Trace Element Response to Mantle Process: Application of Magma Migration

洋中脊微量元素分布的变化经常被用来约束诸如熔融源成分、熔融深度和程度以及源区大小和形状等参数。传统的微量元素模型假设了一些熔融过程的模型，一般来说，这些模型既不包括岩浆迁移的物理性质，也不包括微量元素的输运。本研究的目的是研究和量化可观测的微量元素在多大程度上对流动型等参数的变化、微量元素分布行为的敏感程度能够区分不同的潜在地幔过程。任意初始微量元素分布的行为可以用一系列物理上一致的模型来计算，这些模型控制着地幔中熔体和固体的流动。以下问题将是地址。微量元素的行为对流动状态、熔融程度、来源特征、孔隙/渗透率结构等参数的变化有多敏感？这些参数能否从地表观测到的微量元素分布中恢复出来？使用更传统的熔化模型恢复的参数有哪些误差？

Variations in trace element distributions at mid-ocean ridges have often been used to constrain parameters such as melting source compositions, depth and degree of melting, and size and shape of source regions. Traditional trace element models assume some model of the melting process that, in general, do not include either the physics of magma migration or trace element transport. The purpose of this research is to investigate and quantify to what degree observable trace elements to varying parameters such as flow regime, sensitive is the behavior of trace element distribution can distinguish between different potential mantel processes. The behavior of arbitrary initial trace element distributions can be calculated for a range of physically consistent models governing the flow of melt and solid in the mantle. The following questions will be addresses. How sensitive is the behavior of trace elements to varying parameters such as flow regime, degree of melting, source characteristics, porosity/permeability structure? Can these parameters be recovered from trace element distribution observed at the surface? What are the errors in the parameters recovered using more traditional melting models?