论文部分内容阅读
前言苏北东台坳陷中部,特别是GY凹陷南部地区的火成岩极为发育,从新生代老第三系一第四系的地层中均有不同程度的分布。经钻井揭露在中新世以前属侵入岩(辉绿岩),中新世以喷发岩(玄武岩)为主兼有侵入岩,中新世以后主要是喷发岩。这些火成岩的存在给该区的地震勘探工作带来了困难及复杂性:首先遇到的就是火成岩与围岩间形成的强反射介面造成严重的多次波,以及它的屏蔽使深层反射微弱以至难于识别有
Foreword The igneous rocks in the central part of the northeastern Dongtai Depression in Jiangsu Province, especially in the southern part of the GY depression, are well developed. They are all distributed to varying extents in the Cenozoic Tertiary-Quaternary strata. The drilling revealed that before Miocene was an intrusive rock (diabase), Miocene mainly consisted of eruptive rock (basalt) with intrusive rock. After Miocene, it was mainly eruption rock. The existence of these igneous rocks brings difficulties and complexity to the seismic exploration work in this area. The first encounter is that the strong reflection interface formed between igneous rocks and the surrounding rocks causes serious multiple waves and its shielding weakens the deep reflection Difficult to identify there