿地质特征及矿床成因分析

Geological Characteristics and Genesis Analysis of Vanadium-Molybdenum Bearing Stone Coal Deposits in Fenghuo Mining Area in Northwestern Hunan

以湘西北烽火矿区为研究区,采用地质简测、工程揭露及样品分析等方法研究了区内寒武系纽芬兰统牛蹄塘组含钒钼石煤矿的地质特征。研究结果表明:区内寒武系纽芬兰统牛蹄塘组下部为主要的石煤赋存层位,底部常含V、Mo、Ni等金属元素;其中Ⅱ矿层伴生钒、钼矿平均品位达到综合评价要求,可与石煤共采。石煤厚度较大,且较稳定,发热量较高,石煤层顶底板的主要岩性均为黑色炭质页岩。本文在阐述成矿地质背景、矿区地质特征、矿体特征的基础上,总结认为矿床成因属于生物地球化学沉积矿床。

Taking Fenghuo mining area in northwestern Hunan as the research area,the geological characteristics of the Cambrian Newfoundland Niutitang Formation vanadium-molybdenum bearing stone coal mine in the area were studied by means of simple geological survey,engineering disclosure and sample analysis.The research results show that the lower part of the Cambrian Newfoundland Niutitang Formation in the area is the main stone coal occurrence layer,and the bottom often contains V,Mo,Ni and other metal elements among them,the average grade of associated vanadium and molybdenum ore in theⅡore layer meets the comprehensive evaluation requirements.It can be mined with stone coal.The stone coal is thicker,more stable,and has higher calorific value.The main lithology of the roof and floor of the stone coal seam is black carbonaceous shale.Based on the description of the metallogenic geological background,the geological characteristics of the mining area and the characteristics of the ore body,this paper concludes that the genesis of the deposit belongs to the biogeochemical sedimentary deposit.