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

Efforts on Geological Conservation to Watuadeg-Basalt Pillow Lavas at West Sumber, Berbah District, Sleman Regency, Yogyakarta Special Region-Indonesia Faizal, Mohamad; Arisandy, Rydo Faisal; Tatawu, Ariel l Afrandi; Wijaksono, Shandi Hargian; Alansa, Frando Ryan; Arifin, Muhammad Nur; Mulyaningsih, Sri
Journal of Geoscience, Engineering, Environment, and Technology Vol 3 No 3 (2018): JGEET Vol 03 No 03 : September (2018)
Publisher : UIR PRESS

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (1352.764 KB) | DOI: 10.24273/jgeet.2018.3.3.2035

Abstract

Site of Berbah pillow lavas is an important geological heritage that is currently as one of the main tourism destination area located in Yogyakarta Special Region, Indonesia. It has a unique appearence of pillow structures with diameters of 0.5-1.0 m and the flow length of 2-5m. This site is used to visited by students and earth researchers becouse of its unique geological history. This study was approached with geotourism and geoconservation points of view. The research method uses qualitatively field geological observations. Data analysis was carried out by assessing the feasibility study of the geological conditions that had been produced in relation to the development of educational toursm. In its condition, this site suffered damage to the development impacts in the surrounding area and was once an object of agate mining so that its condition was increasingly not maintained. In order to maintain this site and become a protected geological site, there must be seriousness of various parties in an effort to map the geological conditions of the pillow lava complex, an important role that geologists have to inform and disseminate to all stakeholders and local residents to be able to independently manage the potential of geotourism. In addition, it also needs the commitment of the local government in protecting the pillow lava object and fighting for it to become a protected geological reserve.
Efforts on Geological Conservation to Watuadeg-Basalt Pillow Lavas at West Sumber, Berbah District, Sleman Regency, Yogyakarta Special Region-Indonesia Mohamad Faizal; Rydo Faisal Arisandy; Ariel l Afrandi Tatawu; Shandi Hargian Wijaksono; Frando Ryan Alansa; Muhammad Nur Arifin; Sri Mulyaningsih
Journal of Geoscience, Engineering, Environment, and Technology Vol. 3 No. 3 (2018): JGEET Vol 03 No 03 : September (2018)
Publisher : UIR PRESS

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (1352.764 KB) | DOI: 10.24273/jgeet.2018.3.3.2035

Abstract

Site of Berbah pillow lavas is an important geological heritage that is currently as one of the main tourism destination area located in Yogyakarta Special Region, Indonesia. It has a unique appearence of pillow structures with diameters of 0.5-1.0 m and the flow length of 2-5m. This site is used to visited by students and earth researchers becouse of its unique geological history. This study was approached with geotourism and geoconservation points of view. The research method uses qualitatively field geological observations. Data analysis was carried out by assessing the feasibility study of the geological conditions that had been produced in relation to the development of educational toursm. In its condition, this site suffered damage to the development impacts in the surrounding area and was once an object of agate mining so that its condition was increasingly not maintained. In order to maintain this site and become a protected geological site, there must be seriousness of various parties in an effort to map the geological conditions of the pillow lava complex, an important role that geologists have to inform and disseminate to all stakeholders and local residents to be able to independently manage the potential of geotourism. In addition, it also needs the commitment of the local government in protecting the pillow lava object and fighting for it to become a protected geological reserve.
Hydrothermal Alteration and Ore Metal Mineralisation at Temon, Pacitan, East Jawa, Indonesia. Sri Mulyaningsih; Yoyok Ragowo Siswomijoyo Sukisman; Radhitya Adzan Hidayah
Journal of Geoscience, Engineering, Environment, and Technology Vol. 6 No. 1 (2021): JGEET Vol 06 No 01 : March (2021)
Publisher : UIR PRESS

