cover
Article Per Year (5 Year)
All
Home Page
OAI Link
Editorial Team
Contact
Reviewer
Google Scholar
Contact Name
-
Contact Email
-
Phone
-
Journal Mail Official
-
Editorial Address
-
Location
Unknown,
Unknown
INDONESIA
BULLETIN OF THE MARINE GEOLOGY
Published by Marine Geological Institute of Indonesia
ISSN : 14106175     EISSN : 25278843     DOI : -
Core Subject : Science,
Earth & Planetary Sciences
Bulletin of the Marine Geology is a scientific journal of Marine geoscience that is published periodically, twice a year (June and December). The publication identification could be recognized on the ISSN 1410-6175 (print) and e-ISSN: 2527-8843 (on-line) twice a year (June & December) and it has been accredited by Lembaga Ilmu Pengetahuan Indonesia (Indonesian Institute of Sciences) by Decree Number: 818/E/2015. As an open access journal, thus all content are freely available without any charge to the user. Users are allowed to download, and distribute the full texts of the articles without permission from the publisher.
Arjuna Subject : -
Articles 5 Documents
 1 
Search results for , issue "Vol 40, No 2 (2025)" : 5 Documents clear
IDENTIFICATION OF EARTHQUAKE AND TSUNAMI RISK ZONES IN SOUTHERN JAVA USING GRAVITY METHOD Karima, Isna; Martha, Agustya Adi; Hudayat, Nurul; Zera, Tati
BULLETIN OF THE MARINE GEOLOGY Vol 40, No 2 (2025)
Publisher : Marine Geological Institute of Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32693/bomg.40.2.2025.934

Abstract

The southern part of Java has a high level of disaster risk because it is affected by a subduction zone where the Indo-Australian plate thrusts beneath the Eurasian plate. Six tsunami events occurred in the southern part of Java, caused by earthquakes in the area, based on BMKG catalogue data from 416 to 2023. Given the very large population on the island of Java, the possibility of causing more casualties is greater. Therefore, it is very necessary to have thorough mitigation preparation to estimate the possibility of areas experiencing a large earthquake that triggers a tsunami. This study aims to determine areas with a high level of earthquake and tsunami risk distribution using the gravity method with data from the TOPEX satellite in the form of free air anomaly data and topographic data. After data processing and an anomaly map were obtained, it showed that areas with a high level of earthquake risk were located around the subduction zone and Java Trench. This is due to the geological conditions of the southern part of Java, located in the subduction zone where many active faults were found.
GEOCHEMISTRY OF SEABED AND COASTAL SEDIMENTS IN LIMAU WATERS AREA Zulfikar, Muhammad; Saputro, Eko; Albab, Ali; Rahardiawan, Riza
BULLETIN OF THE MARINE GEOLOGY Vol 40, No 2 (2025)
Publisher : Marine Geological Institute of Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32693/bomg.40.2.2025.953

Abstract

Sediment provenance and weathering history are used to understand sedimentary processes and to explore mineral potential in coastal–marine systems in the Limau Waters. Therefore, the characteristics of seabed and coastal sediments need to be determined. This study aims to identify the source rocks, paleoweathering signatures, and sediment maturity of both seabed and coastal sediments through a geochemical approach. A geochemical approach that integrates major oxide and rare earth element (REE) analyses, the paleoweathering, and sediment maturity indices, is used to identify the source rocks of these sediments. Major oxides elements were measured using X-ray fluorescence (XRF) and REE concentrations were determined using inductively coupled plasma - optical emission spectrometry (ICP-OES) and inductively coupled plasma optical - mass spectrometry (ICP-MS). Geochemical discrimination diagrams indicate that seabed sediments are mainly derived from intermediate to felsic igneous rocks with higher compositional maturity, whereas coastal sediments are influenced by mafic volcanic rocks and are comparatively immature in composition. Both sediment types exhibit weak chemical weathering (CIA < 70), suggesting limited alteration of young volcanic sources. The CIA–ICV relationships portray contrast sediment transport and depositional processes between the coastal and marine environments. This study is expected to provide a geochemical-based framework for provenance analysis and to support the development of insights for future marine mineral exploration in the Limau Waters area.
FORAMINIFERA DISTRIBUTION AS AN INDICATOR OF PALEOCEANOGRAPHY IN WAIPOGA WATERS, NORTHERN PAPUA Wijaya, Joleen Felicia; Jatiningrum, Resti Samyati; Gustiantini, Luli; Putri, Mardhatillah Kurnia; Firdaus, Yulinar
BULLETIN OF THE MARINE GEOLOGY Vol 40, No 2 (2025)
Publisher : Marine Geological Institute of Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32693/bomg.40.2.2025.965

