POTENSI BAHAYA GEOLOGI DI PERAIRAN LHOKSEUMAWE ACEH

Lukman Arifin, Subarsyah Subarsyah


Abstract


Penelitian seismik pantul dangkal di perairan Lhoksemawe dilakukan untuk mengetahui kondisi geologi di bawah permukaan dasar laut. Adanya potensi bahaya geologi suatu daerah penelitian dapat diketahui dengan menganalisis kondisi geologinya. Hasil interpretasi rekaman seismik memperlihatkan struktur geologi sesar, pengangkatan, pelipatan dan intrusi. Sesar-sesar aktif yang terdapat di darat umumnya menerus hingga ke pantai dan lepas pantai. Untuk menentukan daerah yang mungkin dapat mengakibatkan terjadinya bahaya geologi maka dibuat zonasi berdasarkan morfologi dasar laut. Kewaspadaan terhadap bahaya geologi yang mungkin terjadi di laut terutama pada zona B dan zona C. Longsoran dapat terjadi di zona B karena morfologinya agak terjal, dan sesar aktif pada zona C dapat mengakibatkan gempa. Zona A dengan kedalaman antara 0 hingga 200 meter dapat dikatagorikan sebagai zona cukup aman. Pembangunan di daerah pantai hingga lepas pantai cukup aman pada kawasan kedalaman hingga 200 meter.
Kata kunci: potensi, bahaya geologi, struktur geologi, Lhokseumawe

Shallow seismic reflection research in the Lhokseumawe waters was conducted to determine the geological conditions beneath the seabed surface. The geological hazard potential of study area can be known to analyze its geological conditions. The results of seismic interpretation shows that geological structures as fault, up lift, fold and intrusion. Active faults on land are generally being up to the coast and offshore. To determine areas that may result in the geological hazards created zoning based on morphological seabed. Precautions against geological hazards that may occur in the sea, mainly in zones B and C.Landslide can be occured in B zone because the morphology rather steep, and the active fault on C zone can be resulted the earthquakes. The A zone with the depth between 0 to 200 meters can be considered safe zone. Development in coastal to offshore areas may be quite safe in the depth up to 200 meters.
Keyword: Potency, geological hazard, geology structure, Lhokseumawe


Keywords


potensi; bahaya geologi; struktur geologi; Lhokseumawe

Full Text:

PDF

References


Astawa, I,N., Silalahi, I.R., Rahardiawan, R., 2012. Geologi Bawah Permukaan Dasar Laut Perairan Lembar peta 0421, Daerah istimewa Aceh, Jurnal Geologi Kelautan, 10(2), h 101-115

Berglar, K., Gaedicke, C., Dieter Franke, D.,Ladage, S., Frauke Klingelhoefer, F., Djajadihardja, Y.S. 2010. Structural evolution and strike-slip tectonics off north-western Sumatra.Tectonophysics, 480 ( 1-4), h 119-132

Daryono, M.R., dan Adrin, T., 2016. Surface Rupture and Geotechnical Features of The July 2, 2013 Tanah Gayo Earthquake, Indonesian Journal On Geoscience, 3 (2) h.95-105

Hamilton, W. 1981.Subduction in the Indonesian region. Talwani, M., ed. Island arcs deep sea trenchs and back arc basin. Walter C. Pitman III. AGU.Maurice Ewing Series 1.

Washington D.C., 2nd Printing.

http://www.msn.com/id-id/berita/nasional/penyebab-gempa-6,4-sr-guncang-aceh/7 Desember, 2016

Kearey, P., Brooks, M., Hill, I., 2002. An Introduction to Geophysical Exploration, Third Edition, Blackwell Science Ltd, London, 262 h

Logan, N., 2014. Indian Ocean Tsunami: Remembering The Day The Wave Came, National Online Journalist.

Malod, J.A. & Kemal, B.M. 1996. The Sumatra margin: oblique subduction and lateral displacement of the accretionary prism. From Hall, R. & Blundell, D. (eds). 1996. Tectonic Evolution of Southeast Asia. Geological Society Special Publication No. 106, h 19-28.

Naibaho, T., Rahardiawan, R., Silalahi, I.R., Hutagaol, J.P., Sutisna, N., Ali, A., Sinaga, A.C., 2011. Pemetaan Geologi dan Geofisika Perairan lembar Peta 0521 Lhokseumawe Aceh Darussalam, Laporan Puslitbang Geologi Kelautan, Tidak dipublikasi.

Permana, H., Handayani, L., dan Gaffar, E.Z., 2010. Study Awal Pola Struktur Busur Muka Aceh, Sumatra Bagian Utara (Indonesia): Penafsiran dan Analisis Peta Batimetri, Jurnal Geologi Kelautan, 8(3), h 105-118

Pertamina &Beicip, 1988.Hydrocarbon Potential of Western Indonesia, Unpublished

Pubellier, M., Rangin, C and Le Pichon, X. 2005. Deep Offshore Tectonics of South East

Asia (Dotsea). A synthesis of deep marine data in Sotheast Asia.Memoires de la Societe Geologique de France

Quillin, R. Mc., Bacon, M., Barclay, W., 1979. An Introduction to Seismic Interpretation, Graham & Trotman Limited, London, 84 h .

Schlüter, H.U., Gaedicke, C., Roeser, H.A., Schreckenberger, B., Meyer, H., and Rreichert, C., Djajadihardja, Y., Prexl, A. Tectonic features of the southern Sumatra-western Java fore-arc of Indonesia.Tectonics, 21(5), h 1029-1048

Sieh, K. and Natawidjaja, D.H. 2000. Neotectonics of the Sumatran fault, Indonesia. Journal of Geophysical Research, 105 (B12), h 28295–28326

Susilohadi, S., Gaedicke, C., and Ehrhardt, A. 2005. Neogene Structures And Sedimentation History Along The Sunda Forearc Basin Off Southwest Sumatra And Southwest Java. Marine Geology , 219 (2005) 133-154.




DOI: http://dx.doi.org/10.32693/jgk.v16i2.565

Refbacks

  • There are currently no refbacks.



Terakreditasi oleh: Direktorat Jenderal Penguatan Riset dan Pengembangan, Kemenristek Dikti