Gravity investigation of a suspected meteorite impact crater in Langkawi Island, Malaysia

Abdul Rahim Samsudin and Umar Hamzah and Lim, Cheng Han and Tjia, H. D. (2010) Gravity investigation of a suspected meteorite impact crater in Langkawi Island, Malaysia. In: Geological heritage of Malaysia: geoheritage conservation (1997-2009). Institut Alam Sekitar dan Pembangunan (LESTARI), Universiti Kebangsaan Malaysia, Bangi, Selangor, pp. 287-296. ISBN 9789675227370

A detailed gravity survey was carried out to investigate the subsurface features of the suspected impact crater know as Mahsuri Ring in Langkawi Island, Malaysia. The gravity measurements were made at about 100 stations using a La Coste & Romberg gravity meter with distances between stations ranging from 200 to 500 metres. In general, the gravity values are lower in the central portion of the impact structure and are relatively higher along the rim. The residual gravity anomalies along the E-W and NE-SW profiles were interpreted to obtain the depth and subsurface structure of the impact crater. The E-W profile shows two basins-like structures with the first one having a maximum depth of depression of about 107 m and 2 km in diameter. Another basin is found about 0.5 km to the west with depth of about 45 m and 2.5 km in diameter. These basins are mostly covered with Quaternary alluvium. The profile along the NE-SW direction across the impact crater also shows a depression structure with maximum depth of about 103 m and 1.8 km in diameter.

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Abstract

A detailed gravity survey was carried out to investigate the subsurface features of the suspected impact crater know as Mahsuri Ring in Langkawi Island, Malaysia. The gravity measurements were made at about 100 stations using a La Coste & Romberg gravity meter with distances between stations ranging from 200 to 500 metres. In general, the gravity values are lower in the central portion of the impact structure and are relatively higher along the rim. The residual gravity anomalies along the E-W and NE-SW profiles were interpreted to obtain the depth and subsurface structure of the impact crater. The E-W profile shows two basins-like structures with the first one having a maximum depth of depression of about 107 m and 2 km in diameter. Another basin is found about 0.5 km to the west with depth of about 45 m and 2.5 km in diameter. These basins are mostly covered with Quaternary alluvium. The profile along the NE-SW direction across the impact crater also shows a depression structure with maximum depth of about 103 m and 1.8 km in diameter.

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Item Type:	Book Section
Additional Information:	Available at Perpustakaan Sultan Abdul Samad, Universiti Putra Malaysia, 43000 UPM Serdang, Malaysia. QE299.5 G345 Call Number
AGROVOC Term:	Meteorus
AGROVOC Term:	gravity
AGROVOC Term:	geophysical data
AGROVOC Term:	natural resources
AGROVOC Term:	earth sciences
AGROVOC Term:	gravity surveys
AGROVOC Term:	environmental impact assessment
AGROVOC Term:	geophysicists
AGROVOC Term:	geologists
AGROVOC Term:	gravity platforms
Geographical Term:	Malaysia
Depositing User:	Ms. Azariah Hashim
Date Deposited:	21 Jan 2025 06:43
Last Modified:	04 Feb 2025 06:29
URI:	http://webagris.upm.edu.my/id/eprint/1025

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