引用本文：邵磊,尤洪庆,郝沪军,吴国瑄,乔培军,雷永昌.2007.南海东北部中生界岩石学特征及沉积环境[J].地质论评,53(2):164-169,[DOI]:. .2007.Petrology and Depositional Environments of Mesozoic Strata in the Northeastern South China Sea[J].Geological Review,53(2):164-169.
1. State Key Laboratory of Marine Geology, Tongji University, Shanghai 200092 ; 2. CNOOC Ltd.-Shengzhen, Shenzhen, 518067
Abstract:Mesozoic marine facies sedimentary rocks recently found in the Chaoshan Depression from the northeastern South China Sea consist of mudstone,sandstone,radiolarian siliceous rock,interbedded oosparite,and volcanics of Middle Jurassic to Cretaceous age.Their petrologic and sedimentary characteristics indicate that depositional environments shifted from shallow marine to deep marine,before returning back to continental facies.There was a sharp break between deep marine and continental facies, indicating a sedimentation hiatus.Thin basalt(spilite)layers are often interbedded in those deep marine radiolaria-bearing siliceous rocks.Paleoclimate turned from humid in the Middle Jurassic to Early Cretaceous to arid in the Late Cretaceous.The existence of these Mesozoic marine strata is very important for interpreting the tectonic evolution of this region and the influence of the Tethys tectonic domain on the Pacific tectonic domain during the Mesozoic.
