Collaborative Research: Chemical Geodynamics of the Galapagos Mantle Plume-Spreading Center System

合作研究：加拉帕戈斯地幔柱扩散中心系统的化学地球动力学

• 批准号: 0241546
• 负责人: Barry Hanan
• 金额: $ 12.04万
• 依托单位: San Diego State University Foundation
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2003
• 资助国家: 美国
• 起止时间: 2003-04-01 至 2007-03-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0241546&HistoricalAwards=false
• 关键词: Collaborative; Research; Chemical; Geodynamics; Galapagos

This is a collaborative study with German scientists from GEOMAR, as part of the MEGAPRINT expedition that took place aboard the R/V Sonne during 2001. The field program sampled critical, unmapped sections of the eastern Galapagos Spreading Center (GSC) and portions of young seafloor between the archipelago and the spreading center. Elements of the program included multi-beam seafloor mapping, shipboard gravity and magnetic surveys, and sampling of lavas by dredging at ~15 km spacing along the eastern GSC, and at numerous off-axis seamounts and volcanic ridges. Guided by ~100 major element glass analyses already completed, the PIs propose an analytical program that will determine trace element contents, He, Pb, Nd, Sr and Hf isotope compositions, volatile (CO2 ,H2O, Cl, F and S) contents and 40Ar-39Ar radiometric ages of a representative suite of these submarine glasses and rocks. Geophysical data from German colleagues will provide additional constraints on age, structure, thickness and tectonics of the crust and lithosphere.

这是一项与来自Geomar的德国科学家的合作研究，作为2001年R/V Sonne上的Megaprint Expedition的一部分。现场计划对东加拉帕戈斯传播中心（GSC）的关键，未覆盖的阶层进行了对群岛和扩展中心之间的年轻Seafloor的一部分。该程序的元素包括多光束的海底映射，船上重力和磁性调查，以及沿东部GSC的约15 km间距挖出熔岩，以及在众多的离轴封口和火山脊上。 PIS在〜100个主要元素玻璃分析的指导下，PIS提出了一个分析程序，该程序将确定痕量元素内容，HE，PB，ND，SR和HF同位素组成，挥发性（CO2，H2O，CL，F，F和S）和40AR-39AR辐射量表，这些代表性的透明剂玻璃的代表性镜头和Rocks和Rocks和Rocks和Rockss和Rocks和Rocks和Rockss和Rockss的辐射。来自德国同事的地球物理数据将对地壳和岩石圈的年龄，结构，厚度和构造学提供其他限制。