利用边缘检测和三维欧拉解卷积卫星重力数据解读印度尼西亚盛港盆地的结构构造

IF 1.3 4区 地球科学 Q3 GEOSCIENCES, MULTIDISCIPLINARY
J. Safani, Khalil Ibrahim, WA Deni, Al Rubaiyn, Firdaus Firdaus, Harisma Harisma
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引用次数: 0

摘要

:东瓦拉内断层带(East Walanae Fault Zone)和西瓦拉内断层带(West Walanae Fault Zone)是苏拉威西岛南臂的两个活跃断层段。盛港盆地就是由这两个断裂带形成的。这种地质复杂性使得盛港盆地成为一个非常值得研究的地区。这项研究的目的是:(1)确定盆地边界和岩性接触;(2)估计断层段的位置;以及(3)建立盛港盆地下的基底模型。采用 GGMPlus 数据集的自由空气重力异常,然后使用布格尔和地形修正法进行修正,以提供完整的布格尔重力异常(CBA)。使用多项式曲面拟合将残余重力数据从 CBA 中分离出来。采用九种边缘检测滤波器来识别结构构造(即盆地边界、岩性接触和断层段)。利用欧拉解卷积来描述地质结构并估计其深度。应用径向平均功率谱和反演残余重力异常数据来分析研究区域的基底。分析结果表明,水平倾斜角梯度(HGTA)技术在确定盆地边界和岩性接触方面具有优越性。在东盛港盆地中发现了三个新的子盆地。此外,HGTA 还能很好地揭示岩性接触。倾斜角梯度振幅(TAHG)技术可以很好地描述浅层和深埋地质结构的线型。倾斜角梯度振幅法和欧拉解卷积法可以确定凹陷带的迹象,以及凹陷带内 24 个新的潜在断层段。在断层段附近发生的一些地震支持了这一断层假设。重力数据得出的基底模型与地震数据得出的基底模型具有极其相似的模式和深度趋势
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Interpreting structural configuration of the Sengkang Basin of Indonesia using edge detection and 3-D Euler deconvolution to satellite gravity data
: The East Walanae Fault Zone and the West Walanae Fault Zone are the two active fault segments in the south arm of Sulawesi. These fault segments are responsible for the formation of the Sengkang Basin. This geological complexity makes the Sengkang Basin a very interesting area to study. This research aims to (1) identify basin boundaries and lithological contacts; (2) estimate the positions of fault segments; and (3) model the basement beneath the Sengkang Basin. The free-air gravity anomaly from the GGMPlus dataset is employed and then corrected using Bouguer and terrain corrections to provide the complete Bouguer gravity anomaly (CBA). Polynomial surface fitting is used to separate the residual gravity data from the CBA. Nine edge detection filters are employed to identify structural configuration (i.e. basin boundaries, lithological contacts, and fault segments). The Euler deconvolution is utilized to describe the geological structure and estimate its depth. The radially average power spectrum and inversion of the residual gravity anomaly data are applied to analyze the basement of the study area. The results of the analysis show the superiority of the horizontal gradient of tilt angle (HGTA) technique in identifying basin boundaries and lithological contacts. Three new subbasins in the East Sengkang Basin are identified. Furthermore, the HGTA can also reveal lithological contacts very well. Tilt angle of the gradient amplitude (TAHG) technique provides an excellent description of the lineaments of both shallow and deeper buried geological structures. The TAHG approach and Euler deconvolution may define indications of depression zones and 24 new potential fault segments within the depression zones. A number of earthquakes that have happened near the fault segments support this fault assumption. The basement model derived from gravity data has extremely similar patterns and depth trends to that derived from seismic data
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来源期刊
Turkish Journal of Earth Sciences
Turkish Journal of Earth Sciences 地学-地球科学综合
CiteScore
2.40
自引率
10.00%
发文量
6
审稿时长
6 months
期刊介绍: The Turkish Journal of Earth Sciences is published electronically 6 times a year by the Scientific and Technological Research Council of Turkey (TÜBİTAK). It is an international English-language journal for the publication of significant original recent research in a wide spectrum of topics in the earth sciences, such as geology, structural geology, tectonics, sedimentology, geochemistry, geochronology, paleontology, igneous and metamorphic petrology, mineralogy, biostratigraphy, geophysics, geomorphology, paleoecology and oceanography, and mineral deposits. Contribution is open to researchers of all nationalities.
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