| 摘要：泰国湾第四系显示出很好的旋回性。通过高分辨率二维地震(布玛)剖面图及工程钻井资料，共识别出8个准层序。在典型准层序中，沉积物自下而上，从海相泥沉积逐渐过渡为泛滥平原沉积。在每个准层序顶部都发育下切河体系及古土壤层，说明在每个准层序形成之后，都曾暴露过地表并遭受到侵蚀。每个准层序都代表一个海进和海退的过程。这些准层序的厚度为6～22m不等，平均厚度13m左右。通过与第四纪氧同位素曲线对比得出，这8个旋回的形成年代可追溯到距今730～10ka，平均91ka为一个循环周期，表明这些旋回应该是由气候因素所驱使的海平面升降导致的。该频率的气候变化周期相当于Milankovitch旋回中地球围绕太阳运动椭球体偏心率的变化周期，因此，泰语论文范文，在更早的地质历史时期中，类似的旋回也应该存在，泰语论文，并具有全球可对比性。 Abstract：The Gulf of Thailand quaternary showed good cycle. Through high resolution 2D seismic profiles (boomer) and engineering drilling data, and identified 8 parasequences. In a typical parasequence in sediments from marine mud from the bottom up, a gradual transition to the flood plain deposit. The top of the sequence are incised river systems and ancient soil layers in each, in each parasequence formation, have exposed surface and subjected to erosion. Each sequence represents a quasi process of transgression and regression. The parasequence thickness is 6 ~ 22m range, the average thickness of about 13m. Through analysis and quaternary oxygen isotope curve comparison, we can find that, dating back to dating to 730 ~ 10kA, average 91ka for a cycle the eight cycles of formation, indicating that these cycles should be driven by climatic factors, the rise and fall of sea level caused by. The frequency of the climate change cycle is equivalent to the Milankovitch cycles in the earth around the sun sports ellipsoid eccentricity ratio change cycle. Therefore, in the earlier period of geological history, similar cycle should exist. And has a global comparison. 引言：0简介泰国湾第四系主要为河流相和浅海相沉积。泰国矿产资源部于1987—1996年间,沿泰国湾海岸线进行了勘查[1]。第四系被分为两个单元,下部直接覆盖在前新生代基岩之上,距今400～10ka,上部主要由海相泥岩构成,被认为是全新世沉积。在Pattani盆地(图1)海平面以下1200～3500m的 |
