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All Journal IJOG : Indonesian Journal on Geoscience Eksplorium : Buletin Pusat Pengembangan Bahan Galian Nuklir Jurnal Pengabdian Kepada Masyarakat (Indonesian Journal of Community Engagement) Journal of Geoscience, Engineering, Environment, and Technology Jurnal Pariwisata Dharma Bakti Jurnal Pariwisata Terapan JPPM (Jurnal Pengabdian dan Pemberdayaan Masyarakat) Jurnal Berdaya Mandiri Jurnal Rekayasa Industri (JRI) JURNAL TEKNOLOGI TECHNOSCIENTIA Indonesian Journal on Geoscience Indonesian Journal on Geoscience JURNAL ABDI MASYARAKAT INDONESIA (JAMIN) Jurnal Penelitian dan Pengabdian Masyarakat

Mulyaningsih, Sri

Departement Of Geology, Faculty Of Mineral Technology, Institut Sains & Teknologi AKPRIND, DIYogyakarta, Indonesia

Author-ID : 775910

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Perkembangan Geologi pada Kuarter Awal sampai Masa Sejarah di Dataran Yogyakarta Mulyaningsih, Sri; Sampurno, Sampurno; Zaim, Yahdi; Puradimaja, Deny Juanda; Bronto, Sutikno; Siregar, Darwin Alijasa
Indonesian Journal on Geoscience Vol 1, No 2 (2006)
Publisher : Geological Agency

http://dx.doi.org/10.17014/ijog.vol1no2.20065The uplift of Southern Mountains in Early Pleistocene has formed the Yogyakarta Basin. In this basin, the Merapi volcanic activity has been developing. Based on 14C dating in cinder deposits exposed at Cepogo, the volcanic activity took place since Â±42 ka. While on the basis of K/Ar dating in andesitic lava at Bibi Volcano, the activity took place since 0.67 ma. The high in the south and the appearance of Merapi volcanic dome in the north had caused a fl at valley. The southern part of the valley is bounded by the Southern Mountains and the western part is bounded by the West Progo Mountains. In the present time, the lithology of the areas which are interpreted as a palaeo-valley is composed of black clay deposits. This black clay is a contact between the basement rocks and Merapi volcanic deposits. The black clay deposits exposed in the Progo River (Kasihan) has been developed since Â±16.59 to 0.47 ka, while in the Opak River (Watuadeg) 6210 y BP. Younger black clay deposits intersecting with lahars are also exposed at the Winongo River and have an age of 310 y BP. The age data of volcanic stratigraphy shows that Merapi activities had taken place since Â±6210 up to Â±310 years ago. Â

Dinamika pengendapan lahar permukaan pada alur-alur lembah di bagian selatan Gunung Api Merapi, Yogyakarta Mulyaningsih, Sri; Sampurno, Sampurno; Zaim, Yahdi; Puradimaja, Deny Juanda; Bronto, Sutikno
Indonesian Journal on Geoscience Vol 1, No 3 (2006)
Publisher : Geological Agency

http://dx.doi.org/10.17014/ijog.vol1no3.20062Endapan aliran rombakan Gunung Api Merapi, yang lebih dikenal sebagai lahar, terbentuk dari hasil longsoran endapan awan panas yang dipicu oleh curah hujan yang sangat tinggi. Pada saat ini, endapan awan panas tersebut berasal dari guguran kubah lava. Material suspensi tersebut selanjutnya menuruni lereng dengan kecepatan yang tinggi, menghasilkan aliran turbulen. Aliran tersebut biasanya berkembang pada daerah dengan perbedaan morfologi berkemiringan lereng tinggi ke landai, atau yang sering dikenal sebagai daerah tekuk lereng. Studi ini didasarkan pada pengamatan dan pengukuran fragmen lahar yang berukuran besar di permukaan. Analisis meliputi arah penyirapan, bentuk, dan besar butir fragmen. Hasil penelitian mendapatkan model arah aliran fragmen besar lahar dari bagian atas aliran rombakan, yang membentuk âmodel punggung katakâ atau âmodel punggung gajahâ. Bagian depan katak atau gajah (kepala) yaitu arah aliran atau bagian depan aliran. Hasil penelitian juga menunjukkan bahwa model tersebut berlaku pada fragmen dengan diameter 90 cm atau lebih besar. Di daerah penelitian, fragmen dengan diameter 90 cm mencapai jarak hingga 22 km dari sumbernya. Hasil penelitian ini dapat digunakan sebagai model untuk menentukan arah aliran lahar (aliran rombakan) purba yang sumbernya belum diketahui. Â

