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All Journal Komunikasi Fisika Indonesia TAMBANG Jurnal Ilmiah MTG Jurnal IPTEK Jurnal Geomine PROMINE Jurnal Mineral, Energi dan Lingkungan Jurnal Mineral, Energi dan Lingkungan Website Jurnal Ilmiah Geologi pangea

Idarwati Idarwati

Program Studi Teknik Geologi, Universitas Sriwijaya

Author-ID : 3974311

Civil Engineering, Building, Construction & Architecture Computer Science & IT Earth & Planetary Sciences Electrical & Electronics Engineering Energy Engineering Environmental Science Industrial & Manufacturing Engineering Materials Science & Nanotechnology Mechanical Engineering Physics

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MINERALISASI DAN POLA ALTERASI DAERAH LAKEA, KECAMATAN LAKEA KABUPATEN BUOL, PROVINSI SULAWESI TENGAH ., Idarwati, S.T., M.T.
PROMINE Vol 1, No 1 (2013): PROMINE
Publisher : Jurusan Teknik Pertambangan FT UBB

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (5.687 KB)

The research area is located in the village of Lakea, Lakea subdistrict, Buol district, Central Sulawesi Province. Constituent Lithology within research area consists of three units, these are litodem lava basalt that mainly be composed by lava andesite and lava basalt which partly fractured, volcanic breccia, and tuff; Sandstone Unit mainly composed by sandstone, mudstone, muddy sandstone, and conglomerate; and the last unit is limestone as Coral Limestone Unit. Alteration assemblage is divided into four zones, namely argillic alteration zone (silicon oxide (kuarsa), magnesium aluminum iron silicate hydroxide, potassium aluminum silicate hydroxide dan sodium calcium aluminum silicate (albit), phyllic alteration zone (serisit/muskovit-kuarsa-klorit-feldspar), propylitic alteration zone (Chlorite-serpentine, Illite, Albite, calcian, ordered, Quartz, Muscovite ), and silicified alteration zone (quartz/silica + adularia + calcitÂ± illite). The mineralization is controlled by open space filling with disseminated distribution. Gold mineralization usually associated with pyrite, chalcopyrite, and galena. Mineralization is found fill the major structural pattern with southeast-northwest direction. The fluid inclusion measurement results obtained that microthermometry Th (homogenization temperature when the fluid trapped in the crystals) ranged from 172 ~ 332 Â°C with a measurement range from 180.9 to 211.0 Â°C, and the melting temperature (first ice melting Temperatures / Tm) average ranges -1, 2 to 0.8 oC. By calculations, the depth of the formation rate is 79.4 ~ 1712 m, and under pressure about 8.2 ~ 130.3 bar.Keyword : Lakea, Buol, Alteration

Identifikasi Endapan Batuan Volkanik Berdasarkan Data Sistem Informasi Geografi (SIG) Daerah Danau Ranau, Propinsi Sumatera Selatan ., Idarwati
PROMINE Vol 3, No 1 (2015): PROMINE
Publisher : Jurusan Teknik Pertambangan FT UBB

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (5.687 KB)

Ranau Lake as the second biggest lake in Sumatra Island. On Plio-Pleistocene Ranau Volcano (Volcano-tectonic) eruption resulted the formation of Ranau Lake. After the great eruption of Ranau Volcano, grow up another volcanoes like Seminung Volcano, and become a Ranau Volcanic Complex. At the foot of Seminung Volcano often showed sulfur gas burst activity which are indicated by the death of organism in Ranau Lake. The increasing of burst gas and locally earthquacke to be the principle one to predict the possibility of volcano eruption for anticipation and decrease the impact of volcano eruption. The research objective was to determain the characteristics of rocks formation surrounding Ranau Lake using Landsat Imagery. Â Â Â Â Â Keywords: Ranau Lake, Volcano, Landsat Imagery.

