Dispersed Volcanic Ash and Terrigenous Matter in Sediment from the Northwest Pacific

西北太平洋沉积物中分散的火山灰和陆源物质

• 批准号: 0958002
• 负责人: Andrew Kurtz
• 金额: $ 34万
• 依托单位: Trustees of Boston University
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2010
• 资助国家: 美国
• 起止时间: 2010-06-15 至 2015-05-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0958002&HistoricalAwards=false
• 关键词: Dispersed; Volcanic; Ash; Terrigenous; Matter

Pelagic and hemipelagic muds, which cover the floor of most of the world's oceans, have always been thought to be primarily of continental origin. We now know that undersea explosive volcanism is not as rare as we once thought and there is a distinct possibility that these muds may, in fact, have large volcanic ash components. This research unravels the origin of these muds and employs a novel, new, statistical approach to determine quantitatively the amount and origin/source of the volcanic ash component in them. The work is potentially transformative in terms of our understanding of seafloor sediments and could completely change how we characterize and understand deep sea sedimentation. It may also allow us to determine seafloor volcanic eruption ash-dispersal patterns and understand, for the first time, how important undersea volcanic eruptions are to the global seafloor sediment budget and geochemical cycling. Broader impacts of the work include support of a graduate student whose gender is under-represented in the sciences and undergraduates. The work is relevant to the NSF-funded MARGINS and Ocean Drilling Program missions and science plans. Resulting data will be publicly available through the NSF-funded SedDB data portal and data archive.

覆盖世界上大多数海洋的海底的远洋和半远洋泥浆一直被认为主要来自大陆。 我们现在知道，海底爆炸性火山活动并不像我们曾经想象的那么罕见，而且这些泥浆实际上很可能含有大量火山灰成分。 这项研究揭示了这些泥浆的起源，并采用了一种新颖的统计方法来定量确定其中火山灰成分的数量和起源/来源。 这项工作可能会改变我们对海底沉积物的理解，并可能完全改变我们对深海沉积的描述和理解。 它还可能使我们能够确定海底火山喷发的火山灰散布模式，并首次了解海底火山喷发对全球海底沉积物预算和地球化学循环的重要性。 这项工作的更广泛影响包括支持一名性别在科学和本科生中代表性不足的研究生。 这项工作与NSF资助的MARGINS和大洋钻探计划任务和科学计划有关。 由此产生的数据将通过NSF资助的SedDB数据门户和数据存档公开提供。