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All Journal Jurnal Penelitian Pendidikan IPA (JPPIPA) JURNAL PENDIDIKAN TAMBUSAI Prosiding Seminar Teknologi Kebumian dan Kelautan (SEMITAN Journal of Earth and Marine Technology (JEMT) Asian Journal of Social and Humanities
Gomes, Nazario
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Agriculture, Biological Sciences & Forestry Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Civil Engineering, Building, Construction & Architecture Decision Sciences, Operations Research & Management Earth & Planetary Sciences Education Energy Environmental Science Languange, Linguistic, Communication & Media Law, Crime, Criminology & Criminal Justice Materials Science & Nanotechnology Physics Social Sciences Transportation

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ALTERASI MINERALISASI AKIBAT PROSES HYDROTERMAL FORMASI AILEU, DAERAH TIBAR, DILI, ERMERA DAN SEKITARNYA, TIMOR-LESTE Gomes, Nazario
Prosiding Seminar Teknologi Kebumian dan Kelautan Vol 1, No 1 (2019)
Publisher : Prosiding Seminar Teknologi Kebumian dan Kelautan

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (1640.34 KB)

Abstract

Secara fisiografi Timor Leste merupakan daerah pertemuan dua lempeng yang saling bertubrukan yaitu lempeng benua Autralia dan Banda Arc di mana telah terjadi penggangkatan atau uplift. Daerah penelitian termasuk kedalam Zona atau daerah dataran rendah hingga pegununggan bergelombang yang terletak di sebelah utara kota Dili dan selatan Ermera, memiliki batuan penyusun utama berupa, batuan metamorf dan beku. Pulau Timor memiliki tektonik yang menjadi bagian dari Busur Banda. Pada awalnya zona Pulau Timor merupakan zona subduksi, hingga kemudian mengalami evolusi menjadi zona tumbukan. Transisi dari zona subduksi menjadi tumbukan terjadi pada masa Sebelum Miosen. Ekplorasi endapan biji di Timor-Leste dari tahun 1968-an sampai 1990-an selalu didasarkan pada peta geologi lembar Dili yang menjadi acuan buat referensi pada peneliti yang akan meneliti, endapan bijih bahan galian yang mengalami alterasi dan mineralisasi di daerah penelitian tersebut ternyata masi mengalami banyak kelemahan-kelemahan, antara lain Belum adanya peneliti yang melakukan studi yang lengkap mengenai alterasi mineralisasai di daerah timor bagian utara dan baratdaya. Penelitian ini bertujuan untuk mempelajari hubungan antara magmatisme, pola tektonik pulau Timor dan Alterasi, mineralisasi di formasi Aileu,daerah Tibar, Dili, Ermera. Analisis yang digunakan dalam penelitian ini meliputi struktur geologi, Analisis Sayatan Petrografi, sayatan mineralografi, AAS (Atomic Absorbtion Spectophotometric) dan XRD analisis Inklusi fluida. Kesimpulan dalam penelitian ini menunjukkan struktur yang terbentuk pada daerah penelitian adalah kekar dan sesar. Struktur kekar yang terjadi di didaerah Tibar, Dili, Ermera, Timor-Leste lebih dikarenakan oleh aktivitas magmatisme dan tektonik. Gejala struktur sesar yang dapat dijumpai di lapangan berupa bidang sesar, gores garis dan struktur penyerta kekar. Alterasi yang terjadi di daerah Tibar fatuahi dan sekitarnya dibagi menjadi dua tipe yaitu : tipe argilik, dan tipe silisifikasi (silisik). Mineralisasi daerah penelitian banyak terdapat pada batuan yang telah mengalami alterasi, seperti pada material lepas sekis dan filit, sedikit batuan beku, gabro, diorit dengan material ukuran pasir kasar sampai bongkah. Karakteristik alterasi dan mineralisasi formasi Aileu daerah Tibar dan sekitarnya dapat dikelompokan pada tipe mineralisasi “epitermal sulfidasi rendah  
Stereographic for Development of Stricture Pattern of Geological Alteration Zone in Atauro Island, Timor-Leste Gomes, Nazario; Sutarto, Sutarto; Soesilo, Joko; Purwanto, Heru Sigit; Christophe, James
Asian Journal of Social and Humanities Vol. 2 No. 6 (2024): Asian Journal of Social and Humanities
Publisher : Pelopor Publikasi Akademika

