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利用钻、测井及地震等资料和技术,对松辽盆地古龙断陷营城组一段火山岩特征及火山喷发模式进行研究。结果表明,研究区发现有火山熔岩、火山碎屑熔岩、火山碎屑岩和沉火山碎屑岩4类火山岩石类型,主要发育爆发相、喷溢相和火山沉积相3种火山岩相。平面上,爆发相火山岩主要发育在研究区北部,沿各级控陷断裂呈串珠状分布;喷溢相火山岩沿断裂向构造低部位运移,在研究区大部分地区都有分布;火山沉积相主要分布在断陷的构造低部位。根据研究结果建立了研究区火山岩沿各级控陷断裂喷发的裂隙-中心式喷发模式。
Based on the data and techniques of drilling, logging and seismic data, the volcanic rocks and volcanic eruption patterns of the first member of Yingcheng Formation in the Gulong Faulted Depression, Songliao Basin, are studied. The results show that volcanic lava, volcaniclastic lava, volcaniclastic rocks and Shenhuamanshan volcanic rocks are found in the study area. There are three types of volcanic facies including eruptive facies, spouting facies and volcanic sedimentary facies. In the plane, the eruptive volcanic rocks are mainly developed in the northern part of the study area, and the fault-controlled faults are beaded along the faults. The jet-lava facies migrate to the lower part of the structure along the fault and distribute in most of the study area. The volcanic sedimentary facies Mainly distributed in the lower part of the fault structure. According to the research results, the fissure-center eruption pattern of volcanic rocks erupted along fault-controlled faults at all levels was established.