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根据水化学分析和稳定碳同位素的测试数据,本文计算了四川康定温泉热水和热储的CO_2含量和深源CO_2的释放量,探讨了热水中CO_2的成因。温泉热水中CO_2含量最高为1840.16 mg/L,平均为1060.53 mg/L,属于富含深源CO_2的温泉系统。热水和CO_2气的碳同位素揭示深源CO_2的成因为幔源和碳酸盐岩变质脱气以及两者的混合。康定12个温泉深源CO_2的排出量为1766.43 t/a,其中至少40％呈气相直接排入大气,其余进入水圈,证实我国西部众多温泉是深源CO_2释放的一种重要途径。
Based on the water chemistry analysis and the stable carbon isotope test data, the CO 2 content of hot and cold reservoirs and the release amount of CO 2 in Kangding Hot Spring in Sichuan Province are calculated, and the formation of CO 2 in hot water is discussed. Hot spring hot water CO 2 content of the highest 1840.16 mg / L, an average of 1060.53 mg / L, is rich in deep source CO_2 hot spring system. The carbon isotopes of hot water and CO_2 revealed that the origin of deep source CO_2 is metamorphic degassing of mantle source and carbonate rocks and the mixture of the two. The discharge of CO_2 from deep hot springs in Kangding was 1766.43 t / a, of which at least 40% was directly discharged into the atmosphere and the rest entered the hydrosphere, confirming that many hot springs in western China are an important way to release CO 2 from deep sources.