Regional estimation of Curie-point depths and succeeding geothermal parameters from recently acquired high-resolution aeromagnetic data of the entire Bida Basin, north-central Nigeria

Geothermal Energy Science Pub Date : 2017-03-24 DOI:10.5194/GTES-5-1-2017

L. Nwankwo, A. J. Sunday

{"title":"Regional estimation of Curie-point depths and succeeding geothermal parameters from recently acquired high-resolution aeromagnetic data of the entire Bida Basin, north-central Nigeria","authors":"L. Nwankwo, A. J. Sunday","doi":"10.5194/GTES-5-1-2017","DOIUrl":null,"url":null,"abstract":"Abstract. A regional estimation of Curie-point depths (CPDs) and succeeding geothermal gradients and subsurface crustal heat flow has been carried out from the spectral centroid analysis of the recently acquired high-resolution aeromagnetic (HRAM) data of the entire Bida Basin in north-central Nigeria. The HRAM data were divided into 28 overlapping blocks, and each block was analysed to obtain depths to the top, centroid, and bottom of the magnetic sources. The depth values were then used to assess the CPD, geothermal gradient, and subsurface crustal heat flow in the basin. The result shows that the CPD varies between 15.57 and 29.62 km with an average of 21.65 km, the geothermal gradient varies between 19.58 and 37.25 °C km−1 with an average of 27.25 °C km−1, and the crustal heat flow varies between 48.41 and 93.12 mW m−2 with an average of 68.80 mW m−2. Geodynamic processes are mainly controlled by the thermal structure of the Earth's crust; therefore this study is important for appraisal of the geo-processes, rheology, and understanding of the heat flow variations in the Bida Basin, north-central Nigeria.","PeriodicalId":31143,"journal":{"name":"Geothermal Energy Science","volume":"5 1","pages":"1-9"},"PeriodicalIF":0.0000,"publicationDate":"2017-03-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"18","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Geothermal Energy Science","FirstCategoryId":"1085","ListUrlMain":"https://doi.org/10.5194/GTES-5-1-2017","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"","JCRName":"","Score":null,"Total":0}

引用次数: 18

Abstract

Abstract. A regional estimation of Curie-point depths (CPDs) and succeeding geothermal gradients and subsurface crustal heat flow has been carried out from the spectral centroid analysis of the recently acquired high-resolution aeromagnetic (HRAM) data of the entire Bida Basin in north-central Nigeria. The HRAM data were divided into 28 overlapping blocks, and each block was analysed to obtain depths to the top, centroid, and bottom of the magnetic sources. The depth values were then used to assess the CPD, geothermal gradient, and subsurface crustal heat flow in the basin. The result shows that the CPD varies between 15.57 and 29.62 km with an average of 21.65 km, the geothermal gradient varies between 19.58 and 37.25 °C km−1 with an average of 27.25 °C km−1, and the crustal heat flow varies between 48.41 and 93.12 mW m−2 with an average of 68.80 mW m−2. Geodynamic processes are mainly controlled by the thermal structure of the Earth's crust; therefore this study is important for appraisal of the geo-processes, rheology, and understanding of the heat flow variations in the Bida Basin, north-central Nigeria.

查看原文本刊更多论文

根据最近获得的尼日利亚中北部整个比达盆地的高分辨率航磁数据对居里点深度和后续地热参数的区域估计

摘要根据最近获得的尼日利亚中北部整个比达盆地的高分辨率航磁（HRAM）数据的光谱质心分析，对居里点深度（CPD）、随后的地热梯度和地下地壳热流进行了区域估计。HRAM数据被划分为28个重叠区块，并对每个区块进行分析，以获得磁源顶部、质心和底部的深度。然后使用深度值来评估盆地中的CPD、地热梯度和地下地壳热流。结果表明，CPD在15.57和29.62之间变化 公里，平均21.65 公里，地热梯度在19.58和37.25之间变化 °C km−1，平均27.25 °C km−1，地壳热流在48.41和93.12之间变化 mW m−2，平均68.80 mW m−2.地球动力学过程主要受地壳的热结构控制；因此，本研究对于评估尼日利亚中北部比达盆地的地质过程、流变学和了解热流变化具有重要意义。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

求助全文

约1分钟内获得全文求助全文

来源期刊

Geothermal Energy Science

自引率

0.00%

发文量

审稿时长

39 weeks

期刊介绍： Geothermal Energy is a peer-reviewed fully open access journal published under the SpringerOpen brand. It focuses on fundamental and applied research needed to deploy technologies for developing and integrating geothermal energy as one key element in the future energy portfolio. Contributions include geological, geophysical, and geochemical studies; exploration of geothermal fields; reservoir characterization and modeling; development of productivity-enhancing methods; and approaches to achieve robust and economic plant operation. Geothermal Energy serves to examine the interaction of individual system components while taking the whole process into account, from the development of the reservoir to the economic provision of geothermal energy.