CAJ | 학술논문

关于东营凹陷古近系咸化机制的争论已持续近三十年，其中沙四上亚段是该区最为重要的烃源岩之一，查明其咸化机制及沉积特征是重要且必要的。本文从沉积物、古生物、地球化学三方面着手，分析咸化机制中最重要的两个问题：盐源与成盐机制。结果表明：通过分析本区的沉积物(白云岩、海绿石及岩相组合)、古生物(中华直管藻等)、地球化学三方面特征，证明东营凹陷在古近系确实遭受过海水影响，并将时间具体到沙四上亚段的早期。海水是由地震引发的四期海啸所带来。在此基础上，分析得出研究区早期盐源以海水侵入为主，中后期以母岩风化造成的古盐释放、火山或岩浆活动、深层卤水上涌三种盐源为主，具有多种盐源分段控制的特点。成盐机制有机械成因、化学成因、生物成因及复合成因四种，具有海陆相盐类并存，成因复杂的特点。针对此特殊现象，本文提出从地球化学及阴极发光等方面对共存的海陆相碳酸盐岩进行区分，以期引起同行的关注与讨论。
관우동영요함고근계함화궤제적쟁론이지속근삼십년，기중사사상아단시해구최위중요적경원암지일，사명기함화궤제급침적특정시중요차필요적。본문종침적물、고생물、지구화학삼방면착수，분석함화궤제중최중요적량개문제：염원여성염궤제。결과표명：통과분석본구적침적물(백운암、해록석급암상조합)、고생물(중화직관조등)、지구화학삼방면특정，증명동영요함재고근계학실조수과해수영향，병장시간구체도사사상아단적조기。해수시유지진인발적사기해소소대래。재차기출상，분석득출연구구조기염원이해수침입위주，중후기이모암풍화조성적고염석방、화산혹암장활동、심층서수상용삼충염원위주，구유다충염원분단공제적특점。성염궤제유궤계성인、화학성인、생물성인급복합성인사충，구유해륙상염류병존，성인복잡적특점。침대차특수현상，본문제출종지구화학급음겁발광등방면대공존적해륙상탄산염암진행구분，이기인기동행적관주여토론。
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.