JASON/MEDEA and Alvin Investigation of the Uppermost Oceanic Crust at Hess Deep

JASON/MEDEA 和 Alvin 对赫斯深渊最上层洋壳的调查

• 批准号: 9633725
• 负责人: Jeffrey Karson
• 金额: $ 31.05万
• 依托单位: Duke University
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 1998
• 资助国家: 美国
• 起止时间: 1998-09-01 至 2001-08-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9633725&HistoricalAwards=false
• 关键词: JASON; MEDEA; Alvin; Investigation; Uppermost

9633725 Karson Most of the ocean crust forms by the eruption of lavas on the sea floor and the injection of lava into existing crust. We can not observe this process, but we can study the rocks affected by this process in ophiolites, in drill holes into the ocean crust, and in faulted sections of ocean crust. The Hess Deep, in the eastern equatorial Pacific Ocean, is the best example of the last type of locality for fast spreading ocean ridges. Two separate teams of scientists have examined this section of ocean crust, but they interpreted the observations quite differently. The proponenets wish to examine a broad section of the Hess Deep crust to determine if it forms by episodes of crustal growth followed by periods of faulting.

9633725卡森大多数大洋地壳是由海底熔岩喷发和熔岩注入现有地壳形成的。我们无法观察到这一过程，但我们可以研究蛇绿岩中受这一过程影响的岩石，在大洋地壳的钻孔中，以及在大洋地壳的断层部分。位于赤道太平洋东部的赫斯深渊是最后一种快速扩张洋脊的最好例子。两个不同的科学家团队研究了这部分洋壳，但他们对观察结果的解释截然不同。提出者希望研究赫斯深部地壳的一大片区域，以确定它是否是由地壳生长时期和随后的断层时期形成的。