CAJ | 학술논문

利用孢粉法、古气候指数法、元素纵向变化分析法、元素比值法等方法对20口井300余块样品进行了分析，研究了沙四段古气候特征，在此基础上分析古气候对滩坝沉积的控制作用。沙四段对应于喜热植物和喜温植物均较发育的温热适中的温度环境，也对应于湿生植物和旱生植物均较发育的中等略偏潮湿的湿度环境。下部温度较低、相对较干旱，上部温度偏高、偏潮湿。滩坝发育于较干旱的温热适中的气候环境，较干燥的环境使蒸发作用较大，有利于化学岩的形成和碳酸盐岩滩坝的发育。同时，适宜的气候条件使腹足类和介形类古生物大量发育，有利于形成生物湖相碳酸盐岩。
이용포분법、고기후지수법、원소종향변화분석법、원소비치법등방법대20구정300여괴양품진행료분석，연구료사사단고기후특정，재차기출상분석고기후대탄패침적적공제작용。사사단대응우희열식물화희온식물균교발육적온열괄중적온도배경，야대응우습생식물화한생식물균교발육적중등략편조습적습도배경。하부온도교저、상대교간한，상부온도편고、편조습。탄패발육우교간한적온열괄중적기후배경，교간조적배경사증발작용교대，유리우화학암적형성화탄산염암탄패적발육。동시，괄의적기후조건사복족류화개형류고생물대량발육，유리우형성생물호상탄산염암。
Using the cryptogam method,index method of palaeoclimate,element vertical alteration analysis method,element ratio method etc,we analyzed more than 300 examples in 20 wells and made a study of the palaeoclimate feature in Es4 sedimentation phase,and its influence on the development of carbonate beach and bar. The Es4 sedimentation phase corresponds to the temperate environment where both the philotherm and therophyte develops well. It also corresponds to the moisture environment where both the hydrophyte and xerophyte develops well. The lower part is of relatively low temperature and is relatively dry while the upper part is of relatively high temperature and is relatively damp. The carbonate beach and bar developing in the relatively arid area with moderate moisture since the relatively arid environment makes the evaporation stronger and is favorable for the chemical rock formation and carbonate beach and bar development. On the other hand,the suitable climate condition makes the palaeophyte gastropod and ostracodan develop in large quantity and is favorable for forming the biology carbonate rock in lake facies.