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All Journal IJOG : Indonesian Journal on Geoscience Jurnal Geologi dan Sumberdaya Mineral (Journal of Geology and Mineral Resources) JLBG (Jurnal Lingkungan dan Bencana Geologi) (Journal of Environment and Geological Hazards) Buletin Sumber Daya Geologi Majalah Ilmiah Pengkajian Industri Indonesian Journal on Geoscience Indonesian Journal on Geoscience Jurnal Geologi dan Sumberdaya Mineral (Journal of Geology and Mineral Resources) Eksplorium : Buletin Pusat Pengembangan Bahan Galian Nuklir
Ronaldo Irzon
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Aerospace Engineering Chemical Engineering, Chemistry & Bioengineering Chemistry Earth & Planetary Sciences Education Energy Engineering Environmental Science Industrial & Manufacturing Engineering Materials Science & Nanotechnology Transportation

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Nickel and Chrome Pollutions Identification in the Coastal Area of Kulon Progo, Yogyakarta Ronaldo Irzon
Jurnal Lingkungan dan Bencana Geologi Vol 8, No 2 (2017)
Publisher : Badan Geologi

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (1909.76 KB) | DOI: 10.34126/jlbg.v8i2.143

Abstract

Abstract Kulon Progo is located in the southern part of Yogyakarta Special Province, Indonesia. The regency is famous of some tourist beach points. This study discusses the compositiom of beach sand samples in three coastal areas in Kulon Progo: Karangwuni, Glagah, and Congot in relation to environmental issues. Seven samples of four locations were megascopically descripted and analyzed using XRF and ICP-MS for geochemistry contents. Four of samples are beach sands from the surface whilst the others were collected from about 50 cm below surface. Box plots show maximum Cr outlier and minimum most of REE outliers in the group of beach sand samples. Nickel and chrome tenor anomalies were detected in samples from coastline of Karangwuni and Glagah. On the other hand, no Ni and Cr anamalies were indentified in the two samples 200 m from the seashore of Karangwuni nor the two samples near Congot seashore. In the polluted location, the two heavy metals are relatively concentrated in the surface. Two volcanic rock samples from the Andesite domain are selected to trace the origin of the heavy metals. The wastes of basic metal mining in northern Kulon Progo together with urban activities and several industries in Wates were then transported through the Serang River to Indian Ocean. Tidal currents helps the heavy metals to be deposited in the coastal areas near the mouth of Serang River. This study also concluded that folk gold mining activity in Sangon is not the source of Ni and Cr pollution to the coast of Kulon Progo.Keyword: geochemistry, beach sand, Kulon Progo, heavy metals pollution. Sari Kulon Progo berlokasi di bagian selatan Provinsi Daerah Istimewa Jakarta, Indonesia. Kabupaten ini terkenal dengan beberapa lokasi wisata pantai. Studi ini membahas mengenai komposisi pasir pantai pada tiga lokasi pantai di Kulon Progo: Karangwuni, Glagah, dan Congot terkait dengan masalah lingkungan. Tujuh contoh dari empat lokasi penelitian telah dideskripsikan secara megaskopis dan dianalisis kandungan geokimianya menggunakan XRF dan ICP-MS. Empat contoh merupakan pasir pantai yang berasal dari permukaan sedangkan contoh lain berasal dari 50 cm di bawah permukaan. Box plot dengan jelas menunjukkan keberadaan maximum outlier pada Cr dan minimum ourlier pada banyak elemen dari REE pada kelompok contoh pasir pantai. Anomali tinggi nikel dan krom terdeteksi pada seluruh contoh yang berada dekat tepi pantai di Karangwuni dan Glagah. Namun demikian, tidak terdapat anomali Ni dan Cr pada dua contoh yang berasal dari 200 m sebelum tepi pantai Karangwuni maupun dua contoh dari Pantai Congot. Pada titik yang tercemar polusi, dua logam berat ini lebih terkonsentrasi pada bagian permukaan. Dua batuan vulkanik dari wilayah Andesit dipilih dalam menelusuri asal muasal logam berat tersebut. Sampah sisa penambangan logam dasar bersama dengan aktifitas perkotaan dan industri di Kulon Progo telah terbawa oleh aliran Sungai Serang menuju Samudera Hindia. Arus bolak-balik air laut membantu logam berat tersebut terdepositkan di wilayah pantai dekat dengan mulut Sungai Serang. Studi ini turut menyimpulkan bahwa penambangan emas rakyat di Sangon bukan sebagai sumber pencemaran Ni dan Cr di tepi pantai Kulon ProgoKata kunci: geokimia, pasir pantai, Kulon Progo, polusi logam berat
Contrasting Two Facies of Muncung Granite in Lingga Regency Using Major, Trace, and Rare Earth Element Geochemistry Ronaldo Irzon
Indonesian Journal on Geoscience Vol 2, No 1 (2015)
Publisher : Geological Agency

