深层地表微生物生活在撞击改变的晚期古老生代花岩岩石中,来自奇克苏鲁布撞击坑
Sohaib Naseer Quraish1, Charles Cockell2, Cornelia Wuchter1
1The Institute for Geoscience Research, WA-Organic and Isotope Geochemistry Centre (WA-OIGC), School of Earth and Planetary Sciences, Curtin University, Bentley, Western Australia, Australia.
Geobiology
|February 22, 2024
概括
奇克苏鲁布撞击坑是一个撞击坑.
科学领域:
- 天体生物学 天体生物学
- 地质微生物学的生物.
- 冲击石坑的形成
背景情况:
- 奇克苏鲁布撞击事件为研究深层生物圈的恢复创造了独特的环境.
- 之前的研究分析了撞击后的微生物群落,但花岩地下层仍然未被探索.
- 了解撞击结构中的微生物生命对于天体生物学和了解地球早期生命至关重要.
研究的目的:
- 调查奇克苏鲁布火山口撞击变形的花岩地下室中的微生物社区组成.
- 为了确定地化学边界和温度对火山口内深层生物圈的影响.
- 确定微生物和它们在撞击后生物地化学循环中的作用.
主要方法:
- 使用16S rRNA基因分析分析来自奇克苏鲁布火山口的花岩核心的45个岩石和矿物静脉样本.
- 研究的冲击冲击的花岩,非花岩 (苏维特,冲击融,巴萨尼特/多莱里特) 和矿物静脉.
- 斯皮尔曼相关性分析用于评估微生物群落,温度和地化学化合物之间的关系.
主要成果:
- 岩石地下室中的微生物群落在很大程度上与热水系统中的微生物群落相似.
- 钻孔温度显著影响了微生物群落的垂直分层.
- 在贫困的碎花岩和富含营养的非花岩中观察到不同的微生物群落.
- 微生物群落和可生物利用的化学物质之间强烈的相关性表明,有活性的化学和自营代谢.
- 在花岩地下室内存在隙分离的证据,由冲击诱导的地球化学边界形成.
结论:
- 撞击后微生物的分离在奇克苏鲁布火山口的花岩地下岩层中很明显.
- 撞击造成的地球化学边界继续塑造现代深层生物圈.
- 化学石化自营菌在地表深处的金属和硫循环中发挥着重要作用.
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