Claim Missing Document
Check
Articles

Morphotectonics of Mount Rendingan Area Related To the Appearances of Geothermal Surface Manifestations Dewi Gentana; Nana Sulaksana; Emi Sukiyah; Euis Tintin Yuningsih
Indonesian Journal on Geoscience Vol 6, No 3 (2019)
Publisher : Geological Agency

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.17014/ijog.6.3.291-309

Abstract

DOI: 10.17014/ijog.6.3.291-309The researched area is situated at Mount Rendingan and its surrounding area, Lampung Province, the southern part of Sumatra Island. It has a big potential of geothermal resource in line with a unique graben like bowl landform and geothermal surface manifestations. This research was carried out using remote sensing and field observation methods. The remote sensing method used topography and Shuttle Radar Topography Mission -Digital Elevation Model (SRTM-DEM) maps to analyze morphotectonic attributes, and the result was validated by morphotectonic data analysis from field observation. The purpose of this research is to evaluate the relation between morphotectonic and the appearances of geothermal surface manifestations. The interpretation of SRTM-DEM and topographic maps are supported by morphotectonic analyses,which indicate that the geothermal surface manifestations in this area are controlled by tectonic activity. It has various levels of lift which are shown by the values of valley height weight ratio (Vf) from 0.16 to 3.31 and the values of mountain front sinuosity (Smf) from 1.05 to 2.09. The morphotectonic characteristics can describe the geological structure activity levels which are reflected in the landform and its rock. The volcanic areas consist of igneous rocks which have small primary permeabilities. However, the development of geological structure can cause fractures in the rock that step in as a medium for passing geothermal fluid from depth to surface. They are found on the fault intersection zone system trending NE-SW and NW-SE, NNE-SSW and NNW-SSE, and WE system directions that indicate the fault system is correlated with the appearances of geothermal manifestations.
Tectonic Control of the Nanggulan Formation Based on Morphometric Analysis in Kulon Progo, Indonesia Winarti Winarti; Emi Sukiyah; Ildrem Syafri; Andi Agus Nur
Indonesian Journal on Geoscience Vol 9, No 2 (2022)
Publisher : Geological Agency

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.17014/ijog.9.2.147-157

Abstract

DOI:10.17014/ijog.9.2.147-157Outcrop of Nanggulan Formation, surrounded by Old Andesite Formation (OAF) in the eastern part of Kulon Progo Dome, is very limited. Tectonic control is interpreted as a contributing factor. Tectonic activity can be shown by a morphometric aspect. The research purpose was to calculate the valley floor - valley height ratio, stream gradient index, and drainage density of Nanggulan and Old Andesite Formations. The method used is field survey and Shuttle Radar Topography Mission analysis. The field survey focused on Clumprit, Klepu, and Kalisonggo Rivers. The total number of valley segments for the Nanggulan Formation is 223 with the valley length of 4.62 km, while OAF is 101 with a valley length of 3.55 km. SRTM analysis showed that the valley segment in OAF was 55, and valley length was 1.48 km. The valley floor - valley height ratio measured in the Nanggulan Formation is ten valleys and OAF is eight valleys. In Nanggulan Formation, the valley floor - valley height ratio value is from 1.00 to 5.46 (low uplift), whilst in OAF, the results vary: as 1.35 to 4.58 (low uplift), 0.59 (medium uplift), and 0.43 (high uplift). The stream gradient index value of the Nanggulan Formation is 460.47 (medium tectonic), while OAF is 723.84 (high tectonic). The drainage density value of the Nanggulan Formation is 10.35 km/km2 (very smooth landscape texture) and OAF is 10.35 km/km2 (somewhat smooth landscape texture). Morphometry proves that Nanggulan Formation tectonic activity is more active, causing the Nanggulan Formation to be exposed to the surface.
The Investigation of Ultic Horizon on Andisols Derived from the Eruption of Mount Tilu (Pleistocene, Basaltic) in West Java, Indonesia Rina Devnita; Emi Sukiyah; Apong Sandrawati
Indonesian Journal on Geoscience Vol 9, No 2 (2022)
Publisher : Geological Agency

