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首页> 外文期刊>Journal of Volcanology and Geothermal Research >The plumbing system of the Pagosa thermal Springs, Colorado: Application of geologically constrained geophysical inversion and data fusion
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The plumbing system of the Pagosa thermal Springs, Colorado: Application of geologically constrained geophysical inversion and data fusion

机译：科罗拉多州帕戈萨温泉的管道系统：地质约束地球物理反演和数据融合的应用

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摘要

Fault and fracture networks usually provide the plumbing for movement of hydrothermal fluids in geothermal fields. The Big Springs of Pagosa Springs in Colorado is known as the deepest geothermal hot springs in the world. However, little is known about the plumbing system of this hot spring, especially regarding the position of the reservoir (if any) or the position of the major tectonic faults controlling the flow of the thermal water in this area. The Mancos shale, a Cretaceous shale, dominates many of the surface expressions around the springs and impede an easy recognition of the fault network. We use three geophysical methods (DC resistivity, self-potential, and seismic) to image the faults in this area, most of which are not recognized in the geologic fault map of the region. Results from these surveys indicate that the hot Springs (the Big Spring and a warm spring located 1.8 km further south) are located at the intersection of the Victoire Fault, a major normal crustal fault, and two north-northeast trending faults (Fault A and B). Self-potential and DC resistivity tomographies can be combined and a set of joint attributes defined to determine the localization of the flow of hot water associated with the Eight Miles Mesa Fault, a second major tectonic feature responsible for the occurrence of warm springs further West and South from the Big Springs of Pagosa Springs. (C) 2015 Elsevier B.V. All rights reserved.
机译：断层和裂缝网络通常为地热田中热液的流动提供管道。科罗拉多州帕戈萨温泉的大温泉被称为世界上最深的地热温泉。但是，对该温泉的管道系统知之甚少，特别是关于储层（如果有的话）的位置或控制该区域热水的主要构造断层的位置知之甚少。 Mancos页岩是白垩纪页岩，在弹簧周围的许多表面表情中占主导地位，并阻碍了对断层网络的轻松识别。我们使用三种地球物理方法（直流电阻率，自电势和地震方法）对这一地区的断层进行成像，但大多数断层在该地区的地质断层图中都无法识别。这些调查的结果表明，温泉（大温泉和暖泉位于更南1.8公里处）位于维克多断层（一个主要的地壳断层）和两个东北偏北趋势断层（A断层和M断层）的相交处。 B）。可以将自电位层析成像和直流电阻层析成像结合起来，并定义一组联合属性，以确定与八英里台面断层有关的热水流的位置，八英里梅萨断层是第二个主要的构造特征，其作用是在西部和西部进一步出现暖泉。从帕戈萨斯普林斯的大泉南下。 （C）2015 Elsevier B.V.保留所有权利。

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