IDENTIFIKASI SISTEM PANAS BUMI MENGGUNAKAN METODE MAGNETOTELLURIK DI SEKITAR DAERAH TEGAL

• Main Author: Firmansyah, Dicky (Author)
• Format: Book
• Published: 2014-10-31.
• Subjects: Thesis; NonPeerReviewed
• Online Access: Link Metadata
• Notes: http://repository.upi.edu/15144/1/S_FIS_1002318_title.pdf; http://repository.upi.edu/15144/3/S_FIS_1002318_abtract.pdf; http://repository.upi.edu/15144/2/S_FIS_1002318_Table_of_contant.pdf; http://repository.upi.edu/15144/4/S_FIS_1002318_Chapter1.pdf; http://repository.upi.edu/15144/5/S_FIS_1002318_Chapter2.pdf; http://repository.upi.edu/15144/6/S_FIS_1002318_Chapter3.pdf; http://repository.upi.edu/15144/7/S_FIS_1002318_Chapter4.pdf; http://repository.upi.edu/15144/8/S_FIS_1002318_Chapter5.pdf; http://repository.upi.edu/15144/9/S_FIS_1002318_bibliography.pdf; http://repository.upi.edu/15144/10/S_FIS_1002318_appendix.pdf
• Keywords: QC Physics

Potensi panas bumi di Indonesia hampir tersebar di seluruh wilayah Indonesia, tetapi belum seluruhnya dilakukan penelitian secara rinci. Penelitian pada tahap awal memerlukan survei pendahuluan, salah satunya yaitu survei Geofisika. Survei Geofisika digunakan untuk mengetahui struktur bawah permukaan daerah potensi panas bumi. Metode Geofisika yang digunakan untuk mengetahui struktur panas bumi yaitu metode Magnetotellurik (MT). Metode MT memanfaatkan variasi medan magnetik dan medan listrik yang berasal dari alam. Keunggulan metode MT yaitu mampu menjangkau hingga beberapa kilometer di bawah permukaan bumi. Penelitian ini bertujuan untuk mengetahui keberadaan sistem panas bumi berdasarkan nilai resistivitas batuan. Penelitian yang dilakukan menghasilkan model dua dimensi resistivitas terhadap kedalaman. Nilai resistivitas pada batuan yang sangat rendah yaitu bernilai 4 - 32 Ωm sebagai batuan penutup (cap rock) sistem panas bumi, sedangkan batuan yang memiliki nilai resistivitas 128 - 512 Ωm sebagai batuan yang menampung fluida panas bumi (reservoir). Batuan yang memiliki nilai resistivitas diatas 1024 Ωm merupakan batuan sebagai sumber panas (heat source) pada sistem panas bumi dan terlihat bagian seperti sesar pada daerah penelitian. Kata Kunci : panas bumi, metode magnetotellurik, resistivitas batuan Geothermal potential has almost spread widely in Indonesia, but none of them are verified yet in detail. Geophysics Survey is needed as a preface research on the first stage. Geophysics Survey is used to discover the subsurface structure of the geothermal area. Geophysics method that is used to discover geothermal structure is Magnetotellurics (MT) method. MT method uses variations of the magnetic field and electric field derived from nature. The advantage of this method is being able to reach up to some kilometers beneath the Earth's surface. This research aims to discover the existence of geothermal system based on resistivity value of the rock. The result shows that there is two dimension model of resistivity concerning the deepness. Resistivity value of the low rock is 4 - 32 Ωm and considered as cap rock, whereas rock which has resistivity value between 128 - 512 Ωm is considered as reservoir rock. Rock which has resistivity value above 1024 Ωm is considered as heat source and there is a part of fault that is seen from the research area. Key Words : geothermal, magnetotelluric method, rock resistivity