Cretaceous Volcanic Sequences and Jurassic(?) Crust in the Western Pacific: A Seismic Reflection Study

该项目是一个地质和实验室研究 历史，构造和结构的最古老的一部分， 太平洋海底。 中西部的实地项目 太平洋正在使用多通道地震技术， 确定地壳深层的深度和性质。 的 原始基岩与上覆层序的关系 白垩纪火山岩地层的问题正在解决。 的 白垩纪火山地层掩盖了深层 然而，以前的研究，这个项目将使用一个强大的 调谐震源阵列和96通道地震拖缆， 渗透到地下室 现代数据处理技术 将揭示出 瑙鲁、中太平洋和马里亚纳盆地。 的性质和 深水白垩纪火山复合体的范围和 与周围岛屿、环礁和平顶山的关系 将确定类似的年龄。 该研究为潜在的ODP提供了区域数据 在20世纪90年代初， 法国科学家的第二个实地项目 这两个项目 将满足钻井计划的所有要求， 具体的钻井地点。 T医生Shipley（德克萨斯大学）和R.拉尔森大学（罗德岛大学 岛）正在合作进行这项研究。 它们一起形成 非常强大的研究团队，拥有各方面的专业知识， 工作 这包括现场操作，地震数据分析 和区域地质解释。

This project is a field and laboratory study of the geologic history, tectonics and structure of the oldest part of the Pacific seafloor. The field program in the west central Pacific Ocean is using multichannel seismic techniques to determine the depth and nature of the deep crustal layers. The relationship of the original bedrock to an overlying sequence of Cretaceous volcanic strata is being resolved. The Cretaceous volcanic strata have masked the deep layers in previous studies, however, this project will use a powerful tuned source array and a 96-channel seismic streamer to penetrate to the basement. Modern data processing techniques will reveal the stratigraphic and structural relationships in the Nauru, Central-Pacific and Mariana Basins. The nature and extent of the deep-water Cretaceous volcanic complexes and the relationship to the surrounding island, atolls and guyots of similar age will be determined. The study is providing regional data for a potential ODP drilling leg in the early 1990's and is being coordinated with a second field program by French scientists. The two projects will meet all requirements for the drilling program to evaluate specific drilling locations. Dr. T. Shipley (Univ. Texas) and Dr. R. Larson (Univ. Rhode Island) are collaborating on this study. Together they form a very strong research team with expertise in all aspects of the work. This includes field operations, seismic data analysis and regional geologic interpretations.