Architecture of the Oceanic Lighosphere in the Atlantic South of the Azores Hotspot

亚速尔群岛热点以南大西洋海洋大气层的结构

• 批准号: 9811924
• 负责人: Jian Lin
• 金额: $ 7.39万
• 依托单位: Woods Hole Oceanographic Institution
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 1998
• 资助国家: 美国
• 起止时间: 1998-10-01 至 2000-09-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9811924&HistoricalAwards=false
• 关键词: Architecture; Oceanic; Lighosphere; Atlantic; South

ABSTRACT The principal investigator will participate in a cruise of the French R/V Atalante to survey two areas of the MidAtlantic Ridge near the Azores hotspot. The survey will include the ridge axis and extend off axis to crustal ages of 10-13 million years and will collect fine-scale morphological and geophysical data. Questions to be addressed include: Is there a coherent, multi-segment, long-wavelength signal in crustal thickness variation associated with the Azores-ridge interaction? How does the degree of intrasegment asymmetries depend on the excess magma supply associated with the Azores hotspot? How does the episodicity of magmatic/amagmatic cycles depend on the excess magma supply?

摘要，首席研究人员将参加法国R/V Atalante的巡游，调查亚速尔群岛热点附近的中大西洋山脊的两个区域。 该调查将包括脊轴并将轴延伸至地壳年龄为100-1300万年，并将收集细小的形态学和地球物理数据。 要解决的问题包括：是否存在与Azores-Ridge相互作用相关的地壳厚度变化的连贯的多段，长波长信号？ 内段不对称程度如何取决于与亚速尔群岛热点相关的过量岩浆供应？ 岩浆/障碍周期的发作性如何取决于过量的岩浆供应？