Magnetic-Structural and Tectonic Framework in the Genesis Process and Evolution of Relief in the Central portion of the Araucárias Plateau

IF 0.5 Q4 GEOGRAPHY, PHYSICAL

Revista Brasileira de Geomorfologia Pub Date : 2022-07-01 DOI:10.20502/rbg.v23i3.2128

Jacson Gosman Gomes de Lima, M. E. Pontelli, A. Santos-Matos, S. Guimarães

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引用次数: 0

Abstract

Abstract: The structural and tectonic influence on the relief of a region can be studied based on subsurface magnetic structures, especially those correlated to the basement (deep structures) and shallow structures linked to geomorphological context, faults/fractures, and drainage network. Aiming to understand the structural and tectonic influence on the relief of the Araucárias Plateau, airborne magnetic geophysical data was processed using Oasis Montaj software (Geosoft TM, 2004) and used to generate magnetic anomaly maps. Interpretations of the vertical derivative applied to the anomalous magnetic field enabled the identification of 49 magnetic lineaments. The characteristics of these lineaments allowed to divide the study area into three distinct geotectonic compartments that are in agreement with the structural blocks of the Paraná basin. The resultsshow that these magnetic lineaments mapped show directional agreement with shallow lineaments and, in many cases, constitute structures that extend from the basement to the surface. It was also possible to observe that the drainage network is adjusted to important mapped magnetic lineaments. This reinforces the importance of these structures in the genesis andevolution of the Araucárias Plateau. The analysis of magnetic lineaments, faults/fractures mapped, and geomorphological lineaments showed NW-SE orientations as the most important trend, suggesting that structures with this orientation exert the greatest influence on the relief in the study area.

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Araucárias高原中部地形成因、演化中的磁构造与构造格架

摘要：结构和构造对一个地区地形的影响可以基于地下磁结构来研究，特别是与基底（深层结构）和浅层结构相关的磁结构，这些结构与地貌背景、断层/裂缝和排水网络有关。为了了解结构和构造对Araucárias高原地形的影响，使用Oasis Montaj软件（Geosoft TM，2004）处理了航空磁地球物理数据，并用于生成磁异常图。对应用于异常磁场的垂直导数的解释使得能够识别49个磁线理。这些线性构造的特征使研究区域划分为三个不同的大地构造分区，这些分区与巴拉那盆地的构造块体一致。结果表明，绘制的这些磁性线理与浅层线理方向一致，在许多情况下，构成了从基底延伸到地表的结构。还可以观察到，排水网络已根据重要的已绘制磁线理进行了调整。这加强了这些结构在阿劳卡里亚斯高原的起源和演化中的重要性。对磁性线理、断层/断裂图和地貌线理的分析表明，NW-SE方向是最重要的趋势，表明具有该方向的构造对研究区的地形影响最大。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Revista Brasileira de Geomorfologia GEOGRAPHY, PHYSICAL-

CiteScore

1.30

自引率

40.00%

发文量

审稿时长

16 weeks

期刊介绍： The Revista Brasileira de Geomorfologia are focused on research, analysis and application of knowledge for the development of models of large sets of relief; fluvial dynamics; the processes of aspects, such as erosion and mass movements and their impact; survey, assessment and recovery of degraded areas; surveys and assessments of natural resources; thematic mapping and integrated relief; environmental zoning; among other relevant aspects of the land relief on any scale. From a technical and instrumental basis for the development of these studies, studies that use instruments to the survey, the interpretation and generalization of data on various aspects of the Earth''s surface, including the forms of occupation and use (s) company (s) human (s). As well as the use and integration of methods and techniques that enable geo technical and instrumental character important in scientific production and the definition of public policies.