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成像了一条大量的海底流，该流在巴布亚新几内亚的一个小岛火山口的侧面违反了现成的识别。它的大小（〜14 km3）强调了其在理解弧形火山过程和地层记录中的重要性。一些挖泥机样本可以在理解此功能方面有很长的路要走，PI将在R/V Melville从关岛到斐济的过渡时间使用1.5天（加上1.5个过境天），以进行4次挖泥机和本地多层测深研究。样品将允许PI确定流动可能形成的方式（即，熔岩流量，浮雕低，浮石/灰落，碎屑流还是复合流动）。他将在至少一个样本上进行四个14C日期和RA/Th约会。该样本将涉及美国研究生和一位来自巴布亚新几内亚地质调查局的科学家。