Abstract The Huanghua Depression is located between the Chengning Uplift and Cangxian Uplift, connecting with the Yanshan Fold Zone to the north. In the study area, the Ordovician is 600~800 m thick and mainly consists of limestones and dolostones. The Lower Ordovician can be divided into the Yeli Formation and Liangjiashan Formation, and the Middle Ordovician can be divided into the Lower Majiagou Formation, Upper Majiagou Formation, and Fengfeng Formation. The Lower Majiagou Formation. Upper Majiagou Formation, and Fengfeng Formation can each be further divided into the upper member and the lower member. The Upper Ordovician is missing In the Yeli Age and Liangjiashan Age of the early Ordovician, the study area was mainly a shallow restricted platform, in which there were several tidal flats and banks. The lithofacies palaeogeography throughout the Middle Ordovician showed strong cyclicity. In the early Early Majiagou Age, transgression occurred, and the whole study area was occupied by tidal flats In the late Early Majiagou Age, sea level rose further and most of the study area changed to a shallow restricted platform. In the early Late Majiagou Age, sea level fell, and tidal flats again dominated the area In the late Late Majiagou Age, sea level rose quickly and most of the study area changed to a relatively deep open platform In the early Fengfeng Age, the area changed to tidal flats In the late Fengfeng Age, the whole study area changed to a relatively deep open platform again. During the Ordovician, the study area underwent 4 marine transgression regression cycles In the late Late Majiagou Age marine transgression reached maximum.
About author: Zou Yuanrong, born in 1976, graduated from Petroleum Institute of Daqing in 1998. Now she studies in the University of Petroleum (Beijing), and is engaged in reservoir Sedimentology.
Cite this article:
Zou Yuanrong,Jin Zhenkui,You Weifeng et al. LITHOFACIES PALAEOGEOGRAPHY OF THE ORDOVICIAN IN HUANGHUA DEPRESSION[J]. JOPC, 2001, 3(4): 35-44.
Zou Yuanrong,Jin Zhenkui,You Weifeng et al. LITHOFACIES PALAEOGEOGRAPHY OF THE ORDOVICIAN IN HUANGHUA DEPRESSION[J]. JOPC, 2001, 3(4): 35-44.
