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Journal : Jurnal Neutrino : jurnal fisika dan aplikasinya

INTERPRETATION OF BOUGUER ANOMALY TO DETERMINE FAULT AND SUBSURFACE STRUCTURE AT BLAWAN-IJEN GEOTHERMAL AREA Azhari, Anjar Pranggawan; Maryanto, Sukir; Rachmansyah, Arief
Jurnal Neutrino Vol 9, No 1 (2016): October
Publisher : Department of Physics, Maulana Malik Ibrahim State Islamic University of Malang

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (1341.356 KB) | DOI: 10.18860/neu.v9i1.3664

Abstract

Gravity survey has been acquired by Gravimeter Lacoste Romberg G-1035 at Blawan-Ijen geothermal area. It was a focusing study from previous research. The residual Bouguer anomaly data was obtain after applying gravity data reduction, reduction to horizontal plane, and upward continuation. Result of Bouguer anomaly interpretation shows occurrence of new faults and their relative movement. Blawan fault (F1), F2, F3, and F6 are normal fault. Blawan fault is main fault controlling hot springs at Blawan-Ijen geothermal area. F4 and F5 are oblique fault and forming a graben at Banyupahit River. F7 is reverse fault. Subsurface model shows that Blawan-Ijen geothermal area was dominated by the Ijen caldera forming ignimbrite (ρ1=2.670 g/cm3), embedded shale and sand (ρ2=2.644 g/cm3) as Blawan lake sediments, magma intrusion (ρ3=2.814 g/cm3 ρ7=2.821 g/cm3), andesite rock (ρ4=2.448 g/cm3) as geothermal reservoir, pyroclastic air fall deposits (ρ5=2.613 g/cm3) from Mt. Blau, and lava flow (ρ6=2.890 g/cm3).
Co-Authors AA Sudharmawan, AA Adji, Alif Pradipta Adji, M. Alif Pradipta Adriansyah, Al Fajr Adriansyah, Al-Fajr Agus S Wicaksono Ahmad Sam’un Al-Fajr Adriansyah Aluh Nikmatullah Aluh Nikmatullah Ambarwati, Zaskia Putri Amrul Jihadi Apriani, Reni Arief Rachmansyah Arief Rachmansyah Baiq Rika Ayu Febrilia Bambang Budi Santoso Bambang Supeno, Bambang Cinantya N Dewi Dewi, Denisa Kartika Dori Kusuma Jaya Dori Kusuma Jaya Dwi Noorma Putri Dwi Noorma Putri Dwi Noorma Putri Dwi Putri Dwi Ratna Anugrahwati Farida Jufri, Afifah Hardiansah, Yayan Hendrawan Hendrawan HENNY RISANI PUTRI Hery Haryanto Hery Haryanto Hidayatun Nufus, Novita I Gusti Putu Muliarta Aryana I Ketut Ngawit I Ketut Ngawit, I Ketut I Wayan Sudika Jayaputra Jayaputra, Jayaputra Jufri, Afifah Farida Lalu Muhammad Sadam Husen Lalu Sulaiman Liana Suryaningsih B. M. Alif Pradipta Adji Maisopa, Ira Martia Dewi, Suprayanti Marzuki Marzuki Mastuty, Amalia Meidi Arisalwadi Muhammad Alif Pradipta Adji Muhammad Fathur Rouf Hasan Muhammad Sarjan Muliadi Muliadi Muwardi Sutasoma Nadia Isnawati Nihla Farida NOVITA HIDAYATUN NUFUS Novita Hidayatun Nufus Novita Hidayatun Nuvus Novita Hidayatun Nuvus Nurrachman Nurrachman Nurrachman Pratiwi, Dita Retno Putera Agung Maha Agung Putri, Dwi Noorma Raehanayati Raehanayati Reni Apriani Rizki, Al-Fajr Siska Ita Selvia Siska Ita Selvia SITI MARYAM Sitti Hilyana Sri Fitriani, Sri Sukir Maryanto Suliartini, Ni Wayan Sri Suprayanti Martia Dewi Suprayanti Martia Dewi Suprayanti Martia Dewi Suprayanti Martia Dewi, Suprayanti Martia Taufik Abdullah Utami, Dianti Suciati Vera Yulandasari Wayan Wangiyana Wiksuarini, Erwin Yuliana Asri Yuliana Asri Zubaidi, Akhmad Zuhdiyah Matienatul Iemaaniah