Pemisahan Anomali Regional dan Residual pada Metode Gravitasi Menggunakan Metode Moving Average, Upward Continuation dan Polynomial
DOI:
https://doi.org/10.25077/jfu.13.1.1-7.2024Keywords:
Anomali Regional, Anomali Residual, Moving Average, Upward Continuation, PolynomialAbstract
Pemisahan anomali regional dan residual adalah hal yang harus dilakukan dalam pengolahan data yang berhubungan dengan geologi bawah permukaan. Tidak ada ketentuan khusus tentang metode terbaik yang harus digunakan dalam pemisahan anomali, karena pemisahan anomali bersifat subjektif. Penelitian ini bertujuan untuk mengidentifikasi struktur bawah permukaan pada daerah Kepulauan Mentawai dengan menggunakan persebaran nilai anomali.Dalam penelitian ini, metode yang digunakan adalah metode moving average, upward continuation dan polynomial untuk menginterpretasikan kontur anomali regional dan residual Kepulauan Mentawai. Hasil dari ketiga metode tersebut menunjukkan bahwa upward continuation mencerminkan anomali regional dan residual Kepulauan Mentawai lebih baik dibandingkan metode moving average dan polynomial, karena pada upward continuation memiliki kontur dan nilai anomali mendekati kontur dan nilai anomali Bouguer  lengkap dan kontur struktur geologi. Sebaran nilai anomali yang rendah berada pada sekitar wilayah Padang, Pulau Siberut, Pulau Sipora dan Pulau Pagai, sehingga diidentifikasi wilayah tersebut memiliki struktur bawah permukaan dengan nilai massa jenis yang rendah. Sedangkan anomali sedang berada pada laut dangkal yang diidentifikasi memiliki massa jenis yang sedang, dan anomali tinggi berada pada laut dalam di sekitar wilayah Indian Ocean diidentifikasi memiliki massa jenis yang tinggi.
References
Aditama, F., Jaya, M. N., Rasimeng, S., & Dani, I. (2020). Metode Polynomial Untuk Memisahakan Anomaly Residual dan Regional Pada Data Gayaberat Daerah Pasaman Barat, Sumatera Barat. Jurnal Geocelebes.
Azad, M.-R., Koneshloo, M., Kamakar Rouhani, A., & Aghajani, H. (2016). Comparison of factorial kriging analysis method and upward continuation filter to recognize subsurface structures—a case study: gravity data from a hydrocarbon field in the southeast sedimentary basins of the East Vietnam Sea. Acta Geophysica, 64, 398–416.
Blakely, R. J. (1996). Potential Theory in Gravity and Magnetic Applications. Cambridge University Press.
Efendi, R., Kadir, W. G. A., Santoso, D., Abdullah, C. I., & Alawiyah, S. (2013). Gravity gradient technique to identify fracture zones in Palu Koro strike-slip fault. Procedia Environmental Sciences, 17, 248–255.
Gabtni, H., & Jallouli, C. (2017). Regional-residual separation of potential field: an example from Tunisia. Journal of Applied Geophysics, 137, 8–24.
Hinze, W. J., Von Frese, R. R. B., Von Frese, R., & Saad, A. H. (2013). Gravity and magnetic exploration: Principles, practices, and applications. Cambridge University Press.
Karig, D. E., Suparka, S., Moore, G. F., & Hehanussa, P. E. (1979). Structure and Cenozoic Evolution of the Sunda Arc in the Central Sumatra Region: Convergent Margins.
Karunianto, A. J., Haryanto, D., Hikmatullah, F., & Laesanpura, A. (2017). Penentuan anomali gayaberat regional dan residual menggunakan filter Gaussian Daerah Mamuju Sulawesi Barat. Eksplorium: Buletin Pusat Teknologi Bahan Galian Nuklir, 38(2), 89–98.
Katili, J. A. (1975). Volcanism and plate tectonics in the Indonesian island arcs. Tectonophysics, 26(3–4), 165–188.
Kebede, H., Alemu, A., & Fisseha, S. (2020). Upward continuation and polynomial trend analysis as a gravity data decomposition, case study at Ziway-Shala basin, central Main Ethiopian rift. Heliyon, 6(1), e03292.
Muhajirin, M., Ismail, N., & Bukhari, B. (2020). The Computation of Residual and Regional Anomaly of Gravity Method Data By Polynomial Filter Using Microsoft Excel. Journal of Aceh Physics Society, 9(2), 37–41.
Nettleton, L. L. (1939). Determination of density for reduction of gravimeter observations. Geophysics, 4(3), 176–183.
