河南偃龙煤田深部硫铁矿地质特征

Geological characteristics of pyrite deposit in the deep of Yanlong coal field in Henan

河南偃龙煤田深部主矿产为铝土矿,资源量为2.49亿吨,为全国第一。其共生矿产有硫铁矿、耐火黏土、铁矾土、菱铁矿。其中硫铁矿资源量已达2.19亿吨,硫3097.62万吨。为在开采铝土矿时综合开发硫铁矿,通过研究硫铁矿与铝土矿等共生矿产在厚度上的相变关系、在化学成分上的相变关系,查明了偃龙煤田深部硫铁矿的地质特征,厘定了硫铁矿的控矿因素,总结了硫铁矿的找矿标志。运用找矿标志可找到沉积型硫铁矿,运用相变关系估算资源量,可以增加资源量,从而增加矿山的经济效益。

The main mineral resources in the deep part of Henan Yanlong Coalfield is bauxite,with a resource amount of 249 million tons,ranking the first in the country.There are associated with the paragenetic mineral resources of pyrite,refractory clay,laterite,and siderite.Among them,pyrite resources have reached 219 million tons and sulfur is 30,976,200 tons.In order to comprehensively develop pyrite in the mining process of bauxite,the geological characteristics of pyrite deposit in the deep of Yanlong coalfield has been investigated by studying the phase change relationship between pyrite and bauxite in thickness and chemical composition.The ore-controlling factor of pyrite orebody is determined,and the prospecting sign of pyrite orebody is summarized.The prospecting signs can be used to find out the sedimentary pyrite deposit,and the phase transition relationship is used to estimate the amount of resources and the amount of resources is increased.Thereby the economic benefit of the mine is increased.