Gunung api maar di Semenanjung Muria Bronto, Sutikno; Mulyaningsih, Sri
Indonesian Journal on Geoscience Vol 2, No 1 (2007)
Publisher : Geological Agency

http://dx.doi.org/10.17014/ijog.vol2no1.20074Three maars are well identifi ed in the Muria Peninsula, i.e. Bambang Maar, Gunungrowo Maar, and Gembong Maar. The maars were formed by monogenetic volcanic eruptions due to the interaction between heat source (magma), groundwater and calcareous basement rocks. This interaction is able to produce very high pressure of gas and steam causing phreatic explosions, followed by phreatomagmatic- or even magmatic explosions and ended by a lava extrusion. Satellite image analyses have recognized twelve circular features, comprising Bambang Maar, Gunungrowo Maar, and Gembaong Maar. Phisiographically, these maars are characterized by circular depressions which are surrounded by hills that are gently sloping down away from the crater or having a radier pattern morphology. Outcrops and drilling core in the circular areas that are considered as volcanic maars are lava fl ows, pyroclastic breccias, lapillistones, and tuffs, located far away from the eruption centres of Muria and Genuk Volcanoes. One of the circular features, i.e. Jepara Circular Feature, is also supported by negative anomaly (<30 mgal) showing a circular pattern. In the future, a maar volcano could possibly erupt depending on the tectonic reactivity in the region. Â

Waduk Parangjoho dan Songputri: Alternatif Sumber Erupsi Formasi Semilir di daerah Eromoko, Kabupaten Wonogiri, Jawa Tengah Bronto, Sutikno; Mulyaningsih, Sri; Hartono, G.; Astuti, B.
Indonesian Journal on Geoscience Vol 4, No 2 (2009)
Publisher : Geological Agency

http://dx.doi.org/10.17014/ijog.vol4no2.20091The Semilir Formation was typically originated from products of a very explosive volcanic activity, i.e. breccias, lapillistones, and tuffs containing abundant pumice. It has a light grey to white colour and high silica andesite to dacite in composition, mainly rich in volcanic glass and quartz. Sedimentary structures of these volcanic rocks are massive, grading, planar bedding, and cross-bedding to antidunes, with grain size varies from ash (â¤ 2 mm) to lapilli (2 â 64 mm) to bomb and block (> 64 mm). The formation is widely distributed from the west side (Pleret and Piyungan areas, Bantul Regency, Special Province of Yogyakarta) until Eromoko area in the east (Wonogiri Regency, Jawa Tengah Province). Stratigraphically, the Semilir Formation underlies the Nglanggeran Formation, and overlies the Mandalika Formation in the eastern part and Kebo-Butak Formation in the western part. Geomorphological- and lithological analyses of the Semilir Formation in areas of Parangjoho and Song- putri Dams, Eromoko Sub-regency, Wonogiri Regency indicate that the two depressions were alternatively volcanic sources of the Semilir Formation in the Eromoko area. This is proved by the presence of co-ignimbrite breccias(co-ignimbrite lag fall deposits), that descriptively they are polymict breccias. This rock is characterized by a mixing of pumice and various hard rock fragments that primarily are juvenile materials (volcanic blocks, bombs), accessory-, and accidental rock fragments set in pumice-rich volcanic ash and lapilli sizes. The accessory materials came from older volcanic rocks, whereas the accidental ones were originated from basement rocks. During a caldera forming event or a destruction period of an older composite volcanic cone(s), all older rocks resting above the magma chamber were ejected to the surface by a very high magmatic pressure. Since they were heavier than the juvenile material, most accessory and accidental rock fragments were left (lag fall) in caldera rim behind the ash and pumice flow. In the dam areas of Parangjoho and Songputri, the lag fall fragments consisting of andesite, pyroxene andesite, dacite, and pumice, being 10 â 150 cm in diameter are set in pumice-rich lapilli tuffs. Some of the rock fragments are volcanic blocks and bombs, while the older rocks are angular to very angular shape, having prismatic jointing or jigsaw-crack structures. The eruptions in the Parangjoho and Songputri craters were controlled by north-south trending fractures, and they resemble to the Katmaian caldera explosion type. Â

Vulkanisme kompleks Gunung Patiayam di Kecamatan Jekulo, Kabupaten Kudus, Provinsi Jawa Tengah Mulyaningsih, Sri; Bronto, Sutikno; Kusnaedi, Ari; Simon, I.; Prasetyanto, I. W.
Indonesian Journal on Geoscience Vol 3, No 2 (2008)
Publisher : Geological Agency

