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All Journal Jurnal Kelautan Tropis Bulletin of Geology
Baraas, Abdillah
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Earth & Planetary Sciences Energy Engineering

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INTERPRETATION OF TECTONIC SETTING AND MAGMATISM FOR EDUCATION AND GEOTOURISM IN IJEN UNESCO GLOBAL GEOPARK, EAST JAVA, INDONESIA Baraas, Abdillah
Bulletin of Geology Vol 7 No 3 (2023): Bulletin of Geology
Publisher : Fakultas Ilmu dan Teknologi Kebumian (FITB), Institut Teknologi Bandung (ITB)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.5614/bull.geol.2023.7.3.4

Abstract

Indonesia's tectonic conditions are quite interesting, especially discussing about the boundary conditions of the western and eastern parts of Indonesia's tectonic areas which have very different characteristics. One of the things that results from tectonic activity is magmatism that produces volcanoes. The Sunda Arc in the western part of Indonesia is a subduction tectonic zone that produces arcvolcanoes. Oneof the volcanoes that grows in the areais the Ijen Volcano Complex which is in a very interesting position.It is located at the boundary or transition between the Sundalandpart in the west and the crust that thinner in the eastern part. Itsvolcanism is also quite interesting because it produces a caldera formed by an explosive eruption. The Ijen Complex grows on top of Tertiary sedimentary rocks. The magmatism is also affected by the assimilation process between sedimentary rocks and magma that comes from partial melting in the subduction zone. Knowledge regarding the interpretation of tectonic conditions and magmatism at Ijen is important as educational material. By studying the Ijen Volcano Complex, we can get data that the surface carried by magma rises and erupts so that we can obtain information about what is happening at the bottom beneath the surfacethere and its tectonic configuration.The results ofthis research are used for educational and geotourism activities in the Ijen Geopark area which are used to complete geological stories from existing sites. Key words: Interpretation, geopark, Ijen, volcano, geotourism
Species Diversity of Gastropods in the Mangrove Forest of Pangpang Bay Ijen Geopark, Banyuwangi Indonesia Setiawan, Rendy; Wimbaningrum, Retno; Sulistiyowati, Hari; Siddiq, Arif Mohammad; Rani, Cynthia; Baraas, Abdillah
Jurnal Kelautan Tropis Vol 27, No 2 (2024): JURNAL KELAUTAN TROPIS
Publisher : Universitas Diponegoro

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14710/jkt.v27i2.22471

Abstract

Gastropods are invertebrate animals from the phylum Mollusca which have soft bodies and most of them have shells. The Pangpang Bay mangrove forest has a muddy substrate type and contains a lot of organic matter as a food source. This research was conducted in October - December 2022 at the Pangpang Ijen Geopark Bay. The area of the research area is about 900 meters2 with a total plot size of 1x1 m totaling 99 plots. The gastropod data collection method uses the systematic plot transect method. The recorded data contains the local name/type/type code, the number of species, and the number of individuals of each type. Data on abiotic environmental factors which include temperature, pH, and salinity are determined by the range of values and the type of substrate. Further data analysis was carried out by determining the species composition of gastropods by calculating the Shannon-Wiener (H') species diversity index. The results showed that there were 20 types of gastropods with members from 11 genus and 7 families. The results showed that the gastropod diversity index at the study site is in the medium category with a value of 1.95. The conclusion of this study is the diversity of species found in the mangrove forest of Pangpang Ijen Geopark Bay as many as 20 species. The value of diversity of gastropod species in the Pangpang Ijen Geopark Bay mangrove forest is in the moderate category because there are quite a lot of species found and only one species dominates.
Co-Authors Arif Mohammad Siddiq Rani, Cynthia Rendy Setiawan Sulistiyowati, Hari Wimbaningrum, Retno