松辽盆地南部火石岭组地层序列划分与区域对比

来源期刊:中南大学学报(自然科学版)2014年第8期

论文作者:瞿雪姣 王璞珺 姚瑞士 高有峰 白冰

文章页码:2716 - 2728

关键词:火山喷发旋回;地层序列;火石岭组;松辽盆地

Key words:volcanic eruption cycle; stratigraphical sequence; Huoshiling Formation; Songliao Basin

摘    要:从火石岭组沿革分析入手,以松辽盆地南部双辽、长岭、德惠、王府和榆树等5个断陷钻遇火石岭组的42口深层钻井,以及营城煤矿226孔和50孔层型剖面和盆缘野外剖面为对象,通过岩性和连井地震剖面进行对比研究。研究结果表明:火石岭组可分为2个岩性段。火石岭组一段为深色泥质岩与灰色砂岩不等厚互层的正常沉积岩,断陷边缘多为粗碎屑沉积。火石岭组二段以火山岩、火山碎屑岩夹沉积岩为特征。火石岭组二段自下而上包含5个火山喷发旋回,分别为中性熔岩旋回、酸性火山碎屑岩旋回、中基性熔岩旋回、偏碱性的中性熔岩旋回、酸性熔岩旋回。

Abstract: Stratigraphical correlation of the Huoshiling Formation was performed in 5 south fault depressions and southeast magin of Songliao Basin, including 42 deep drilling wells, stratotype section and field section. Lithologic correlation and seismic cross-sections correlation were analyzed. The results show that the Huoshiling Formation can be divided into two lithologic members. The first member is mostly interbedded with dark mudstone and grey sandstone, while coarse clastic rocks are developed in the margin of the fault depressions. Volcanic rocks and pyroclastic rocks dominate in the second member. From bottom to top, the second member consists of 5 volcanic eruption cycles: intermediate cycle, acidic pyroclastics cycle, intermediate-basic cycle, alkalic-intermediate cycle, and acid cycle.

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