Muhammad Audy Naufal
Faculty of Geological engineering, Universitas Padjadjaran

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SEISMIC STRATIGRAPHY ANALYSIS OF 2D SEISMIC CROSS SECTION IN ARAFURA SEA, PAPUA Muhammad Audy Naufal; Nurdrajat Nurdrajat; Budi Muljana; Catur Purwanto
Journal of Geological Sciences and Applied Geology Vol 4, No 2 (2021): Journal of Geological Science and Applied Geology
Publisher : Faculty of Geological Engineering, Universitas Padjadjaran

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24198/gsag.v4i2.29153

Abstract

Arafura Sea is one of the shallow marine located in eastern Indonesia. This is accommodated based on the bathymetry map of Arafura which has a depth of up to 90 meters. Stratigraphy in eastern Indonesia is quite complex, consisting of rocks aged up to Paleozoic. There have been five tectonic event since Pre-Cambrian until now, namely the pre-rift, syn-rift, passive margins, convergence and compression. The 2D seismic  cross section of line 5 acquired as the result of seismic data processing which is part of the Buru Formation consisting of shale siltstone, sandstone, limestone, calcareous sandstone aged from Late Miocene to Plio-Pleistocene. Bouguer Anomaly data from Buru Formation have a value of 1,8 – 2,2 gr /cc which shows fine grained sediments in the form of silt, clay, and sand which deposited on the continental shelf. 2D Seismic cross section of line 5 shows the direction of sediment deposition obtained from the south which continues to fill the geometry of the basin in the north and divided into 4 seismic facies based on the characteristics of the internal reflector, amplitude, frequency and continuity. From these characteristics, there is a process of changing depositional energy that tends to slow toward the center of the geometry space of the depositional basin so that the resulting sedimentation pattern is uniformed. A fault structure has been identified  which is formed the compressional force due to the presence of convergent tectonics which is perpendicular to the direction of the bedding