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.17014/ijog.9.2.159-172

Abstract

DOI:10.17014/ijog.9.2.159-172Ultic is the soil characteristics in soil taxonomy when argillic or kandic horizon is found within the depth of 125 cm with the base saturation of less than 35 % on the overall of upper 50 cm. The purpose of this research is to investigate whether ultic horizon was found in the soil developing from the Pleistocene eruption of Mount Tilu (basaltic parent materials), in West Java, Indonesia. The method used was descriptive and comparative surveys of three profiles in the area around Mount Tilu, including the investigation of andic soil properties and the formation of argillic or kandic horizon. The result showed that the soils fulfilled the requirements of andic soil properties to be classified as Andisols. Soil never dried for ninety days cumulative (udic) to be classified as Udands. There were Fulvudands and Hapludands in this location. Accumulation of clays was more than 1.2% higher than the overlying horizon found at the depth of 90, 79, and 51 cm in those three profiles. Base saturation in upper 50 cm ranged from 1.07 to 6.86 cmol kg-1 or less than 35 %, making the soils were classified as Ultic Fulvudands and Ultic Hapludands. The high rainfall in the tropics and Pleistocene age led to the leaching of clays for a long period to form the argillic horizon. The influence of rain was stronger than the basaltic parent materials in forming Ultic Hapludands. Basaltic parent material was not strong enough to produce base saturation of more than 35 %.
Karakteristik fisika air tanah dan air permukaan serta hubungannya dengan kondisi geologi di lereng selatan Gunung Manglayang, Sumedang, Jawa Barat Moch Ridfan Trisnadiansyah; Yudhi Listiawan; M. Nursiyam Barkah; Emi Sukiyah; Mohamad Sapari Dwi Hadian
Jurnal Pendidikan Geografi: Kajian, Teori, dan Praktek dalam Bidang Pendidikan dan Ilmu Geografi Vol 27, No 1 (2022)
Publisher : Universitas Negeri Malang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.17977/um017v27i12022p88-101

Abstract

The research area is located on the southern slope of Mount Manglayang administratively, including the Jatinangor area, Sumedang, which is the location of various universities. This makes the Jatinangor area develop into a new center of economic growth and education so that the demand for groundwater and surface water for the surrounding population also increases. The purpose of this study was to determine the characteristics of groundwater and surface water and their relationship with local geological conditions. Hydrogeological mapping was carried out by measuring the parameters of the physical properties of water to determine the characteristics of water. Meanwhile, geological conditions in the form of secondary data are processed into slope parameters, lineament density, and rock units. The results showed that the groundwater-surface water group was divided into three groups, namely group one (upstream), group two (middle watershed), and group three (downstream). The results also show a close relationship between geological conditions and groundwater-surface water, especially morphological and lithological factors. This research is useful in developing the treasures of knowledge and applications in lecture activities. The practice carried out can be applied in lectures so that they can connect theoretical and practical needs.Lokasi penelitian terletak di lereng Selatan Gunung Manglayang yang secara administratif termasuk wilayah Jatinangor, Kabupaten Sumedang yang menjadi lokasi dari berbagai perguruan tinggi. Hal ini menjadikan wilayah Jatinangor berkembang menjadi pusat pertumbuhan ekonomi dan pendidikan baru sehingga kebutuhan air tanah dan air permukaan untuk penduduk sekitar juga meningkat. Tujuan dari penelitian ini adalah untuk menentukan karakteristik air tanah dan air permukaan serta hubungannya dengan kondisi geologi setempat. Pemetaan hidrogeologi dilakukan dengan mengukur sifat fisik air untuk mengidentifikasi karakteristik air. Sementara itu, kondisi geologi berupa data sekunder yang diolah menjadi parameter kemiringan lereng, densitas kelurusan dan satuan batuan. Hasil penelitian menunjukkan bahwa kelompok air tanah-air permukaan terbagi menjadi tiga, yaitu kelompok satu umumnya berada di hulu DAS, kelompok dua umumnya berada di tengah DAS, dan kelompok tiga berada di hilir DAS. Hasil penelitian juga menunjukkan adanya hubungan yang erat antara kondisi geologi dan air tanah-air permukaan khususnya pada faktor morfologi dan faktor litologi. Penelitian ini bermanfaat mengembangkan khasanah pengetahuan dan aplikasi dalam aktivitas perkuliahan. Praktik yang dilakukan dapat diterapkan dalam perkuliahan sehingga mampu menjembatani kebutuhan teoritis dan praktis.
ANALISIS ZONASI LAHAN USAHA TAMBANG MENGGUNAKAN METODE K-MEANS CLUSTERING BERBASIS SISTEM INFORMASI GEOGRAFI Muhammad Lutfi; Emi Sukiyah; Nana Sulaksana
Jurnal Teknologi Mineral dan Batubara Vol 15, No 1 (2019): Jurnal Teknologi Mineral dan Batubara Edisi Januari 2019
Publisher : Puslitbang tekMIRA

