Early and Middle Proterozoic Crustal History, Borborema Province, Northeast Brazil
Early and Middle Proterozoic Crustal History, Borborema Province, Northeast Brazil
批准号:
9117594
负责人:
W. Randall Van Schmus
金额:
$10.0万
依托单位国家:
美国
项目类别:
Standard Grant
财政年份:
1992
资助国家:
美国
项目状态:
已结题
起止时间:
1992-01-01 至 1994-12-31
中文摘要
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英文摘要
The Borborema tectonic province in northern Brazil formed during the 600 Ma convergence of the West African, Amazonian and San Francisco-Congo cratons to form the ancient supercontinent of Gondwanaland. Because of the strong tectonic overprint at 600 Ma it has been difficult to identify pre-Gondwana tectonic boundaries within Borborema province. This study will provide U/Pb age determinations for key lithologic suites and magmatic events and, together with ongoing geologic mapping by Brazilian colleagues, will allow the tectonic boundaries to be delineated. The results will provide much improved understanding of the pre-600 Ma tectonic history and assembly of Gondwanaland, and will contribute to key concepts of continental growth during the Precambrian.//
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Collaborative Research: Post-Penokean Crustal Stabilization in the Lake Superior Region, North-Central United States
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批准号:9902762
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项目类别:Standard Grant
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资助金额:$11.35万
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财政年份:1999
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负责人:W. Randall Van Schmus
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依托单位:
Late Proterozoic Tectonic Development of Northeastern Brazil
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批准号:9614473
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项目类别:Standard Grant
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资助金额:$10.0万
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财政年份:1997
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负责人:W. Randall Van Schmus
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依托单位:
COLLABORATIVE RESEARCH: Geochronologic and Geologic Framework of Western Amazonia and Its Bearing on Possible Reconstructions with Laurentia-Baltica
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批准号:9705759
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项目类别:Standard Grant
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资助金额:$10.5万
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财政年份:1997
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负责人:W. Randall Van Schmus
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依托单位:
Collaborative Research: Evolution of Early Proterozoic Crust, Constraints from Xenoliths of the Navajo Volcanic Field
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批准号:9418578
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项目类别:Standard Grant
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资助金额:$5.0万
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财政年份:1994
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负责人:W. Randall Van Schmus
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依托单位:
Upgrading of Mass Spectrometer
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批准号:9404891
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项目类别:Standard Grant
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资助金额:$5.65万
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财政年份:1994
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负责人:W. Randall Van Schmus
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依托单位:
Assembly and Ancestry of Gondwana: Tectonic History of the Borborema Province, Northeast Brazil
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批准号:9316047
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项目类别:Continuing Grant
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资助金额:$17.25万
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财政年份:1994
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负责人:W. Randall Van Schmus
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依托单位:
Proterozoic Crustal Evolution, Midcontinent Region, USA
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批准号:9118515
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项目类别:Standard Grant
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资助金额:$5.18万
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财政年份:1992
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负责人:W. Randall Van Schmus
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依托单位:
Project Upper Crust
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批准号:8816260
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项目类别:Continuing Grant
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资助金额:$12.24万
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财政年份:1989
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负责人:W. Randall Van Schmus
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依托单位:
Acquisition of New Mass Spectrometer
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批准号:8517889
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项目类别:Standard Grant
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资助金额:$0.0万
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财政年份:1986
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负责人:W. Randall Van Schmus
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依托单位:
Geochronology of Early Proterozoic Orogenic Belts, Southern Churchill Province, Canadian Shield
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批准号:8313167
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项目类别:Continuing Grant
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资助金额:$26.53万
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财政年份:1984
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负责人:W. Randall Van Schmus
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依托单位:
Workshop on Geologic Evolution of the Brazilian Craton
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批准号:8405151
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项目类别:Standard Grant
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资助金额:$0.0万
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财政年份:1984
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负责人:W. Randall Van Schmus
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依托单位:
Geochronology and Geochemistry of Early Proterozoic Mobile Belts in North America
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批准号:8303110
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项目类别:Continuing Grant
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资助金额:$7.66万
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财政年份:1983
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负责人:W. Randall Van Schmus
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依托单位:
Geochronological and Geochemical Studies of Buried Precambrian Basement Rocks in the Continental Interior of North America
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批准号:8219137
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项目类别:Continuing grant
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资助金额:$0.0万
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财政年份:1983
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负责人:W. Randall Van Schmus
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依托单位:
Geochronologic Study of an Archean Continental Nucleus, Southern Cameroons, West-Central Africa
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批准号:8216554
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项目类别:Standard Grant
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资助金额:$0.0万
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财政年份:1983
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负责人:W. Randall Van Schmus
-
依托单位:
Geochronology and Geochemistry of Early Proterozoic Mobile Belts in North America
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批准号:8118234
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项目类别:Continuing grant
-
资助金额:$0.0万
-
财政年份:1982
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负责人:W. Randall Van Schmus
-
依托单位:
Geochronology and Geochemistry of Early Proterozoic Mobile Belts in North America
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批准号:7919544
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项目类别:Continuing grant
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资助金额:$0.0万
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财政年份:1980
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负责人:W. Randall Van Schmus
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依托单位:
Geology and Geochronology of Precambrian Rocks in the Great Lakes Area, North America
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批准号:7515007
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项目类别:Standard Grant
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资助金额:$0.0万
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财政年份:1975
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负责人:W. Randall Van Schmus
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依托单位:
Geochronology and Geology of Precambrian Rocks in Wisconsin And Upper Michigan
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批准号:7413361
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项目类别:Standard Grant
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资助金额:$0.0万
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财政年份:1900
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负责人:W. Randall Van Schmus
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依托单位:
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