CAJ | 학술논문

别勒滩区段位于青海察尔汗盐湖西部，前人认为察尔汗盐湖固体钾盐矿物以光卤石为主，在别勒滩区段西部发现有杂卤石，但并未引起足够重视，对杂卤石成因未做详细研究。本文通过对别勒区段七个钻孔样品的矿物鉴定及地球化学分析，发现别勒滩区段杂卤石以原生和准同生交代方式赋存，且以后者为主，多交代石膏等硫酸盐矿物产出，少量出现交代石盐现象。杂卤石主要分布于别勒滩中西部地区，整个别勒滩区段自西向东出现了以杂卤石为主渐变为以钾石盐—光卤石为主的分布规律。结合别勒滩区段晶间卤水的补给条件，研究认为别勒滩区段杂卤石形成是涩聂湖硫酸镁亚型湖水与先期形成的盐类矿物发生交代反应的结果。别勒滩地区杂卤石作为典型的陆相成因，对研究海相蒸发岩矿床中普遍存在的杂卤石成因具有一定的对比借鉴意义，海相蒸发岩矿床中的杂卤石可能是盆地形成的内陆盐湖湖水与早期沉积的盐类矿物发生交代反应形成，对寻找海相钾盐有一定的指示意义。
별륵탄구단위우청해찰이한염호서부，전인인위찰이한염호고체갑염광물이광서석위주，재별륵탄구단서부발현유잡서석，단병미인기족구중시，대잡서석성인미주상세연구。본문통과대별륵구단칠개찬공양품적광물감정급지구화학분석，발현별륵탄구단잡서석이원생화준동생교대방식부존，차이후자위주，다교대석고등류산염광물산출，소량출현교대석염현상。잡서석주요분포우별륵탄중서부지구，정개별륵탄구단자서향동출현료이잡서석위주점변위이갑석염—광서석위주적분포규률。결합별륵탄구단정간서수적보급조건，연구인위별륵탄구단잡서석형성시삽섭호류산미아형호수여선기형성적염류광물발생교대반응적결과。별륵탄지구잡서석작위전형적륙상성인，대연구해상증발암광상중보편존재적잡서석성인구유일정적대비차감의의，해상증발암광상중적잡서석가능시분지형성적내륙염호호수여조기침적적염류광물발생교대반응형성，대심조해상갑염유일정적지시의의。
The Bieletan section is located in western Qarhan Salt Lake,and there are 1.8 bt low assay solid potassium in S4 salt layer.This paper studied mineral identification and the geochemical analysis of seven cores samples from the Bieletan section.The polyhalite is in the presence of two modes:primary orign and penecontemporaneous replacement.Polyhalite mineral shows the phenomenon distributing around the lake,and polyhalite was formd by replacement with gypsum and other sulfate minerals,or even with halite.Studies suggest that the formation of polyhalite related to supplies of magnesium sulfate subtype brine.The polyhalite in the Beletan area reveals the mineral polyhalite commonly occurs in marine evaporite deposits formed by metasomatic replacement brine of land facies lake with early formed saline mineral. Therefore,the origin of polyhalite mineral in the Bieletan area has some indication significance for finding marine potash deposit.