标题： 铀矿省拉戈阿雷亚尔（巴伊亚州）地下地质结构的地球物理航空数据表征进展 显示英文标题

标题： Avanços na caracterização das estruturas geológicas em subsuperfície da provincia uranífera lagoa real (ba) a partir de dados aerogeofísicos

摘要： 在本工作中，我们介绍了对巴伊亚州拉戈阿雷亚尔铀矿区航空磁测和伽马能谱数据的最新重新评估结果，这些数据是在圣蒂莫特奥项目下获取的。主要目的是通过对研究区域航空磁测和辐射数据的仔细分析，提供关于该地区构造单元的磁性和辐射特征的新见解。我们提供了数据处理中使用的校正和解释程序的详细信息。本工作的显著特点是合理使用了垂直导数、解析信号和欧拉反演等解释技术，从而在研究区域识别出大量线性构造和基底特征，这些在以前的研究中未被识别。其中突出的是北部地区的北西-南东走向线性构造，西中部地区的弧形特征以及拉戈阿雷亚尔矿区南部和西南部地区的圆形特征。有迹象表明，线性构造方向的变化与断裂带有关，这些断裂带与铀矿化过程有关。大多数具有磁性对比的体位于500米以浅，但也有一些体的深度延伸至1500米。结果还允许确定一些地质研究和之前航空磁测解释中未识别的构造特征。磁法和伽马能谱数据的联合解释使能够识别与局部交代作用相关的铀矿化带。我们得出结论，所得结果与地质研究推断的局部构造框架一致，但与早期研究的结果有显著不同。 显示英文摘要

摘要： In this work we present results of a recent re-evaluation of airborne magnetometric and gamma spectrometric data of the uranium province of Lagoa Real (BA), acquired under the project S\~ao Timoteo. The main purpose is to provide new insights into the magnetic and radiometric characteristics of the structural units in this region, derived from a careful analysis of the aeromagnetic and radiometric data of the study area. We provide details of the correction and interpretation procedures employed in data processing. A remarkable feature of the present work has been the judicious use of such interpretation techniques as the vertical derivative, analytic signal and Euler de-convolution, which have lead to identification of a large number of lineaments and basement features in the study area, not identified in previous studies. Prominent among these are the NW-SE trending lineaments in the northern parts, arc shaped features in the west-central parts and circular features in the south and south-western parts of the Lagoa Real province. There are indications that changes in direction of the lineaments are associated with fracture zones, associated with Uranium mineralization processes. Most of the bodies with magnetic contrasts are located at depths less than 500 meters, but there also a number of bodies at depths extending up to depths of 1500m. The results have also allowed determination of a number of structural features not identified in geologic studies as well as in previous interpretations of aeromagnetic data. Joint interpretation of magnetic and gamma spectrometric data have allowed identification of uranium mineralization zones, associated with local metasomatic processes. We conclude that the results obtained are in good agreement with the local structural framework inferred from geologic studies, but significantly different from those reported in earlier studies.