COLLABORATIVE RESEARCH: Tectonothermal Evolution during Collisional Orogenesis: Blueschist to Granulite facies Metamorphism in the Kigluaik Mountains, Alaska
COLLABORATIVE RESEARCH: Tectonothermal Evolution during Collisional Orogenesis: Blueschist to Granulite facies Metamorphism in the Kigluaik Mountains, Alaska
批准号:
9118394
负责人:
Brian Patrick
金额:
$0.0万
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:
1992-02-01 至 1995-01-31
中文摘要
阿拉斯加的Kigluaik山脉在相对凉爽、高压的绿帘蓝片岩上覆有麻粒岩相(高温)变质岩。对于这种并置,有两种相互竞争的假设:(1)它代表了一个伸展变质核杂岩,在不同等级的岩石之间有明显的构造断裂;(2)高温变质态形成于加厚地壳的热再平衡,没有构造断裂。这项研究将通过野外工作、岩石学和地质年代学的综合方案直接检验第二种假设。它还将评估高品位岩石的热传递机制。研究结果将为研究造山带深部碰撞后的热史提供重要的约束条件,具有广泛的构造意义。
英文摘要
The Kigluaik Mountains in Alaska contain a granulite facies (high-temperature) metamorphic overprint on relatively cool, high pressure, epidote-blueschist rocks. Two competing hypotheses for this juxtaposition are (1) that it represents an extensional metamorphic core complex with a pronounced structural break between the different grade rocks, and (2) that the high temperature meta- morphism formed in response to thermal re-equilibration of thickened crust with no structural break. This study will directly test the second hypothesis by an integrated program of field work, petrology and geochronology. It will also evaluate heat transport mechanisms for the high grade rocks. The results will provide important constraints on the thermal history of deep seated parts of orogens immediately post-collision, and will thus have wide tectonic significance.
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Thermomechanical Development of the Internal Zone and Linkage with the Fold and Thrust Belt, Central Brooks Range, Alaska
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批准号:9405560
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项目类别:Standard Grant
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资助金额:$19.55万
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财政年份:1994
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负责人:Brian Patrick
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依托单位:
Acquisition of a New Electron Microprobe
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批准号:9204792
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项目类别:Standard Grant
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资助金额:$32.0万
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财政年份:1992
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负责人:Brian Patrick
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依托单位:
Structural and Metamorphic Evolution of the Walker Lee Lake Arrigetch Peaks Region, Central Brooks Range, Alaska
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批准号:9196088
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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:1991
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负责人:Brian Patrick
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依托单位:
Structural and Metamorphic Evolution of the Walker Lee Lake Arrigetch Peaks Region, Central Brooks Range, Alaska
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批准号:9004270
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项目类别:Standard Grant
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资助金额:$2.22万
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财政年份:1990
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负责人:Brian Patrick
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依托单位:
Petrologic Transects Through the Western Alps
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批准号:8702688
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项目类别:Standard Grant
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资助金额:$3.12万
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财政年份:1987
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负责人:Brian Patrick
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依托单位:
国内基金
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