Analisis Sebaran Nikel Laterit Menggunakan Metode Ground Penetrating Radar (GPR) Pada Lapangan “HD” Blok XXX, Kolaka

Syahputra, Mohammad Hadi (2025) Analisis Sebaran Nikel Laterit Menggunakan Metode Ground Penetrating Radar (GPR) Pada Lapangan “HD” Blok XXX, Kolaka. Other thesis, Institut Teknologi Sepuluh Nopember.

Text 5017211010-Undergraduate_Thesis.pdf - Accepted Version Restricted to Repository staff only Download (5MB) | Request a copy

Abstract

Bijih nikel merupakan elemen vital bagi berbagai sektor industri yang dapat berasal dari dua jenis utama yaitu laterit dan sulfida. Di Indonesia nikel ditemukan dalam bentuk lateritik yang terbentuk melalui proses pelapukan batuan ultramafik. Metode yang kerap digunakan dalam eksplorasi nikel laterit adalah pengeboran karena memiliki tingkat akurasi yang relatif tinggi dalam penentuan sebaran lapisan. Namun, metode ini memiliki keterbatasan dimana membutuhkan lebih dari satu lubang bor untuk mengetahui persebaran nikel laterit, sehingga metode ini membutuhkan waktu dan biaya yang tidak sedikit. Pada penelitian ini diterapkan salah satu metode geofisika aktif yaitu Ground Penetrating Radar (GPR), dengan tujuan untuk mengidentifikasi keberadaan endapan nikel laterit dengan memanfaatkan gelombang elektromagnetik. GPR bersifat non destruktif, praktis, serta tidak membutuhkan biaya yang mahal. Pengukuran GPR dilakukan pada 9 lintasan di Blok XXX, Kabupaten Kolaka, Sulawesi Tenggara. Data hasil pengukuran lapangan diolah menggunakan beberapa filter dan koreksi topografi. Pengolahan 3D juga dilakukan untuk mendapatkan volume dan tonase pada area penelitian. Berdasarkan hasil pengolahan GPR yang telah divalidasi dengan data bor, lapisan limonit dan saprolit memiliki pola refleksi hummocky namun memiliki kontras amplitude yang berbeda. Picking batas lapisan laterit dilakukan guna mendapatkan persebaran ketebalan. Berdasarkan hasil interpolasi lapisan limonit memiliki ketebalan 3,3 hingga 12,3 meter sedangkan ketebalan lapisan saprolit 3,1 hingga 20 meter. Hasil model 3D diidapatkan nilai volume estimasi sumber daya nikel laterit pada limonit sebesar 25.846.256 m3 dengan tonase sebesar 334.967 ton dan pada saprolit memiliki volume sebesar 40.313.875 m3 dengan tonase sebesar 901.418 ton.
=================================================================================================================================
Nickel ore is a vital element for various industrial sectors that can come from two main types, namely laterite and sulfide. In Indonesia, nickel is found in lateritic form formed through the weathering process of ultramafic rocks. The method often used in lateritic nickel exploration is drilling because it has a relatively high level of accuracy in determining the distribution of layers. However, this method has limitations in that it requires more than 1 drill hole to determine the distribution of nickel laterite, so this method requires a lot of time and money. In this research, one of the active geophysical methods is Ground Penetrating Radar (GPR), with the aim of identifying the presence of nickel laterite deposits by utilizing electromagnetic waves. GPR is non-destructive, practical, and does not require expensive costs. GPR measurements were carried out on 9 tracks in Block XXX, Kolaka Regency, Southeast Sulawesi. Field measurement data were processed using several filters and topographic corrections. 3D processing was also carried out to obtain volume and tonnage in the research area. Based on the results of GPR processing that has been validated with databases, the limonite and saprolite layers have hummocky reflection patterns but have different amplitude contrasts. Picking the boundaries of the laterite layer is done to get the thickness distribution. Based on the interpolation results, the limonite layer has a thickness of 3.3 to 12.3 meters while the saprolite layer thickness is 3.1 to 20 meters. The results of the 3D model obtained the estimated volume value of laterite nickel resources in limonite of 25,846,256 m^3 with a tonnage of 334,967 tons and in saprolite has a volume of 40,313,875 m^3 with a tonnage of 901,418 tons.

Item Type:	Thesis (Other)
Uncontrolled Keywords:	Electromagnetic Waves, Ground Penetrating Radar (GPR), Limonite, Saprolite, Gelombang Elektromagnetik, Ground Penetrating Radar (GPR), Limonit, Saprolit
Subjects:	Q Science > QC Physics > QC100.5 Measuring instruments (General) Q Science > QC Physics > QC585 Dielectrics Q Science > QE Geology > QE33.2.R33 Ground penetrating radar Q Science > QE Geology > QE571 Sedimentation and deposition. Sediment transport. Erosion. Q Science > QE Geology > QE601 Geology, Structural Q Science > QE Geology > QE604 Deformation T Technology > T Technology (General) > T57.5 Data Processing T Technology > TN Mining engineering. Metallurgy > TN269 Prospecting--Geophysical methods
Divisions:	Faculty of Civil, Planning, and Geo Engineering (CIVPLAN) > Geophysics Engineering > 33201-(S1) Undergraduate Thesis
Depositing User:	Mohammad Hadi Syahputra
Date Deposited:	22 Jul 2025 04:06
Last Modified:	22 Jul 2025 04:06
URI:	http://repository.its.ac.id/id/eprint/120414

Actions (login required)

View Item