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 首席调查员将参加法国R/V Atalante号的巡航，调查亚速尔热点附近大西洋中脊的两个地区。 调查将包括海脊轴，并将轴外延伸至1 000万至1 300万年的地壳年龄，并将收集精细比例的形态和地球物理数据。 要解决的问题包括：是否有一个连贯的，多段，长波长的信号在地壳厚度变化与亚速尔海脊的相互作用？ 内部不对称的程度如何取决于与亚速尔热点有关的过量岩浆供应？ 岩浆/无岩浆旋回的幕式性如何取决于岩浆的过量供给？