| 孟子龙,柴泉,郭佳,魏芳,郭晓宁,刘志彬,黄子莹.基于MT的冀中台陷（京南段）西部Ⅲ级构造单元界限研究[J].矿产勘查,2023,14(6):933-941 |
| 基于MT的冀中台陷（京南段）西部Ⅲ级构造单元界限研究 |
| Research on the boundary of tertiary tectonic units in the west of central Hebei depression （South Beijing section） based on magnetotelluric sounding |
| 投稿时间：2022-07-06 修订日期：2023-05-26 |
| DOI：10.20008/j.kckc.202306011 |
| 中文关键词: 冀中台陷 大地电磁测深 构造单元界限 太行山山前断裂 |
| 英文关键词: Central Hebei depression magnetotelluric exploration tectonic unit boundary piedmont fault of Taihang Mountains |
| 基金项目:本文受河北省国土资源厅地质勘查专项资金项目“冀中台陷（京南段）地热资源勘查（冀自然资勘［2019］027号）”资助。 |
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| 中文摘要: |
| 太行山山前断裂是Ⅲ级构造单元太行山隆起与冀中台陷的边界，查明其具体位置对区域的深部热储调查评价具有重要意义。为此，本文在前期区域重力和航磁等物探工作的基础上开展大地电磁勘探工作。通过布设5条大地电磁剖面，实现了对Ⅲ级构造单元界限的详细勘探。通过对4000 m以浅地层进行反演解译，并结合区域重磁勘探成果及地质资料，确定了区域性断裂及其次生断裂的位置、产状、走向等，重新绘制了Ⅲ级构造单元界限。结果显示界限中段向东偏移2 km左右，南段和北段与原界限重合或小有差异。该结果与深地震反射剖面探测结果基本吻合。本文研究成果将对该区域地热勘探工作有一定的指导作用。 |
| 英文摘要: |
| The piedmont fault of Taihang Mountains， a Ⅲ tectonic unit， is the boundary between the Taihang Mountain Uplift and the Central Hebei depression. It is of great significance for the investigation and evaluation of deep thermal reservoirs in the region to identify its specific location. Therefore， this article conducts magnetotelluric exploration work on the basis of previous regional gravity and aeromagnetic geophysical exploration work. By laying out five magnetotelluric profiles， the detailed exploration of the Ⅲ tectonic unit boundaries is realized. By inverting and interpreting the shallow strata of 4000 m， combined with regional gravity， aeromagnetic geophysical exploration results and geological data， its location， occurrence and strike of regional faults are determined， and the boundary is redrawn. The results show that the middle section of the boundary is offset by about 2 km to the east， and the original boundaries of the southern and northern sections coinside or have slight differences. This result is basically consistent with the deep seismic reflection profile detection results. And it will play a certain guiding role in the geothermal exploration work in this region. |
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