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

在巴布亚新几内亚的一个火山口侧面，PI拍摄到了一个巨大的海底流，它无法被识别。它的大小（~14 km3）强调了它在了解弧火山过程和地层记录方面的重要性。一些疏浚样本可以在理解这一特征方面有很长的路要走，PI将使用1.5天（加上1.5过境日）在R/V梅尔维尔从关岛到斐济的过境上进行4次疏浚运输和当地多波柱测深研究。这些样品将使PI能够确定流是如何形成的（即，是熔岩流、火山碎屑流、浮石/火山灰流、泥石流还是复合流）。他将对至少一个样品进行四次14C测年和Ra/Th测年。这项研究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。

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.