| 摘要: |
| 陆相盆地沉积作用主要受构造作用及古气候的控制,所以从区域构造背景出发,结合地层、古生物、沉积、地球化学等方面资料.对小洼油田东营组的沉积环境条件进行综合分析.确定了沉积物源来自北东方向的中央凸起,古气候属于半干旱一半潮湿的温带气候条件。水介质是弱还原性的淡水滨浅湖泊沉积环境.此时中央凸起上丰富的风化剥蚀产物经过河流的搬运和分异作用,进入湖盆中形成三角洲沉积体。 |
| 关键词: 沉积环境 物源区 古气候 水介质 三角洲 |
| DOI： |
| 附件 |
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| 基金项目: |
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| SEDIMENTARY ENVIRONMENTS OF THE DONGYING FORMATION IN THE XIAOWA OIL FIELD,LIAOHE BASIN,LIAONING |
| Zhou Qi |
| (Qinhuangdao Institute of Petroleum Geology, Daqing Petroleum College) |
| Abstract: |
| Sedimentation in continental basins is generally controlled by tectonism and palaeocli-mates.The present paper focuses on the sedimentary environments of the Dongying For-mation in the Xiaowa oil field on the basis of the analysis of stratigraphic,palaeontological, sedimentary and geochemical data.The sediments are mainly derived from the central up-lift in the northeast.The palaeoclimates are semiarid and semihumid temperate climates, and the water media indicate weakly reduced freshwater littoral and shallow lacustrine en-vironments.The abundant weathering products were differentiated and transported by rivers into lakes to form the deltaic sedimentary bodies in the study area. |
| Key words: sedimentary environment source area palaeoclimate water medium delta |
