冶里－亮甲山组硅岩成因新探  

A NEW STUDY ON THE ORIGIN OF SILICALITE IN YELI AND LIANGJIASHAN FORMATION OF LOWER ORDOVICIAN

作　　者：张玉宾[1] 

机构地区：[1]胜利石油管理局地质科学研究院

出　　处：《石油勘探与开发》1996年第4期39-41,共3页Petroleum Exploration and Development

摘　　要：对系统取心井岩心样品的岩石学研究表明，下奥陶统亮甲山组结晶白云岩中的硅岩并非交代成因，而是后期充填在由怀远运动（亮甲山期末）形成的淋滤孔洞中的充填物，因为在硅岩内，具有明显的沉积特征和孔洞充填特征。以化学方式为主的充填作用，是造成这套白云岩地层储集性变差的主要原因。Based on the petrological study on core samples, the author discovered that in Yeli and Liangjiashan Formation of Lower Ordovician, there are distinct characteristics of pore-space filled with silicalite which may not result from the replacement, but the materials filling lately the leached pore-space formed by Huaiyuan movement, because the silicalite has obvious sedimentation and pore-spaces filling characters. This kind of filling dominated by chemical depositing is the main reason making the dolomite reservoir poor in quality.

关 键 词：华北地台 早古生代 岩溶作用 硅质岩 成因 

分 类 号：P581[天文地球—岩石学]