SGER: Characterizing Carboniferous and Cretaceous Granites and their Sources in the Fosdick Mountains Gneiss Dome - A Pilot Study
SGER: Characterizing Carboniferous and Cretaceous Granites and their Sources in the Fosdick Mountains Gneiss Dome - A Pilot Study
批准号:
0734505
负责人:
Michael Brown
金额:
$2.29万
依托单位国家:
美国
项目类别:
Standard Grant
财政年份:
2007
资助国家:
美国
项目状态:
已结题
起止时间:
2007-07-15 至 2008-06-30
中文摘要
这项探索性研究的小额赠款调查了南极洲福斯迪克山脉花岗岩的起源。该项目将确定花岗岩来源,以描绘驱动区域熔融和穹隆的构造过程。这些过程包括俯冲、裂谷和岩浆作用的旋回,这些旋回是由与冈瓦那的演化和解体有关的构造事件驱动的。潜在的来源--古代沉积岩和年轻的深成岩体--将被描述出来,并与已知年龄的花岗岩进行比较。分析工作将包括主要元素和痕量元素分析;同位素地球化学;以及锆石的U-Pb定年。就更广泛的影响而言,该项目支持博士后研究员和本科生的研究。
英文摘要
This Small Grant for Exploratory Research investigates the origin of granites from the Fosdick Mountains, Antarctica. The project will determine the granite source to delineate tectonic processes that drove regional melting and doming. These processes include cycles of subduction, rifting, and magmatism driven by tectonic events related to the evolution and break-up of Gondwana. Potential sources--ancient sedimentary rocks and younger plutons--will be characterized and compared with granites of known age. Analytical work will include major and trace element analyses; isotope geochemistry; and U-Pb dating of zircon. In terms of broader impacts, this project supports research for a postdoctoral fellow and undergraduate student.
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