东濮凹陷古近系沙河街组火山作用与盐岩成因  

Volcanism and Halite Genesis in Shahejie Formation of Paleaogene in Dongpu Depression

作　　者：薛国刚[1] 高渐珍[2] 

机构地区：[1]中原油田分公司采油四厂,河南濮阳457001 [2]中原油田分公司勘探开发科学研究院,河南濮阳457001

出　　处：《石油天然气学报》2011年第1期53-56,75,共5页Journal of Oil and Gas Technology

基　　金：国家"十一五"科技重大专项(2008ZX05000-006-01)

摘　　要：通过对东濮凹陷盐岩及火山岩的研究发现,虽然火山岩分布在凹陷南部,盐岩分布在凹陷北部,但它们的发育层位一致,具有等时异相的特征。结合东濮凹陷构造及演化特征分析认为:古近系盆地的不断伸展引发了火山活动,火山作用导致湖水咸化,密度大的盐水下沉,在湖底形成高密度热卤水;受南高北低古地形影响高密度热卤水自南向北流动,随着温度的降低在凹陷北部湖底低洼处形成化学沉积盐岩。认为东濮凹陷盐岩为盆内高密度热卤水成因。By studying volcanic and saline rocks in Dongpu Depression,it was found out that they had features of equitime and heteropic facies,although volcanic rocks were distributed in the south,while saline rocks were distributed in the north.Based on the analysis of tectonic evolutional characters in Dongpu Depression,it was considered that volcanism was caused continuously in the Paleaogene basin,it induced lake water saline,dense lake water sunk onto the lake bottom and created hot brine with high density.Heavy geothermal brine flowed from the south to north,deposited in the north low-lying lake bottom as the temperature falling down,and formed saline rock by chemical sedimentation.Therefore heavy geothermal brine is the main mechanism of saline rocks in Dongpu Depression.

关 键 词：东濮凹陷 沙河街组 火山作用 卤水 盐岩 

分 类 号：P618.13[天文地球—矿床学]