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首页> 外文学位 >Geophysical model of the Cu-Mo porphyry ore deposit at Copper Flat Mine, Hillsboro, Sierra County, New Mexico.
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Geophysical model of the Cu-Mo porphyry ore deposit at Copper Flat Mine, Hillsboro, Sierra County, New Mexico.

机译：新墨西哥州塞拉县希尔斯伯勒的铜扁平矿的铜钼斑岩矿床的地球物理模型。

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摘要

A 3D gravity model of the Copper Flat Mine was performed as part of the exploration of new resources in at the mine. The project is located in the Las Animas Mining District in Sierra County, New Mexico. The mine has been producing ore since 1877 and is currently owned by the New Mexico Copper Corporation, which plans o bringing the closed copper mine back into production with innovation and a sustainable approach to mining development. The Project is located on the Eastern side of the Arizona-Sonora-New Mexico porphyry copper Belt of Cretaceous age. Copper Flat is predominantly a Cretaceous age stratovolcano composed mostly of quartz monzonite. The quartz monzonite was intruded by a block of andesite alter which a series of latite dikes creating veining along the topography where the majority of the deposit. The Copper Flat deposit is mineralized along a breccia pipe where the breccia is the result of auto-brecciation due to the pore pressure. There have been a number of geophysical studies conducted at the site. The most recent survey was a gravity profile on the area. The purpose of the new study is the reinterpretation of the IP Survey and emphasizes the practical use of the gravity geophysical method in evaluating the validity of the previous survey results. The primary method used to identify the deposit is gravity in which four Talwani models were created in order to created a 3D model of the ore body. The Talwani models have numerical integration approaches that were used to divide every model into polygons. The profiles were sectioned into polygons; each polygon was assigning a specific density depending on the body being drawn. Three different gridding techniques with three different filtering methods were used producing ten maps prior to the modeling, these maps were created to establish the best map to fit the models. The calculation of the polygons used an exact formula instead of the numerical integration of the profile made with a Talwani approach. A least squared comparison between the calculated and observed gravity is used to determine the best fitting gravity vectors and the best susceptibility for the assemblage of polygonal prisms. The survey is expected to identify the geophysical anomalies found at the Copper Flat deposit in order to identify the alteration that surrounds that part of the ore body. The understanding of the anomalies needs to be reevaluated in order to have a sharper model of Copper Flat, and to understand the relations of the different structures that shaped this copper porphyry deposit.
机译：在探矿新资源过程中，进行了铜扁平矿的3D重力模型。该项目位于新墨西哥州塞拉县的拉斯阿尼玛斯矿业区。该矿自1877年以来一直在生产矿石，目前由新墨西哥铜业公司（New Mexico Copper Corporation）拥有，该公司计划通过创新和可持续的矿业开发方法将封闭的铜矿重新投入生产。该项目位于白垩纪的亚利桑那-索诺拉-新墨西哥斑岩铜带的东侧。铜扁带主要是白垩纪的平流层火山，主要由石英蒙脱石组成。石英蒙脱石是由一块安山岩蚀变岩侵入的，其中一系列的红岩岩堤沿大部分沉积物的地形形成脉状。铜扁平沉积物沿角砾岩管矿化，其中角砾岩是由于孔隙压力而自缩水的结果。该地点已经进行了许多地球物理研究。最近的调查是该地区的重力剖面。这项新研究的目的是对IP调查进行重新解释，并强调重力地球物理方法在评估先前调查结果的有效性方面的实际应用。用于识别矿床的主要方法是重力，其中创建了四个Talwani模型以创建矿体的3D模型。 Talwani模型具有数值积分方法，用于将每个模型划分为多个多边形。剖面被切成多边形；每个多边形根据绘制的物体分配特定的密度。在建模之前，使用了三种具有三种不同过滤方法的不同网格技术，生成了十张地图，这些地图被创建以建立适合模型的最佳地图。多边形的计算使用精确的公式，而不是使用Talwani方法进行的轮廓的数值积分。计算得出的重力和观察到的重力之间的最小二乘比较可用于确定最佳拟合重力矢量和多棱镜组合的最佳磁化率。预计该调查将确定在铜扁平矿床发现的地球物理异常，以便确定围绕矿体该部分的蚀变。需要重新评估对异常的理解，以建立更清晰的铜扁平模型，并了解形成该铜斑岩矿床的不同结构之间的关系。

著录项

  • 作者

    Gutierrez, Adrian Emmanuel Gutierrez.;

  • 作者单位

    The University of Texas at El Paso.;

  • 授予单位 The University of Texas at El Paso.;
  • 学科 Geophysics.;Geology.;Engineering Mining.
  • 学位 M.S.
  • 年度 2014
  • 页码 103 p.
  • 总页数 103
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类 语言学;
  • 关键词

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