周口坳陷早白垩世沉积相与沉积格局

SEDIMENTARY FACIES AND FRAMEWORK OF THE LOWER CRETACEOUS STRATA IN THE ZHOUKOU DEPRESSION

摘要: 周口坳陷早白垩世主要发育冲积扇相、河流相、湖泊相、扇三角洲相和三角洲相等类型,其中谭庄-沈丘凹陷沉积相带呈东西向狭长展布,是一个典型的断陷盆地。本文在讨论了湖盆的物源、古地形、古水流、水介质条件及古气候条件的基础上,提出了早白垩世时周口坳陷的沉积格局。
- 谭庄-沈丘凹陷 /
- 早白垩世 /
- 沉积相 /
- 沉积格局
Abstract: The sedimentary facies types of alluvial fans,fluvial deposits,fan deltas and normal deltaic deposits prevail in the Lower Cretaceous strata in the Zhoukou depression in which the Tanzhuang-Shenqiu facies zone appears in a EW-oriented narrow form.The sedimentary framework of the Zhoukou depression during Early Cretaceous time has been ascer-tained on the basis of the study of provenances,palaeotopography,palaeocurrent,water media and palaeoclimates.
- Tanzhuang-Shenqiu depression /
- Early Cretaeeous /
- sedimentary facies /
- sedimentary framework