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Basin Study in Atambua, West Timor, Indonesia from Gravity Data

Journal of Mathematical and Fundamental Sciences · Vol. 54 No. 1 (2022) · hlm. 138–150

DOI
10.5614/j.math.fund.sci.2022.54.1.8
ISSN
2338-5510, 2337-5760
Terbit
2022-09-02
Penerbit
Directorate for Research and Innovation (DRI) ITB
Bahasa
eng

Abstrak

Timor Island, Indonesia has complex geological structures related to its tectonic history. There is an existing subsurface geological model that is based on geophysical data. It is limited to the regional crustal scale and has a relatively low spatial resolution. The objective of our study was to delineate the sedimentary basin configuration of the area, both laterally and vertically, based on gravity data. Spectral analysis of the Bouguer anomaly allowed for anomaly enhancement by wavenumber domain filtering. Two main basins were identified from elongated low gravity anomalies that follow a SW-NE trend, i.e., the Central Basin and the Atambua Basin. The 2½D gravity modeling of selected profiles perpendicular to the regional structural direction revealed the sedimentary fills of the basins and the basement based on their densities. The Bobonaro mélanges and Viqueque sequences dominate and overlay the syn-rift (Kekneno sequences) and post-rift (Kolbano sequences) with varying lithology. These para-autochthon sediments are dominated by shale and carbonaceous rocks. Their respective thicknesses and depths of burial imply the possibility of hydrocarbon generation. The underlying basement may be associated with the Australian crust protruding from the south.

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28 penulis · 57 tautan kepenulisan bersama · 15 lintas organisasi

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  • Bandung Institute of Technology
  • University of Indonesia
  • Badan Geologi
  • Institut Teknologi Sepuluh Nopember
  • Sumatera Institute of Technology
  • Universiti Teknologi Petronas
  • National Research and Innovation Agency
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Rekan penulisOrganisasiArtikel bersama
Warsa WarsaBandung Institute of Technology7
Darharta DahrinBandung Institute of Technology4
Mohammad Syamsu RosidUniversity of Indonesia2
Abdul HarisUniversity of Indonesia2
Selvi Misnia IrawatiSumatera Institute of Technology2
Hidayat HidayatBadan Geologi2
Wahyudi Widyatmoko ParnadiBandung Institute of Technology1
Djoko SantosoBandung Institute of Technology1
Accep HandyarsoBadan Geologi1
Sungkono SungkonoInstitut Teknologi Sepuluh Nopember1
Prihadi SumintadiredjaAfiliasi tidak diketahui1
Diky IrawanBandung Institute of Technology1
G.M. Lucki JunursyahBadan Geologi1
Alviyanda AlviyandaSumatera Institute of Technology1
Ni Putu Juliyant Ananda Rika PangastutiAfiliasi tidak diketahui1
Rose Firdiany Nur SukmaUniversity of Indonesia1
Abi MawalidUniversity of Indonesia1
Guntur Adham SyahputraUniversity of Indonesia1
Ricky Adi WibowoUniversity of Indonesia1
Eki KomaraInstitut Teknologi Sepuluh Nopember1
Wien LestariInstitut Teknologi Sepuluh Nopember1
Muhammad Faiz NugrahaUniversiti Teknologi Petronas1
Abdul Halim Abdul LatiffUniversiti Teknologi Petronas1

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Sumber metadata: OAI-PMH (metadata jurnal) https://journals.itb.ac.id/index.php/jmfs/oai, pertama di-harvest 9 Nov 2026, terakhir terlihat 9 Nov 2026.
Metadata asli (oai_dc) 
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	<dc:title xml:lang="en-US">Basin Study in Atambua, West Timor, Indonesia from Gravity Data</dc:title>
	<dc:creator>Wijanarko, Edy</dc:creator>
	<dc:creator>Arisbaya, Ilham</dc:creator>
	<dc:creator>Sumintadireja, Prihadi</dc:creator>
	<dc:creator>Warsa</dc:creator>
	<dc:creator>Grandis, Hendra</dc:creator>
	<dc:subject xml:lang="en-US">2.5D modelling</dc:subject>
	<dc:subject xml:lang="en-US">Atambua</dc:subject>
	<dc:subject xml:lang="en-US">basement</dc:subject>
	<dc:subject xml:lang="en-US">basin</dc:subject>
	<dc:subject xml:lang="en-US">gravity</dc:subject>
	<dc:subject xml:lang="en-US">Timor Island</dc:subject>
	<dc:subject xml:lang="en-US">Geosciences</dc:subject>
	<dc:subject xml:lang="en-US">Earth Sciences</dc:subject>
	<dc:subject xml:lang="en-US">Geophysics</dc:subject>
	<dc:description xml:lang="en-US">Timor Island, Indonesia has complex geological structures related to its tectonic history. There is an existing subsurface geological model that is based on geophysical data. It is limited to the regional crustal scale and has a relatively low spatial resolution. The objective of our study was to delineate the sedimentary basin configuration of the area, both laterally and vertically, based on gravity data. Spectral analysis of the Bouguer anomaly allowed for anomaly enhancement by wavenumber domain filtering. Two main basins were identified from elongated low gravity anomalies that follow a SW-NE trend, i.e., the Central Basin and the Atambua Basin. The 2½D gravity modeling of selected profiles perpendicular to the regional structural direction revealed the sedimentary fills of the basins and the basement based on their densities. The Bobonaro mélanges and Viqueque sequences dominate and overlay the syn-rift (Kekneno sequences) and post-rift (Kolbano sequences) with varying lithology. These para-autochthon sediments are dominated by shale and carbonaceous rocks. Their respective thicknesses and depths of burial imply the possibility of hydrocarbon generation. The underlying basement may be associated with the Australian crust protruding from the south.</dc:description>
	<dc:publisher xml:lang="en-US">Directorate for Research and Innovation (DRI) ITB</dc:publisher>
	<dc:date>2022-09-02</dc:date>
	<dc:type>info:eu-repo/semantics/article</dc:type>
	<dc:type>info:eu-repo/semantics/publishedVersion</dc:type>
	<dc:format>application/pdf</dc:format>
	<dc:identifier>https://journals.itb.ac.id/index.php/jmfs/article/view/17701</dc:identifier>
	<dc:identifier>10.5614/j.math.fund.sci.2022.54.1.8</dc:identifier>
	<dc:source xml:lang="en-US">Journal of Mathematical and Fundamental Sciences; Vol. 54 No. 1 (2022); 138-150</dc:source>
	<dc:source>2338-5510</dc:source>
	<dc:source>2337-5760</dc:source>
	<dc:source>10.5614/j.math.fund.sci.2022.54.1</dc:source>
	<dc:language>eng</dc:language>
	<dc:relation>https://journals.itb.ac.id/index.php/jmfs/article/view/17701/5943</dc:relation>
	<dc:rights xml:lang="en-US">Copyright (c) 2022 Journal of Mathematical and Fundamental Sciences</dc:rights>
</oai_dc:dc>