【摘要】 将渤海金州湾海域的声学浅地层剖面进行了综合分析和解释,识别出了8个连续的强声学反射界面,主要划定了具有沉积环境意义的6个声学层序:全新世浅海相层序A、全新世滨海相层序B、晚更新世末期陆相层序C、晚更新世滨海相层序D、晚更新世海陆交互相层序E和震旦系基岩F。通过与工程地质钻孔的沉积地层岩性单元对比研究,发现依据声学浅地层剖面进行的地层划分与钻孔岩芯的地质地层划分有较好的对应关系,由此确定并推断了各声学地层的岩性及沉积环境,并参考前人的研究结果,对晚更新世以来金州湾地区的沉积过程和环境演化进行了初步探讨。更多还原

【Abstract】 Acoustic subbottom profiles in the Jinzhou Bay of the Bohai Sea are synthetically analyzed and interpreted.Eight continuous strong acoustic reflection interfaces are recognized and six acoustic sequences which are significant for depositional environment are identified.These sequences include Holocene neritic sequence A,Holocene littoral sequence B,Late Pleistocene continental sequence C,Late Pleistocene littoral sequence D,Late Pleistocene marine continental interbedded sequence E and Sinian bedrock F.According to the comparison with the sedimentary stratigraphic and lithologic units resulted from the engineering geological drillings,the stratigraphic divisions based on the acoustic subbottom profiles are well corresponding to the geological strata of the drilling cores.Therefore,the lithology and depositional environment of the acoustic sequences are established and deduced,respectively.Combining with the previous studies,the sedimentary processes and environmental evolution experienced in the area of the Jinzhou Bay since the Late Pleistocene are preliminary discussed.更多还原