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (804.046 KB) | DOI: 10.17014/ijog.2.1.23-33

Abstract

DOI:10.17014/ijog.2.1.23-33Lingga Regency is located in the main range of the famous Southeast Asia granitic belt related to tin resources. There are two granitic units in this region: the S-type Muncung Granite and I-type Tanjungbuku Granite. XRF and ICP-MS were used to measure the major, trace, and rare earth elements of nine Muncung Granite samples. Two different patterns were identified from major data plotting on Harker variation diagram. Granitic rocks from Lingga and Selayar Islands are classified as A facies while others from Singkep Island is B facies. This paper used graphs and variation diagrams to reveal the differences of those two facies. Thus, REE correlation to SiO2, trace element spider diagram, and REE spider diagram show more contrasts correlation. However, both facies are syn-collisional and High-K calc-alkaline granites. Some identical characters with other granitic units in Peninsular Malaysia were also detected in this work.
Trace and Rare Earth Elements Compositional Change on Andesite Alteration in Kaligesing, Purworejo Joko Subandrio; Ronaldo Irzon
Jurnal Geologi dan Sumberdaya Mineral Vol. 21 No. 1 (2020): Jurnal Geologi dan Sumberdaya Mineral
Publisher : Pusat Survei Geologi

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33332/jgsm.geologi.v21i1.452

Abstract

The change of chemical composition because of hydrothermal alteration process is related to the modification on mineralogy and elements mobility. Different alteration conditions could lead to dissimilar geochemical character. This study aims to discuss the alteration effect on trace and rare earth elements composition of an andesite outcrop with hydrothermal alteration in Kaligesing, Purworejo, Central Java Province. Microscopic analysis at Central for Geological Survey was applied to determine the modal mineral composition of the selected samples whilst trace and rare earth elements abundances was measured using Inductively Coupled Plasma – Mass Spectrometry. Plagioclase is the major phenocryst embedded in the fine-grained feldspar and glass groundmass of relatively fresh andesite. On the other hand, sericite, chlorite, epidote, and iron oxide are detected in the altered rock. The more Sr and Rb compositions on unaltered sample exhibit their common existence in plagioclase. The bigger Rb/Sr and the lower Ba/Sr ratios inward to the center of alteration might indicate the more degree of K-bearing mineral formation than Ca-rich mineral alteration. The Ba/Zr escalation and Zr/Y reduction from relatively fresh rock through to the vein of the studied samples are parallel to the previous investigation about andesite alteration. Chondrite-normalized rare-earth elements (REE) pattern of unaltered, altered, and vein samples depicts similar patterns: strong enrichment of Low REE, positive Eu anomaly, and relatively flat high REE. The decrease of Eu anomaly may reflect the reduction of plagioclase modal composition because of alteration and might indicate a reductive alteration state.Keywords: Alteration, andesite, geochemistry, trace and rare earth elements.
Plagioclase Fractionation On The Holocene Volcanic Rocks Evolution In West Halmahera Regency Ipranta Ipranta; Ronaldo Irzon
Jurnal Geologi dan Sumberdaya Mineral Vol. 20 No. 3 (2019): Jurnal Geologi dan Sumberdaya Mineral
Publisher : Pusat Survei Geologi

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33332/jgsm.geologi.v20i3.468

