Deep structure and geothermal resource effects of the Gonghe basin revealed by 3D magnetotelluric

IF 2.9 2区 地球科学 Q3 ENERGY & FUELS
Yi Yang, Jie Zhang, Xingchun Wang, Mingxing Liang, Dewei Li, Meng Liang, Yang Ou, Dingyu Jia, Xianchun Tang, Xufeng Li
{"title":"Deep structure and geothermal resource effects of the Gonghe basin revealed by 3D magnetotelluric","authors":"Yi Yang,&nbsp;Jie Zhang,&nbsp;Xingchun Wang,&nbsp;Mingxing Liang,&nbsp;Dewei Li,&nbsp;Meng Liang,&nbsp;Yang Ou,&nbsp;Dingyu Jia,&nbsp;Xianchun Tang,&nbsp;Xufeng Li","doi":"10.1186/s40517-024-00281-x","DOIUrl":null,"url":null,"abstract":"<div><p>In order to better understand the crustal shortening and orogenic uplift in the northeastern margin of the Tibetan Plateau, as well as the geothermal resource effects formed during this process, we used ModEM software to perform 3D MT imaging on broadband magnetotelluric survey points deployed at 710 points in the Gonghe Basin and its surrounding areas. The resistivity model suggests that the Gonghe Basin exhibits a low–high–low overall electrical structure, with high conductivity widely distributed in the middle and lower crust. The resistivity model also reveals a significant discontinuity between high and low resistivity blocks at various depths in the upper and middle crust. These discontinuities are align with the faults observed on the surface related to strong crustal fluctuations, which are connected to high conductors in the middle and upper crust. Using empirical formulas for high-temperature and high-pressure testing of granite, it is estimated that the melting volume of these high conductors ranges from 3 to 43%, demonstrating good \"plasticity\". These high conductors can act as detachment layers for crustal shortening and deformation during the expansion of the Tibetan Plateau towards the northeast edge and can continuously conduct heat energy upwards, creating a high thermal background in the Gonghe Basin.</p></div>","PeriodicalId":48643,"journal":{"name":"Geothermal Energy","volume":null,"pages":null},"PeriodicalIF":2.9000,"publicationDate":"2024-02-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://geothermal-energy-journal.springeropen.com/counter/pdf/10.1186/s40517-024-00281-x","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Geothermal Energy","FirstCategoryId":"89","ListUrlMain":"https://link.springer.com/article/10.1186/s40517-024-00281-x","RegionNum":2,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q3","JCRName":"ENERGY & FUELS","Score":null,"Total":0}
引用次数: 0

Abstract

In order to better understand the crustal shortening and orogenic uplift in the northeastern margin of the Tibetan Plateau, as well as the geothermal resource effects formed during this process, we used ModEM software to perform 3D MT imaging on broadband magnetotelluric survey points deployed at 710 points in the Gonghe Basin and its surrounding areas. The resistivity model suggests that the Gonghe Basin exhibits a low–high–low overall electrical structure, with high conductivity widely distributed in the middle and lower crust. The resistivity model also reveals a significant discontinuity between high and low resistivity blocks at various depths in the upper and middle crust. These discontinuities are align with the faults observed on the surface related to strong crustal fluctuations, which are connected to high conductors in the middle and upper crust. Using empirical formulas for high-temperature and high-pressure testing of granite, it is estimated that the melting volume of these high conductors ranges from 3 to 43%, demonstrating good "plasticity". These high conductors can act as detachment layers for crustal shortening and deformation during the expansion of the Tibetan Plateau towards the northeast edge and can continuously conduct heat energy upwards, creating a high thermal background in the Gonghe Basin.

三维磁层探测揭示共和盆地深部结构和地热资源效应
为了更好地了解青藏高原东北缘地壳缩短和造山运动隆升以及在此过程中形成的地热资源效应,我们利用ModEM软件对共和盆地及其周边地区布设的710个宽带磁电测点进行了三维MT成像。电阻率模型表明,共和盆地整体呈现低-高-低的电性结构,高导电率广泛分布于中下地壳。电阻率模型还显示,中上地壳不同深度的高电阻率区块和低电阻率区块之间存在明显的不连续性。这些不连续性与地表观测到的与强烈地壳波动有关的断层相一致,这些断层与中上层地壳的高导体相连。利用花岗岩高温高压测试的经验公式,估计这些高导体的熔化体积在 3% 至 43% 之间,显示出良好的 "可塑性"。在青藏高原向东北边缘扩张的过程中,这些高导体可作为地壳缩短和变形的脱离层,并可持续向上传导热能,在共和盆地形成高热背景。
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
Geothermal Energy Earth and Planetary Sciences-Geotechnical Engineering and Engineering Geology
CiteScore
5.90
自引率
7.10%
发文量
25
审稿时长
8 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.
×
引用
GB/T 7714-2015
复制
MLA
复制
APA
复制
导出至
BibTeX EndNote RefMan NoteFirst NoteExpress
×
提示
您的信息不完整,为了账户安全,请先补充。
现在去补充
×
提示
您因"违规操作"
具体请查看互助需知
我知道了
×
提示
确定
请完成安全验证×
copy
已复制链接
快去分享给好友吧!
我知道了
右上角分享
点击右上角分享
0
联系我们:info@booksci.cn Book学术提供免费学术资源搜索服务,方便国内外学者检索中英文文献。致力于提供最便捷和优质的服务体验。 Copyright © 2023 布克学术 All rights reserved.
京ICP备2023020795号-1
ghs 京公网安备 11010802042870号
Book学术文献互助
Book学术文献互助群
群 号:481959085
Book学术官方微信