Kerogen in Archean rocks: Biotic vs abiotic signatures – Pt. II

太古代岩石中的干酪根：生物与非生物特征 â Pt。

• 批准号: 276836342
• 负责人: Professor Dr. Jan-Peter Duda
• 金额: --
• 依托单位: Abteilung Geobiologie
• 依托单位国家: 德国
• 项目类别: Priority Programmes
• 财政年份: 2015
• 资助国家: 德国
• 起止时间: 2014-12-31 至 2022-12-31
• 项目状态: 已结题
• 来源: https://gepris.dfg.de/gepris/projekt/276836342?language=en
• 关键词: Kerogen; Archean; rocks; Biotic; vs

The origin of organic matter in Archean rocks is ambiguous, as various sources come into question (biological vs abiotic). Available data suggest that most of the organic matter was indeed biologically produced, but has then been redistributed, and sequestered, into different environments by hydrothermal fluids. For testing this hypothesis, we will explore the presence and diversity of kerogens in Archean strata from the Pilbara Craton (Western Australia) and from the Barberton Greenstone Belt (South Africa). We are going to tackle the origin of these kerogens by (i) assessing their distribution, bulk characteristics and molecular composition, (ii) elucidating the nature of specific kerogen-mineral associations, and (iii) evaluating the geological fate of biological- vs abiotic organic matter during experimental thermal maturation. By integrating the respective findings into a holistic model, we will draw sound conclusions on the nature and distribution of organic matter on the early Archean Earth.

太古代岩石中有机物质的起源是模糊的，因为各种来源（生物与非生物）受到质疑。现有数据表明，大多数有机物质确实是生物产生的，但随后被热液流体重新分配和隔离到不同的环境中。为了验证这一假设，我们将探讨的存在和多样性的太古代地层中的干酪根从皮尔巴拉盆地（西澳大利亚州）和巴伯顿绿岩带（南非）。我们将解决这些干酪根的起源，（i）评估其分布，散装特性和分子组成，（ii）阐明特定的干酪根矿物协会的性质，（iii）评估生物与非生物有机质在实验热成熟的地质命运。通过将各自的发现整合到一个整体模型中，我们将得出关于太古代早期地球上有机物质的性质和分布的合理结论。