CAJ | 학술논문

通过对SK-1井泉头组岩心的详细观察与描述,并结合测井曲线特征,开展了泉头组沉积微相的识别,并在此基础上,划分了Ⅲ级、Ⅳ级、Ⅴ级及米级旋回。通过对所划分的旋回地层进行Fischer图解分析,建立了反映泉头组地层叠置关系的旋回地层格架。利用测井谱分析,结合前人分析测试得到的松辽盆地泉头组的绝对年龄,对各级旋回进行周期计算,发现Ⅴ级旋回周期约为112ka,Ⅳ级旋回周期约为379ka,分别与米兰科维奇偏心率短周期85～140ka和长周期350～400ka相对应,从而表明SK-1井旋回地层的形成受米兰科维奇旋回的控制。此研究结果为早白垩世气候变化对旋回地层的影响研究提供了科学依据。
통과대SK-1정천두조암심적상세관찰여묘술,병결합측정곡선특정,개전료천두조침적미상적식별,병재차기출상,화분료Ⅲ급、Ⅳ급、Ⅴ급급미급선회。통과대소화분적선회지층진행Fischer도해분석,건립료반영천두조지층첩치관계적선회지층격가。이용측정보분석,결합전인분석측시득도적송료분지천두조적절대년령,대각급선회진행주기계산,발현Ⅴ급선회주기약위112ka,Ⅳ급선회주기약위379ka,분별여미란과유기편심솔단주기85～140ka화장주기350～400ka상대응,종이표명SK-1정선회지층적형성수미란과유기선회적공제。차연구결과위조백성세기후변화대선회지층적영향연구제공료과학의거。
Based on the data of core and well logging of SK-1 well,this paper carried out the sedimentary microfacies identification,and divided cycle into third-order,fourth-order,fifth-order and meter-scale cycles.According to the cyclic sequence,this paper carried out the Fischer graphic analysis,and established cyclic stratigraphic framework.The absolute age ofQuantou Formation in SongliaoBasin was obtained by usingwell logging spectral analysis,and the cycle times were estimated.The result shows that the fifth-order cycle is 112 ka and fourth-order cycle is 379 ka,which is separately corresponding toMilankovitch eccentricity short circle 85~140 ka and Milankovitch eccentricity long circle 350~400 ka.The results coincide with the result of logging.This further illustrates that the forming of cycle sequence formation is controlled byMilankovitch cycle,which provides scientific foundation for the test of influencing factors of climate change in Cretaceous period.