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

安通爪哇高原是世界上最大的海洋高原。P.I.s计划对所罗门群岛马莱塔岛上一块2000米厚的高原基底进行系统的实地取样和详细的岩石学、化学、Nd-Sr-Pb同位素和40Ar-39Ar调查。为了补充这项工作，私家侦探还将研究一套熔岩（以前由所罗门群岛地质调查局收集），这些熔岩来自马莱塔南部以及邻近的小马莱塔岛和圣伊莎贝尔岛300公里长的区域内的其他地下室。通过提供地幔来源、年龄和岩石成因的深层、地层控制的记录，以及在更广泛的区域内对基底年龄和成分变化的广泛空间覆盖，这些结果将扩展从钻探中获得的知识。

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.