A Detailed Study of Magma Mixing at Chaos Crags, Lassen Volcanic Center, CA

9303791戴维森二十年来的高精度批量地球化学分析，虽然扩大了我们对贡献组分作用的总体理解，但未能为汇聚边缘的岩浆成因提供完整的模式。在岩浆室过程能够被识别、理解和量化之前，宏大的统一假说将继续是循环辩论的主题。我们提出了一种不同的方法。拉森火山国家公园的混沌岩长期以来一直被认为是岩浆混合的经典结果(Heiken和Eichelberger，1980)。通过在相互作用的长度尺度上进行采样(mm-cm；而不是手工样品)，我们的目标是实现对混合过程的定量了解，其对整体化学的影响，以及其对喀斯喀特山脉最南端火山建筑物持续演化的总体重要性。

9303791 Davidson Twenty years of high precision bulk geochemical analyses, while broadening our overall understanding as to the role of contributing components, has failed to provide a complete model for magma genesis at convergent margins. Until magma chamber processes can be identified, understood and quantified, grand unifying hypotheses will continue to be the subject of circular debate. We propose a different approach. Chaos Crags in the Lassen Volcanic National Park has long been recognized as the classic result of magma mingling (Heiken and Eichelberger, 1980). By sampling at the length scales of interaction (mm-cm; rather than hand samples) we aim to achieve a quantitative understanding of the mingling process, its effects on bulk chemistry, and its overall importance to the sustained evolution of the southernmost volcanic edifice of the Cascade Range.