A Two-Ship Multichannel Seismic Investigation of the East Pacific Rise South of the Garret Fracture Zone
A Two-Ship Multichannel Seismic Investigation of the East Pacific Rise South of the Garret Fracture Zone
批准号:
9012781
负责人:
John Mutter
金额:
$103.37万
依托单位:
依托单位国家:
美国
项目类别:
Continuing Grant
财政年份:
1991
资助国家:
美国
项目状态:
已结题
起止时间:
1991-03-01 至 1995-02-28
中文摘要
这是一个由两艘船组成的多通道地震现场项目,将首次提供关于Garrett断裂带以南东太平洋隆起地壳结构的详细地球物理约束。将收集三种类型的数据:(1)沿东太平洋隆起的20条近距离、单船多通道地震反射剖面;(2)同一区域沿和平行于上升轴的25条双船扩展扩展剖面;(3)从加勒特断裂带到20.5S大重叠扩张中心沿东太平洋隆起700 km长的多通道地震反射剖面。这些数据将用于检验许多脊顶热模型预测的岩浆房大小对扩张速率的依赖性,检验地壳岩浆房与沿轴形态、分段和玄武岩地球化学变化之间的关系,并更好地解决包括莫霍和地震3层在内的海洋地壳一级地震结构,在地壳形成后的最初几十万年间发展起来的。加勒特断裂带以南的东太平洋隆起部分将成为RIDGE倡议的主要焦点。
英文摘要
This is a two-ship multichannel seismic field program that will provide the first detailed geophysical constraints on the crustal structure along the East Pacific Rise south of the Garrett fracture zone. Three types of data will be collected: (1) twenty closely-space, single-ship multichannel seismic reflection profiles along the East Pacific Rise; (2) twenty- five two-ship expanding spread profiles along and parallel to the rise axis in this same area; and (3) a 700-km-long multichanel seismic reflection profile along the East Pacific Rise from the Garrett fracture zone to the large overlapping spreading center at 20.5S. These data will be used to test the spreading rate dependence of magma chamber size predicted by many ridge crest thermal models, examine the relationship between crustal magma chambers and along-axis changes in morphology, segmentation and basalt geochemistry, and to resolve better how the first-order seismic structure of oceanic crust, including Moho and seismic layer 3, developed during the first few hundred thousand years after crustal formation. The section of the East Pacific Rise south of the Garrett fracture zone is to be a major focus of the RIDGE initiative.
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SGER: Expert Roundtable on Critical Research Priorities in Sustainable Development
-
批准号:0750789
-
项目类别:Standard Grant
-
资助金额:$6.0万
-
财政年份:2007
-
负责人:John Mutter
-
依托单位:
Workshop: 3-D Seismic Reflection Imaging: A New Opportunity for Marine Geoscience Research
-
批准号:0517854
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项目类别:Standard Grant
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资助金额:$0.0万
-
财政年份:2005
-
负责人:John Mutter
-
依托单位:
Collaborative Research:3-D/4-D Seismic Reflection Imaging of the Magmatic-Hydrothermal System at the East Pacific Rise RIDGE 2000 Integrated Study Site at 9 50' N
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批准号:0327872
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项目类别:Continuing Grant
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资助金额:$0.0万
-
财政年份:2003
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负责人:John Mutter
-
依托单位:
Collaborative Research: Test for a Chemical Component to the Uplift of Midplate Swells
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批准号:0096368
-
项目类别:Continuing Grant
-
资助金额:$0.0万
-
财政年份:2002
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负责人:John Mutter
-
依托单位:
Collaborative Research: Natural Seismicity Investigation of Active Continental Breakup in the Western Woodlark Basin
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批准号:0118568
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项目类别:Standard Grant
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资助金额:$19.08万
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财政年份:2001
-
负责人:John Mutter
-
依托单位:
Collaborative Research: Natural Seismicity Investigation of Active Continental Breakup in the Western Woodlark Basin
-
批准号:9730824
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项目类别:Continuing Grant
-
资助金额:$34.97万
-
财政年份:1999
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负责人:John Mutter
-
依托单位:
Acquisition of a Syntrack 480-24 Multichannel Seismic Imaging Capability for the R/V Ewing
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批准号:9724283
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项目类别:Standard Grant
-
资助金额:$180.0万
-
财政年份:1997
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负责人:John Mutter
-
依托单位:
Investigation of Volcanic Underplating in the Austral Islands
-
批准号:9417076
-
项目类别:Continuing Grant
-
资助金额:$88.75万
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财政年份:1996
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负责人:John Mutter
-
依托单位:
Analysis and Interpretation of Seismic Data from the Southern East Pacific Rise
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批准号:9403605
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项目类别:Continuing Grant
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资助金额:$15.0万
-
财政年份:1994
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负责人:John Mutter
-
依托单位:
Woodlark-D'Entrecasteaux Project: Deep Seismic Imaging and Seismotectonics of Extensional Processes in a Province of Active Rifting
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批准号:9012730
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项目类别:Continuing Grant
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资助金额:$107.27万
-
财政年份:1992
-
负责人:John Mutter
-
依托单位:
A Comparative Multichannel Seismic Investigation into the Structure of Two Polynesian Volcanic Chains: Marquesas and Societies
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批准号:8817804
-
项目类别:Continuing Grant
-
资助金额:$92.68万
-
财政年份:1991
-
负责人:John Mutter
-
依托单位:
Basin and Range Geoscientific Experiment (BARGE)
-
批准号:9019357
-
项目类别:Standard Grant
-
资助金额:$104.7万
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财政年份:1991
-
负责人:John Mutter
-
依托单位:
Origin of Dipping Reflectors within the Oceanic Crust of the North Atlantic
-
批准号:9000433
-
项目类别:Standard Grant
-
资助金额:$17.39万
-
财政年份:1990
-
负责人:John Mutter
-
依托单位:
Multichannel Seismic Study of the Deep Structure of a Cordilleran Orogen: The Southernmost Andes
-
批准号:8717627
-
项目类别:Continuing grant
-
资助金额:$0.0万
-
财政年份:1987
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负责人:John Mutter
-
依托单位:
A Multichannel Seismic Investigation of the EPR at 9'N and 13'N
-
批准号:8701028
-
项目类别:Continuing grant
-
资助金额:$0.0万
-
财政年份:1987
-
负责人:John Mutter
-
依托单位:
Conjugate Margin Study Into Deep Crustal Structure Off Norway and East Greenland
-
批准号:8611825
-
项目类别:Standard Grant
-
资助金额:$13.99万
-
财政年份:1986
-
负责人:John Mutter
-
依托单位:
Deep Crustal Refraction Studies of the N.W. Australian Continental Margin
-
批准号:8410130
-
项目类别:Continuing grant
-
资助金额:$0.0万
-
财政年份:1986
-
负责人:John Mutter
-
依托单位:
A Multichannel Seismic Reflection Study of DSDP Site 504B
-
批准号:8411980
-
项目类别:Standard Grant
-
资助金额:$0.0万
-
财政年份:1985
-
负责人:John Mutter
-
依托单位:
Geophysical Investigation of Axial Magma Chambers on the East Pacific Rise: Multichannel Seismic Analyses
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批准号:8315466
-
项目类别:Continuing grant
-
资助金额:$0.0万
-
财政年份:1985
-
负责人:John Mutter
-
依托单位:
Geophysical Investigation of the Conjugate Passive Margins of the Norwegian-Greenland Sea
-
批准号:8216014
-
项目类别:Continuing grant
-
资助金额:$71.37万
-
财政年份:1983
-
负责人:John Mutter
-
依托单位:
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