Dredging rocks from a large volcanic flow in the Bismarck volcanic arc, Papua New Guinea

疏浚巴布亚新几内亚俾斯麦火山弧大型火山流中的岩石

• 批准号: 0928374
• 负责人: Eli Silver
• 金额: $ 3.86万
• 依托单位: University of California-Santa Cruz
• 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: 2010-01-01 至 2011-12-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0928374&HistoricalAwards=false
• 关键词: Dredging; rocks; large; volcanic; flow

The PI has imaged a massive submarine flow that defies ready identification on the flanks of an island caldera in Papua New Guinea. Its size (~14 km3) underscores its importance in understanding arc volcanic processes and stratigraphic records. A few dredge samples could go a long way in understanding this feature, and the PI will use 1.5 days (plus 1.5 transit days) on a transit of the R/V Melville from Guam to Fiji to carry out 4 dredge hauls and local multibeam bathymetric study along this flow. The samples will allow the PI to determine how the flow might have formed (i.e., whether lava flow, pyroclastic low, pumice/ash fall, debris flow or a composite flow). He will carry out four 14C dates and Ra/Th dating on at least one these samples.The will involve both a US graduate student and a scientist from the Geological Survey of Papua New Guinea.

PI已经在巴布亚新几内亚的一个火山口岛的侧面拍摄到了一个巨大的海底水流，这个水流无法被轻易识别。它的大小（~14 km 3）强调了它在了解弧火山过程和地层记录方面的重要性。几个挖泥船样本可能有助于了解这一特征，PI将在R/V梅尔维尔号从关岛到斐济的运输中使用1.5天（加上1.5个运输日），以进行4次挖泥船拖运，并沿该水流沿着进行当地多波束测深研究。样本将允许PI确定流动可能是如何形成的（即，无论是熔岩流、火山碎屑流、浮石/火山灰流、泥石流还是复合流）。他将对其中至少一个样品进行四次14 C测年和Ra/Th测年。这将涉及一名美国研究生和一名来自巴布亚新几内亚地质调查局的科学家。