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HCO_3~-的浓度和溶解无机碳的δ~(13)C值是沿着阿奎亚含水层的水力坡降而变化的。在地层出露区,有土壤气体CO_2(δ~(13)C≈-26/ml)存在时,雨水补给使碳酸质介壳溶解得更快.(δ~(13)C≈0.0/ml)在这些地区内,HCO_3~-浓度一般为150～200m g/J,溶解HCO_3~-的δ~(13)C值接近-13/ml。随着水流远离露头区,HCO_3~-的浓度逐渐降低(约130mg/l),而δ~(13)C值则稍有增加(约-11.4/ml)。这种趋势影响亚稳态碳酸质介壳物质的进一步溶解和次生方解石胶结物的再次沉淀.水流系统中,下降坡度约40哩时.HCO_3~-浓度急剧增加(约为400mg/l),δ~(13)C值大大加重(约为δ~(13)C≈-6.2/ml),在这一坡降水流内,所观测到的Na~+与HCO_3~-的克分子比表明:同位素重碳酸介壳物质的溶解本身不能说明所观测到的δ~(13)C的趋势,更确切地说,Na~+:HCO_3~-的比率表明介壳物质的溶解作用必须在CO_2的参与下进行.由于这一地区内的合水层既与土壤气体也与大气的CO_2隔离.所以同位素的重CO_2(δ~(13)C≈-5.3/ml)明显地来源于含水层自身.含水层中CO_2的生成可能来自褐煤含水层物质的细菌媒介发酵和细菌煤介甲烷的成因。
The concentration of HCO_3 ~ and the δ ~ (13) C value of dissolved inorganic carbon change along the hydraulic gradient of Aquino aquifer. In the outcropping area of the strata, the recharge of carbonate makes the dissolution of carbonates faster with the presence of CO_2 (δ ~ (13) C≈-26 / ml) (δ ~ (13) C≈0.0 / ml) In these areas, the concentration of HCO 3 - is generally 150-200 m g / J and the δ 13 C value of dissolved HCO 3 - is close to -13 / ml. As water flow moved away from the outcrop, the concentration of HCO 3 - gradually decreased (about 130 mg / l) and the δ 13 C slightly increased (about -11.4 / ml). This trend affects the further dissolution of metastable carbonate matrix material and the re-precipitation of secondary calcite cement.When the descending gradient is about 40 mph, the concentration of HCO 3 ~ (- 400 mg / l) increases sharply (about 400 mg / l) (13) C≈-6.2 / ml), the observed molar ratios of Na ~ + to HCO_3 ~ in this slope precipitation current indicate that isotopes The dissolution of bicarbonate shell material does not tell the trend of δ 13 C observed. More specifically, the ratio of Na ~ +: HCO_3 ~ - indicates that the dissolution of shell material must be carried out with CO_2. Since the co-aquifer in this area is not only separated from the soil gas but also with the atmospheric CO 2, the heavy CO 2 (δ ~ (13) C≈-5.3 / ml) of the isotope clearly originates from the aquifer itself. The genesis of bacterial coal-based fermentation and bacterial coal-derived methane, which may be derived from lignite aquifer substances,