Abstract

The tectonic complexity in the Maluku region is caused by the interaction of the three main platesin this area, namely: the Philippine Plate, the Australian Plate, and the Eurasian Plate. The origin of volcanic rock-forming material from Jailolo Mount., Sahu Mount., Gamkonora Mount., and Ibu Mount. in West Halmahera Regency is the aim of this study. Petrographic, trace elements, rare earth elements analysis are also used to study rock formation processes and correlations between sample groups. Bipolar microscope and Inductively Coupled Plasma - Mass Spectrometry of the Center for Geological Survey Laboratory are the analytical devices used in this study. Almost all samples are classified as andesite based on the comparison of the quartz, K-feldspar, and plagioclase compositions. There is a possibility of mixing between oceanic crust and continental crust of the studied Holocene volcanic which is indicated by La/Yb versus Nb/La diagrams. Fractional crystallization is considered more influential in rock formation compared to partial melting. The effect of plagioclase fractionation on the four volcanic rock groups is shown by the Y versus Sr/Y diagram and rare earth spider diagram patterns. Increased levels of rare earths in samples from G. Gamkonora and G. Sahu are strongly influenced by crystallization of plagioclase during rock formation.Key words: volcanic rocks, petrography, geochemistry, West Halmahera
Petrology and Geochemistry of The Volcanic Arc Tarusan Pluton in Comparison to Lolo Pluton, West Sumatra Ronaldo Irzon; Ildrem Syafri; Irfani Agustiany; Arief Prabowo; Purnama Sendjaja
Jurnal Geologi dan Sumberdaya Mineral Vol. 20 No. 4 (2019): Jurnal Geologi dan Sumberdaya Mineral
Publisher : Pusat Survei Geologi

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33332/jgsm.geologi.v20i4.471

Abstract

The Volcanic Arc Suite is the group of batholiths in the range of the Barisan Mountains and mostly denotes I-type affinity. Previous investigations of the intrusions in West Sumatra emphasized the crystallization age without completing geochemistry characteristics. No former study discussed a pluton which mapped in the Kota XI Tarusan District. This study explains the geochemistry and petrology of the Tarusan Pluton using polarized microscope, XRF, and ICP-MS at the Center for Geology Survey of Indonesia. The microscopic analysis confirms the granite character of the samples. Although both plutons are identified as I-type calc-alkaline series, the Tarusan Pluton is peraluminous granite whilst the Lolo Pluton denotes wider range from metaluminous to peraluminous of granodiorite to granite. Both the plutons are clearly classified as volcanic arc granitoid in the correlation to Volcanic Arc Suite of Sumatra. Negative Ba, Nb, and P anomalies together with positive K, Nd, and Y anomalies are pronounced on the two felsic intrusions. Negative Eu anomaly on the Tarusan Pluton but the positive one at the Lolo Pluton might explain different magma evolution process.Keywords: volcanic arc granite, geochemistry, Tarusan Pluton, Lolo Pluton.
Dosis Radiasi Gamma Beragam Jenis Batuan di Wilayah Utara Pulau Bangka Irzon, Ronaldo; Kurnia, Kurnia; Rohiman, Asep; Yurnaldi, Dida; Kusworo, Aries
Jurnal Lingkungan dan Bencana Geologi Vol 13, No 3 (2022)
Publisher : Badan Geologi

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.34126/jlbg.v13i3.444

Abstract

Radioaktivitas dapat terjadi secara alami maupun disebabkan oleh aktifitas manusia. Salah satu radioaktivitas alami terdapat pada batuan yang bergantung kepada jenis dan komposisinya. Studi ini bermaksud untuk menjelaskan dosis radiasi beberapa jenis batuan yang teradapat di wilayah Pulau Bangka bagian utara. Perangkat Geiger–Müller counter tipe FH 40 G Multi-Purpose Digital Survey Meter dari Thermo dipergunakan untuk mengukur dosis radiasi batuan pada penelitian ini. Pengukuran pada setiap sampel dilakukan setidaknya tiga kali dan nilainya telah diolah secara statistik untuk menapatkan hasil yang valid. Jenis batuan dengan tingkat dosis radiasi tertinggi hingga terendah adalah granit, sedimen tersilisifikasi, sedimen, dan diabas dengan rerata 466 nSv/h, 116 nSv/h, 90 nSv/h, dan 74 nSv/h secara berurutan. Penelitian ini membuktikan bahwa granit adalah bahan bangunan utama yang digunakan oleh masyarakat Pulau Bangka meskipun batuan tersebut memiliki resiko radioaktif terbesar relatif terhadap jenis batuan lain.
Inventarisasi dan Penilaian Geowisata Kuantitatif Calon Geosite di Geopark Silokek, Kabupaten Sijunjung, Provinsi Sumatra Barat Irzon, Ronaldo; E.Setiawan, Verry; Yurnaldi, Dida; Afdal Yulius; Riecca Oktavitania; Deswira Harneti
Jurnal Geologi dan Sumberdaya Mineral Vol. 25 No. 4 (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.v25i4.817

