织金县新华磷矿区大戛矿段地质特征及成因浅析

Geological characteristics and genesis analysis of Dajia phosphate deposit in Xinhua phosphate mine area,Zhijin County

织金县新华磷矿区是贵州省三大磷矿区之一,大戛矿段处于新华磷矿区北东段。为系统查明大戛矿段矿床地质特征及矿床成因,通过工程控制手段,查明了矿区含磷岩系为寒武系纽芬兰统戈仲伍组。查明了矿体延展规模、矿体稳定程度及构造复杂程度。查明了矿石结构构造、矿石矿物成分及矿石主要化学成分。并对矿区范围空白区及矿体深部延伸外围邻区进行了找矿前景预测。通过综合分析矿床成因,认为大戛矿段磷矿床属于早寒武系梅树村期形成的海相沉积型磷块岩矿床。

Xinhua phosphate mine area in Zhijin County is one of the three major phosphate mines in Guizhou Province,and Dajia deposit is located in the northeast section of Xinhua phosphate mine area.In order to systematically find out the geological characteristics and genesis of Dajia deposit,by means of engineering control,the phosphate-bearing rock series in the area is found to be the Cambrian Newfoundland Gezhongwu Formation.The extension scale,stability and structural complexity of the ore bodies are cleared,as well as the ore structure,mineral composition and main chemical composition.The ore prospecting direction of the blank area in the mining area and the adjacent area around the deep extension of the ore body is predicted.Through comprehensive analysis of the genesis of the deposit,it is considered that Dajia deposit belongs to the marine sedimentary phosphate deposit formed in Meishucun period of early Cambrian.