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山东济阳坳陷下第三系始新统纯化钲组(原称沙河街组四段)地层,除局部地区遭剥蚀外,坳陷内皆接受沉积,全区广为分布.其碳酸盐岩储层—部分为高产油层,因而对其沉积环境进行研究甚为重要.多年来,地质工作者对本区沉积相的认识各持已见,争论颇多.有人认为是海相,也有人认为是湖相,还有人认为是海陆过渡相沉积.笔者持后一种观点.本文根据藻类、有孔虫、鱼类及介形类等门类化石资料的古生态特征分析,并结合岩矿资料,对纯化征组沉积环境进行了初步探讨.
The Lower Tertiary Pliocene Purpure Group (formerly known as the fourth member of Shahejie Formation) in the Jiyang Depression of Shandong Province, except for denudation in some areas, is widely distributed in the whole depression and its carbonate is widely distributed Rock reservoirs, which are partly high-yielding reservoirs, are therefore very important for the study of their depositional environment. For many years, geologists have known and discussed many of the sedimentary facies in this area. Some people think it is marine and others think Is the lacustrine, and some people think that the transitional sedimentary facies of the sea and the land.According to the author after a point of view.In this paper, based on paleoecological characteristics of algae, foraminifera, fish and ostracods and other fossil data analysis, combined with rock and mine data, The sedimentary environment of purification group was preliminarily discussed.