cover
Article Per Year (5 Year)
All
Home Page
OAI Link
Editorial Team
Contact
Reviewer
Google Scholar
Contact Name
Ivan Ferdian
Contact Email
ivan.ijgbg@gmail.com
Phone
-
Journal Mail Official
ivan.ijgbg@gmail.com
Editorial Address
-
Location
Kota bandung,
Jawa barat
INDONESIA
IJOG : Indonesian Journal on Geoscience
Published by Geological Agency of Indonesia
ISSN : 23559314     EISSN : 23559306     DOI : -
Core Subject : Science,
Earth & Planetary Sciences
The spirit to improve the journal to be more credible is increasing, and in 2012 it invited earth scientists in East and Southeast Asia as well as some western countries to join the journal for the editor positions in the Indonesia Journal of Geology. This is also to realize our present goal to internationalize the journal, The Indonesian Journal on Geoscience, which is open for papers of geology, geophysics, geochemistry, geodetics, geography, and soil science. This new born journal is expected to be published three times a year. As an international publication, of course it must all be written in an international language, in this case English. This adds difficulties to the effort to obtain good papers in English to publish although the credit points that an author will get are much higher.
Arjuna Subject : -
Articles 813 Documents
 78   79   80   81   82 
High-Temperature Hydrothermal Fe-Ti Oxide Mineralization in The Arızlı Ophiolitic Mélange, Western Anatolia CİHAN YALÇIN; Adil Ozdemir
Indonesian Journal on Geoscience Vol. 13 No. 3 (2026)
Publisher : Geological Agency

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.17014/ijog.13.3.355-372

Abstract

The Arızlı Ophiolitic Complex in western Anatolia provides a distinctive geological context for comprehending Fe-Ti oxide mineralization processes in ophiolitic settings. This research examines the geochemical and mineralogical properties of Fe-Ti oxides using extensive fieldwork and laboratory investigations, including X-ray fluorescence spectrometry (XRF), inductively coupled plasma mass spectrometry (ICP-MS), and X-ray diffraction (XRD). Ten samples were obtained from ultramafic and mafic rocks, displaying notable mineralization characteristics. The geochemical investigations indicated Fe₂O₃ concentrations between 10.52 % and 19.93 %, with TiO₂ contents ranging from 2.17 % to 13.63 %, suggesting hydrothermal and metasomatic processes. Discriminant diagrams, including Si-Al, Fe/Ti-Al/(Al+Fe+Mn), and Fe-Six2-Mn, validated the hydrothermal genesis of the deposit, supplemented by volcano-sedimentary processes Elevated Fe/Ti ratios and the clustering of samples within high-temperature hydrothermal domains (~300-500° C) suggest that hydrothermal fluids and metasomatic overprinting played a significant role in the formation of Fe-Ti oxide mineralization. A comparative analysis with other ophiolitic complexes, such as the Oman and Pindos ophiolites, underscores both common mineralogical-geochemical traits and unique attributes of Tthe Arızlı Ccomplex, notably its comparatively elevated aluminium enrichment. This work examines critical deficiencies in comprehending the genetic regulations and structural impacts on Fe-Ti oxide mineralization in ophiolitic environments. The findings offer a valuable foundation for subsequent research and resource evaluations, enhancing regional metallogenic models of hydrothermal Fe-Ti mineralization in ophiolitic environments.
Full Waveform Inversion (FWI) in 3D Synthetic Geological Modelling Indriati Retno Palupi; Wiji Raharjo; Oktavia Dewi Alfiani
Indonesian Journal on Geoscience Vol. 13 No. 2 (2026)
Publisher : Geological Agency

