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The Geology of Donegal: A Geochronological Study of Granite Emplacement and Unroofing (Insights Into Terminal Orogenesis)

The Geology of Donegal: A Geochronological Study of Granite Emplacement and Unroofing (Insights Into Terminal Orogenesis)
多尼戈尔的地质：花岗岩就位和屋顶脱落的年代学研究（末期造山作用的见解）
批准号：
0125899
负责人：
Samuel Bowring
金额：
$11.39万
依托单位：
Massachusetts Institute of Technology
依托单位国家：
美国
项目类别：
Standard Grant
财政年份：
2002
资助国家：
美国
项目状态：
已结题
起止时间：
2002-02-01 至 2005-01-31
来源：
https://www.nsf.gov/awardsearch/showAward?AWD_ID=0125899&HistoricalAwards=false
关键词：
GeologyDonegalGeochronologicalStudyGranite

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中文摘要
翻译
许多山带以晚期正断层和双峰式岩浆活动为特征，两者都被认为是造山塌陷的反映。本提案将针对此类活动的一个典型例子，即爱尔兰北方的多尼加尔花岗质岩套，收集一套被认为与深成岩作用有关的剪切带中火成岩和组构形成矿物的高质量放射性年龄。深成岩的年龄与主要剪切带的活动年龄相结合，将为评估产生晚期活动的各种机制提供关键数据。
英文摘要
Many mountain belts are characterized by late stage normal faults and bimodal igneous activity, both considered to be reflective of orogenic collapse. This proposal will address a classic example of such activity, the Donegal granitic suite of northern Ireland by collecting a suite of very high quality radiometric ages on igneous rocks and fabric-forming minerals in shear zones believed to related to plutonism. The ages of plutonic rocks coupled with ages of activity on major shear zones will provide critical data needed to evaluate various mechanisms which produced the late stage activity.
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