POTENSI SUMBERDAYA BATUBARA DAERAH NYUATAN KABUPATEN KUTAI BARAT PROVINSI KALIMANTAN TIMUR Idarwati Idarwati
Jurnal Ilmiah MTG Vol 4, No 1 (2011)
Publisher : Jurusan Teknik Geologi Fakultas Teknologi Mineral UPN "Veteran" Yogyakarta

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Dewasa ini pemerintah tengah meningkatkan pemanfaatan batubara sebagai energi alternatif baik untuk keperluan domestik seperti pada sektor industri dan pembangkit tenaga listrik, maupun untuk keperluan ekspor. Sejalan dengan itu pemerintah telah melibatkan pihak swasta dalam pengusahaan pengembangan batubara.Secara administratif lokasi daerah penelitian terletak pada daerah Nyuatan dan sekitarnya, Kabupaten Kutai Barat, Provinsi Kalimantan Timur dengan geografis lokasi terletak pada koordinat 00.29’.14” – 00.32’.00” Lintang Utara dan 1150.14’.35” – 1150.18’.13” Bujur Timur. Formasi daerah penelitian ditempati oleh Formasi Warukin pada bagian utara yang berumur Miosen Tengah – Miosen Akhir dan pada bagian Selatan ditempati Formasi Pamaluan yang berumur Oligosen Akhir – Miosen Awal, yang membentang dari Baratdaya – Timurlaut dan merupakan Formasi pembawa batubara.

FASIES KUARTER VULKANIK DAERAH PAGAR JATI DAN SEKITARNYA, KAB.BENGKULU TENGAH, BENGKULU Aditya N.P.H; Oke Aflatun; Idarwati Idarwati
Komunikasi Fisika Indonesia Vol 15, No 2 (2018)
Publisher : Universitas Riau

The Jati Fence Area, Bengkulu is the fore arc basin area whose deposition is influenced by the volcanic event. The deposition event took place on a quaternary volcano that has been active in having sedimentation activities that continue. This study aims to carry out mineralogical analysis in the proximal facies deposit area with petrographic data at observation locations (LP) 14, 59, 81,108, and (ST) 14,70 which are sourced from the results of local geological mapping. In LP 81 and 14 with proximal facies have volcanic breccia lithology with compilation components which are dominated by andesitic rocks, pyroclastic matrix composition, packed packing, hard hardness, and mineralogicalcomposition which tend to have many crystals. In LP 59 and 108 proximal facies found andesite lava.

IDENTIFIKASI JENIS FOSIL POLLEN BERDASARKAN MORFOLOGI LINGKUNGAN PENGENDAPAN DAERAH SUKOMORO DAN SEKITARNYA Elisabet D. Mayasari; Idarwati Idarwati; Stevanus Nalendra
Jurnal Geomine Vol 5, No 3 (2017): Edisi Desember
Publisher : Universitas Muslim Indonesia

Daerah Sukomoro merupakan daerah yang termasuk ke dalam Formasi Palembang Tengah pada Cekungan Sumatera Selatan. Formasi ini dikenal dengan batuan yang terbentuk pada proses pasang-surut air laut. Bukti terjadinya pasang-surut air laut dapat dijumpai oleh kehadiran batugamping yang menjadi indikasi lingkungan pengendapan daerah neritik (laut dangkal) serta dijumpai amber (getah pohon) dengan jarak relatif dekat (± 1km). Berdasarkan analisa paleontologi, tidak dijumpai hadirnya fosil foraminifera pada sampel batugamping. Hal ini semakin menguatkan indikasi lingkungan pengendapan transisi pada daerah penelitian. Berdasarkan hasil analisa fosil pollen dijumpai indikasi kehadiran tumbuhan yang bervariasi mulai dari kelompok gymnospermae (tumbuhan berbiji terbuka hadir pada lingkungan darat), angiospermae (tumbuhan berbiji tertutup hadir pada lingkungan darat) dan pteridopytha (tumbuhan paku-pakuan hadir pada lingkungan darat yang berair) hingga mangrove (tumbuhan penciri daerah rawa). Dengan kehadiran variasi fosil-fosil tersebut, maka diinterpretasikan bahwa lingkungan pengendapannya adalah transisi terutama pada lingkungan intertidal (Henrich, 2007 dalam Mayasari, 2016). Lingkungan pengendapan ini dicirikan oleh morfologi dengan kemiringan lereng yang landai.

