MIOCENE CALCAREOUS NANNOFOSSIL STRATIGRAPHY AND PALAEOENVIRONMENT OF WELL F2 IN THE PEARL RIVER MOUTH BASIN
This study presents a comprehensive analysis of calcareous nannofossils from the Miocene strata of Well F2 in the Lufeng Sag,Pearl River Mouth Basin,located in the northern South China Sea.A total of 90 samples were examined from the 824 to 1 715-meter depth interval,yielding a diverse assemblage of 10 genera and 34 species.Nannofossils are notably abundant in the upper section of the well(824～1 095 m),with a decrease in abundance or complete absence in the lower part(1 095～1 715 m).Eight calcareous nannofossil zones,namely NN11,NN 10,NN9,NN8,NN7,NN6,NN5 and NN4,were identified based on the presence of marker species,confirming a Miocene stratigraphic age.This study further investigates the depositional and palaeoenvironmental history by examining the abundance,diversity,and assemblage characteristics of the nannofossils.From the early Miocene to the late Miocene,well F2 experienced three stages of depositional environment evolution:inner shelf-coastal,coastal,and inner-middle shelf environments.
calcareous nannofossilbiostratigraphypalaeoenvironmentMiocenePeral River Mouth BasinSouth China Sea
NETL
NSTL
万方数据
