黔中乌当盆地阶地沉积特征及其对盆地演化的指示

蒋玺, 陈文奇, 宁凡, 郑军, 罗维均, 周涌

Sediment characteristics of terraces in Wudang Basin and their implications on basin evolution

JIANG Xi, CHEN Wenqi, NING Fan, ZHENG Jun, LOU Weijun, ZHOU Yong

表3 阶地砾石层砾石形态和岩性

Tab. 3 Gravel shape and lithology of terrace gravel layers in Wudang Basin

沉积层 砾石形态百分比(%) 砾石岩性百分比(%) 棱角状 次棱角状 次圆状 圆状 极圆状 硅质岩 碳酸盐岩 砂岩 粉砂岩 泥质岩 LW-T1-1 29.36 26.61 44.04 21.10 55.04 16.51 6.42 0.92 LK-T2-1 18.75 19.64 55.36 6.25 21.43 43.75 34.82 LK-T2-3 39.84 48.43 11.72 8.59 47.65 3.13 9.38 31.25 YDX-T2-1 24.22 36.72 38.28 0.78 39.06 23.44 32.03 4.69 0.78 LW-T3 51.85 25.00 23.15 15.74 69.45 5.56 9.26 DW-T4-1 23.31 30.83 40.60 5.26 18.80 74.44 6.02 0.74 DW-T4-2 16.36 44.55 38.18 0.91 9.09 90.91 DW-T4-3 17.54 29.83 44.74 7.89 14.91 77.20 7.89