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (1189.238 KB) | DOI: 10.30556/jtmb.Vol15.No1.2019.978

Abstract

Pembangunan berbagai sektor perekonomian di Indonesia memanfaatkan setiap ruang yang memberi dampak positif dan negatif. Perencanaan pembangunan Daerah Tingkat II yang disesuaikan dengan karakteristik, potensi dan kebutuhan daerahnya memanfaatkan sumberdaya mineral yang ada secara optimal. Oleh karena itu perlu dibuat suatu zonasi kawasan pertambangan, dengan pendekatan analisis spasial dan mempertimbangkan beberapa parameter agar tidak terjadi tumpang tindih dengan sektor lain. Penentuan zonasi lahan usaha tambang telah banyak dilakukan, di antaranya menggunakan metode statistik K-Means Clustering yang berbasis sistem informasi geografi (SIG). K-Means Clustering adalah metode pengujian pengelompokkan potensi bahan tambang di satu wilayah berdasarkan kriteria keruangan (spasial) yang mengacu kepada karakteristik bukan keruangan (non-spasial). Hasil analisis menunjukkan bahwa zonasi kawasan pertambangan dikelompokkan ke dalam tiga kelompok yaitu kelompok 1 dengan persentase 60,99%, kelompok 2 sebesar 20,63% dan kelompok 3 sebesar 16,38%. Metode ini dapat digunakan untuk memilah suatu daerah yang berpotensi bahan tambang untuk dijadikan lahan usaha tambang serta dapat dialokasikan untuk suatu Wilayah Pertambangan (WP).
ALTERASI HIDROTERMAL GUNUNG RENDINGAN BERDASARKAN ANALISIS PETROGRAFI DAN X-RAY DIFFRACTION (XRD) Dewi Gentana; Nana Sulaksana; Emi Sukiyah; Euis Tintin Yuningsih
Buletin Sumber Daya Geologi Vol. 13 No. 3 (2018): Buletin Sumber Daya Geologi
Publisher : Pusat Sumber Daya Mineral Batubara dan Panas Bumi

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (2520.631 KB) | DOI: 10.47599/bsdg.v13i3.231

