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All Journal Jurnal Geologi dan Sumberdaya Mineral (Journal of Geology and Mineral Resources)
Hanang Samodra
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Chemistry Earth & Planetary Sciences Energy

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HUBUNGAN LEMBAH SADENG, CEKUNGAN BATURETNO DAN TERAS BENGAWAN SOLO,JAWA BAGIAN TENGAH Surono Martosuwito; Hanang Samodra; Sidarto Sidarto
Jurnal Geologi dan Sumberdaya Mineral Vol. 23 No. 3 (2013): Jurnal Sumber Daya Geologi
Publisher : Pusat Survei Geologi

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33332/jgsm.geologi.v23i3.88

Abstract

Sadeng valley or ancient river of Sadeng had head water at surrounding Giriwoyo, Wonogiri. Baturetno basin spread outs widely at the south of Wonogiri. When the Old Lawu Mountain erupted, the volcanic products flowed and blocked the Solo River caused big flooding that covered the Baturetno basin. At any time the river might cut the volcanic block, big flooding happed in the valley of the Solo River. As the result, floras and faunas which lived in the valley were got dead. In the next flooding their skeleton were transported and deposited at the Solo terrace. Such things were happened many times. Animal fossils and homonids could possibly much more abundance in the older terraces rather than in the younger one.Key words: Sadeng Valley, Beturetno Basin, Bengawan Solo Terraces, relationship
Analisis Petrografi dan Geokimia Batuan Diorit-Granodiorit-Granit di Daerah Gorontalo, Sulawesi Sam Permanadewi; Hanang Samodra
Jurnal Geologi dan Sumberdaya Mineral Vol. 23 No. 4 (2022): Jurnal Geologi dan Sumberdaya Mineral
Publisher : Pusat Survei Geologi

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33332/jgsm.geologi.v23i4.718

Abstract

Petrografi dan geokimia batuan granitoid didekati dari aspek petrografi dan whole-rock X-ray fluorescence (XRF) serta pemodelan data geokimia unsur utama menggunakan perangkat lunak GCDkit berbasis bahasa pemrograman R. Kelompok batuan Gorontalo diorit-granodiorit-granit (DGG) merupakan kelompok batuan beku plutonik bersifat menengah-asam yang dapat dibedakan jenisnya berdasarkan persentase kehadiran mineral kuarsa, alkali feldspar dan plagioklas serta komposisi geokimia. Secara fisik, batuan tersebut menunjukkan struktur masif, tekstur holokristalin dengan bentuk kristal umumnya euhedral-subhedral dengan ukuran kristal fanerik sedang hingga sangat kasar. Analisis pada batuan Gorontalo DGG menunjukkan kecenderungan sifat magnesian dengan indeks saturasi aluminium seluruhnya adalah metalominous dan memilik seri magma dengan tipe kalk-alkalin yang berasosiasi dengan lingkungan subduksi dengan perkiraan kedalaman peleburan sebagian magma terjadi pada kedalaman antara 114 hingga 160 km. Material batuan yang mengalami peleburan berasal dari dua jenis yang berbeda, yaitu low dan high-K mafic rocks. Selanjutnya, proses diferensiasi magma Gorontalo DGG setidaknya mengalami proses magma mixing, gravitational settling mineral, dan fraksionasi.Katakunci: DGG, geokimia, Gorontalo, petrografi.
Prospecting CCS Project in Indonesia: A Case Study in Meratus Mountains, South Borneo Irzon, Ronaldo; Hanang Samodra; Sam Permanadewi
Jurnal Geologi dan Sumberdaya Mineral Vol. 25 No. 1 (2024): JURNAL GEOLOGI DAN SUMBERDAYA MINERAL
Publisher : Pusat Survei Geologi

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33332/jgsm.geologi.v25i1.784

Abstract

Long-term extensive carbon dioxide exposure inflicts diseases for humans and endangers the ecosystem. Carbon Capture and Storage (CCS) is a breakthrough to reduce CO2 in the atmosphere. The purpose of this study is to describe the CCS principles and suitability of this work in Indonesia, especially in the Meratus Mountains. The studied region is the major area of the Meratus Geopark. Selected ultramafic rocks from the Meratus Geopark were analyzed using X-Ray Fluorescence in the University of Tasmania. CCS project should consider the minimum implication for conservation strategy of geopark. Geologically, CCS is adapted through direct sequestration and carbon mineralization. Mafic-ultramafic lithologies are the best option for mineral carbonation. Most of the basaltic rocks in Indonesia are situated near active volcanoes that are heavily risky for CCS works. Ultramafic in the range of Meratus Geopark is clearly suitable for CCS because of its large expanse, far away from active volcanoes, without significant nickel mining activity. The project would promote geohazards and climate change issues of Meratus Geopark. In-situ CSS mineral carbonation should be located avoiding the Sultan Adam Mandiangin Serpentinite Geosite to nourish the geoconservation of Meratus Geopark. A successful CCS adaptation would be good evidence for the Indonesian government implementing the Paris Agreement. Keywords: Carbon Capture and Storage, In-situ mineral carbonation, ultramafic, Meratus Geopark.
Co-Authors Ronaldo Irzon Sam Permanadewi Sam Permanadewi Sidarto Sidarto Surono Martosuwito