A New Understanding about the Volcanic Distribution Characteristics and Eruption Mechanism of Yingcheng Formation in Xujiaweizi Fault Depression

• 责任者：Jiang Chuanjin (College of Earth Sciences ; Daqing Petroleum Institute ; Daqing 163318 ; China) ; Chen Shumin
• 刊名：Acta Petrologica Sinica
• 出版年：2010
• 卷期：26(1)
• 关键词：火山岩 ; volcanic rocks ; 喷发作用 ; eruptive processes
• 页码：p.63-72
• 图表：19 illus., 18 refs.
• 分类号：0801
• issnNo：ISSN1000-0569
• isbnNo：CN11-1922/P

Based on well data and concatenating processed 3D seismic data of the deep layer in Xujiaweizi fault depression, also with the isotopic age determination technique, a research about volcanic distribution characteristics and volcanic eruption mechanism is carried out. The volcanic rock of Yingcheng Formation is divided into two sets. Normal fault, reverse fault, strike-slip fault and flower-pattern fault are all developed in this area. The convergence area of the faults of two directions is the main magma eruption channel. The volcanic eruption pattern of Yingcheng Formation can be summarized as fissure volcanic eruption, central volcanic eruption and compound volcanic eruption.