在带状铁构成中进行的苏盒子基质生成
1Department of Atmospheric and Oceanic Science, The University of Michigan, Ann Arbor 48109, USA.
Nature
|May 24, 1984
概括
带状铁层中的碳酸盐矿物质显示出异常的轻碳同位素 (12C) 丰富. 这表明有机碳的早期细菌氧化,在无氧环境中使用铁 (III) 作为电子受体.
科学领域:
- 地质化学 地质化学
- 古生物学的古生物学
- 沉积物学的沉积物学
背景情况:
- 带状铁构成 (BIF) 呈现出异常的碳同位素组成.
- 用轻碳同位素 (12C) 丰富是BIF碳酸盐矿物质中常见的观察结果.
研究的目的:
- 为观察到在BIF碳酸盐中的12C丰富提出一个diagenetic机制.
- 为了解释这些古老的沉积岩石中不寻常的同位素签名.
主要方法:
- 该研究采用基于微生物过程的地化学假设.
- 它根据同位素数据和已知的生物地化学反应推断出基因基因路径.
主要成果:
- 早期的同位素轻有机碳的二氧化氧化被认为是轻碳酸盐的来源.
- 铁 (III) 被认为是无氧环境中这种氧化过程的可能电子受体.
结论:
- 早期基因生成期间的细菌活动可以解释BIF碳酸盐中异常的12C丰富.
- 拟议的机制强调了微生物代谢和氧化还原化学在塑造沉积岩签名中的作用.
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