【摘要】 目前湖相碳酸盐岩是国内外沉积学研究的薄弱环节。应用层序地层学方法,以济阳坳陷沾化凹陷埕东地区沙一段的湖相碳酸盐岩为例,详细探讨湖相碳酸盐岩的层序地层学发育模式、层序地层单元划分级次以及控制因素等问题,重点对湖相碳酸盐岩准层序的类型、识别标志、形成机理以及对比模式进行了研究。研究表明,湖相碳酸盐岩可总结为陡坡和缓坡2种层序地层学发育模式;其高精度层序地层单元可划分为层序、体系域、准层序组、准层序、微层序5级;准层序类型可划分为陡坡型、缓坡型和深洼型3大类和L—M型、滩坝型、滑塌型、深水蒸发型4小类,不同类型的准层序形成的主控因素各不相同;准层序的对比模式可总结为陡坡突变和缓坡第变2种模式,在不同模式中准层序发生有规律的变化。更多还原

【Abstract】 In spite of great economic sigificance, very little is known about the lacustrine carbonate rocks both at home and abroad. By the method of applying sequence stratigraphy, this paper particularly analyses the sequence developing model, sequence gradation division and controlling factors on lacustrine carbonate rocks, and put emphasis on parasequence types, distinguishing symbol, forming mechanism and correlation model. As a result, the sequence model of lacustrine carbonate rocks is summed up as steep slope model and gentle slope model. The units of high-resolution sequence are divided into sequence, tract system, parasequence sets, parasequence and microsequence. The parasequnce types are divided into steep slope type, gentle slope type and deep sag type, also divided into limestone-marl,shore,slipping and deep-water evaporate, and the controlling factor of different kinds of parasequence is different. The contrasting models of parasequence are summed up as abruptly changing model of steep slope and gradually changing model of gentle slope, parasequence can regularly charge under different models.更多还原