Scholarlink

<p>The Tu Chinh – Vung May (TC-VM) basin is one of the Cenozoic rift basins along the continental margin of Vietnam, formed during the tectonic evolution associated with the opening of the East Vietnam Sea (EVS). This paper addresses the scarcity of geophysical studies in the basin by using gravity anomalies to investigate its structural and tectonic characterization. Several edge enhancement techniques are estimated on a synthetic model before applying them to the Bouguer field of the basin. Bouguer data maps upward continued to different heights, and the corresponding results are also analyzed. Finally, the gravity inversion is used to map the Moho structure of the basin. The outcomes show that the enhanced horizontal gradient (EHG) filter yields sharper signals over the boundaries, and avoids bringing false edges; therefore, its outputs are used to establish a new subsurface structural map where many NNE-SSW, NE-SW, and N-S trending structures are recognized in the basin. The identified structural trends show a close correspondence with the orientations of the two major seafloor spreading stages of the EVS and may therefore reflect the influence of the regional tectonic regime associated with these spreading events. The inversion result shows that the Moho depth of the basin is approximately 9.7–22.4&#xa0;km with a mean depth of 17&#xa0;km, which is in agreement with the depth from seismic data. The findings demonstrate that the tectonic evolution of the TC-VM basin is closely tied to the broader geodynamic processes of the EVS, influenced by its sea-floor spreading and opening.</p>

错误：搜索内容不能为空，请输入英文关键词
错误：关键词超出字数限制，请精简
高级检索

Structural characterization of the Tu Chinh – Vung May basin from gravity data

  • 期刊论文

  • 发表日期：

    2026年2月12日

查看全文
  • Luan Thanh Pham

摘要

The Tu Chinh – Vung May (TC-VM) basin is one of the Cenozoic rift basins along the continental margin of Vietnam, formed during the tectonic evolution associated with the opening of the East Vietnam Sea (EVS). This paper addresses the scarcity of geophysical studies in the basin by using gravity anomalies to investigate its structural and tectonic characterization. Several edge enhancement techniques are estimated on a synthetic model before applying them to the Bouguer field of the basin. Bouguer data maps upward continued to different heights, and the corresponding results are also analyzed. Finally, the gravity inversion is used to map the Moho structure of the basin. The outcomes show that the enhanced horizontal gradient (EHG) filter yields sharper signals over the boundaries, and avoids bringing false edges; therefore, its outputs are used to establish a new subsurface structural map where many NNE-SSW, NE-SW, and N-S trending structures are recognized in the basin. The identified structural trends show a close correspondence with the orientations of the two major seafloor spreading stages of the EVS and may therefore reflect the influence of the regional tectonic regime associated with these spreading events. The inversion result shows that the Moho depth of the basin is approximately 9.7–22.4 km with a mean depth of 17 km, which is in agreement with the depth from seismic data. The findings demonstrate that the tectonic evolution of the TC-VM basin is closely tied to the broader geodynamic processes of the EVS, influenced by its sea-floor spreading and opening.