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地球学报  2004 

峨眉地幔柱动力学数值模拟的初步研究

Keywords: 峨眉地幔柱,数值模拟,有限元

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Abstract:

在地幔柱的研究中,计算机数值模拟是一种常用的重要方法。地幔柱动力学定量模型主要由质量守恒方程、动量守恒方程和能量守恒方程组成,经计算模拟最终得到了温度场时空变化曲线。模拟结果表明:①峨眉地幔柱上升到地壳大约需要100×106a,而后在短期内喷发;②地幔柱演化过程中上升阶段和壳幔相互作用阶段所消耗的时间最长;③证明了地幔柱的脉动性,地幔柱的物质和能量是以脉动的形式向上传输的,同时也提供了板块运移的动力;④物质的粘度对于地幔柱的形成和发展起着重要作用;⑤地幔柱对地壳的重熔作用持续时间很长,这为大规模矿床的形成提供了时间条件。

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