Melt Extraction and Crustal Accretion at Mid-Ocean Ridges: Collaborative Study of the Mantle and Lower Crust in the Oman Ophiolite
Melt Extraction and Crustal Accretion at Mid-Ocean Ridges: Collaborative Study of the Mantle and Lower Crust in the Oman Ophiolite
批准号:
9416616
负责人:
Peter Kelemen
金额:
$31.47万
依托单位国家:
美国
项目类别:
Continuing Grant
财政年份:
1995
资助国家:
美国
项目状态:
已结题
起止时间:
1995-04-15 至 1999-09-30
中文摘要
小行星9416616 该项目计划调查地幔熔体抽取和下地壳岩浆侵位的机制。 这将通过在阿曼蛇绿岩中进行实地测绘和在那里收集样品,然后通过电子微探针和离子探针对样品进行实验室分析来完成。 这项工作很重要,因为在过去的几年里,我们对岩浆从地幔输送到岩浆房的看法发生了重大变化,我们对大洋中脊岩浆房的大小和形状的看法也发生了重大变化。 现在是时候通过在海洋地壳中暴露最好和保存最好的部分之一-阿曼蛇绿岩中寻找证据来评估这些新想法了。 ***
英文摘要
9416616 Kelemen This project plans to investigate the mechanisms of melt extraction from the mantle and the emplacement of magmas in the lower crust. This will be done by field mapping in the Oman ophiolate and collection of samples there, followed by laboratory analysis of samples by electron microprobe and ion probe. This work is important because in the past few years there has been a major change in how we think that magmas are transported from the mantle to magma chambers, and in our perception of the size and shape of magma chambers at mid-ocean ridges. It is time to evaluate these new ideas by looking for evidence in one of the best exposed and best preserved sections of ocean crust-Oman ophiolite. ***
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依托单位:
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财政年份:2004
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依托单位:
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海外基金