Anisotropy of Magnetic Susceptibility of Welded Ignimbrites

磁化率各向异性（AMS）是一种潜在的 岩石组构的有力指标（优选的晶粒取向） 作为火山学的工具还没有被充分利用。 这 该提案寻求资金进行更详细的调查， AMS织物在焊接熔结凝灰岩比已尝试在 以前的研究。 我们会仔细挑选一些地点， 为了评估AMS织物的来源和性质， 焊接凝灰岩，绘制出主要流动方向的规模 几十到几百米，以评估影响， 工艺（焊接和流变）对这些主要 织物，并评估AMS可用于 制约火山碎屑流沉积机制。 的 将研究新墨西哥州杰梅斯山的班德利尔凝灰岩。

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.