使用综合地质调查确定中生纪沉积物结构:在中国河北平原的一项案例研究
Yi Yang1,2, Jie Zhang1,2, Junjie Wu1,2
1Laboratory of Geophysical EM Probing Technologies, Ministry of Natural Resources, Dongli, Tianjin 300300, China.
Sensors (Basel, Switzerland)
|January 25, 2025
概括
地质物理调查揭示了中国北方平原的深层地质结构,克服了厚厚的沉积层的挑战. 这种综合方法增强了对构造运动和沉积物进化的理解.
科学领域:
- 地质物理学 地质物理学
- 构造学 构造学 构造学 构造学
- 沉积物学的沉积物学
背景情况:
- 北中国平原的厚厚的纪层阻碍了传统的地质勘探.
- 多个阶段的构造运动创造了复杂的地下浮雕和结构特征.
研究的目的:
- 为了划出台山前陆地区域的地下浮标和中纪的平层结构.
- 了解该地区的地质结构和沉积物演变.
- 证明综合地质物理方法在重度负担地区的有效性.
主要方法:
- 重力异常映射用于识别地下结构和断层.
- 磁 (MT) 声响以表征中生纪的地电层.
- 浅层的地震造型,以描绘结构风格,特别是在大兴升降机上.
- 井对地震校准,以将石质层学与地震接口相关联.
- 可变密度建模受到日志记录数据的约束,以改善接口反转.
主要成果:
- 详细地图地升起,陷和断层分布.
- 在中生代序列中,三层地电结构的表征.
- 精确确定基岩表面深度和中生代层次的细分.
- 鉴定古世和四世时期的底部接口波浪和地下结构风格.
结论:
- 综合地质物理方法有效地克服了厚厚的沉积层所带来的挑战.
- 这项研究为了解新构造运动和纪沉积物进化提供了关键数据.
- 以地质信息为指导的地质物理调查对于复杂,覆盖地形的地下勘探至关重要.
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