Anisotropy of Magnetic Susceptibility of Welded Ignimbrites

磁化率各向异性(AMS)是一种潜在的强有力的岩石组构(首选颗粒取向)指标，但在火山学中尚未被充分利用。这项提案寻求的资金用于对焊接点火沸石中的AMS织物进行更详细的调查，而不是以前的研究尝试。将对非常仔细选择的地点进行采样，以评估焊接凝灰岩中AMS织物的来源和性质，绘制出数十至数百米尺度的主要流动方向，评估二次工艺(焊接和流变性)对这些主要织物的影响，并评估AMS可用于限制火山碎屑流沉积机制的程度。将对新墨西哥州杰梅兹山脉的班德利耶凝灰岩进行研究。

Anisotrophy of magnetic susceptibility (AMS) is a potentially powerful indicator of rock fabric (preferred grain orientation) that has not been fully exploited as a tool in volcanology. This proposal seeks funds for a much more detailed investigation of AMS fabrics in welded ignimbrites than has been attempted in previous studies. Very carefully selected sites will be sampled in order to evaluate the origin and nature of AMS fabrics in welded tuffs, to map out primary flow directions on the scale of tens to hundreds of meters, to assess the effect that secondary processes (welding and rheomorphism) have on these primary fabrics, and to assess the degree to which AMS can be used to constrain mechanisms of deposition from pyroclastic flows. The Bandelier Tuff, Jemez Mountains, New Mexico will be studied.