MORB Petrogenesis and Crustal Development on the East Pacific Rise from 8 - 10 Degrees N

东太平洋从北纬 8 度上升到 10 度的 MORB 岩石成因和地壳发育

• 批准号: 0138088
• 负责人: Michael Perfit
• 金额: --
• 依托单位: University of Florida
• 依托单位国家: 美国
• 项目类别: Continuing grant
• 财政年份: 2002
• 资助国家: 美国
• 起止时间: 2002-03-01 至 2007-01-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0138088&HistoricalAwards=false
• 关键词: MORB; Petrogenesis; Crustal; Development; East

This proposal outlines a two-year course of study to fully analyze and synthesize petrologic and geochemical data together with geologic and geophysical constraints to come up with fully integrated models of melting, melt ascent, plumbing and eruptive systems at the fast-spreading EPR 8 degrees -10 degrees N. The PI will collaborate with geologists and geophysicists at IPGP in Paris and WHOI. Distinct goals include using existing and new analyses to understand the mantle sources, melting, and fractionation of the axial and off-axis basalts, using gabbroic xenoliths, U-series dating, and geologic information to paint a picture of layer 2a thickening and the role of off-axis eruptions, and to evaluate the correlations between U-series ages, magnetic paleointensity values, and volcanic and geomorphic features. This ABR will bring together a decade of sampling and analytical work to produce a fully integrated interpretive model of crustal growth and evolution at fast spreading rates.

该提案概述了一个为期两年的研究过程，以充分分析和综合岩石学和地球化学数据以及地质和地球物理约束，提出在快速扩展的EPR 8度-10度N的熔化，熔体上升，管道和喷发系统的完全集成模型。PI将与巴黎IPGP和WHOI的地质学家和地球物理学家合作。不同的目标包括使用现有的和新的分析，以了解地幔来源，熔融，和轴向和离轴玄武岩的分馏，使用辉长岩捕虏体，U系列测年，地质信息描绘的图片层2a增厚和离轴喷发的作用，并评估U系列年龄，磁古强度值，火山和地貌特征之间的相关性。这个ABR将汇集十年的采样和分析工作，以产生一个完全综合的解释模型的地壳生长和演变在快速扩展的速度。