Identifikasi Persebaran Situs Tondowongso Di Desa Gayam, Kec. Gurah, Kab. Kediri Menggunakan Metode Magnetik

Yudarsono, Genny Styllita (2024) Identifikasi Persebaran Situs Tondowongso Di Desa Gayam, Kec. Gurah, Kab. Kediri Menggunakan Metode Magnetik. Other thesis, Institut Teknologi Sepuluh Nopember.

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Abstract

Situs Tondowongso merupakan salah satu peninggalan dari Kerajaan Kediri yang berada di Dusun Tondowoso dan Dusun Sumber Petung, Desa Gayam, Kecamatan Gurah, Kabupaten Kediri, Jawa Timur. Situs ini pertama kali ditemukan oleh warga setempat pada tahun 2006 dan dilakukan proses ekskavasi pada tahun 2007 oleh para arkeolog yang teridentifikasi sebagai kompleks bangunan sakral. Hasil ekskavasi menunjukkan bantuan candi umumnya tersusun atas batu bata yang bersifat diamagnetik, sedangkan geologi daerah Situs Tondowongso tersusun atas endapan lahar yang bersifat feromagnetik. Dengan demikian, survei geomagnetik dilakukan untuk identifikasi persebaran situs Candi Tondowongso. Data geomagnetik yang terukur dianalisa melalui koreksi data (koreksi variasi harian dan koreksi medan magnet utama bumi), pemisahan anomali lokal dan regional, reduction to pole (RTP), gradien vertikal dan horizontal, serta analytic signal (AS). Dengan menggunakan beberapa metode tersebut, perkiraan arah persebaran batuan Situs Tondowongso teridentifikasi ke arah selatan menuju barat daya. Dugaan ini diperkuat dengan hasil analisis data metode VLF-EM, self potential, dan resistivitas di lokasi yang sama juga menunjukkan arah persebaran yang sama. Secara kuantitatif, data geomagnetik untuk anomali lokal diinversi menggunakan algoritma Flower Polination Algorithm (FPA) untuk mengetahui bentuk dan kedalaman dari batuan penyusun Situs Tondowongso. Hasil inversi ini menunjukkan bahwa anomali yang diduga batuan penyusun Situs Tondowongso berbentuk vertikal dyke dengan kedalaman 4,11±0,55 m pada sayatan A – A’, 4,62±0,76 m pada sayatan B – B’, dan 4,92±0,15 m untuk sayatan C – C’ sesuai dengan hasil ekskavasi sedalam 1-3 m dan 4-5 m.
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The Tondowongso site is one of the relics of the Kediri Kingdom located in Tondowoso Hamlet and Sumber Petung Hamlet, Gayam Village, Gurah District, Kediri Regency, East Java. The site was first discovered by local residents in 2006 and an excavation process was carried out in 2007 by archaeologists who identified it as a sacred building complex. The excavation results show that the temple relief is generally composed of bricks that are diamagnetic, while the geology of the Tondowongso Site area is composed of lava deposits that are ferromagnetic. Thus, a geomagnetic survey was conducted to identify the distribution of the Tondowongso Temple site. Measured geomagnetic data were analyzed through data correction (daily variation correction and earth's main magnetic field correction), separation of local and regional anomalies, reduction to pole (RTP), vertical and horizontal gradients, and analytic signal (AS). By using some of these methods, the estimated direction of distribution of the Tondowongso Site rocks is identified to the south towards the southwest. This assumption is reinforced by the results of data analysis of VLF-EM, self potential, and resistivity methods at the same location which also show the same distribution direction. Quantitatively, the geomagnetic data for the local anomalies were inversed using the Flower Pollination Algorithm (FPA) algorithm to determine the shape and depth of the constituent rocks of the Tondowongso Site. The inversion results show that the anomalies suspected to be the constituent rocks of the Tondowongso Site are vertical dyke-shaped with a depth of 4.11±0.55 m in incision A - A', 4.62±0.76 m in incision B - B', and 4.92±0.15 m for incision C - C' in accordance with the excavation results of 1-3 m and 4-5 m deep.

Item Type:	Thesis (Other)
Uncontrolled Keywords:	Metode Magnetik, Geoarkeologi, Gradien Horizontal, Analisis Sinyal, Gradien Vertikal, Magnetic Method, Geoarchaeology, Horizontal Gradient, Signal Analysis, Vertical Gradient
Subjects:	Q Science > QC Physics > QC765 Magnetic materials Q Science > QE Geology > QE1.F557 Magnetic anomalies--Measurement. Q Science > QE Geology > QE601 Geology, Structural
Divisions:	Faculty of Science and Data Analytics (SCIENTICS) > Physics > 45201-(S1) Undergraduate Thesis
Depositing User:	Genny Styllita Yudarsono
Date Deposited:	20 Aug 2024 08:09
Last Modified:	20 Aug 2024 08:09
URI:	http://repository.its.ac.id/id/eprint/112676

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