Abstract

Abstrak- Sebuah geopark harus memiliki warisan geologi di kawasannya, di mana warisan geologi itu boleh jadi memiliki potensi wisata yang perlu disinergikan dengan elemen lain penggerak ekonomi masyarakat. Geopark Silokek adalah salah satu kawasan pembangunan berkelanjutan di wilayah Provinsi Sumatra Barat. Tulisan ini bertujuan untuk menginventarisasi calon situs warisan geologi di dalam kawasan Geopark Silokek dan melakukan penilaian secara kuantitatif terhadap potensi geowisata situs tersebut. Studi ini menerapkan metode penilaian kuantitatif yang telah dipergunakan secara internasional. Nilai total potensi geowisata delapan calon geosite di Geopark Silokek berkisar 255-340 dari nilai maksimal 400. Lower Ombilin Sungai Rambutan disimpulkan sebagai calon geosite yang nilai potensi wisatanya paling rendah terutama karena aksesibilitasnya yang sulit, fasilitas keamanan yang kurang memadai, dan jaraknya yang jauh dari lokasi rekreasi lainnya. Komplek Karst Silokek dan Kompleks Intrusi Mambui adalah dua calon geosite dengan nilai potensi geowisata tertinggi karena didukung oleh fasilitas keselamatan, ketersediaan logistik, berpemandangan indah, kondisi pengamatan yang baik dan berada di dekat lokasi rekreasi lainnya. Potensi geowisata calon geosite di dalam Geopark Silokek perlu dikembangkan, sehingga keadaan sosial-ekonomi masyarakat setempat dapat meningkat. Kata Kunci: geosite, geowisata, geopark, Komplek Karst Silokek
PENGAYAAN LOGAM BERAT Mn, Co, DAN Cr PADA LATERIT NIKEL DI KABUPATEN KONAWE UTARA, PROVINSI SULAWESI TENGGARA Irzon, Ronaldo
Buletin Sumber Daya Geologi Vol 12 No 2 (2017): Buletin Sumber Daya Geologi
Publisher : Pusat Sumber Daya Mineral Batubara dan Panas Bumi

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.47599/bsdg.v12i2.37

Abstract

Proses pelapukan lebih mudah terjadi pada wilayah beriklim tropis seperti di Indonesia dan meredistribusi kandungan kimia batuan induk. Hasil proses pelapukan batuan ultramafik banyak teridentifikasi di Kabupaten Konawe Utara, Provinsi Sulawesi Tenggara. Proses pengayaan logam-logam berat pada horizon pelapukan di wilayah Konawe Utara merupakan tujuan penelitian ini. Perangkat XRF dan ICP-MS milik Laboratorium Geologi – Pusat Survei Geologi dimanfaatkan dalam pengukuran kadar oksida utama, unsur jarang, dan unsur tanah jarang pada setiap horizon pelapukan dari tiga profil: Andowia, Wawolimbue, dan Marombo. Horizon saprolit di Marombo dianggap layak untuk dijadikan pengganti horizon saprolit di Wawolimbue, karena berasal dari lokasi yang tidak jauh dan sebagai hasil dari pelapukan batuan ultramafik. Dapat disimpulkan bahwa logam berat: Mn, Co dan Cr terkayakan pada horizon laterit relatif terhadap dua horizon pelapukan lainnya, sedangkan Ni tertahan pada transitional bedrock. Pada sisi lain, Mg, Si, dan Ca cenderung mengalami pengurangan bertahap berbanding lurus dengan proses pelapukan. Profil Wawolimbue dan Marombo sangat mungkin berasal dari batuan induk yang sama dan dipertegas oleh diagram laba-laba unsur tanah jarang. Perbedaan pola diagram unsur tanah jarang berikut derajat anomali Eu menegaskan kesimpulan bahwa profil Andowia berasal dari batuan induk berbeda terhadap profil Wawolimbue-Marombo. Unsur tanah jarang paling terkayakan pada horizon laterit dengan anomali Ce negatif terkait terbentuknya fraksi lempungan dan oksidasi spontan Ce3+ menjadi Ce4+ saat pelapukan.
LIMBAH PENCUCIAN BAUKSIT SEBAGAI SUMBER UNSUR TANAH JARANG POTENSIAL; STUDI KASUS PULAU SELAYAR, PROVINSI KEPULAUAN RIAU Irzon, Ronaldo
Buletin Sumber Daya Geologi Vol 13 No 1 (2018): Buletin Sumber Daya Geologi
Publisher : Pusat Sumber Daya Mineral Batubara dan Panas Bumi

