Title: Geology of petroleum and coal deposits in the North China Basin, Eastern China
Abstract: The North China basin evolved initially from a rifted intracratonic graben system on the east-central Sino-Korean platform during the jurassic and Cretaceous Yanshanian orogeny.The basin reached its maximum stage of graben development in the Neogene owing to reactivation of the rift by the Himalayan orogeny.The basin consists of seven major depressions: Jizhong, Dongpu-Kaifeng, Huanghua, Jiyang, Bozhong, Liaodong Wan-Liao He, and Linqing.The Linqing, however, is currently nonproductive with respect to petroleum and coal.Within the basin, geophysical data indicate that extensional rifting is still active today.At the end of the Early Proterozoic, after consolidation of the Precambrian crystalline basement, the site of the present-day North China basin was tectonically relatively stable from the Middle Proterozoic to the early Mesozoic.During that period, the Archean and Early Proterozoic basement was affected chiefly by epeirogenic movements in association with the sedimentation of littoral to neritic marine and continental platform carbonate and detrital sedimentary sequences of Middle to Late Proterozoic, Cambrian to Middle Ordovician, and Late Carboniferous to Permian ages.From the beginning of the Late Ordovician to the end of the Early Carboniferous, the sedimentary cover of the platform was subjected to extensive weathering and a long period of erosion.In the