Abstract

Daerah penelitian terletak di daerah panas bumi Gunung Rendingan, Kabupaten Tanggamus, Provinsi Lampung. Daerah penelitian dipengaruhi oleh Sesar Semangko, mempunyai pola sesar berarah Barat Laut -Tenggara dan Timur Laut – Barat Daya. Penelitian bertujuan untuk mengetahui himpunan mineral alterasi berdasarkan analisis petrografi dan X-Ray Diffraction (XRD). Analisis petrografi digunakan untuk mengetahui mineral alterasi sebagai indikator temperatur dan fluida hidrothermal di daerah penelitian. Analisis XRD dilakukan untuk mengindentifikasi jenis mineral lempung. Berdasarkan analisis petrografi dan XRD pada batuan permukaan di daerah penelitian menghadirkan mineral kelompok lempung yang terdiri dari smektit, ilit, serisit dan kaolinit. Hasil analisis petrografi dan XRD terhadap serbuk bor (cutting) dari sumur  XD-1, XD-2 dan XD-3 memperlihatkan  himpunan mineral alterasi hidrotermal smektit-kaolinit-serisit dan ilit-epidot pada sumur XD-1, himpunan mineral serisit-smektit, smektit-ilit dan  ilit-epidot pada sumur XD-2, himpunan mineral smektit-kaolinit dan ilit-smektit-epidot pada sumur XD-3. Berdasarkan himpunan mineral alterasi tersebut dapat diperkirakan temperatur bawah permukaan di daerah penelitian berkisar 150°-300°C pada kedalaman 700 – 1900 mKu sebagai zona reservoir. Kehadiran mineral kalk-silikat yaitu epidot bersama wairaikit dan prehnit sebagai indikator zona reservoir memiliki temperatur yang baik. Batuan di daerah penelitian memiliki permeabilitas yang baik dengan kehadiran mineral adularia.
Model Sebaran Limbah Batubara di Rawa Kalimati, Kecamatan Babakancikao, Kabupaten Purwakarta, Provinsi Jawa Barat Moch Ridfan Trisnadiansyah; Mohamad Sapari Dwi Hadian; Emi Sukiyah
Dinamika Rekayasa Vol 18, No 2 (2022): Jurnal Ilmiah Dinamika Rekayasa - Agustus 2022
Publisher : Jenderal Soedirman University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20884/1.dr.2022.18.2.487

Abstract

Limbah batubara merupakan limbah yang mengandung unsur logam berat dan dikategorikan sebagai bahan berbahaya dan beracun. Rawa kalimati yang terletak di Desa Cilangkap, Kecamatan Babakancikao berdekatan dengan aliran sungai citarum dan area persawahan warga. Selain itu, rawa kalimati juga berada di samping industri serat rayon yang memakai bahan bakar batubara untuk menunjang proses produksi. Hal ini menjadi potensi adanya pencemaran dan masalah lingkungan. Penelitian ini bertujuan untuk mengidentifikasi sebaran limbah batubara dan estimasi volume timbunannya sehingga langkah pemulihan fungsi lingkungan dapat berjalan dengan baik. Metode penelitian berupa pemboran inti dan pemboran tangan di beberapa titik lokasi, pengukuran permeabilitas dan pemodelan material timbunan ataupun batuan. Hasil penelitian menunjukkan bahwa limbah batubara tersebar di area blok-blok timbunan, lapisan bawahnya tersusun oleh lempung dan lanau dengan ketebalan beragam dan bagian selatan pada kedalaman dasar bor terdapat akuifer di lapisan batupasir. Nilai permeabilitas tinggi berada di lapisan batupasir yang bertindak sebagai akuifer, sedangkan permebilitas rendah berada di lapisan lempung yang berada di atasnya. Hasil estimasi perhitungan volume limbah sebesar 88.118,26 m3 yang menempati area seluas 38.544,72 m2.
The geothermal potentials for electric development in Maluku Province Vijaya Isnaniawardhani; Emi Sukiyah; Adjat Sudradjat; Martha Magdalena Nanlohy
Jurnal Perspektif Pembiayaan dan Pembangunan Daerah Vol. 5 No. 3 (2018): Jurnal Perspektif Pembiayaan dan Pembangunan Daerah
Publisher : Program Magister Ilmu Ekonomi Pascasarjana Universitas Jambi

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (458.883 KB) | DOI: 10.22437/ppd.v5i3.4546

Abstract

The characteristic of small to medium size islands is the limited amount of natural resources for electric generation. Presently the needs of energy in Maluku Province are supplied by the diesel generation units. The electricity distributes through an isolated grid system of each island. There are 10 separate systems in Maluku Province, namely Ambon, Namlea, Tual, Saumlaki, Mako, Piru, Bula, Masohi, Dobo and Langgur. From the geothermal point of view, this condition is suitable because the nature of the generation is small to medium and the locations are dispersed. The geological condition of Maluku Province is conducive for the formation of geothermal resources. The advanced utilization of geothermal energy in Maluku Province is in Tulehu located about 8 kilometers NE of Ambon. It is expected that 60 MW electric will be produced at the first stage in 2019. A total of 100 MW resources were estimated. Other places of geothermal potentials are Lauke and Tawen both located in Ambon Island with the potentials of 25 MW respectively. In Oma Haruku, Saparua and Nusa Laut the geothermal potentials were estimated to be 25 MW each. The total amount of geothermal energy in Maluku Province is thus, 225 MW which will contribute significantly to the needs of projected 184 MW in the year 2025.
The geologic potentials of Riau Islands Province and its development design Emi Sukiyah; Vijaya Isnaniawardhani; Adjat Sudradjat; Fery Erawan
Jurnal Perspektif Pembiayaan dan Pembangunan Daerah Vol. 5 No. 3 (2018): Jurnal Perspektif Pembiayaan dan Pembangunan Daerah
Publisher : Program Magister Ilmu Ekonomi Pascasarjana Universitas Jambi

