New estimates of carbonate and silicate weathering fluxes and associated with co _ ( 2 ) consumption budget were given in the major drainage basins of china where previous information was indeed limited . an attempt was also made to calculate chemical weathering rates of silicates and carbonates per unit area 中国主要流域盆地岩石化学风化的年均大气co :消耗量1375 . 91x109mol (占世界岩石风化年均消耗co :总量的6 . 55 % ) 、转移的碳量为1 . 65又107t碳，其中碳酸盐和硅酸盐类化学风化消耗的大气co :量分别占85 %和15 % 。
