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利用电感耦合等离子体发射光谱仪(ICP-AES)微量元素统计方法对东营凹陷沙四上亚段沉积期湖泊进行古环境分析可能是可行的。(Fe+Al)/(Ca+Mg)近岸高值(比值>1)向远岸湖相低值迁移的响应,特别是东营凹陷东部青坨子凸起边部的‘东营河’向西东营一带流入,形成较深水湖的>1低值响应。元素Fe和Mn化学性质差异明显,Fe3+常常是在河口或滨岸地带富集;而Mn2+在水盆内长距离的迁移中,沉积在较深的湖盆中心。因此Fe/Mn比值大致在0.7×102前后的变化,作为离岸向深湖水体深浅的变化标志。钙盐和镁盐的酸碱性介质有变化,Ca/Mg比值<5大致为河流相或近滨岸相;比值>5～10,甚至可达20,白云石矿物更多富集于湖盆南坡一带。Sr/Ba比值更多反映盐度和闭塞咸水湖相响应。在可溶性重碳盐、氯化物和硫酸盐进入水溶液中,Ba化合物或盐类的溶解度比值低于Sr。因此Sr/Ba比值<1是围绕着凸起边缘河流或近滨岸相一带,比值1～4之间为开阔湖相,比值4～>8更多可以作为是闭塞咸水湖相的响应。
Paleoenvironmental analysis of sedimentary lakes in the upper Es4 of Dongying depression may be feasible by using ICP-AES trace element statistical method. (Fe + Al) / (Ca + Mg) nearshore (ratio> 1) to the low-lying lacustrine migration, especially in the eastern part of the Dongtou sag A low value response to the formation of deeper lakes. The chemical elements of Fe and Mn are obviously different. Fe3 + is often enriched in estuarine and coastal areas, while Mn2 + is deposited in deeper lake basins in long-distance migration within the basin. Therefore, the ratio of Fe / Mn is about 0.7 × 102 before and after the change, as the depth of the lake to deep water changes in the flag. Calcium and magnesium salts vary in pH and pH, Ca / Mg ratios <5 are roughly either fluvial facies or near shore facies; ratios> 5 to 10 or even up to 20, and dolomite minerals are more abundant in lakes Southern slope area. The Sr / Ba ratio reflects more salinity and occluded lagoon phase response. When soluble heavy carbon salts, chlorides and sulfates enter the aqueous solution, the Ba compound or salt has a solubility ratio lower than Sr. Therefore, the ratio of Sr / Ba <1 is around the marginal edge of the river or near the bank, with a ratio of 1 to 4 for the lacustrine facies. The ratio of 4 to> 8 can be regarded as the response of the closed lagoon phase.