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25299/jgeet.2021.6.1.6368

Abstract

Pacitan area is known as Tertiary volcanic arc in Java, as the result of subduction zone of the Indian-Australian Plate beneath the Eurasian Plate since Oligocene. It was superimposed volcanism which formed a wide area of hydrothermal alteration zone, resulting potential ore metals mineralization, such at Temon and its vicinities, Pacitan Regency, East Java Province, Indonesia. The aim of study was to analyze hydrothermal alteration and ore metal mineralization zones. Method was surface mapping, thin section analyses, mineragraphic analyses and X-Ray Diffraction (XRD) analyses. Field study observed denuded and deformed volcanic crater geomorphology. There are ore placer deposits within the sand dunes of Grindulu River, which it consists of andesitic lava and breccia of Early Oligocene Mandalika Formation; Early Miocene lithic and vitric tuffs; and dacitic intrusion. The dikes of dacite as the last of volcanism was the host rock controlling the zonation of alteration and mineralization stages. Oblique normal faults and shear faults were cross over dilating formed fractures, which were as bodies to depositing the ore metals. There are (zone 1st) the argillic clay consists of quartz+alunite+dickite+kaolinite±illite with vuggy structures, (zone 2nd) the argillic clay consists of quartz+montmorillonite±illite zone with quartz vents, brecciated and sulfide massive, and (zone 3rd) as the chloritized zone with low grade and supergene on the edge of hydrothermal alteration. It was fluid overprinted that very acid to the core of zone 1st (pH2-4) into more netral pH 4-6 (zone 2nd) and (pH5-6) in the edge zone 3rd. The potentials ore metal mineralization are Fe and Cu by pyrite, chalcopyrite, hematite, and covellite. Other potential ore metal mineralization was also from enargite by the supergene alteration.
The Petrology and Volcano-Stratigraphy of The Muria-Peninsula High-K Volcanic Rocks, Central Java, Indonesia Sri Mulyaningsih; Sutikno Bronto; Arie Kusniadi; Lilis Apriyanti; L. Budiyanto; Danis Agoes Wiloso
Journal of Geoscience, Engineering, Environment, and Technology Vol. 7 No. 2 (2022): JGEET Vol 07 No 02 : June (2022)
Publisher : UIR PRESS

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25299/jgeet.2022.7.2.9602

Abstract

The Muria-Peninsula is a Quaternary volcano located in the northern Sunda arc. Its activity was controlled under high potassic and very high potassic magma series resulting in leucite-rich trachyte and pyroxene-rich basaltic-andesite. It is a strato-type volcano that is composed of lava, breccia, and tuff layers, and some dikes have some volcanic craters and maars varying in age and composition. The study area is covering the volcanoes of Muria, Genuk, and Patiayam. This paper aims to describe the petrology, mineralogy, and volcano-stratigraphy of the different volcanic materials. The data and materials were sourced from the primary and secondary data. The methods are field mapping, stratigraphy measurements, collecting samples, thin section analyses, and major element geochemistry using X-Ray fluorescence (XRF). The results describe two groups of volcanic rocks consisting of pyroxene-rich andesitic-basaltic volcanic materials and leucite-rich trachytic volcanic materials. Augite presents in the andesitic basalt together with small grains of olivine and a few anorthite and foid minerals. Aegirine (Na-Pyroxene) is present in the leucite-rich trachyte that is often associated with biotite and hornblende. Na-Ca Plagioclase such as labradorite-andesine is often present in the basaltic-trachy-andesite that is usually rarely leucite. The major elements show high-K volcanic rocks with % K2O is 4-5.9% and very high-K volcanic rocks (with % K2O is between 6-8.24%) and low-K volcanic rocks that contain % K2O is 2-3,9%. There are two groups of high-K to very high-K volcanic materials consisting of silicic-rich volcanic materials (~57-64% of SiO2) and low-silicic volcanic materials (~46-50%). The TAS diagram identifies tephrite, phonolite, and trachyte. Stratigraphic data identifies calcareous sediments of the Bulu Formation as the basement rocks of the Muria trachyandesite. Beds of pumice-rich volcanic breccia of the Ujungwatu Formation are the basement rocks of the basanite-tephrite of the Genuk Volcano, and the tuff of the Ujungwatu is also exposed consisting of the basanite-tephritic-phonolite of the Patiayam Volcano. The leucite-like feldspars are very common in the andesite lava and dikes that compose the crater of Muria. Most of the Muria volcanic materials are rarely in leucite, while some maars contain pumice-rich pyroclastic flows and basaltic lava. The results of the major elemental analysis of the Muria materials indicate that the rock tends to be of medium to high K affinity (~2% K2O). The Genuk and older Muria are consisting of leucite-rich tephrite-phonolite. It was two periods of magmatic series developed in the Muria-Peninsula that was resulting in the high-K to very high-K magmatism and the medium K Kalk-alkaline magmatism.
Volcanic Evolution of the Southern Mountain Neogene Magmatic Belt in Baturagung Range Central Java, Indonesia Mulyaningsih, Sri; Putong, Rahel; Prima, Anka; Hidayah, Radhtya Adzan; Kiswiranti, Desi
Journal of Geoscience, Engineering, Environment, and Technology Vol. 9 No. 04 (2024): JGEET Vol 09 No 04 : December (2024)
Publisher : UIR PRESS