http://dx.doi.org/10.17014/ijog.vol3no2.20082The Mount Patiayam Complex was interpreted by previous researchers as âPatiayam Domeâ. That was reasoned by dips following its slope directions. Field data record that lithology of the complex of Mount Patiayam is dominated by volcanic rocks. The summit of the complex is composed of igneous rocks of pyroxene basalt rich in leucite minerals, associated with autoclastic breccia and beds of volcanic breccia rich in pyroxene basalt and pumice, pumiceous breccia, and tuff. Its flanks are composed of epiclastic rocks of lahar and fluvial deposits. Some river valleys, such as Pontang River, locally consist of pyroclastic breccia, autoclastic breccia and pumiceous breccia, that are overlain by marly limestone and black clay of swampy deposits. Based on the rock composition, the volcanism had more dominated geological processes compared with sedimentary. Mineral composition of volcanic deposits of the Mount Patiayam is closer to Mount Lasem volcanic rocks than Mount Muria, i.e. absarockites, shoshonites and trachyandesite. But, based on the long distance between Patiayam and Lasem, about 60 km, those volcanic rocks could not be produced by Mount Lasem. The Patiayam volcanic deposits were produced by its own volcanic activities. Therefore, the complex of Mount Patiayam is a paleo-volcano. The interpretation is also supported by the landsat imagery, showing depression-shapes in a caldera ring-like. There are four caldera features called as Rim 1,Rim 2,Rim 3, and Rim 4, which crosses each others. Â

Gunung Api purba Watuadeg: Sumber erupsi dan posisi stratigrafi Bronto, Sutikno; MulyaningSih, Sri; Hartono, G.; Astuti, B.
Indonesian Journal on Geoscience Vol 3, No 3 (2008)
Publisher : Geological Agency

http://dx.doi.org/10.17014/ijog.vol3no3.20081Pillow lava flows of pyroxene basalt containing 50 wt.% SiO are exposed at Opak River, west of Watuadeg Village, Sleman - Yogyakarta. The length of flow structures is between 2 â 10 m, with diameter of 0.5 â 1.0 m and it has a glassy skin at the surface body. Flow directions vary from N70E in the northern side, through N 120E in the middle to N 150E in the southern side. About 150 m away from the river to the west, there is a small hill about 15 m high, that has a similar composition with the pillow lavas. Both lava flows and the small hill are composed of pyroxene basalt, dark grey in color, hypocrystalline vitrophyre to porphyritic texture, with fine-grained phenocrysts of pyroxene (10 %) and plagioclase (25 %) set in glassy groundmass. These data indicate that the small hill was the eruption source of the basaltic pillow lavas. The lavas are overlain by pumice-rich volcaniclastic rocks, composed of tuff, lapillistones and pumice breccias, that are known as the Semilir Formation. Near the contact with lavas, the volcaniclastic rocks contain some fragments of pyroxene basalt, similar composition with the pillow lavas. This fact, together with analyses of petrology, volcanology, and radiometric dating show that the basaltic pillow lavas are unconformably overlain by the Semilir Formation. Â

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

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.

http://dx.doi.org/10.17014/ijog.vol3no3.20081Pillow lava flows of pyroxene basalt containing 50 wt.% SiO are exposed at Opak River, west of Watuadeg Village, Sleman - Yogyakarta. The length of flow structures is between 2 â€“ 10 m, with diameter of 0.5 â€“ 1.0 m and it has a glassy skin at the surface body. Flow directions vary from N70E in the northern side, through N 120E in the middle to N 150E in the southern side. About 150 m away from the river to the west, there is a small hill about 15 m high, that has a similar composition with the pillow lavas. Both lava flows and the small hill are composed of pyroxene basalt, dark grey in color, hypocrystalline vitrophyre to porphyritic texture, with fine-grained phenocrysts of pyroxene (10 %) and plagioclase (25 %) set in glassy groundmass. These data indicate that the small hill was the eruption source of the basaltic pillow lavas. The lavas are overlain by pumice-rich volcaniclastic rocks, composed of tuff, lapillistones and pumice breccias, that are known as the Semilir Formation. Near the contact with lavas, the volcaniclastic rocks contain some fragments of pyroxene basalt, similar composition with the pillow lavas. This fact, together with analyses of petrology, volcanology, and radiometric dating show that the basaltic pillow lavas are unconformably overlain by the Semilir Formation. Â

AKTIVITAS VULKANISME EKSPLOSIF PENGHASIL FORMASI SEMILIR BAGIAN BAWAH DI DAERAH JETIS IMOGIRI Mulyaningsih, Sri; Husadani, Y T; Umboro, P A; Sanjoto, Siwi; Purnamawati, Dwi Indah
JURNAL TEKNOLOGI TECHNOSCIENTIA Technoscientia Vol 4 No 1 Agustus 2011
Publisher : Lembaga Penelitian & Pengabdian Kepada Masyarakat (LPPM), IST AKPRIND Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.34151/technoscientia.v4i1.489

The widely exposed of volcanic rocks within western part of Central Java-DIY Southern Mountain areas, indicates that volcanic activities had influenced geology of this area. Volcanic-stratigraphic study finds pumiceus rocks, tuff and co-ignimbrite breccias that can be described as primery volcanic rocks at study areas. Those volcanic rocks were erupted explosively followed by collapsing strato cone and forming new caldera. The associate of volcanic rocks with co-ignimbrite breccias, indicates that the central eruption was not far from the outcropes. Shallow intrusive rocks of andecites bearing hornblendes that exposed at the highest cone shape geomorphology of Gunung Gede, south to southwest Sudimoro, might be as the central eruptions.

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

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