新疆莎车阿尔塔什剖面白垩—第三系界线的碳稳定同位素异常事件  

ABNORMAL EVENT OF CARBON STABLE ISOTOPE AT THE BOUNDARY BETWEEN CRETACEOUS AND TERTIARY IN ALTAX SECTION IN XINJIANG AUTOAORMOUS REGION

作　　者：唐文松[1] 钟筱春[1] 郭椿杰 严正[2] 叶莲芳 

机构地区：[1]石油勘探开发科学研究院 [2]国家地震局地质研究所

出　　处：《石油学报》1992年第2期209-214,共6页Acta Petrolei Sinica

摘　　要：新疆莎车阿尔塔什剖面白垩系—第三系界线的碳同位素研究表明,在白垩系—第三系交替时期,碳同位素曾出现明显的负异常,达-3.79‰,变化幅度达6‰,负异常最大值位于原划定的吐依洛克组底界以上1.4m。反映了在吐依洛克组开始沉积后不太长的时期内,地质环境发生了重大变化。The results of stable carbon isotope show that obvious carbon isotope negative abnor-mality up to-3.79‰ and a fluctuation up to 6‰, have been found at the transitional time be-tween Cretaceous and Tertiary. The maximun value of negative anomaly occurs at a point of1.4m above the base of Tuilok formation. This indicates that a great change in geological en-vironment took place not too long after the beginning of the deposition at the Tuilok forma-tion.

关 键 词：白垩纪 第三纪 碳同位素 

分 类 号：P534.53[天文地球—古生物学与地层学]