COLLABORATIVE RESEARCH: Tectonothermal Evolution During Collisional Orogenesis: Blueschist to Granulite Facies Metamorphism in the Kigluaik Mountains, Alaska

合作研究：碰撞造山作用期间的构造热演化：阿拉斯加基格鲁艾克山脉的蓝片岩到麻粒岩相变质作用

• 批准号: 9118012
• 负责人: Bernard Evans
• 金额: $ 6.49万
• 依托单位: University of Washington
• 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
• 起止时间: 1992-02-01 至 1994-07-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9118012&HistoricalAwards=false
• 关键词: COLLABORATIVE; RESEARCH; Tectonothermal; Evolution; During

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.

阿拉斯加的Kigluaik山脉含有麻粒岩相 （高温）变质叠印上的温度相对较低， 高压绿帘石-蓝片岩 两个相互竞争的假设 这种并列是（1），它代表了一个延伸 变质核杂岩，具有明显的结构断裂， 不同级别岩石;（2）高温Meta作用， 态射形成的热再平衡的反应 地壳增厚，无结构断裂。 这项研究将直接 通过一个综合的实地工作计划来检验第二个假设， 岩石学和年代学。 它还将评估热传输 高品位岩石的机制。 结果将提供 对深埋部件热历史的重要约束 碰撞后的造山带， 构造意义