Prasetyo, A. (2018). Estimasi Ketinggian Optimum Kontinuasi Ke Atas Untuk Pemisahan Data Gayaberat Dengan Menggunakan Korelasi Silang. Al-Jazari: Journal Mechanical Engineering, 3(1), 10–14.
Purnomo, J., Koesuma, S., & Yunianto, M. (2013). Pemisahan anomali regional-residual pada metode gravitasi menggunakan metode moving average, polynomial dan inversion. Indonesian Journal of Applied Physics, 3(1), 10–18.
Reynolds, J. M. (2011). An Introduction to Applied and Environmental Geophysics. Wiley.
Sahada, M. F., Pratiwi, I., Zulfayani, I., Syamsurijal, R., & Dani, I. (2021). Analisis Perbandingan Hasil Pemodelan Orde 1 dan Orde 2 Anomali Gaya Berat Menggunakan Metode Regrasi Polinomial Menggunakan Perangkat Lunak Matlab Studi Kasus Bandar Lampung. Geocelebes.
Setyanta, B. (2015). Model Kerak Daerah Busur Muka di Pulau Siberut dan Perairan di Sekitarnya Berdasarkan Analisis Anomali Gayaberat. Jurnal Geologi Dan Sumberdaya Mineral, 16(2), 55–65.
Supriyadi, S., Khumaedi, K., Sugiyanto, S., & Setiaswan, F. (2019). Pemisahan Anomali Regional dan Residual Data Gayaberat Studi Kasus di Kota Lama Semarang. Physics Education Research Journal, 1(1), 29–36.
Syukri, M. (2020). Pengantar Geofisika. Syiah Kuala University Press.
Telford, W. M., Telford, W. M., Geldart, L. P., & Sheriff, R. E. (1990). Applied Geophysics. Cambridge University Press.
Ulinnuha, H. (2015). Analisis Deformasi Aspek Geometrik Segmen Mentawai Akibat Gempa Tektonik 10 Juli 2013. Universitas Gadjah Mada.
Ulinnuha, H., Sunantyo, T. A., & Widjajanti, N. (2019). Analisis Deformasi Segmen Mentawai Fase Post-Seismic 10 Juli 2013. Seminar Nasional Geomatika, 3, 813–818.
Xu, Y., Hao, T., Li, Z., Duan, Q., & Zhang, L. (2009). Regional gravity anomaly separation using wavelet transform and spectrum analysis. Journal of Geophysics and Engineering, 6(3), 279–287.
Downloads
Published
How to Cite
Issue
Section
License
Copyright (c) 2024 Jurnal Fisika Unand
This work is licensed under a Creative Commons Attribution-NonCommercial 4.0 International License.
Please find the rights and licenses in JFU (Jurnal Fisika Unand).
1. License
The non-commercial use of the article will be governed by the Creative Commons Attribution license as currently displayed on Creative Commons Attribution-NonCommercial 4.0 International License.
2. Authors Warranties
The author warrants that the article is original, written by stated author(s), has not been published before, contains no unlawful statements, does not infringe the rights of others, is subject to copyright that is vested exclusively in the author and free of any third party rights, and that any necessary written permissions to quote from other sources have been obtained by the author(s).
3. User Rights
JFU's spirit is to disseminate articles published are as free as possible. Under the Creative Commons license, JFU permits users to copy, distribute, display, and perform the work for non-commercial purposes only. Users will also need to attribute authors and JFU on distributing works in the journal.
4. Rights of Authors
Authors retain the following rights:
- Copyright, and other proprietary rights relating to the article, such as patent rights,
- The right to use the substance of the article in future own works, including lectures and books,
- The right to reproduce the article for own purposes, provided the copies are not offered for sale,
- The right to self-archive the article.
5. Co-Authorship
If the article was jointly prepared by other authors, the signatory of this form warrants that he/she has been authorized by all co-authors to sign this agreement on their behalf, and agrees to inform his/her co-authors of the terms of this agreement.
6. Termination
This agreement can be terminated by the author or JFU upon two months notice where the other party has materially breached this agreement and failed to remedy such breach within a month of being given the terminating partys notice requesting such breach to be remedied. No breach or violation of this agreement will cause this agreement or any license granted in it to terminate automatically or affect the definition of JFU.
7. Royalties
This agreement entitles the author to no royalties or other fees. To such extent as legally permissible, the author waives his or her right to collect royalties relative to the article in respect of any use of the article by JFU or its sublicensee.
8. Miscellaneous
JFU will publish the article (or have it published) in the journal if the articles editorial process is successfully completed and JFU or its sublicensee has become obligated to have the article published. JFU may conform the article to a style of punctuation, spelling, capitalization, referencing and usage that it deems appropriate. The author acknowledges that the article may be published so that it will be publicly accessible and such access will be free of charge for the readers.