Abstract

Foraminifera are widely used as indicators for reconstructing past marine environmental conditions. This study aims to investigate the ecological conditions of Waipoga waters, North Papua, by analyzing the distribution of foraminifera during the late Middle Holocene to Late Holocene. The study area plays an important role in the dynamics of the Indonesian Throughflow (ITF/ITF) and ENSO. Sediment core samples were prepared and identified for foraminifera, followed by quantitative analyses including relative abundance, P/B ratio, and ecological indices. In addition, sortable silt analysis was applied as an environmental proxy to support the reconstruction of past environmental changes. The results show that foraminiferal abundance throughout the sediment core varies. Planktonic foraminifera are more dominant, comprising 12 genera with 22 species. The most dominant species are Globigerinoides ruber (41,7%), Neogloboquadrina dutertrei (11%), Neogloboquadrina incompta (13,2%), Pulleniatina obliquiloculata (4%), Hastigerina pelagica (6,65%), and Globigerinoides immaturus (6,7%). Meanwhile, benthic foraminifera consist of 42 genera with 62 species, dominated by Bulimina marginata (1,8%), Cibicidoides pachyderma (1,89%), and Lenticulina calcar (1,3%). During the late Middle Holocene to Late Holocene, the Waipoga waters were influenced by variations in bottom current intensity and thermocline stability. Zones I and III reflect oligotrophic conditions with weak circulation, while Zone II indicates increased bottom current intensity, high productivity, and dysoxic conditions, suggesting possible intensification of upwelling events.
HYDROCARBON POTENTIAL OF THE OFFSHORE AKIMEUGAH BASIN FROM MESOZOIC-PALEOZOIC BASED ON GEOLOGICAL AND GEOPHYSICAL ANALYSIS Setiadi, Imam; Rasyid, Faris N; Zulivandama, Shaska Ramadhan; Firdaus, Yulinar; Santy, Lauty D.; Saleh, Hanif M.; Rachman, Muhammad G.; Djaja, Andrian W.; Nurdin, Nazar; Rahardiawan, Riza; Subarsyah, Subarsyah
BULLETIN OF THE MARINE GEOLOGY Vol 40, No 2 (2025)
Publisher : Marine Geological Institute of Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32693/bomg.40.2.2025.954

Abstract

Akimeugah Basin is one of the basins with discovery status, however hydrocarbon production has not yet been established. One of potential petroleum play type for further investigation, estimated to contain hydrocarbon reserves in the offshore Akimeugah Basin, is the Mesozoic–Paleozoic sedimentary play, interpreted to have originated from the Australian passive margin. This study aims to analyze geological and geophysical data to delineate the sub-basin pattern and characterize petroleum system elements. The analysis integrates gravity data interpretation, geochemical evaluation of source rocks, and subsurface interpretation based on seismic and well data. Results indicate that source rocks in the Kola-1 well are primarily composed of Type III (gas-prone) and secondarily of Type II (oil/gas-prone) kerogen. Thermal maturity analysis shows that the Woniwogi, Aiduna, and Modio Formations have reached the oil window. Reservoir potential has been identified in the Tipuma Formation (Triassic), Aiduna Formation (Permian), and Modio Dolomite (Devonian–Silurian). Seal rocks consist of regional and intraformational units composed of tight siltstone and shale. Trapping mechanisms in this area include a combination of structural traps such as fault-bounded anticlines and stratigraphic traps represented by sub-unconformities. Identified exploration leads include seven within the Modio Dolomite structural play, six within the Permian Aiduna Sandstone play, and four within the Triassic Tipuma Sandstone play.
ACOUSTIC FACIES AROUND THE INTRUSIVE COMPLEX OF SALAHNAMA AND PANDANG ISLANDS, MALACCA STRAIT , S.Si., MT., Subarsyah; Albab, Ali; Zulivandama, Shaska Ramdhan; Saputro, Eko; Ali, Arif; Setiadi, Imam; Zulfikar, Muhammad; Nauval, Faris; Rahardiawan, Riza
BULLETIN OF THE MARINE GEOLOGY Vol 40, No 2 (2025)
Publisher : Marine Geological Institute of Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32693/bomg.40.2.2025.938