MINERALISASI DAN POLA ALTERASI DAERAH LAKEA, KECAMATAN LAKEA KABUPATEN BUOL, PROVINSI SULAWESI TENGAH Idarwati Idarwati
PROMINE Vol 1 No 1 (2013): PROMINE
Publisher : Jurusan Teknik Pertambangan, Fakultas Teknik, Universitas Bangka Belitung

The research area is located in the village of Lakea, Lakea subdistrict, Buol district, Central Sulawesi Province. Constituent Lithology within research area consists of three units, these are litodem lava basalt that mainly be composed by lava andesite and lava basalt which partly fractured, volcanic breccia, and tuff; Sandstone Unit mainly composed by sandstone, mudstone, muddy sandstone, and conglomerate; and the last unit is limestone as Coral Limestone Unit. Alteration assemblage is divided into four zones, namely argillic alteration zone (silicon oxide (kuarsa), magnesium aluminum iron silicate hydroxide, potassium aluminum silicate hydroxide dan sodium calcium aluminum silicate (albit), phyllic alteration zone (serisit/muskovit-kuarsa-klorit-feldspar), propylitic alteration zone (Chlorite-serpentine, Illite, Albite, calcian, ordered, Quartz, Muscovite ), and silicified alteration zone (quartz/silica + adularia + calcit± illite). The mineralization is controlled by open space filling with disseminated distribution. Gold mineralization usually associated with pyrite, chalcopyrite, and galena. Mineralization is found fill the major structural pattern with southeast-northwest direction. The fluid inclusion measurement results obtained that microthermometry Th (homogenization temperature when the fluid trapped in the crystals) ranged from 172 ~ 332 °C with a measurement range from 180.9 to 211.0 °C, and the melting temperature (first ice melting Temperatures / Tm) average ranges -1, 2 to 0.8 C. By calculations, the depth of the formation rate is 79.4 ~ 1712 m, and under pressure about 8.2 ~ 130.3 bar.

Endapan Batuan Volkanik Berdasarkan Data Sistem Informasi Geografi (SIG) Daerah Danau Ranau, Propinsi Sumatera Selatan Idarwati Idarwati
PROMINE Vol 3 No 1 (2015): PROMINE
Publisher : Jurusan Teknik Pertambangan, Fakultas Teknik, Universitas Bangka Belitung

Ranau Lake as the second biggest lake in Sumatra Island. On Plio-Pleistocene Ranau Volcano(Volcano-tectonic) eruption resulted the formation of Ranau Lake. After the great eruption of RanauVolcano, grow up another volcanoes like Seminung Volcano, and become a Ranau Volcanic Complex.At the foot of Seminung Volcano often showed sulfur gas burst activity which are indicated by thedeath of organism in Ranau Lake. The increasing of burst gas and locally earthquacke to be theprinciple one to predict the possibility of volcano eruption for anticipation and decrease the impact ofvolcano eruption. The research objective was to determain the characteristics of rocks formationsurrounding Ranau Lake using Landsat Imagery.

SEBARAN UNSUR TANAH JARANG DI SEBELAH BARAT LAUT LAPANGAN PANAS BUMI GUNUNG LAWU, KARANGANYAR, JAWA TENGAH Dian Rahma Yoni, S.T., M.T.; Intan Paramita Haty; Septyo Uji Pratomo; Setia Pambudi; Afrilta Afrilita; Idarwati Idarwati
Jurnal Ilmiah MTG Vol 13, No 2 (2022): Jurnal Ilmiah MTG Volume 13 No. 2, Desember 2022
Publisher : Jurusan Teknik Geologi Fakultas Teknologi Mineral UPN "Veteran" Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31315/jmtg.v13i3.9394

