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晚三叠-中侏罗世华南陆缘发生多期海侵-海退旋回.元素地球化学特征指示的古盐度高低和古水深深浅记录了海平面的相对升降.华南陆缘存在3个级别的海平面变化.其中,Ⅲ级海平面波动频繁,由晚三叠世3次波动、早侏罗世4次波动和早、中侏罗世2次波动构成了此间大规模海侵-海退旋回.华南陆缘Ⅰ级海平面相对升降曲线与全球海平面长周期曲线,在诺利克阶早期-辛涅缪尔阶晚期变化同步,在辛涅缪尔阶晚期-阿连阶变化相悖.Ⅲ级海平面相对升降曲线与全球海平面短周期曲线,在瑞替阶-辛涅缪尔阶晚期同发生4次波动,时间上近乎同步.Sr/Cu值指示的元素迁移与富集反映了气候的温湿与干热.粤中-粤东地区晚三叠-早、中侏罗世经历了温湿-干热-温湿的气候变化.
Late Triassic-multistage transgression-regressive metasomatism occurred in the mid-Jurassic continental margin of the South China Sea.The paleosalinity indicated by elemental geochemical characteristics and paleo-water depth recorded the relative sea-level rise and fall.They have three levels The sea level fluctuation of Grade III is frequent with three fluctuations in Late Triassic, four fluctuations in Early Jurassic and two fluctuations in Early Jurassic and Middle Jurassic, The relative sea level Ⅰ-level sea level rise-and-fall curve of the South China Sea is in synchronic with the global sea level long-period curve, which changes in the early stage of Norlich-Sinn Muir phase, and contrary to the Aarnerian order in the Sinn Muir stage. The relative sea level curve and the global sea level short-period curve fluctuate four times in the same period of Reid-Nirvanairos, and are almost synchronous in time.The element migration and enrichment indicated by Sr / Cu reflect the climate Of the warm, humid and dry.Yuezhong - eastern Guangdong Late Triassic - Early and Middle Jurassic experienced warm and humid - dry heat - temperature and humidity of climate change.