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: 9302471
• 负责人: Clive Neal
• 金额: $ 5.3万
• 依托单位: University of Notre Dame
• 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: 1993-04-01 至 1995-09-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9302471&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.

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野外采样和详细的岩石学、化学、Nd锶-Pb同位素和40Ar-39Ar调查。为了补充这项工作，P.I.还将研究一组熔岩(所罗门群岛地质调查局之前收集的)，这些熔岩来自南部马拉伊塔岛及邻近的小马莱塔岛和圣伊莎贝尔岛上300公里长地带的其他地下室暴露。这些结果将通过提供地幔来源、年龄和岩石成因的深层、地层学控制的记录，以及更广泛区域内基底年龄和成分变化的广泛空间覆盖，来扩展从钻探中获得的知识。