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

合作研究：西南太平洋翁通爪哇高原的起源：所罗门群岛裸露高原基底的地球化学和地层学研究

• 批准号: 9219664
• 负责人: John Mahoney
• 金额: $ 7.21万
• 依托单位: University of Hawaii
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 1993
• 资助国家: 美国
• 起止时间: 1993-02-01 至 1996-01-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9219664&HistoricalAwards=false
• 关键词: Collaborative; Research; Origins; Ontong; Java

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.

翁通爪哇高原是世界上最大的海洋高原。 P.I. 提议对所罗门群岛马莱塔岛暴露的 2000 米厚的高原基底进行系统的现场采样和详细的岩相、化学、Nd-Sr-Pb 同位素和 40Ar-39Ar 调查。 为了补充这项工作，PI 还将研究一组熔岩（之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 300 公里长的区域以及邻近的小马莱塔岛和圣伊莎贝尔岛的其他地下室暴露区域。 研究结果将提供地幔来源、年龄和岩石成因的深层地层控制记录，以及更广泛区域的基底年龄和成分变化的广泛空间覆盖，从而扩展从钻探中获得的知识。