黔中地区古构造环境对洋水矿区磷矿层的控制作用  

Controlling Effect of Central Guizhou Area Paleostructural Environment on Phosphorus Ore Bed in Yangshui Mine Area

作　　者：刘畅[1] 杨辉艳[2] 

机构地区：[1]中国煤炭地质总局地球物理勘探研究院,河北涿州072750 [2]中化地质矿山总局地质研究院,河北涿州072750

出　　处：《中国煤炭地质》2016年第11期38-42,共5页Coal Geology of China

摘　　要：贵州开阳洋水矿区东西翼深部矿体经过多年勘查工作,已证实为一特大型磷矿床。在矿区内下磷矿层为主要的赋矿层位,矿体分布存在一定的不均匀性。通过对矿区古构造环境,尤其是通过下磷矿层底板岩石的研究,模拟还原其古地貌,进而对水下古隆起的控矿作用进行深入研究。研究表明:黔中隆起制约着矿体分布;底板岩石(砂岩和含磷白云岩)的厚度与下磷矿层矿体的厚度有高度的相关性;矿区内部存在着由地势起伏导致形成古海水不同水深的沉积环境,水下古隆起周边深水浅水的过渡区域沉积成矿最佳,水体相对较深的区域矿体变薄或缺失;水下古隆起的坡度也影响磷的富集沉积。After many years of exploration works for the deep part ore body in east and west limbs of the Yangshui mine area, Kaiyang, Guizhou have already identified as an extra large phosphorus deposit. The lower phosphorus ore bed is the main phosphorus hosting horizon in the mine area; its distribution has certain unevenness. Through the study on mine area paleostructural environment, especially lower phosphorus ore bed floor lithology, simulated restoring its original landform, and then intensively studied ore controlling effect from underwater paleo-uplift. The study has shown that： the central Guizhou uplift restricted ore body distribution; floor rock （sand- stone and phosphorus-bearing dolomite） thickness and lower phosphorus ore body thickness are highly correlated; Yangshui mine area interior existed different paleo-sea water depths sedimentary environment formed by undulating terrain, paleo-uplift periphery deep- shallow water transitional region has been the best mineralization belt, while the relatively deep part ore body thinning or hiatus; the underwater paleo-uplift slope can also impact phosphorus enrichment.

关 键 词：洋水矿区 下磷矿层 底板岩石 古隆起控矿 沉积环境 

分 类 号：P619.2[天文地球—矿床学]