CAJ | 학술논문

在盐湖沉积演化过程中，钾镁盐在盐类矿物沉积的中晚期才开始结晶析出。因此，研究含盐系地层中盐类矿物的沉积地球化学特征，不仅可以从侧面获取岩盐的沉积物物质来源和成盐期古卤水蒸发浓缩程度等地球化学信息，而且可以直接揭示古盐湖期钾盐富集趋势及规律。目前，除在江陵凹陷的古近系沙市组等含盐系内发现了富钾卤水外，还在中－南部的钻孔盐矿盐岩中，发现了微量钾石盐和钾石膏，这些说明该凹陷古近纪具有成钾潜力。本文通过对 SK3井蒸发岩特征研究及岩芯中 K、Mg、Cl、Br 离子含量与 Br×103／Cl 系数的垂向变化分析，揭示古盐湖浓缩演化与钾盐富集趋势，进一步揭示该层段沉积时期及所在凹陷古盐湖卤水钾的富集程度。
재염호침적연화과정중，갑미염재염류광물침적적중만기재개시결정석출。인차，연구함염계지층중염류광물적침적지구화학특정，불부가이종측면획취암염적침적물물질래원화성염기고서수증발농축정도등지구화학신식，이차가이직접게시고염호기갑염부집추세급규률。목전，제재강릉요함적고근계사시조등함염계내발현료부갑서수외，환재중－남부적찬공염광염암중，발현료미량갑석염화갑석고，저사설명해요함고근기구유성갑잠력。본문통과대 SK3정증발암특정연구급암심중 K、Mg、Cl、Br 리자함량여 Br×103／Cl 계수적수향변화분석，게시고염호농축연화여갑염부집추세，진일보게시해층단침적시기급소재요함고염호서수갑적부집정도。
During the deposition of salt lake,potassium and magnesium salt began to crystallize out at the middle-late stage of salt mineral deposition.Therefore,studying the geochemical characteristic of halite obtains not only the source information of salt minerals but also ancient brine concentration and the trends of potassium enrichment regularity of the ancient salt lake.In the Paleogene Shashi Formation of Jiangling depression and other salt system,potassium-rich brines were found.The trace amount of sylvite and syngenite were found in salt rock of the formation of the Paleogene Shashi in salt mine and potash exploratory drill well.It shows that the area may have potential to exploit sylvite.Based on research of evaporite rocks features of SK3 well and vertical variation regularity of such coefficients of K,Mg,Cl,Br ions and Br × 103/Cl,it reveals the evolution of salt lake and the trend of potassium enrichment,and furtherly reveals potassium enrichment degrees of salt lake.