Origin, Deformation and Composition of Mesozoic Oceanic Crust Entering the Tonga-Kermadec Trench
Origin, Deformation and Composition of Mesozoic Oceanic Crust Entering the Tonga-Kermadec Trench
批准号:
9731045
负责人:
Peter Lonsdale
金额:
$32.45万
依托单位国家:
美国
项目类别:
Continuing Grant
财政年份:
1999
资助国家:
美国
项目状态:
已结题
起止时间:
1999-01-15 至 2001-12-31
中文摘要
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英文摘要
The proposed work will test the ideas about how oceanic lithosphere deforms as it enters the subduction zone and how its composition affects the magmatism of the adjacent volcanic arc. The investigators will undertake a magnetic and multibeam bathymetric survey and dredge rock samples from the outer bulge of Tonga-Kermadec Trench for geomorphological and geochemical analyses, respectively. This will allow them to sample young exposures of old oceanic crust rpoduced by faulting and study the sample young exposures of old oceanic crust produced by faulting and study the Mesozoic deformation. A 2000-km long and 80 km wide strip will be mapped by Seabeam 2000 and ca 20-30 dredge samples will be collected.
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批准号:0203636
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项目类别:Standard Grant
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批准号:0203348
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批准号:9314679
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Structural Geomorphology of the Pacific-Antarctic EPR
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批准号:8918898
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项目类别:Standard Grant
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Axial Volcanism in the Mariana Trough Back-Arc Basin
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依托单位:
海外基金