Collaborative Research: Origins of the Ontong Java Plateau,SW Pacific: A Geochemical and Stratigraphic Study of Exposed Plateau Basement in the Solomon Islands

翁东爪哇高原是世界上最大的海洋高原， 世界 私家侦探们建议对一个 取样和详细的岩相、化学、Nd-Sr-Pb 同位素和~（40）Ar-~（39）Ar研究 马莱塔岛暴露的高原基底带 在所罗门群岛。 为了补充这项工作， 还将研究一套熔岩（以前收集的 所罗门群岛地质调查局） 沿着马莱塔南部300公里长的区域暴露沿着， 邻近的小马莱塔岛和圣伊莎贝尔岛。 这些结果将扩展从钻井中获得的知识， 提供了一个深层的，地层控制的记录， 地幔源区、时代和岩石成因， 基底年龄和成分变化的覆盖范围 更广阔的区域。

The Ontong Java Plateau is the largest oceanic plateau in the world. The P.I.s propose to carry out systematic field sampling and a detailed petrographic, chemical, Nd-Sr-Pb isotopic, and 40Ar-39Ar investigation of a 2000 m-thick tract of plateau basement exposed on the island of Malaita in the Solomon Islands. To complement this work, the P.I.s will also study a suite of lavas (collected previously by the Solomon Islands Geological Survey) from other basement exposures along a 300-km-long zone in southern Malaita and the neighboring islands of Small Malaita and Santa Isabel. The results will extend knowledge gained from drilling by providing a deep, stratigraphically controlled record of mantle source, age, and petrogenesis, and a wide spatial coverage of basement age and compositional variations over a much broader region.