A remote sensing approach to alteration mapping: AVIRIS data and extension-related potassium metasomatism, Socorro, New Mexico
A remote sensing approach to alteration mapping: AVIRIS data and extension-related potassium metasomatism, Socorro, New Mexico
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蚀变绘图的遥感方法：AVIRIS 数据和与延伸相关的钾交代作用，新墨西哥州索科罗
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发表时间：
1997
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通讯作者：
R. Blom
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作者：
K. Beratan;B. Peer;N. Dunbar;R. Blom
美国西南部中新世地壳伸展伴随着钾交代作用，这是一种以牺牲其他成分（特别是钠）为代价添加大量钾为特征的蚀变。导致钾蚀变的流体可能在引发伸展断层运动中起作用；确定这一点的一种方法是将蚀变的地理分布与断层和沉积相图进行比较。然而，尽管对岩石成分有很大的影响，但这种变化在视觉上是微妙的，很难在现场绘制。在本文中，我们提出了新墨西哥州索科罗附近的莱米塔尔山脉在里约热内卢大裂谷内的初步蚀变图。这张地图是根据机载可见光/红外成像光谱仪（AVIRIS）的数据绘制的。在Landsat Thematic Mapper卫星数据中区分钾交代的潜力是这项研究的部分动机，因为这些数据广泛可用。虽然钾含量…
Abstract Miocene crustal extension in the south-western United States was accompanied by potassium metasomatism, a type of alteration marked by addition of large amounts of potassium at the expense of other constituents, notably sodium. The fluids responsible for the potassic alteration may have played a role in triggering extensional fault motion; one way to determine this is to compare the geographic distribution of the alteration to fault and sedimentary facies maps. Despite the large impact on rock composition, however, the alteration is visually subtle and difficult to map in the field. In this paper we present a preliminary alteration map of the Lemitar Mountains near Socorro, New Mexico, within the Rio Grande rift. This map was created from Airborne Visible/Infrared Imaging Spectrometer (AVIRIS) data. The potential to discriminate potassium metasomatism in Landsat Thematic Mapper satellite data is part of the motivation for this study, since such data are widely available. Although the potassic min...