从理论地层学原理探索延边地区柯岛群地层位置和沉积环境

在吉林省地层学研究中,柯岛群的定义、地层位置和形成环境的不同认识是近十年来争论的焦点。本文通过单位层型(剖面)、标准相模式法、瓦尔特定律、叠覆原理、包含物原理、变质原理等地层学和沉积学原理,结合公认的有关柯岛群的实际资料,探讨了十年来争论的焦点。结论是:柯岛群中的碎屑物主要由再沉积的火山碎屑和少量陆源碎屑,夹有硅质灰岩和硅质团块组成;层型剖面的定义,不容依层型区外的、不可追索的地质体属性来修订;宏观岩石学特征、沉积相模式及岩石化学成分特征,说明柯岛群的物源区为陆缘活动带或火山岛弧,属海相沉积;柯岛群的地层位置在开山屯组或解放村组之下。本文用理论地层学和沉积学原理探讨地层学研究中的疑难问题,实属尝试,供研讨和检验。

A probing into the strata position and depositional environment of Kedao Group in Yanbian region from theoretical stratigraphy

The different understanding of the definition of Kedao Group,strata position,and forming environment is the focus of debate over the past 10 years.Through the unit stratotype(section),standard facies model method,walter law,principle of overlap,principle of inclusions,principle of metamorphism,principle of stratigraphy,sedimentology,combining with recognized actual data about Kedao Group,discussed the focus of the debate.The conclusion is that Kedao Group is mainly composed of redeposit volcanic fragmental ...