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.17014/ijog.13.2.189-197

Abstract

Modeling the Earth's subsurface is important in geophysics, for example, tomography and Full Waveform Inversion (FWI). Especially for FWI, it is a method in the geophysical field that is used to describe the subsurface with a high-resolution image by utilizing all parts of observation data (seismic traces) based on a velocity model. In this paper, the 3D synthetic geological modelling was generated as an initial model; then, based on it, seismic traces and also shot gathers were simulated by arranging sources and geophones, and finally, the FWI was done. After seismic traces (assumed as acoustic wave equations), complete with the smoothness, were obtained, then a hyperbolic partial differential equation between the time and space domains was applied before entering the inversion process. During the inversion process, the final seismic traces were obtained by velocity updating in the entire space and time until they reached zero misfit, so wave propagation and the final velocity model could be observed. The pattern changes of seismic traces, shot gather, wave propagation, and FWI could be described by modifying the seismic source and geophone location in the geological model. However, by generating a 3D synthetic geological model, there is much flexibility for getting various descriptions of acoustic wave simulations.
Creep-Overpressure Coupling in The Onshore of Northeast Java Basin: Structural and Field-Based Geological Constraints Eri S. Sitinjak; Benyamin Sapiie; Agus M. Ramdhan
Indonesian Journal on Geoscience Vol. 13 No. 2 (2026)
Publisher : Geological Agency

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.17014/ijog.13.2.269-296

Abstract

The onshore Northeast Java Basin is one of the most important oil and gas basins in Indonesia. The active Kendeng Fault plays a significant role in hydrocarbon generation and earthquake activity in the region. Studying the Kendeng Fault activity and its relationship with overpressure and earthquake potential could improve oil and gas exploration activities as well as natural disaster mitigation efforts in the onshore areas of the Northeast Java Basin. Therefore, this research focuses on surface geological mapping and laboratory analysis of field samples. Fault creep in the onshore of the Northeast Java Basin has not been studied continuously. Active mud volcanoes, which result from subsurface overpressure, may influence the creep rate and activity of Kendeng Fault segments. The Kendeng Fault meets the criteria of a creeping fault due to its geology, subsurface overpressure conditions, and geometry. Manifestations of creep near fault planes are clearly visible through geological phenomena such as landslides or physical changes in buildings. The Central Java morphology (Grobogan area) is rougher than The East Java morphology (Surabaya area), which suggests a possible difference in creep rate. The focal mechanism of recent earthquakes in the Kendeng Fault Zone indicates strike-slip or thrust faulting. The Central Java Fault segment exhibits a faster creep rate than the East Java Fault segment. This is evident through swarms of earthquakes at Gunung Pandan and Rawa Bening. Elemental analysis of the fluid and mud, combined with gas analysis of all the mud volcanoes in the studied area, shows a positive correlation between possible halide minerals (Na, Mg, Ca, K, and Cl) and gas content (N₂ and O₂/Ar). There is also a slight relationship between these gas and fluid elements (R²). These parameters increase from the mud volcanoes in East Java to those in Central Java. CO₂ shows a negative correlation (r) and a slightly stronger relationship (R²) with CH₄. The mud volcanoes in Central Java are dominated by CO2, which may originate from volcanic activity in a deeper reservoir as a result of tectonic activity in the region. In contrast, the mud volcanoes in East Java are dominated by CH₄, which may originate from a highly overpressured hydrocarbon reservoir in a shallower area due to a high sedimentation rate. The very high sedimentation rate influences the slow-creeping fault segment in East Java (the Surabaya region) due to overpressure. Conversely, the faster creeping fault segment in Central Java (the Grobogan and Kesongo areas) may be influenced by volcanism due to tectonic activity in the region. These findings require further study, particularly the relationship of overpressure in each Kendeng Fault segment. The results will be useful for hydrocarbon exploration activities in the region as well as for natural disaster mitigation in general.

