A Seismic Refraction Investigation of Crustal Thickness Variations Between the Australian-Antarctic Discordance and Neighboring Southeast Indian Ridge

澳大利亚-南极不协调与邻近东南印度洋脊之间地壳厚度变化的地震折射研究

• 批准号: 9314315
• 负责人: Jason Phipps Morgan
• 金额: $ 42.33万
• 依托单位: University of California-San Diego Scripps Inst of Oceanography
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 1993
• 资助国家: 美国
• 起止时间: 1993-12-15 至 1995-11-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9314315&HistoricalAwards=false
• 关键词: Seismic; Refraction; Investigation; Crustal; Thickness

9314315 Phipps The Australian Antarctic Discordance is a section of mid ocean ridge that is significantly deeper than expected. This project will collect crustal thickness measurements from two neighboring segment in the Discordance has a median valley and a 1 km deeper axial depth than its neighboring Southeast Indian Ridge segment to the east that has an axial high morphology. Questions to be addressed are whether: (1) the Discordance is underlain by thin crust, (2) the Klein & Langmuir correlation of mid ocean ridge depth, crustal thickness, and major element chemistry is valid for the Discordance, (3) the crustal thickness on the adjacent Southeast Indian ridge differs from that in the Discordance, and (4) a magma lens exists under the Southeast Indian Ridge. ***

9314315 Phipps澳大利亚南极不一致是中海山脊的一部分，其比预期的要深得多。该项目将从不一度的两个相邻段收集地壳厚度测量值的中间山谷和比其附近的东南印度山脊段深1公里，其轴向高形态。要解决的问题是否是：（1）不一致的不一致，（2）中海山脊深度，地壳厚度和主要元素化学的Klein＆Langmuir相关性有效，（3）在印度山脉附近的印度山脊上的地壳厚度与印度山脉相邻的境内差异（4）杂志（4）A a杂志（4）A a），（4）a）。 ***