CAJ | 학술논문

中国大陆科学钻探松科1井南孔青山口组二、三段岩心中发育有4段深水震积岩,赋存在青二段底部到青三段底部的深湖砂岩薄夹层中.标志性震积构造有阶梯状断层、震裂缝、角砾状构造、重荷构造、砂球-砂枕构造(假结核)、液化扭曲变形构造、肠状构造、液化砂岩脉、假泥裂,均属同生-准同生期的软沉积变形构造,缺少震浊积岩表明是原地震积岩.青山口组震积岩展示了震积岩的一个发育模式和沉积序列,该序列由地震作用强烈时期发育的液化变形下部单元和地震作用衰减时期发育的塑性变形上部单元构成.松科1井南孔青山口组中火山物质与火山灰夹层共生.在金6井、金65井相当层位有橄榄粗安岩、火山角砾岩发育,乾124井、乾109井有玄武岩发育,这些井均位于孙吴-双辽超壳断裂一线,表明在青山口期有构造-火山事件的发生,震积岩是构造-火山事件引发的地震在深水环境中的记录.松辽盆地青山口期有构造-火山事件的发生,显示坳陷阶段也存在相当规模的断裂活动和火山喷发.
중국대륙과학찬탐송과1정남공청산구조이、삼단암심중발육유4단심수진적암,부존재청이단저부도청삼단저부적심호사암박협층중.표지성진적구조유계제상단층、진렬봉、각력상구조、중하구조、사구-사침구조(가결핵)、액화뉴곡변형구조、장상구조、액화사암맥、가니렬,균속동생-준동생기적연침적변형구조,결소진탁적암표명시원지진적암.청산구조진적암전시료진적암적일개발육모식화침적서렬,해서렬유지진작용강렬시기발육적액화변형하부단원화지진작용쇠감시기발육적소성변형상부단원구성.송과1정남공청산구조중화산물질여화산회협층공생.재금6정、금65정상당층위유감람조안암、화산각력암발육,건124정、건109정유현무암발육,저사정균위우손오-쌍료초각단렬일선,표명재청산구기유구조-화산사건적발생,진적암시구조-화산사건인발적지진재심수배경중적기록.송료분지청산구기유구조-화산사건적발생,현시요함계단야존재상당규모적단렬활동화화산분발.
Drilling core from Chinese Continental Scientific Drilling-SK-I(s) presents four sets of deep lake seismite from the lower part of the second member to the bottom of the third member of Qingshankou Formation. Typical structures of the seismites include step micro-fault, seismic fissure bed, autoclastic brecciated structure, load structure, ball-and-pillow structure (pseudonodule), vibration-induced liquefaction structure, enterolithic structure, liquefaction sand dyke and pseudo-mud crack. All of these synsedimentary-penecontemporaneous soft-sediment deformation and absence of seismo-turbidite indicate that the seismites in Qingshankou Formation are previous soft sediment reconstruction related to earthquake. Seismites of Qingshankou Formation exhibit typical developmental pattern and sedimentary sequence of seismite. This seismic sequence consists of the lower unit of liquefaction deformation corresponding to strong earthquake and the upper unit of plastic deformation corresponding to earthquake attenuation. Mudstone with few altered glass shards and volcanic ash interlayers simultaneously developed in Qingshankou Formation from SK-I(s). Mugearite and volcanic breccia developed in well Jin6 and Jin65 and basalt developed in well Qiani24 and Qian 109 during corresponding geological time of volcanic ash in SK-I(s). These four wells containing volcanic rock in Qingshankou Formation distribute along the Sunwu-Shuangiiao transcrustal fault, which indicates that tectonic-volcanic activities occurred during Qingshankou period in Songliao Basin and seismites recorded earthquake activities induced by tectonic-volcanic event in deep water. Existence of tectonic-volcanic event in Qingshankou Formation suggests that fault activities and volcano eruptions should be normal phenomena during the sag stage in Songliao Basin.