Genesis and Tectonic Significance of the Extension-Related Instrusive Complex of the Eldorado Mountains, Nevada

内华达州埃尔多拉多山脉与伸展有关的侵入杂岩的成因和构造意义

• 批准号: 9219860
• 负责人: Calvin Miller
• 金额: $ 6.96万
• 依托单位: Vanderbilt University
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 1993
• 资助国家: 美国
• 起止时间: 1993-01-01 至 1995-12-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9219860&HistoricalAwards=false
• 关键词: Genesis; Tectonic; Significance; Extension; Related

One of the remaining fundamental questions in extensional tectonics is the role of intrusive rocks which commonly are emplaced during extension. The Miocene intrusive complex of the Eldorado Mountains of southern Nevada was emplaced broadly synchronously with extreme crustal extension. It provides a unique opportunity to investigate the nature and genesis of granitic and more mafic magmas in extensional settings and the interplay between tectonism and igneous processes. This project will employ field, geochronologic, petrographic and barometric data to assess the role of the plutonic rocks in the tectonic and volcanic history of this region. Results should apply to the general questions of the relationship between pluton emplacement and extensional deformation, the chemical and mechanical effects of plutonism on the upper crust and the origin of petrochemical "fingerprints" of extensional igneous rocks.

伸展构造中剩余的基本问题之一是侵入岩的作用，这些侵入岩通常在伸展过程中侵位。内华达州南部埃尔多拉多山脉的中新世侵入杂岩与地壳极端伸展广泛同步侵位。它为研究伸展环境中花岗岩和更多的镁铁质岩浆的性质和成因以及构造作用和火成作用之间的相互作用提供了独特的机会。该项目将利用野外、地质年代学、岩石学和气压数据来评估深成岩在该地区构造和火山史中的作用。结果应适用于一般问题，如岩体侵位与伸展变形的关系，深成作用对上地壳的化学和力学效应，以及伸展火成岩的岩石化学“指纹”的来源。