Identifikasi Jelajah Wisata Geologi Gunung Api Purba Gunung Ireng: Sisi Lain Gunung Api Purba Nglanggeran, Gunungkidul

Mulyaningsih, Sri

doi:10.22146/jpt.49649

Cited by 5 publications

(4 citation statements)

References 3 publications

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“…5). Such magmatic differentiation is accompanied by the decreasing amount of olivine and increasing amount of orthopyroxene and hydrous minerals (i.e., McBirney 2007;Jeffery et al 2013;van der Zwan et al 2013;Mulyaningsih et al 2016) (Fig. 6).…”

Section: Correlation Between Stratovolcano Types With Geological Datamentioning

confidence: 99%

Typology of Indonesian Stratovolcanoes: Insights from Geomorphological and Geological aspects

Suhendro,

Haryono

2023

IJG

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This study aims to provide the first general typology of Indonesian stratovolcano (number of analyses=154), including various types of rock compositions and diverse volcanic hazards. Several parameters were evaluated, including average radius (r), average slope (S), surface roughness (RMS), rock compositions, mineralogy, and deposit characteristics. Four types were identified as follows: (1) small-least dissected cones, (2) broad-dissected cones, (3) extremely broad-dissected cones with caldera, and (4) residual-highly dissected cones. Type I is typically small (r=2.1 km), steep (S=19.8ᵒ), rough (RMS=88.8), less evolved (predominantly basic to intermediate), having abundant mafic (olivine, clinopyroxene) and minor hydrous (amphibole, biotite) minerals, with rare pumice and lava domes (mostly scoria and lava flows). Type II has moderate values of r, s, and RMS (8.8 km, 15.2ᵒ, and 47.7, respectively) with predominantly intermediate rocks, minor olivine with abundant hydrous minerals, and abundant pumice and lava domes. Type III is typically large (r=18.1 km), gentle (S=9.2ᵒ), smooth (RMS=40.1), producing abundant felsic rocks and felsic minerals (quartz and sanidine), and characterized by the occurrence of thick ignimbrite deposits. Type IV has relatively similar size to type II (r=8.2 km), but the slope is gentler with coarser surface textures (S=10.7ᵒ and RMS=56.8), includes more portion of ultrabasic rocks and mafic minerals, and has no feature of lava domes with common exposure of intrusions (e.g., dyke). We suggest that the evolution from type I to type III corresponds to maturation stage, whereas the formation of type IV represents erosional stage.

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Section: Correlation Between Stratovolcano Types With Geological Datamentioning

confidence: 99%

Typology of Indonesian Stratovolcanoes: Insights from Geomorphological and Geological aspects

Suhendro,

Haryono

2023

IJG

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“…Formasi Nglanggeran ditindih secara tidak selaras oleh Formasi Oyo dan Formasi Wonosari. Formasi Wonosari merupakan formasi batuan dengan litologi penyusun batugamping yang cukup luas dan memiliki umur Miosen (Mulyaningsih, 2019) Berikutnya terdapat Formasi Kepek yang terbentuk selaras menjemari dengan Formasi Wonosari dan Endapan permukaan yang menutupi di atasnya (Arif, Heriyad, Patra, & Budrianto, 2021). Sehingga penyelidikan potensi keberadaan dan kedalaman air tanah di Nglanggeran Kulon perlu dikaji karena wilayah ini membutuhkan sumber air baru untuk memenuhi kebutuhan air warga dan juga kebutuhan air wisatawan.…”

Section: Pendahuluanunclassified

Pendugaan Potensi Air Tanah Beserta Kedalamamnya Dengan Metode Resistivitas Konfigurasi Shlumberger Di Nglanggeran Kulon Kabupaten Gunung Kidul

Nurul

Arif²,

Hidayah³

et al. 2022

Jambura Physics J.

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“…The previous study recorded three types of rock associations in it including the high silicaoversaturated or saturated potassic series, the weakly silica-saturated alkaline-potassic series, and the strongly silica-oversaturated ultrapotassic series (Leterrier et al, 1990). Those imply the mineral association that some of them have foid minerals and some others rare in foid minerals (Wibowo et al, 2022, Marin et al, 2019, Nicholls and Whitford, 1983, Mulyaningsih et al, 2008, and Mulyaningsih and Sanyoto, 2012. As a long-dormant volcano, Muria still has a probability of future eruptions for the next 100 years, although the probability value is very low 5x10 -4 -4x10 -4 (McBirney et al, 2003).…”

Section: Introductionmentioning

confidence: 96%

The Petrology and Volcano-Stratigraphy of The Muria-Peninsula High-K Volcanic Rocks, Central Java, Indonesia

Mulyaningsih

Bronto²,

Kusniadi³

et al. 2022

J. Geoscience Eng. Environ. Technol.

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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.

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Identifikasi Jelajah Wisata Geologi Gunung Api Purba Gunung Ireng: Sisi Lain Gunung Api Purba Nglanggeran, Gunungkidul

Cited by 5 publications

References 3 publications

Typology of Indonesian Stratovolcanoes: Insights from Geomorphological and Geological aspects

Typology of Indonesian Stratovolcanoes: Insights from Geomorphological and Geological aspects

Pendugaan Potensi Air Tanah Beserta Kedalamamnya Dengan Metode Resistivitas Konfigurasi Shlumberger Di Nglanggeran Kulon Kabupaten Gunung Kidul

The Petrology and Volcano-Stratigraphy of The Muria-Peninsula High-K Volcanic Rocks, Central Java, Indonesia

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