| 山东省东营凹陷沙四上亚段咸化机制特征 |
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| 关键词:Dongying Sag upper part of fourth member of Shahejie formation salinization tsunami salt source halogenesis |
| 基金项目:国家“十二五”科技重大专项重点油气勘探新领域储层地质与评价“薄互层-细粒储层地质与评价”(编号: 2011ZX05009-002) |
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| Characteristics of Salinization Mechanism on the Upper Part of Fourth Member of Shahejie Formation in the Dongying Sag, Shandong Province |
| The debate on the salty mechanism has been going on for nearly three decades in Dongying Sag, the upper part of fourth member of Shahejie formation, as the area's most important source rocks, its salty mechanism and sedimentary characteristics are important and necessary to be researched. Based on the research of sediment, palaeontology and geochemistry, the two most important aspects of the salty mechanism-salt source and halogenesis are analysised. The results showed that sedimentary (dolomite, glauconite, and lithofacies sets), paleontologists(ortonella), geochemical characteristics proved Dongying Sag was suffered from sea water on the upper part of Es4. The sea water were brought by four periods of tsunami that induced by earthquake. Based on these, the early salt source mainly is intrusion of sea water, in the middle and later periods, mother rock weathering that caused the release of the ancient salt, volcanic or magmatic activity, deep brine upwelling are the mainly salt sources. It has a variety of salt sources that control different interval. There are four kinds of halogenesis: mechanical origin, chemical origin, biogenesis and multiple genesis. With the coexistence of the land and sea saline deposit, its causes are complex. In response to this special phenomenon, marine carbonatite and lacustrine carbonatite are distinguished by the use of geochemical and cathodeluminescence. It can arouse scholars’ attention and discuss. |
| WU Jing,JIANG Zai-xing,QIAN Kan,XU Dan.2014.Characteristics of Salinization Mechanism on the Upper Part of Fourth Member of Shahejie Formation in the Dongying Sag, Shandong Province[J].Acta Geoscientica Sinica,35(6):733-740. |
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