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.59888/ajosh.v2i6.274

Abstract

The geological structural patterns and hydrothermal alteration zones of Atauro Island, Timor-Leste, which are influenced by the collision mechanism between the Banda Arc and the Australian Continent, are the subject of this study. The study identifies fault types and alteration zones through stereographic analysis. It indicates the possibility of mineralization in the area. Four alteration zones were identified in this study: argillic, Propylitic, calcosite, and geotite. The analysis results show that left-striking and normal faulting were essential in forming these zones. The mineralization zones, mainly chalcopyrite and chalcocite, are related to the north-northeast trending left horizontal Fault. In addition, this study suggests additional research that includes mineralogy, geochemical, and geophysical analyses to understand more about the characteristics of hydrothermal alteration zones and possible mineralization on Atauro Island. The results of this study are expected to improve our understanding of mineral resources in the region, and it is suggested that this information be considered by authorities responsible for the management of potential natural resources on Atauro Island, Timor.
The mined mass measurement by using drone technology approach in the local scale mining in Tumiyang area, Kebasen District, Banyumas Regency, Central Java, the observation area of CV. Sinergi Karya Solutif Patioran, Adi Reski Surya; Sari, Avellyn Shinthya; Siamashari, Muhammad Abdurrozak; Fathoni, Ahmad Ubaidillah; Julita, Ika Justitia; Gomes, Nazario
Journal of Earth and Marine Technology (JEMT) Vol 2, No 2 (2022)
Publisher : Lembaga Penelititan dan Pengabdian kepada Masyarakat - Institut Teknologi Adhi Tama Suraba

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31284/j.jemt.2022.v2i2.2882

Abstract

In this study, the objective or focal point is the number of reserves that have been mined and how to calculate the volume mined using the Unmanned Aerial Vehicle (UAV) method. In the evaluation of the volume mined using the UAV approach in Tumiyang village, Kebasen sub-district, Banyumas regency, Central Java province, this research was conducted using qualitative and quantitative methods related to the characteristics and modeling of sediment distribution from prospect block exploration. This research was conducted in the even semester of the 2020-2021 academic year, which is between October 2020 to March 2021. Based on the results of the study, it can be concluded that the data collection process using the UAV method requires a short time and complete initial information regarding the condition of the research area is very important for success. aerial photography data collection. The data obtained is aerial photo data and with supporting data such as topography and geology. Based on data processing, the mined volume obtained using supporting software is 32,313.55 m3, while the volume obtained when we calculate manually is 247,050.65 m3.
Studi Petrografi dan Alterasi Batuan Andesit, Dasit Sebagai Wall-Rock pada Daerah Makili Desa Makili, Kabupaten Atauro, Timor-Leste Gomes, Nazario; Christopher, James; Purwanto, Heru Sigit; Sutanto, Sutanto; Sutarto, Sutarto; Soesilo, Joko
Jurnal Pendidikan Tambusai Vol. 8 No. 1 (2024): April 2024
Publisher : LPPM Universitas Pahlawan Tuanku Tambusai, Riau, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31004/jptam.v8i1.13591

