The Distribution of Cenozoic Intrusive Rocks in the Northern Jiangsu Basin and Its Geological Significances

• 责任者：Ye Shaodong (Geological Scientific Research Institute of Jiangsu Oilfield Company ; SINOPEC ; Yangzhou 225009 ; China) ; Ren Hongmin
• 刊名：Geological Review
• 出版年：2010
• 卷期：56(2)
• 关键词：辉绿岩 ; diabase ; 煌斑岩 ; lamprophyres ; 油气勘探 ; petroleum exploration ; 苏北盆地 ; Subei Basin
• 页码：p.269-274
• 图表：4 illus., 1 table, 32 refs.
• 分类号：1003
• issnNo：ISSN0371-5736
• isbnNo：CN11-1952/P

It is concluded by drill cores observation and thin sections identification that the intrusive rocks in the North Jiangsu Basin are mainly composed of diabase and few lamprophyres, whose mineral and lithological features, logging response and seismic reflection characteristics are obviously different from sedimentary rocks. Based on statistical data of drilling and logging, combined with result of 3D seismic data interpretation, the distribution of intrusive rocks have the following characteristics: 1)yes">  vertically, the most important horizon is the Paleocene Funing Formation, secondly, the Eocene Sanduo and Dainan Formation; 2) the thickness of a single layer is generally from several meters to several dozens meters; 3) there are three intrusive types, including bedding intrusion, cut-bedding intrusion and along fault intrusion; 4) horizontally, the distribution area of the intrusive rocks is more than looo km²,which are widespread in the Gaoyou sag and the Jinhu sag with the shape of dish or string of beads.