【摘要】 <正> 金华盆地位于浙江省中部,是浙江境内最大的内陆盆地——金衢盆地的一部分。但其本身仍是一封闭的向斜盆地。盆地南、北部边界主要为上侏罗统的火山碎屑岩构成的中低山;东西外延邻接鞋塘,白龙桥向斜。金华江横贯盆地中部,除沿金华江及主要支流乌义江等陆续有厚度小于10米的第四系松散层分布外,盆地内主要分布呈梳状丘岗的裸露红色碎屑岩。更多还原

【Abstract】 In this paper, data on ground water chemistry obtained from JINHUA red bed basin are analysed systematically by means of"Q" cluster analysis, trilinear hydrochemical diagram, and square diagram. Ground water in the red bed basin may fall into three categories; brackish water of S04-Na type, low-mineralized fresh water of HCO3 · SO4—Ca·Na·Mg types, and fresh water with complex hydrochemical constituents. The results of the study confirm the previous conclusion that three different subsystems of ground water in redbeds can be distinguished on the basis of their distribution and hydrodynamies. The isotopic characteristics of the groundwat-er have further elucidated that the three subsystems are quite different in hydrodynamics, hydrochemistry, and geologic age. The main recharge source of groundwater in the red bed is precipitation. The"R"cluster analysis indicates that the mineralization of the ground water in the red bed basin depends mainly on the contents of Na and SO4, which are its characteristic compositions. Finally, the origin and variation of the hydrochemical constituents in the groundwater are interpreted effectively by the diagram of hydrochemical evolution pattern.更多还原