A study of the middle Triassic deep-water sediments in Tianlin area, Guangxi

A suite of Middle Triassic turbidite with great thickness was observed in Tianlin area of Guangxi. On the basis of the sections measured in field survey, integrated with the previous researches, the authors carried out detailed studies of the lithofacies and facies associations in the study area. The results show that there exist six lithofacies which are composed of three main facies groups: Facies association 1 is dominated by sandy debris flows which represent the proximal channel- levee deposits; Facies associations 2 is dominated by typical turbidite deposits which represent the distal channel-levee deposits; Facies associations 3 is dominated by the distal turbidite deposits which represent the proximal lobe deposits. Based on the above analysis, together with the tectonic settings, provenance and the regional distribution of turbidite facies, the authors have established a depositional model for middle Triassic deep-water deposits in the study area.