Jambura Geoscience Review
ISSN / EISSN : 26230682 / 26560380
Current Publisher: Department of Earth Science and Technology, Universitas Negeri Gorontalo (10.34312)
Total articles ≅ 5
Articles in this journal
Published: 31 January 2019
Jambura Geoscience Review, Volume 1; doi:10.34312/jgeosrev.v1i1.2035
Abstract:Geothermal is associated with volcanic that still has heat energy below the surface. Indonesia is a country with geothermal energy reserves of around 40%. There are 256 potential geothermal areas and only 7 locations have been utilized. Gorontalo has several geothermal manifestations, such as Lombongo, Pangi, Libungo, and Hungayono. The purpose of this study was to study the geology of the geothermal manifestations of Pangi, East Suwawa District, Bone Bolango Regency, Gorontalo Province. The research method is divided into field observations, laboratory analysis, and studio analysis. The results of this research show that the geomorphology in the study area is divided into 3 units, namely the Fluvial Plain, the Volcanic Hills, and the Structural Use Landscape. Alluvial Deposition Unit, Volcanic Breccia Unit, Tuff Lapili Unit, Andesite Unit, Granodiorite Unit, and Porphyry Diorite Unit.
Published: 31 January 2019
Jambura Geoscience Review, Volume 1; doi:10.34312/jgeosrev.v1i1.2036
Abstract:The research aimed to investigate the maritime tourism potential of Langala Beach. The research was conducted in Dulupi Sub-District, Boalemo Regency, Gorontalo Province. The geographical location of the research area is 000 30’ 04 "LU – 1220 29' 11" BT. Data is collected from primary sources and secondary sources. The research uses the triangulation data collection technique, which combines various techniques and data sources. The methods used in this study are survey methods, conformity analysis, in-depth interviews, and regional mapping. The data analysis technique focuses on the percentage assessment of tourism suitability using a marine tourism suitability index analysis for snorkeling and diving, a tourist suitability index analysis for swimming and canoeing, data analysis using the percentage of coral cover per lifeform category for the status of coral reefs. The results of the Langala Beach tourism research for marine tourism (snorkeling and diving) category included in the appropriate category (S2) with a percentage of 80.45% suitability, Langala Beach area for marine tourism category (swimming and canoeing) included in the very appropriate category (S1) with a percentage of suitability level of 93.57%. The condition of coral reefs in the research location, namely station 1, is in the good category with a value of 37.12%, Station 2 and 3 in the medium category with a value of 52.32% and 36.34%.
Published: 30 January 2019
Jambura Geoscience Review, Volume 1; doi:10.34312/jgeosrev.v1i1.2034
Abstract:Administratively, the research area covers two districts, Wonosari Sub-district and Dulupi Sub-district, Boalemo District, Gorontalo Province. Based on the physiography of the Gorontalo region, the research area which is included in the southern mountain zone of Bone-Tilamuta-Modello generally consists of ancient volcano-sedimentary rock formations in Gorontalo, the Eocene-Oligocene. The purpose of this geological research is to discover the geological order that developed in the area of Dimito and surrounding are as covering several aspect such as geomorphology, stratigraphy, geological structure, and geological history. The result shows that the geomorphology of the research area divided into three geomorphic units, namely the units of the Alluvial Plain, Volcanic Hills, and Denudasional Hills. Stratigraphy of the research area divided into five types of units sorted from the early Miocene to the Holocene, i.e., Lava Basal Dimito (Early Eocene), Wackestone Dimito (Early Eocene), Andesit Kalidingin (Middle Miocene), Granodiorite Bualo (Middle Pliocene), and Alluvial Buaolo (Recen). Geological structures that work on the location of the research area relatively trend from northeast-southwest to northwest-southeast. Fault working on the location of the research area from the data processing consists of Normal Left Slip Fault Kalidingin and Lag Left Slip Fault Bualo.
Published: 29 January 2019
Jambura Geoscience Review, Volume 1; doi:10.34312/jgeosrev.v1i1.2015
Abstract:This study was encouraged by the importance of understanding the conditions of seagrass which becomes the source of food for many species of marine fish. Seagrass condition will indirectly affect the quantity and quality of fish obtained by fishermen who live in coastal areas. High-resolution imagery can simplify and accelerate data collection process of conditions of seagrass on the outer islands of Gorontalo Province. This study used digital remote sensing method using unsupervised classification and also assisted by the measurements of the transcule based on the pixel size that aims to detect and to match the information obtained from QuickBird imagery, to ultimately obtain information about seagrass condition. Seagrass with abundant/good condition can be found at station 1,3,4,5, and 6 with an average cover up to 67,70%, 63,54%, 68,75%, 62,5%, and 65,62% respectively. Meanwhile, seagrass with the less abundant/poor condition can be found at station 2 with an average cover up to 50% and at station 7 with an average cover up to 52,08%. Distribution of seagrass on Saronde Island covers up to 6. 9654 Ha. Seagrass with abundant/good condition covers 4,2025 Ha, and lowly abundant/poor seagrass covers 2,7629 Ha. Seagrass on Saronde Island is still in abundant/good condition with an average cover up to 61,45 % and form mixed vegetation.
Published: 29 January 2019
Jambura Geoscience Review, Volume 1; doi:10.34312/jgeosrev.v1i1.2018
Abstract:Gorontalo is located at the macro and micro plate boundary, therefore it is located in an active seismotectonic region. This study aims to analyze earthquake damage level in Gorontalo based on seismicity and peak ground acceleration. The data used is obtained from the USGS. Data is made into a database and plotted onto a geological map. Calculation of peak ground acceleration is obtained using the Kawashumi formula. The results of this study indicate that Gorontalo is included in the slight to moderate earthquake damage level because it is dominated by shallow to intermediate earthquake’s depth, light to moderate earthquake magnitude, and have a peak ground acceleration 1,462 - 99,714 gal.