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Origin of the Pacific-Antarctic EPR and of its Large-Scale Segmentation

Origin of the Pacific-Antarctic EPR and of its Large-Scale Segmentation
太平洋-南极洲EPR的起源及其大规模分割
批准号：
9314679
负责人：
Peter Lonsdale
金额：
$47.98万
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：
1994
资助国家：
美国
项目状态：
已结题
起止时间：
1994-01-01 至 1998-12-31
来源：
https://www.nsf.gov/awardsearch/showAward?AWD_ID=9314679&HistoricalAwards=false
关键词：
OriginPacificAntarcticEPRits

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中文摘要
翻译
朗斯代尔9314679在太平洋-南极东太平洋隆起的每个边缘进行的一对海洋地球物理调查将确定这个隆起是如何在新生代期间延长2,500公里的，以及它是如何产生重大偏移量的，从而定义了目前扩张中心的大规模分割。现有数据表明，隆升的增长是通过创建和捕获最高微板块、旧大洋岩石圈裂谷和三重结点的迁移来实现的，因此该项目将包括对这些过程的调查。主要的调查工具将是多波束声纳、磁强计和单通道地震剖面仪。
英文摘要
Lonsdale 9314679 A pair of marine geophysical surveys, on each margin of the Pacific-Antarctic East Pacific Rise, will establish how this rise lengthened by 2500 km during the Cenozoic, and how it produced major offsets which define the large-scale segmentation of the present spreading center. Existing data indicate that growth of the rise was by creation and capture of risecrest microplates, rifting of old oceanic lithosphere, and migration of triple junctions, so the project will include investigation of these processes. Principal survey tools will be a multibeam sonar, magnetometer, and single channel seismic profiler.
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