辽东湾盆地古近系沙河街组湖相热水沉积白云岩成因探讨[EB/OL]
北京：中国科技论文在线
关键词： 湖相白云岩 热水沉积 沙河街组 古近系 辽东湾盆地 Dai Chao-cheng 1,*
） 摘要： 辽东湾盆地古近系沙河街组地层中产有一套分布仅限于深凹陷内的深湖相白云岩
认为发育于旅大地区深凹陷内的沙河街组深湖相白云岩也属于罕见的具特殊成因意义的湖相热水沉积岩
） Abstract： The deep lacustrine facies dolomite exits in the stratum in Shahejie formation of paleogene in Liaodongwan basin , its distribution is only in the deep sag; the rock characteristic is dolomicrite mainly, and the matter coposition gives fist place to ankerite
It appears the very infertile interlayer in black mudstone of deep lacustrine facies , the accumulating thickness is about 6～10m
The outputing lacation is obviously controlled by western fracture of Liaozhong sag
Through the systematic study on sedimentology,petrology, mineralogy , geochemistry and the comparison of genetic characteristics of hydrothermal dolomite in Xiaogou formation of Qingxi sag in Jiuxi basin, shows that the deep lacustrine facies dolomite in Shahejie formation of deep sag developing in Lvda aera also belongs to lacustrine facies hydrothermal sedimentary rock ,which has the infrequently especial genetic meaning
Keywords： lacustrine facies dolomite
（ 1、 成都理工大学沉积地质研究院
郑荣才 1
以及与酒西盆地青西坳陷下沟组热水白云岩成因特征对比
