CHARACTERISTICS OF MODERN DEPOSIT OF THE TAIPINGKOU DOWNSTREAM. POINT BAR OF 1'HE JINGZHOU REACH YANGTZE RIVER

Along the south bank of the Yangtze river, between the Yuanshi bend and Shashi bend, there is a point bar which is named the Tai-Ping-Kou Downstream the Po-int Bar. Adjacent to it at the downstream, there is a channel bar(the Bar or Sanbatan), which is 7km in length and has an area of 7.5sq.km,Three-Eight with a nar-row fore and a wide tail, it appeares to be a planimetric form of wedge. A dinal ridge ranges all the way at both the fore and the tail.across the bar and there are some transversal longitu-furrows According to the 200m by 300m network, we have takes I05 samples on the surface of the bar sad dug 18 flutes(in depth of 1-2m).158 samples were used for the 19 for trace elements, 110 grain-size analysis, 6 for the clay mineral determination, for heavy minerals and 18 for the organic carbon dating.