The Sedimentary Characteristics and Models of Paleogene Tempestites in Huimin Sag, Shandong Province

Key words: 
• tempestites /
• sedimentary characteristics /
• sedimentary models /
• Paleogene /
• Huimin sag

Abstract: The tempestites of Paleogene in Huimin sag was discussed based on cores, rock thin section, granularity analysis and log data. It can be seen that the tempestites in the area studied exist lots of rock types, such as clastic rocks, bioclastic limestone and volcaniclastic rock. The cumulative probability plots and sedimentary structures reflect that the transportation medium has characters of tractive current and gravity flow synchronously. The former has “high slopemultibouncing population1 suspension population” pattern, multisegments pattern and “high slope 1 segment” pattern. The latter has gutter cast, surface of scour, graded bed, massive bedding, hummocky cross stratification (HCS), parallel bedding, ripples, contemporaneous deformation and Fugichnia. The vertical sequence of the tempestites in the study area is Sa1graded bed segment, Sa2homogeneous bedding segment, Sbbiggish waveripple bedding segment, Scparallel bedding and HCS segment, Sdwavy bedding segment, Semudstone segment and Sfnatural lake facies clay rock segment upwards. There are four sedimentary models including autochthonous coarse grain rocks, near source tempestites A, near source tempestites B and distal tempestites .