Abstract

Salahnama and Pandang Islands lie on the main range of the granite province; both islands are located in the Sunda Shelf, Malacca Straits. These islands are composed of intrusive rocks from Berhala. The rock’s existence will offer a significant contribution to the distribution of surface sediments in the surroundings. The sea dynamics and the geometry of the Malacca Strait will also have an impact on the seabed. Apart from that, global factors such as sea level changes will lead to transformation of the depositional environment and subsurface geology in the strait. Geological conditions of the seabed surface and subsurface can be understood and interpreted based on the acoustic characteristics and reflector patterns of a seismic section. Then, based on the acoustic character and reflector pattern, an acoustic facies can be defined. Seismic data measurements have been carried out around Salahnama and Pandang Islands in 2024. Based on the results of the seismic section, the acoustic facies in the study area are classified into 6 (six), which include AF I – AF VI. Seabed morphological features in the form of sand dunes were identified in the first acoustic facies (AF I); this feature is formed due to geometric aspects, surface currents, and bottom current's which may or may not be triggered by tidal vortices. Acoustic Facies II (AF II) is characterized by sandwave or ripple marks formed by strong seabed currents. AF III was formed after the Last Glacial Maximum (LGM) ended and the depositional environment returned to a shallow marine environment, characterized by a transparent pattern in the seismic section. The erosional truncation at the upper boundary of AF IV indicates a change in the depositional environment from shallow marine to coastal or terrestrial environments during the Last Glacial Maximum period. AF V is acoustic bedrock, and AF VI is characterized by a chaotic pattern, which is interpreted as granitic intrusive rocks.

Page 1 of 1 | Total Record : 5

 1 

Filter by Year

2025 2025


Reset
Filter By Issues
All Issue Vol 40, No 2 (2025) Vol 40, No 1 (2025) Vol 39, No 2 (2024) Vol 39, No 1 (2024) Vol 38, No 2 (2023) Vol 38, No 1 (2023) Vol 37, No 2 (2022) Vol 37, No 1 (2022) Vol 36, No 2 (2021) Vol 36, No 1 (2021) Vol 35, No 2 (2020) Vol 35, No 1 (2020) Vol 34, No 2 (2019) Vol 34, No 1 (2019) Vol 33, No 2 (2018) Vol 33, No 1 (2018) Vol 32, No 2 (2017) Vol 32, No 1 (2017) Vol 31, No 2 (2016) Vol 31, No 1 (2016) Vol 30, No 2 (2015) Vol 30, No 1 (2015) Vol 29, No 2 (2014) Vol 29, No 1 (2014) Vol 28, No 2 (2013) Vol 28, No 1 (2013) Vol 27, No 2 (2012) Vol 27, No 1 (2012) Vol 26, No 2 (2011) Vol 26, No 1 (2011) Vol 25, No 2 (2010) Vol 25, No 1 (2010) Vol 24, No 2 (2009) Vol 24, No 1 (2009) Vol 23, No 1 (2008) Vol 22, No 1 (2007) More Issue