松辽盆地北部深层一种罕见的矿物交代蚀变现象  

An unusual mineral metasomatic alteration phenomenon in north deep Songliao Basin

作　　者：李茹[1] 张民志[1] 沈光正[1] 杨连华[1] 

机构地区：[1]大庆油田有限责任公司勘探开发研究院,黑龙江大庆163712

出　　处：《大庆石油地质与开发》2007年第1期32-34,39,共4页Petroleum Geology & Oilfield Development in Daqing

摘　　要：通过单矿物提取获得了松辽盆地北部深层砾岩层高碱砾石中的一种光性特殊的矿物颗粒样品,通过对样品的能谱、扫描电镜、普通光学显微镜分析结果的深入研究,发现了一种罕见的闪石类矿物——富镁亚铁钠闪石。富镁亚铁钠闪石由榍石次生蚀变而来,是一种罕见的矿物交代蚀变现象,即榍石的钠铁闪石化,此现象对深层裂缝发育的砾岩带的储层演化研究有很大的意义。Through monomineral extraction, a mineral particle sample with special optic characteristic is obtained in highly basic gravel in deep boulder layer in north Songliao Basin. Through detailed research on sample analysis result from energy spectrum, scanning electron microscope and ordinary optical microscope, an unusual amphibole mineral is discovered-magnesium rich arfvedsonite, sourcing from secondary alteration of titanite, which is a very unusual mineral metasomatic alteration phenomenon, that is, natrium and magnesium amphibolization. This phenomenon has great significance in research on reservoir evolution of deep fracture developed conglomerate belt.

关 键 词：榍石 钠铁闪石 富镁亚铁钠闪石 碱交代 松辽盆地 

分 类 号：TE135[石油与天然气工程—油气勘探]