Page 82 of 82 | Total Record : 813

 78   79   80   81   82 

Filter by Year

2006 2026


Reset
Filter By Issues
All Issue Vol. 13 No. 3 (2026) Vol. 13 No. 2 (2026) Vol. 13 No. 1 (2026) Vol. 12 No. 3 (2025) Vol. 12 No. 2 (2025) Vol. 12 No. 1 (2025) Vol. 11 No. 3 (2024) Vol. 11 No. 2 (2024) Vol. 11 No. 1 (2024) Vol. 10 No. 3 (2023) Vol. 10 No. 2 (2023) Vol 10, No 2 (2023): in-press Vol. 10 No. 1 (2023) Vol 10, No 1 (2023) Vol. 9 No. 3 (2022) Vol 9, No 3 (2022) Vol 9, No 2 (2022) Vol. 9 No. 2 (2022) Vol. 9 No. 1 (2022) Vol 9, No 1 (2022) Vol 8, No 3 (2021) Vol. 8 No. 3 (2021) Vol 8, No 2 (2021) Vol. 8 No. 2 (2021) Vol 8, No 1 (2021) Vol. 8 No. 1 (2021) Vol 7, No 3 (2020) Vol 7, No 2 (2020) Vol 7, No 1 (2020) Vol 6, No 3 (2019) Vol 6, No 3 (2019): in-press Vol 6, No 2 (2019) Vol 6, No 2 (2019) Vol 6, No 1 (2019) Vol 6, No 1 (2019) Vol 5, No 3 (2018) Vol 5, No 3 (2018) Vol 5, No 2 (2018) Vol 5, No 2 (2018) Vol 5, No 1 (2018) Vol. 5 No. 1 (2018) Vol 5, No 1 (2018) Vol 4, No 3 (2017) Vol 4, No 3 (2017) Vol 4, No 2 (2017) Vol 4, No 2 (2017) Vol 4, No 1 (2017) Vol 4, No 1 (2017) Vol 3, No 3 (2016) Vol 3, No 3 (2016) Vol 3, No 2 (2016) Vol 3, No 2 (2016) Vol 3, No 1 (2016) Vol 3, No 1 (2016): in-press Vol 2, No 3 (2015) Vol 2, No 3 (2015) Vol 2, No 2 (2015) Vol 2, No 2 (2015) Vol 2, No 1 (2015) Vol 2, No 1 (2015) Vol 1, No 3 (2014) Vol 1, No 3 (2014) Vol 1, No 2 (2014) Vol 1, No 2 (2014) Vol 1, No 1 (2014) Vol 1, No 1 (2014) Vol 8, No 4 (2013) Vol 8, No 4 (2013) Vol 8, No 3 (2013) Vol 8, No 3 (2013) Vol 8, No 2 (2013) Vol 8, No 2 (2013) Vol 8, No 1 (2013) Vol 8, No 1 (2013) Vol 7, No 4 (2012) Vol 7, No 4 (2012) Vol 7, No 3 (2012) Vol 7, No 3 (2012) Vol 7, No 2 (2012) Vol 7, No 2 (2012) Vol 7, No 1 (2012) Vol 7, No 1 (2012) Vol 6, No 4 (2011) Vol 6, No 4 (2011) Vol 6, No 3 (2011) Vol 6, No 3 (2011) Vol 6, No 2 (2011) Vol 6, No 2 (2011) Vol 6, No 1 (2011) Vol 6, No 1 (2011) Vol 5, No 4 (2010) Vol 5, No 4 (2010) Vol 5, No 3 (2010) Vol 5, No 3 (2010) Vol 5, No 2 (2010) Vol 5, No 2 (2010) Vol 5, No 1 (2010) Vol 5, No 1 (2010) Vol 4, No 4 (2009) Vol 4, No 4 (2009) Vol 4, No 3 (2009) Vol 4, No 3 (2009) Vol 4, No 2 (2009) Vol 4, No 2 (2009) Vol 4, No 1 (2009) Vol 4, No 1 (2009) Vol 3, No 4 (2008) Vol 3, No 4 (2008) Vol 3, No 3 (2008) Vol 3, No 3 (2008) Vol 3, No 2 (2008) Vol 3, No 2 (2008) Vol 3, No 1 (2008) Vol 3, No 1 (2008) Vol 2, No 4 (2007) Vol 2, No 4 (2007) Vol 2, No 3 (2007) Vol 2, No 3 (2007) Vol 2, No 2 (2007) Vol 2, No 2 (2007) Vol 2, No 1 (2007) Vol 2, No 1 (2007) Vol 1, No 4 (2006) Vol 1, No 4 (2006) Vol 1, No 3 (2006) Vol 1, No 3 (2006) Vol 1, No 2 (2006) Vol 1, No 2 (2006) Vol 1, No 1 (2006) Vol 1, No 1 (2006) More Issue