TURBITIDY CURRENT SEDIMENTS OF SHUANGQIAOSHAN GR- OUP IN MIDDLE PROTEROZOIC IN XIUSHUI AREA,JIANGXI PROVINCE

This paper has discussed in detail the rock association, sedimentary tectonic and turbidite petrofacies and vertical evolutionary succession of Anlelin Formation and Formation and identified two more complete turbidite fans. The inter part of turbidite fan can be further divided into main channel, secondary channel and high-terrace of inter fan branching channel, flood land between channel and allogenic lobe of middle fan, and outer fan. It reflects a sedimentary cycle from progradation to retrogradation and reveals the changing trendency from regression of Anlelin Formation to progression of Formation.The systematic study of the structure, sequence and lateral variation of sandstone and conglomerate in the First Member of Formation varifies the characteristics of deep-water gravity current in the member,which can be regarded as main channel conglomerate of inter fan formed during the rapid descent of sea level. Anlelin Formation and Formation are continous sediments, and hence Xiushui Movement is believed to have not been in existence.