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All Journal POSITRON IJOG : Indonesian Journal on Geoscience JGE (Jurnal Geofisika Eksplorasi) Jurnal Geosaintek Jurnal Geocelebes Journal of Geoscience, Engineering, Environment, and Technology Indonesian Physical Review Indonesian Journal on Geoscience Indonesian Journal on Geoscience Jurnal Abdi Masyarakat Indonesia Jurnal Geosaintek Global Review of Tourism and Social Sciences
Santoso, Nono Agus
Geophysical Engineering, Institut Teknologi Sumatera; South Lampung, Indonesia
Humanities Decision Sciences, Operations Research & Management Earth & Planetary Sciences Economics, Econometrics & Finance Education Energy Engineering Environmental Science Physics Public Health Social Sciences

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Journal : Journal of Geoscience, Engineering, Environment, and Technology

 1 
Basaltic Lava Characteristic in Goa Pandan Area, Sukadana, East Lampung: Inferences from Stratigraphy and Petrography Analysis Happy Christin Natalia Sirait; Bilal Al Farishi; Nono Agus Santoso; Andreas Maruli Pakpahan; Hissy Ijitiha Sari; Angga Jati Widiyatama; Risky Martin Antosia
Journal of Geoscience, Engineering, Environment, and Technology Vol. 8 No. 2 (2023): JGEET Vol 08 No 02 : June (2023)
Publisher : UIR PRESS

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25299/jgeet.2023.8.2.12118

Abstract

The presence of extensive basalt formations in East Lampung has its own attractions in the field of geology, particularly the presence of Goa Pandan as a lava cave and tourist attraction in East Lampung. The presence of basalt lava in the southern part of the South Sumatra Basin has drawn attention to the presence of this lava, but detailed research on the characteristics of the lava and its formation process is still very rare. This study aims to determine the eruption period of the basalt lava and magma evolution process based on the correlation between lava stratigraphy and petrography analysis. Field observations show a lava sequence that forms Goa Pandan. Each lava sequence is characterized by autobreccia and vesicular structures on the surface. In addition, the presence of columnar joints, sheeting joints, massive lava, and other additional structures indicate the characteristics of low-viscosity basalt lava. The presence of mineral structures and abundance under the microscope clearly shows the magma formation process when basalt lava flowed on the surface. Resorption-overgrowth of plagioclase and pyroxene minerals indicates an open system when basalt lava flowed on the surface. In addition, the presence of zoning and patching in plagioclase minerals indicates that magma variability is influenced by temperature. The documentation of this lava stratigraphy can serve as a basis for further understanding of magma characteristics and formation processes. There is still much geological work that can be done in the research area to get a detailed picture of the evolution process of magma and the presence of basalt lava in this area.
Analysis of Subsidence Hazards in Pandan Cave Area, Giri Mulyo Village, Marga Sekampung District, East Lampung using Analytical Hierarchy Process Bilal Al Farishi; Natalia, Happy Christin; Naufal, Rifqi Andi; Aganda, Riyanto Dedinta; Octafiani, Aulia; Hita Kirana; Depri; Pakpahan, Andreas Maruli; Sari, Hissy Ijitiha; Santoso, Nono Agus; Antosia, Risky Martin; Putri, Intan Andriani
Journal of Geoscience, Engineering, Environment, and Technology Vol. 9 No. 2 (2024): JGEET Vol 09 No 02 : June (2024)
Publisher : UIR PRESS

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25299/jgeet.2024.9.2.16848

Abstract

Pandan Cave is a basalt lava cave which is a unique geological tourism area located in Giri Mulyo Village, Marga Sekampung District, East Lampung Regency, Lampung Province. This cave was formed when the lava flow cooled at the top because it was in contact with the cold atmosphere, while at the bottom it was still flowing. This uniqueness caused Pandan Cave to become one of the tourist attractions that was once crowded with tourists. However, the condition of this cave is still very natural which can lead to the risk of geological disasters such as subsidence which can endanger tourists, so it is necessary to research to minimize the occurrence of geological disasters in the area. This research was conducted by observing aerial photographs, collecting data directly in the field, and then processing it with the Analytical Hierarchy Process (AHP). Parameters used in this AHP method include lithology, vegetation, weathering, rock mass class, and cave roof thickness. The existence of subsidence in the study area is influenced by weathering (34%), vegetation (31%), thickness of the cave roof layer (16%), lithology (10%), and rock mass class (9%). Based on the overlay results for each parameter that has been weighted, the Pandan Cave tourism area is divided into three subsidence hazard zone classifications, that is low hazard zone with value of 0.28-0.44, medium hazard zone with range of 0.44-0.60, and high hazard zone with range of 0.60-0.75. Through the Analytical Hierarchy Process (AHP) method and overlay of each parameter used, the distribution of subsidence hazard zones in the study area was obtained.  The low threat zone of 27.57 ha is about 57.07% of the total research area, the medium threat zone is 15.86 ha or about 32.83% of the total research area, and the high threat zone is 4.88 ha or about 10. 10% of the total research area.
Co-Authors Aganda, Riyanto Dedinta Ahmad Zaenuddin Ahmad Zaenudin Akbar, Hendra Hidayat Al Farishi, Bilal Andreas Maruli Pakpahan Andri Yadi Paembonan Angga Jati Widiyatama Antosia, Risky Martin Bilal Al Farishi Depri Ekawati, Gestin Mey Faranabila, Syifa Farduwin, Alhada Farishi, Bilal Al Felik Destian Putra Amijaya Hissy Ijitiha Sari Hita Kirana Iqbal, Mochamad Irawati, Selvi Misnia Irwanto, Prastowo Adhi Junian, Wahyu Eko Kadja, Grandprix Thomryes Marth M Rafif Pascaloa Natalia, Happy Christin Naufal, Rifqi Andi Nugraha, Purwaditya Octafiani, Aulia Pakpahan, Andreas Maruli Pascaloa, M Rafif Prima, Gilbert Purwaditya Nugraha Putri, Intan Andriani Rahadian, Zatalini Syadni Ramayanti, Fitria Rendra Aditya Hakim Reza Rizki Rizki, Reza Ruhul Firdaus Sari, Hissy Ijitiha Susanti Alawiyah Syahidus Syuhada Virgian Rahmanda Wijayanti Ashuri