Abstract

Penelitian ini bertujuan untuk memahami karakteristik petrografi dan alterasi batuan andesit dan dasit sebagai batuan samping (wall-rock) di daerah Makili, Kabupaten Atauro, Timor-Leste. Metode penelitian yang digunakan mencakup pemetaan geologi permukaan, pengambilan sampel batuan samping yang telah mengalami alterasi, serta analisis laboratorium menggunakan mikroskop polarisasi untuk pengamatan petrografi detail. Hasil penelitian mengungkapkan bahwa Pulau Atauro termasuk dalam Old Volcanic Product dengan litologi berupa lava andesit, breksi, dan tuf pasiran berbatuapung. Umur Old Volcanic Product diperkirakan sekitar 2,99±0,90 juta tahun lalu atau Pliosen-Plistosen. Analisis mineral mengidentifikasi keberadaan mineral utama seperti Quartz (Qz), Plagioklase (Plg), Mineral opak (Oq), Massa gelas (Mg), Mineral Oksida (Ox), Clay mineral (C), Piroksen (PX), K-Feldspar (K-F), Alunite (Al), Pirofilit (Pyr), Diaspor (Dp), dan Serisit (Ser). Selain itu, penelitian ini mengamati kelurusan yang mencerminkan tren struktur dan kedudukan batuan di daerah Atauro, dengan arah kelurusan UBL-STG, BL-TG, BBL-TTG, dan TL-BD. Mineral alterasi yang ditemukan menunjukkan bahwa daerah penelitian termasuk dalam zona alterasi utama, yaitu zona filik dan zona argilik. Studi ini memberikan pemahaman yang lebih mendalam tentang karakteristik petrografi, alterasi, dan struktur batuan samping di daerah Makili, Kabupaten Atauro, Timor-Leste, yang dapat memberikan wawasan tentang geologi regional dan potensi mineralisasi di wilayah tersebut.
Stereographic for Development of Stricture Pattern of Geological Alteration Zone in Atauro Island, Timor-Leste Gomes, Nazario; Sutarto, Sutarto; Soesilo, Joko; Purwanto, Heru Sigit; Christophe, James
Asian Journal of Social and Humanities Vol. 2 No. 6 (2024): Asian Journal of Social and Humanities
Publisher : Pelopor Publikasi Akademika

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.59888/ajosh.v2i6.274

Abstract

The geological structural patterns and hydrothermal alteration zones of Atauro Island, Timor-Leste, which are influenced by the collision mechanism between the Banda Arc and the Australian Continent, are the subject of this study. The study identifies fault types and alteration zones through stereographic analysis. It indicates the possibility of mineralization in the area. Four alteration zones were identified in this study: argillic, Propylitic, calcosite, and geotite. The analysis results show that left-striking and normal faulting were essential in forming these zones. The mineralization zones, mainly chalcopyrite and chalcocite, are related to the north-northeast trending left horizontal Fault. In addition, this study suggests additional research that includes mineralogy, geochemical, and geophysical analyses to understand more about the characteristics of hydrothermal alteration zones and possible mineralization on Atauro Island. The results of this study are expected to improve our understanding of mineral resources in the region, and it is suggested that this information be considered by authorities responsible for the management of potential natural resources on Atauro Island, Timor.
Analysis of Important Factors of Groundwater Availability in Narmada District, West Lombok Regency, West Nusa Tenggara Province Indaryani, Anita Dwi; Wibowo, Dwi Nugroho; Ardli, Erwin Riyanto; Hilmi, Endang; Muslihudin; Hidayat, Syamsul; Gomes, Nazario
Jurnal Penelitian Pendidikan IPA Vol 11 No 1 (2025): January
Publisher : Postgraduate, University of Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/jppipa.v11i1.7031

Abstract

Groundwater utilization in Narmada Regency has increased significantly while its availability is decreasing. This requires management to maintain clean water supply. Research on variables that affect groundwater availability and interactions between them therefore needs to be carried out. Firstly, a Focused Group Discussion (FGD) was held to identify the variables considered important in groundwater management. Respondents then filled out a set of questionnaires expressing their perceptions about the importance of these variables. The variables were grouped into four dimensions namely Input, Output, Domestic Output and non-Domestic Output. Next, respondents' responses were analyzed using the MICMAC structural analysis tool to sort out variables regarding their influence and dependence as well as evaluating the interactions that occured between the variables.  The results showed that there are 7 key variables i.e. Central Government Regulations (PPP). Local Government Regulations (PPD), Rainfall (HUJ), Groundwater Basin (CAT), Forest (HUT), Climate (IK), Number of Population (JP) and 1 regulatory variable ie. Geological variable (GEO) in the groundwater availability system in Narmada District. Also, there exist structured and systematic interactions between dimensions in the system. The results of this study are useful as input in making appropriate regulations for sustainable groundwater in the study area.
Co-Authors Ardli, Erwin Riyanto Avellyn Shinthya Sari Christophe, James Christopher, James Dwi Nugroho Wibowo Endang Hilmi Fathoni, Ahmad Ubaidillah Heru Sigit Purwanto Indaryani, Anita Dwi Julita, Ika Justitia Muslihudin, Muslihudin Patioran, Adi Reski Surya Siamashari, Muhammad Abdurrozak Soesilo, Joko Sutanto Sutanto Sutarto Sutarto SYAMSUL HIDAYAT