地震地层学研究:墨西哥湾西部深海中的维拉克鲁兹舌状体 (Seismic stratigraphic investigation:Veracruz Tongue,Deep Southwestern Gulf of Mexico),Allen J.Bertagne,C.James Tsal (G—79) 维拉克鲁兹舌状体包括大陆坡和陆隆的沉积物。对两个多道测线和单次覆盖的火花震源资料进行详细研究后,在维拉克鲁兹舌状体的下端分出了五套主要的沉积层序。对它们的时代暂定为从中自垩世至全新世。在外部几何形态和内部反射结构的基础上,将这些序列进一步地划分为次一级的单元。在可能的地方还利用了岩心分析来帮助解释。沉积物包括浊流层的基部和末端、半深海沉积层和深海沉积层。所研究区域内,中渐新世以后的历史包括浊流汇入阶段,间夹以均一的沉积物堆积阶段。海湾西部深海中的区域等时图,表明了大规模的区域演化情况。为了获取地下更好的定量阻抗,从多道测线之一的近遒选排资料,利用覆盖法以子波形式表示出;对单次覆盖的输出则以真振幅形式表示。对重新处理资料的解释,增添了关于岩性及所含流体的信息。在背斜之下发现了两个亮点,在单斜层中发现有高振幅 Seismic stratigraphy study: Seismic stratigraphic investigation: Veracruz Tongue, Deep Southwestern Gulf of Mexico, Allen J. Bertagne, C. James Tsal (G-79) Veracruz tongue The body includes the continental slope and Lu Long sediments. After a detailed study of two multichannel survey lines and single-covered spark focal data, five major sedimentary sequences were separated at the lower end of the Vela Cruz’s tongue. Their time is tentatively scheduled for the period from the Cretaceous to the Holocene. Based on the external geometry and the internal reflection structure, these sequences are further divided into sub-units. Core analysis is also used where possible to help explain. Sediments include the basal and distal turbidite layers, semi-deep sea sediments and deep-sea sediments. The history of the Middle Oligocene in the studied area includes the phase of turbidity influx, with a uniform accumulation of sediments between the phases. The isochronous map of the area in the deep ocean in the western part of the Gulf shows the large-scale regional evolution. In order to obtain a better quantitative impedance of the underground, the near-ridges of one of the multi-line surveyed data are expressed in the form of wavelet using the covering method and the output of the single covering is expressed in the form of true amplitude. Interpretation of reprocessed data adds information about lithology and the fluids contained. Two bright spots were found under the anticline, with high amplitude found in the monoclinic layer