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (482.941 KB) | DOI: 10.22437/ppd.v5i3.4554

Abstract

Geologically Riau Islands is located in the topography of the old stadium erosion. The morphology is characterized by smooth hills with convex slopes and alluvial plain consisting of the erosion products. The morphology exhibits the remnants of peneplain that submerged at ca 13,000 BP now forming Sunda Shelf with the average depth of 120 meters. The irregular coast’s line of almost all the islands in Riau Islands characterized the submerged old morphologic stadium. The lithology consists of granites and metasediments. Granites contain various types of economic minerals. The weathered granites produce bauxite, kaolin and quartz sands. The metasediments are generally soft resulting in the formation of valleys suitable for agriculture and settlements due to the availability of surface and subsurface water. Irregular coastal line provides the bays for harbors. The geological potentials to be developed therefore consists of the provision of stable plain and resistance to landslide and earthquake, the bays suitable for various marine industries, granites for building materials, and base metals. The submarine hydrocarbon basins produce oil and gas. Geologically Riau Islands is very unique because it represents the remnants of the peneplain of Jurassic and Cretaceous age of about 63 to 181 years old now becoming the Sunda shelf which is the largest in the world. This region is very good when developed as an industrial area, trade, and marine tourism Keywords: Riau Islands, geologic potentials, granites, submerge, marine tourism
PENDUGAAN STRUKTUR BAWAH PERMUKAAN DI DAERAH BAGIAN TENGAH DAS CISADANE DENGAN MENGGUNAKAN DATA GRAVITY Suherman Dwi Nuryana; Novi Triany; Dyah Ayu Setyorini; Karyono HS; Nana Sulaksana; Emi Sukiyah
Journal of Geoscience Engineering & Energy (JOGEE) VOLUME 1, NOMOR 2, AGUSTUS 2020
Publisher : Universitas trisakti

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (3153.907 KB) | DOI: 10.25105/jogee.v1i02.7685

