Tectonic division of the Offshore Indus Basin by integrated gravity and magnetic study

ZHANG Feifei; HAN Bo; ZHU Yingjie; LIAO Jing; WANG Wanyin

doi:10.16562/j.cnki.0256-1492.2024070102

Marine Geology & Quaternary Geology > 2024 > Corrected proof > DOI: 10.16562/j.cnki.0256-1492.2024070102

ZHANG Feifei，HAN Bo，ZHU Yingjie，et al. Tectonic division of the Offshore Indus Basin by integrated gravity and magnetic study[J]. Marine Geology & Quaternary Geology，xxxx，x(x)： x-xx. DOI: 10.16562/j.cnki.0256-1492.2024070102

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Tectonic division of the Offshore Indus Basin by integrated gravity and magnetic study

ZHANG Feifei^{1, 2, 3,},
HAN Bo²,
ZHU Yingjie²,
LIAO Jing²,
WANG Wanyin^{1, 3, 4, ,}

1.
School of Geological Engineering and Geomatics, Chang’an University, Xi’an 710054, China
2.
Qingdao Institute of Marine Geology, China Geological Survey, Qingdao 266237, China
3.
National Engineering Research Center of Offshore Oil and Gas Exploration, Beijing 100028, China
4.
Key Laboratory of Marine Geology and Environment, Institute of Oceanology, Chinese Academy of Sciences, Qingdao 266071, China

More Information

Received Date: June 30, 2024
Revised Date: August 18, 2024
Accepted Date: August 18, 2024
Available Online: September 25, 2024

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Abstract

Abstract

The Offshore Indus Basin (OIB) is an important oil and gas exploration target area in Pakistan sea area. The exploration of the basin, limited by the quantity and quality of exploration data, is still in the early stage, which restricts the oil and gas investigation in this area. Based on the new generation of satellite altimetry gravity anomaly data (V29.1) and magnetic data from the Earth Magnetic Anomaly Grid (EMAG2-V2), the integrated gravity and magnetic field technique was applied to study the tectonic framework of the OIB, with which the integrated gravity and magnetic field was established and the structure of the OIB was interpreted. Results show that the areas of low-value magnetic and low-value gravity correspond to the sedimentary depressions, while those of high-value magnetic and low-value gravity correspond to the depressions with magma intrusions, whereas the areas of high-value magnetic and high-value gravity correspond to the uplift areas of the basin, and the areas of low-value magnetic and high-value gravity correspond to the carbonate platforms. Combined with the ocean drilling and 2D seismic profile data, three depressions and two uplifts in E-W in the OIB were inferred. Based on the previous tectonic division, the western depression and the western uplift in the southwestern corner of the basin were re-defined, the scope of the southern depression was expanded, and the southern edge of the basin was extended to near the Palatina ridge. This study provided evidence for basic geological and oil-gas exploration in the OIB and its adjacent areas.
- integrated gravity and magnetic field,
- tectonic framework,
- oil and gas exploration,
- Offshore Indus Basin

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References (32)

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