Sari - Lokasi panas bumi Gunung Lawu terletak di perbatasan Jawa Tengah dan Jawa Timur, Indonesia. Secara spesifik, sumber panas bumi Gunung Lawu pada penelitian ini terletak di sekitar lereng gunung sebelah barat. Hal ini ditandai dengan keberadaan manifestasi berupa air panas pada wilayah Bayanan, Balong dan Ngunut. Manifestasi air panas yang terdapat di permukaan merupakan hasil dari proses interaksi fluida air dengan batuan di bawah permukaan bumi yang kaya akan mineral dan unsur tanah jarang. Sehingga mata air panas yang terbentuk melalui proses ini dapat mengandung unsur tanah jarang dalam jumlah yang signifikan. Penelitian ini bertujuan untuk mengetahui sebaran unsur tanah jarang yang ada di lapangan panas bumi Gunung Lawu khususnya di bagian Barat Laut serta proses interaksi yang terjadi bawah permukaan. Metode yang digunakan untuk mengetahui kandungan unsur tanah jarang dengan menggunakan analisis Inductively Coupled Plasma Mass Spectrometry (ICP-MS). Proses interaksi fluida dengan batuan ditunjukkan oleh beberapa unsur tanah jarang. Belum ada penelitian sebelumnya mengenai interaksi antara batuan dan fluida yang berkaitan dengan unsur tanah jarang di wilayah ini. Oleh karena itu, diharapkan hasil penelitian ini dapat memberikan data dan informasi yang bermanfaat bagi peneliti di masa depan. Kata Kunci: Panas Bumi, Gunung Lawu, Unsur tanah jarang, ICP-MSAbstract - Lawu's geothermal field is located between Central Java and East Java, Indonesia. Specifically, Mount Lawu's geothermal resources in this study are located around the mountain's western slopes. This is marked by the existence of manifestations in the form of hot water in the Bayanan, Balong, and Ngunut areas. The manifestation of hot water found on the surface results from a process of interaction of water fluids with rocks beneath the earth's surface rich in minerals and rare earth elements. So hot springs formed through this process can contain significant amounts of rare earth elements. This study aims to determine the distribution of rare earth elements in the Mount Lawu geothermal field, especially in the Northwest part and the interaction processes that occur below the surface. The method used to determine the content of rare earth elements is by using Inductively Coupled Plasma Mass Spectrometry (ICP-MS) analysis. Some rare earth elements show the process of fluid interaction with rocks. There has been no previous research on the interaction between rocks and fluids related to rare earth elements in this region. Therefore, it is hoped that the results of this study can provide valuable data and information for future researchers. Keyword: Geothermal, Mount Lawu, Rare earth elements, ICP-MS

PETROLOGI BATUBARA FORMASI MUARAENIM, SUB-CEKUNGAN PALEMBANG SELATAN Idarwati Idarwati
Jurnal Ilmiah Geologi PANGEA Vol 5, No 1 (2018): Jurnal Ilmiah Geologi PANGEA
Publisher : PROGRAM STUDI TEKNIK GEOLOGI FAKULTAS TEKNOLOGI MINERAL UPN VETERAN YOGYAKARTA

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31315/jigp.v5i1.5200

Sari – Cekungan Sumatera Selatan merupakan cekungan sedimenter yang mengandung hidrokarbon danbatubara yang terdiri dari empat sub cekungan salah satunya adalah Sub-Cekungan Palembang Selatan.Karakteristik sub-cekungan ini memiliki formasi pembawa lapisan batubara yang sangat produktif yaitu FormasiMuaraenim. Faktor penting dalam produksi batubara dalam kegiatan eksplorasi yaitu peringkat batubara (coalrank). Memahami coal rank berkaitan erat dengan memang terkenal dengan potensi batubara. Salah satuformasi pembawa batubara yang potensial di Cekungan Sumatera Selatan adalah Formasi Muara Enim.Kata-kata Kunci : batubara, Formasi Muara Enim, coal rank

Characteristic and Provenance of Talang Akar Formation Sandstone, Sukamoro Area, South Sumatera Yogie Zulkurnia Rochmana; Idarwati Idarwati; Harnani Harnani; Elisabet Dwi Mayasari
Jurnal IPTEK Vol 27, No 1 (2023)
Publisher : LPPM Institut Teknologi Adhi Tama Surabaya (ITATS)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31284/j.iptek.2023.v27i1.4434

Sukamoro area, Banyuasin Regency, South Sumatera, was the research location. This investigation focuses on the origin of sandstones from the Talang Akar Formation. In the area of investigation, sandstones are widely dispersed and exhibit a variety of properties. Due to the abundance of sandstones found and their high resistance and physical compactness, an analysis of the original rock can be carried out. Generally, the material that makes up sandstone comes from the previous rock. This investigation was undertaken using a descriptive-analytical methodology to determine the origin of the rock. The collected surface data is subsequently petrographically examined. After determining the composition of the constituent minerals, a provenance analysis was conducted to determine that the Talang Akar Formation's sandstones originated from the Magmatic Arc. Furthermore, the Talang Akar sandstone reveals the origin of the Recycle Orogen. Thus, it is considered that the sandstones of the Talang Akar Formation have seen many uplift episodes as a result of tectonic activity, almost to the point where they have experienced an increase in the maturity or stability of their continental block provenances

Co-Authors Aditya N.P.H Afrilta Afrilita Dian Rahma Yoni, S.T., M.T. Elisabet D. Mayasari Elisabet Dwi Mayasari Harnani Harnani Intan Paramita Haty M. Ridho Naufalwan Oke Aflatun Pratomo, Septyo Uji Setia Pambudi Stevanus Nalendra Yogie Zulkurnia Rochmana

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