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.47599/bsdg.v13i1.63

Abstract

Bauksit dihasilkan dari proses pelapukan batuan kaya mineral alkali, telah mulai dieksploitasi di Pulau Selayar, wilayah Kabupaten Lingga, Provinsi Kepulauan Riau yang menjadi lokasi penelitian ini. Sumber daya aluminium di daerah ini tergolong ke dalam kelompok laterit-bauksit, karena terbentuk akibat proses pelapukan dan belum pernah ditemukan keterdapatan karst. Penelitian ini bertujuan untuk mengetahui perbandingan kadar dan karakter unsur tanah jarang pada beberapa jenis conto dari lokasi tambang bauksit di Sembuang, Pulau Selayar. Selain itu, juga bertujuan untuk mengetahui jenis mineral dan jenis bijih bauksit. Perangkat analisis pada studi ini adalah ICP-MS, XRF, dan XRD dari Laoratorium Geologi – Pusat Survei Geologi yang secara berturut-turut dimanfaatkan untuk mengetahui kelimpahan unsur tanah jarang, kadar oksida utama, dan jenis mineral lempung pada contoh. Gibsit terdeteksi sebagai mineral alumina utama dan menjadi petunjuk bahwa proses bauksitisasi berlangsung pada kondisi tropis. Walaupun batuan yang berada di stockpile dapat dikategorikan sebagai bauksit, namun belum memiliki kadar alumina ekonomis. Meski terindikasi lebih tinggi dari pada lima conto lainnya, kadar UTJ pada bauksit hasil pencucian berada dalam tingkat menengah. Namun, karakteristik konsentrasi Cerium (Ce) yang tinggi, sebagai bahan buangan di atas permukaan, dengan tekstur yang lunak, dan luas bidang permukaan yang besar dapat dijadikan pijakan bahwa sisa pencucian layak diproses dalam pemurnian unsur Cerium menjadi material ekonomis. Berdasarkan data anomali positif unsur Ce, hampir seluruh conto telah mengalami proses oksidasi. Komposisi plagioklas terhadap mineral lain pada conto bauksit di stockpile, sangat mungkin telah menurun kibat proses pencucian dan penyaringan berdasarkan pada anomali negatif unsur Europium (Eu), sedangkan conto lain justru menunjukkan anomali positif.
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 Afdal Yulius Agustiany, Irfani Arief Prabowo Aries Kusworo Asep Rohiman, Asep Baharuddin Baharuddin Abdullah, Baharuddin Baharuddin Baharuddin Deswira Harneti E. Setiawan, Verry E.Setiawan, Verry Hamdan Z. Abidin, Hamdan Hanang Samodra Heri Hermiyanto Heri Syaeful Ildrem Syafri Ildrem Syafri Imtihanah Imtihanah, Imtihanah Ipranta Ipranta Ipranta Ipranta, Ipranta Irfani Agustiany Joko Soebandrio, Joko Joko Subandrio Joko Wahyudiono Kurnia KURNIA KURNIA, KURNIA Moh. Heri Hermiyanto Zajuli Ngadenin Prabowo, Arief Purnama Sendjadja, Purnama Purnama Sendjaja Riecca Oktavitania Rizkika, Ollybinar Sam Permanadewi Sendjaja, Purnama Sigit Maryanto Suyono Suyono Tardeli, Alles Sandra W, Hermawan Wafid A.N., Muhammad Yurnaldi, Dida