Abstract

Daerah Aliran Sungai (DAS) Cisadane merupakan wilayah yang pembangunannya berkembang sangat pesat. Tingginya aktivitas pembangunan tersebut menjadikan pemahaman kondisi bawah permukaan aliran sungai Cisadane perlu untuk dipelajari. DAS Cisadane termasuk dalam Cekungan Jakarta bagian Barat, tersusun oleh endapan aluvium, delta dan material gunungapi serta batuan tua yang berumur Tersier. Tujuan penelitian untuk mengetahui struktur bawah permukaan yang ada di bagian tengah DAS Cisadane. Metode gaya berat digunakan untuk mengidentifikasi keberadaan struktur bawah permukaan berdasarkan kontras densitas batuannya. Analisis struktur bawah permukaan dilakukan melalui interpretasi dari peta anomali Bouguer dan anomali residual serta model dua dimensi gayaberat. Hasil penelitian mempelihatkan nilai anomali Bouguer antara 47.0 sampai 70.4 mGal. Anomali di bagian utara dan selatan relatif lebih rendah daripada bagian tengah, menunjukkan bahwa basement di bagian utara dan selatan lebih dalam dibandingkan di bagian tengah. Penampang model gayaberat dibuat dalam 3 lapisan, dengan densitas 1.9 mGal berupa sedimen kuarter, 2.2 mGal sedimen Tersier dan batuan dasar 2.67 mGal. Pola struktur bawah permukaan DAS Cisadane bagian tengah berupa sesar mendatar yang berarah baratlaut-tenggara.
Co-Authors abdurrohman, Muhammad jihad Achmad Sjafrudin, Achmad Adjat Sudradjat Adjat Sudradjat Adjat Sudradjat Adjat Sudradjat Agung Mulyo Agus Didit Haryanto -, Agus Didit Haryanto Alam, Boy Yoseph Cahya Sunan Sakti Syah Algi Fajar Ghaniansah, Algi Fajar Andi Agus Nur Andi Makawaru Yasin, Andi Makawaru Andriana Sendjaja, Yoga Apong Sandrawati Arif R. Darana Arifin Anfasha, Arifin Arya, Pulung P Asep Nursalim, Asep Athanasius Cipta Aton Patonah, Aton Bani Nugroho, Bani Benny Joy Boy Yoseph Cahya Sunan Sakti Syah Alam Budi Muljana Cipta Endyana Daliman, Shaparas Binti Denny Lumban Raja Dewi Gentana Dewi Gentana Dicky Muslim Dina Tania Donny R. Wahyudi Dwi Purnomo Dyah Ayu Setyorini Edi Prasetyo Utomo Edi Tri Haryanto Edi Tri Haryanto, Edi Tri Edy Sunardi Endah, Raras Euis Tintin Yuningsih Euis Tintin Yuningsih Fachrudin, Kurnia Arfiansyah Fahira, Ghina Fery Erawan Fery Erawan Fikri Abdulah, Fikri GANI, REZA MOHAMMAD GANJAR Gentana, Dewi Gentana, Dewi Gentana, Dewi Gilang Firmansyah, Gilang Hendarmawan H Hendarmawan Hendarmawan Hendarmawan Hendarmawan, Hendarmawan Herry Riswandi HS, Karyono Ildrem Syafri Iyan Haryanto Iyan Haryanto, Iyan Jamal Jamal Jamal Jamal Jassin, A.M.I. Johanes Hutabarat Johanes Hutabarat Karyono HS Khoirullah, Nur kurnianto, brany M. Nursiyam Barkah Makkawaru, Andi Martha Magdalena Nanlohy Mawardi, Sonny Mega Fatimah Rosana Moch Ridfan Trisnadiansyah Mohamad Sapari Hadian Muhamadsyah, Faisal Muhammad Lutfi Mulyono - Nana Sulaksana Nana Sulaksana Nana Sulaksana Nana Sulaksana Nana Sulaksana Nana Sulaksana Nana Sulaksana Nendi rohaendi Nisa Nurul Ilmi Novi Triany Nurfadli, Eza Patonah Aton Pradnya P. Raditya Rendra Pradnya P. Raditya, Pradnya P. Pradnya Paramarta Raditya Rendra Puguh Setiyanto, Puguh Pulung Arya Pranantya Pulung Arya Pranantya, Pulung Arya putera, alvindo andreansyah Raden Irvan Sophian, Raden Irvan Ramadian, Aldrin Retnoningtyas, Widya Ika Ridwan, Panji Rina Devnita Rina Devnita Rita Yulianti, Rita Sabila, Zahra Syahida sabily, zulfa Sambodo, Tri Hananto Sambodo, Tri Hananto Priyo Saragih, Rahmat Yantono Setyorini, Dyah Ayu Siahaan, Yakub Sipahutar, Sumahang R. SIRAJU, ASRUL Sonny Mawardi Sri Wahyuni Subagja, Agam Suherman Dwi Nuryana Suherman Dwi Nuryana Sukardan Tawil Sulaksana, Nana Sulastri, Murni Sumaryono Sumaryono Suratman Suratman Syalsabilla, Lola Lintang Taat Setiawan, Taat Tresnasari, Endah Undang Mardiana Vijaya Isnaniawardhani Wahyuzi, Radhi Winantris Winantris Winarti Winarti Witjahjati, Retno Yoga Andriana Sendjaja Yuda, Himmes Fitra Yudhi Listiawan Yusuf, Muhammad Farhan Yuyun Yuniardi Zakaria Zufialdi Zakaria, Zulfiadi Zufialdi Zakaria, Zufialdi