Investigating Palaeoclimate Using Spherules in the Geological Column

利用地质柱中的小球研究古气候

• 批准号: 2599355
• 金额: --
• 依托单位: Imperial College London
• 依托单位国家: 英国
• 项目类别: Studentship
• 财政年份: 2021
• 资助国家: 英国
• 起止时间: 2021 至 无数据
• 项目状态: 未结题
• 来源: https://gtr.ukri.org/projects?ref=studentship-2599355
• 关键词: Investigating; Palaeoclimate; Using; Spherules; Geological

The geological record holds a record of the past climate conditions on Earth. The evidence in the rocksprovides the only reliable baseline by which models of extreme climate behaviour can be tested. Without thisevidenceclimate models cannot be extrapolated far beyond modern datasets with confidence. There are many forms that climatic indicators take in the geological record, but mostare indirect measures, requiring complex models and extrapolations to provide reliable constraints for climate models. This project proposes a new and novel form of palaeoenvironment indicator that could revolutionise the way we examine the ancient past. Hidden within rocks are tiny spherules, tens to hundreds of microns in diameter, that have been the subject of little study before now. Some of these particles are extraterrestrial dust, which equilibrated with the atmosphere during flash heating during atmospheric entry, and provide a direct samples of atmospheric gas. Some are lightning strike particulates, and record the prevalence of extreme climate events. Others are the products of forest fires, produced by the fusion of mineral inclusions and air-borne dust trapped within plant material and record the global occurrence of natural fires, directly linked to climate.Some are volcanic in originandrecord the global activity of volcanoes, which in pre-industrial epochs were major forcesof the climate system.Unlike proximal volcanic deposits they are widely distributed.Finally, a small number of particles may also be the result of the impact of larger extraterrestrial object with the Earth, generating extreme short-period events effecting global climate. To date there have been no systematic studies of the chemical, mineralogical and isotopic properties of small spherules within sedimentary rocks. Our groups previous research has, however, shown they are abundant and recoverable. The objective of this researchis to produce the primary criteria by which these materials can be related to source, generating the primary reference for this new field of study.

地质记录记录了地球上过去气候条件的记录。 Rocksprove的证据证明了可以测试极端气候行为模型的唯一可靠基线。没有此视频气候模型，就无法充满信心地推断出远远超过现代数据集。气候指标在地质记录中有很多形式，但是大多数间接措施需要复杂的模型和外推才为气候模型提供可靠的约束。该项目提出了一种新的新型古环境指标，可以彻底改变我们研究古代过去的方式。隐藏在岩石中的是微小的球形，直径为数十至数百微米，这是几乎没有研究的主题。这些颗粒中的一些是外星灰尘，在大气进入过程中闪光加热过程中与大气相平衡，并提供了直接的大气气体样品。有些是闪电罢工的微粒，并记录极端气候事件的流行。其他是森林大火的产物，是由矿物包裹物和植物材料中的空气粉尘融合而产生的，并记录了与气候直接相关的全球发生的自然火灾。有些是火山的起源是火山的全球活动，这是世界的全球活动，这是火山的活动。在工业前时期，在气候系统中是主要力量。它们的近端火山沉积物被广泛分布。在本文中，少数颗粒也可能是地球上较大的外星物体影响的结果，产生了极端短期的事件影响全球气候。迄今为止，还没有对沉积岩中小球的化学，矿物学和同位素特性进行系统的研究。但是，我们的小组以前的研究表明它们是丰富且可回收的。这项研究的目的是产生这些材料可以与来源相关的主要标准，从而为这一新的研究领域产生主要参考。