在失落的城市水热场的非生态碳化合物生产
Giora Proskurowski1, Marvin D Lilley, Jeffery S Seewald
1School of Oceanography, University of Washington, Seattle, WA 98195, USA. giora@whoi.edu
概括
通过Fischer-Tropsch类型 (FTT) 反应的碳化合物的非生物合成得到了来自Lost City水热场的新同位素数据的支持. 由地幔衍生的碳,而不是海水,很可能是这种天然碳化合物生产的燃料.
科学领域:
- 地质化学 地质化学
- 天体生物学 天体生物学
- 有机地化学 有机地化学
背景情况:
- 天然热水流体中的低分子量碳化合物通常归因于非生态的费舍尔-托普施反应 (FTT).
- 然而,对于自然环境中的FTT反应的确切证据很少.
研究的目的:
- 为了研究气丰富的液体中碳化合物的起源,在超级巨星主办的迷失城市热水场.
- 通过FTT反应提供支持或反对 abiogenic 碳化合物生产的证据.
主要方法:
- 在Lost City水热场的流体中分析碳化合物度,稳定性 (碳和) 和放射性碳同位素.
- 解释同位素数据以推断反应路径和碳来源.
主要成果:
- 观察到C1到C4碳化合物的稳定碳和同位素组成的明显反向趋势,与FTT起源一致.
- 放射性碳证据排除了海水二碳酸盐作为碳源,表明地幔衍生的无机碳源从宿主岩石中出.
结论:
- 通过FTT反应的碳化合物的非生物合成在自然环境中被证明是涉及超岩,水和温和的热量.
- 这一发现对理解地球和潜在的地球外环境中的碳化合物起源有重大意义.
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