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25299/jgeet.2024.9.04.18461

Abstract

Various Neogene volcanic rocks associated with calcareous sediments compose the Southern Mountain located from Imogiri at Yogyakarta to Wonogiri at Central Java, Indonesia. The volcanic rocks are concentrated along the north side of the Mountains which was recognized as the Neogene magmatic arc of Java; Baturagung is part of them. The discussion focuses on the relationship between the volcanic features and its basin evolution. The methods were geological fieldwork including measuring sections and collecting samples, thin sections, XRF, AAS, and micropaleontology. More than 13 circular hogbacks, circular valleys, and domes are observed based on the SRTM image. The petrology observed pyroxene-rich basaltic volcanic rocks, dacitic volcanic rocks, andesitic volcanic rocks, coral-rich volcanic breccia. From the bottom to the top, its stratigraphy of the Kebo-Butak Formation that notes basaltic volcanic rocks, pumice-rich lapillistone, and tuff of Early Neogene (before P4-N6) with muddy sandstone above the basalts of N 5-6 (Lower Miocene). The Semilir Formation consists of pumice-rich and dacitic tuff. Andesitic volcanic rocks of the Nglanggeran Formation with inlayer of marl of N 13-14. In the volcanic rocks trace elements show REE-rich (84-140 ppm), higher mobile elements of Sr (~480-602 ppm), medium Rb (22.2-23.7 ppm), and medium La (12-21 ppm), and wide range of immmobile trace elements of Nb ~2.7-7.9 ppm, Zr ~53-171 ppm, P ~840-1300 ppm, higher Ti (4400-4900 ppm), and higher Vanadium (V) of 92-302 ppm. Plot TiO2 vs. Al2O3 into the volcanic rocks indicates those were volcanism within plate boundaries. Plot Ta/Th vs Th/Hf shows continental extensional volcanism to continental arc margin. Plot Nb/Zr vs. Th/Zr explains the transitional zone to continental arc volcanism. The spider diagram shows Rb, Ce, P, Ti, Sr, Zr, and Y strongly metasomatized as a result of the upper continental arc. The chondrite normalized REE shows negative trends for Tb, Tm, Lu, Sm, and Eu and positive trends for Ce, Gd, Zr, and Y, which indicate superimposed volcanism under a submarine environment during the Neogene Period. Stratigraphic sections inform were periodically active volcanism. The Kebo-Butak Formation was formed by multiple volcanoes, some of which were active simultaneously while others were not, though both fall within the Early Neogene age range. Similarly, the Semilir and Nglanggeran Formations were also formed by volcanic activity from several volcanoes that were active at different times and overlapped with each other.
Co-Authors Abdul Faisal Baba Alansa, Frando Ryan Ari Kusnaedi Ari Kusnaedi Arie Kusniadi Ariel l Afrandi Tatawu Arif Wardana, Muhammad Arifin, Muhammad Nur Arisandy, Rydo Faisal Astuti, B. Astuti, B. B. Astuti Bronto, Sutikno Bronto, Sutikno Bronto, Sutikno Bronto, Sutikno Bronto, Sutikno Darwin Alijasa Siregar Deny Juanda Puradimaja Deny Juanda Puradimaja Desi Kiswiranti Dina Tania Dina Tania Dina Tania Dina Tania Dwi Indah Purnamawati, Dwi Indah Emilliana Natalia Trisakti Susanti, Maria Frando Ryan Alansa G. Hartono Godang Shaban Hartono, G. Hartono, G. Heriyadi, Nur Widi Astanto Agus Tri Hidayah, Radhitya Adzan Hidayah, Radhtya Adzan Hidayati, Fika Husadani, Y T I. Simon I. Simon I. W. Prasetyanto I. W. Prasetyanto Iva Mindayani Jayawarsa, A.A. Ketut Kusnaedi, Ari L. Budiyanto Lilis Apriyanti Marausna, Gaguk Mohamad Faizal Mohamad Faizal, Mohamad Muhammad Luqman Bukhori Muhammad Nur Arifin N.A.A.T Heriyadi Nur Rahmawati Prasetyanto, I. W. Prima, Anka Puradimaja, Deny Juanda Puradimaja, Deny Juanda Putong, Rahel Putra, Ikbal Rizki Rachmawati, Desiana Rydo Faisal Arisandy Sampurno Sampurno Sampurno Sampurno Sampurno, Sampurno Sampurno, Sampurno Sanjoto, Siwi Shaban, Godang Shandi Hargian Wijaksono Simon, I. Siregar, Darwin Alijasa Suhartono Suhartono - Suhartono Suhartono Suhartono Suhartono Suhartono Suhartono Suhartono Suparni Setyowati Rahayu Susastriawan, Anak Agung Putu Sutikno Bronto Sutikno Bronto Sutikno Bronto Sutikno Bronto Tatawu, Ariel l Afrandi Umboro, P A Vienastra, Septian Wijaksono, Shandi Hargian Wiloso, Danis Agoes Yahdi Zaim Yahdi Zaim Yoyok Ragowo Siswomijoyo Sukisman Zaim, Yahdi Zaim, Yahdi