STRUKTUR GEOLOGI PERAIRAN MOROWALI – TELUK KENDARI DARI HASIL INTERPRETASI PENAMPANG MIGRASI SEISMIK 2D

Tumpal Bernhard Nainggolan, Gusti Muhammad Hermansyah, Priatin Hadi Wijaya

Abstract


Lokasi penelitian mencakup sebagian besar wilayah perairan Morowali sampai ke selatan ke arah Teluk Kendari bertujuan untuk mendapatkan gambaran struktur geologi dan morfologi bawah permukaan dasar laut Kepingan Benua Banggai-Sula sampai Kepingan Benua Sulawesi Tenggara. Hasil peta batimetri menunjukkan kedalaman paling dangkal sekitar 500 meter terdapat di bagian utara dengan pola kontur tertutup yang membentuk cekungan kecil yang tidak begitu curam, sedangkan kearah bagian timur dan selatan-tenggara memperlihatkan kondisi morfologi dasar laut semakin dalam mencapai 2000 meter dan curam. Dari hasil penampang seismik didapatkan informasi perairan Morowali terdapat enam sekuen dengan seismic basement disebandingkan dengan Kompleks Batuan Malihan berumur Karbon, sedangkan struktur geologi teluk Kendari secara umum menunjukkan pembagian dua zona, yaitu zona pertama di bagian timur, perlapisan sedimen sangat tipis dibandingkan dengan zona barat.


Kata kunci : struktur geologi, morfologi, peta batimetri, interpretasi penampang seismik

 

The survey covered most part of Morowali waters to the south towards Kendari Gulf aims to achieve an overview of the geological structures and morphological beneath seabed sub-surface of Banggai-Sula and Southeast Sulawesi micro-continent. The bathymetric map shows the shallowest depth about 500 meters in the north with a closed contour pattern that form a sloping basin, while towards the eastern and south-southeast part shows a deeper morphological condition up to 2000 meters and steep. Seismic cross-section interpretation of Morowali waters describe six sequences with seismic basement compared to Malihan rocks of Carbon era, while the geological structure of Kendari Gulf generally shows very thin sedimentary layers of eastern zone compared to western zone.
Keywords : geological structures, morphological information, bathymetric map, seismic cross-section interpretation


Keywords


struktur geologi; morfologi; peta batimetri; interpretasi p

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