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All Journal Jurnal Geologi dan Sumberdaya Mineral (Journal of Geology and Mineral Resources)
Fitriani Agustin
Pusat Survei Geologi
Chemistry Earth & Planetary Sciences Energy

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Regolith Landform Unit Mapping using Hyperspectral Imaging (Case study: Block G TickHill Mt.Isa, Australia) Fitriani Agustin
Jurnal Geologi dan Sumberdaya Mineral Vol. 17 No. 4 (2016): Jurnal Geologi dan Sumberdaya Mineral
Publisher : Pusat Survei Geologi

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33332/jgsm.geologi.v17i4.10

Abstract

The advent of new hyperspectral has improved the rapid surface mapping of minerals and earth materials. This research is creating the mineral maps using HyMap in Tick Hill Mount Isa Northwest Queensland as a guide for the regolith landform unit mapping.Tick Hill area is part of the Proterozoic Eastern and Western Fold Belt Province of Mt.Isa Inlier Complex. The areas were covered by Mesozoic and Paleozoic lithologies dominated by medium to coarse hornblende-biotite granite and gneiss intruded during 1760 – 1720Ma. Highly weathered landform covered the whole area. The Mesozoic sediments have experienced to deep weathering currently present in the form of mesas. The weathering profiles are dominated by kaolinite, smectite, and pedogenic carbonates with some secondary silicification. Part of the landform was covered by colluvium which varied in thickness from less than 1 meter to up to 12 meter in certain places.The general image processing for HyMap has been done for the area. In addition, ASD spectra laboratory has been applied to validate the remotely sensed mineral information. Iron Oxide and Al-OH (kaolinite, illite, smectite) mineral maps have been successfully created through HyMap imagery. Those can easily identified through the band ratio with some mask application (relative band depth method) in HyMap. For final process, GIS method is used to overlay all the data producing regolith landform unit map. AL-OH mainly kaolinite mineral map is showing the usefulness for identification the surface regolith mapping (mottle zone) and its crystallinity maps can differentiate transported and in situ regolith materials. In addition, Iron oxide map is able to identify ferruginous and laterite surface materials.Keywords: HyMap,Regolith,Mineral Mapping, TickHill,Mt.Isa
Endapan Kipas Aluvial di Daerah Bukitlawang, Sumatra Utara Berdasarkan Interpretasi Citra Landsat ETM7 dan IFSAR Muhammad Luthfi Faturrakhman; Fitriani Agustin
Jurnal Geologi dan Sumberdaya Mineral Vol. 18 No. 1 (2017): Jurnal Geologi dan Sumberdaya Mineral
Publisher : Pusat Survei Geologi

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33332/jgsm.geologi.v18i1.81

Abstract

Bukitlawang alluvial fan deposit formed, North Sumatra is one of the geomorphological aspect that can be observed in landsat and radar images.  Flow direction of the alluvial fan is  from west to east with having the total distribution of 77 Km2. Sumatra fault which is located at the eastern side of it plays a major role in the formation of alluvial fan deposit in this area. The type of alluvial fan is debris flow with the primary sedimentary process is a debris flow deposit.Keyword : Bukitlawang alluvial fan, Sumatra fault, Geomorphology, Radar – Landsat images.
Volkanostratigrafi Inderaan Jauh Kompleks Gunungapi Gede dan Sekitarnya, Jawa Barat, Indonesia Fitriani Agustin; Sutikno Bronto
Jurnal Geologi dan Sumberdaya Mineral Vol. 20 No. 1 (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.v20i1.386

Abstract

Remote sensing technology greatly helps to identify the various of volcano features, including active, old and ancient volcanoes. The aim of this  paper is intended to introduce various volcanic features in the Gede Volcano Complexs (GVC) and souronding area; compose volcanostratigraphy; and estimate the history of the volcanoes. The method used is a visual interpretation 9 meters spatial resolution of Digital Elevation Model (DEM) TerraSar-x image. Indonesian Stratigraphy Nomenclature Guide 1996 was implemented in vocanostratigraphy unit classification, involving Arc, Super Brigate, Brigate, Crown and Hummockly. Based on the interpretation the DEM image, volcanostratigraphic unit the Gede Volcano Complex consists of Bregade Masigit (Br. M.), which consists of Joklok (Gm.J.) and Gegerbentang (Gm.G.) Hummocs; Crown Lingkung (Kh.L.) consisting of Pangrango (Gm.P.), Situ Gunung (Gm Sg.), Cikahuripan (Gm.Ck.), Pasir Prahu (Gm.Ph) Hummocs; Gege Crown (Kh.G.), which is located in the east of Lingkung Crown. The Gede Crown consists of Gumuruh humock (Gm.Gh.), Gunung Gede lava flows (LG 1,2,3,4,5), and giant debrise avalances (gv-G). The geological mapping based volcanostratigraphy is very useful for exploration of mineral and energy resources, as well as geological hazards.Keywords : volcanostratigraphy, DEM TerraSar-x image, Gunung Gede Complexs.DOI: 10.33332/jgsm.2019.v20.1.9-16
Seismotectonic, Potential Seismic and Volcano Hazard of Minahasa Peninsula, Eastern Indonesia Asdani Soehaimi; Tatang Padmawidjaja; S.R Sinung Baskoro; Fitriani Agustin; Mohamad Ridwan
Jurnal Geologi dan Sumberdaya Mineral Vol. 23 No. 2 (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.v23i2.683

Abstract

The Minahasa Peninsula is located in the western flank of Mollucca seismotectonic zone existed, where are four active tectonic plates colliding from east to west are the Philippine Oceanic Plate, Halmahera Micro Continental Plate, Mayu Ridge Micro Oceanic Slab Plate and the Minahasa Peninsula Micro Continental Plate. The result of the probabilistic seismic hazard assessment in Manado City and surrounding area, Zone I (site class SE), Zone II (site class SD) and Zone III (site class SC), shows the building and non building for risk category I, II, III and IV, has the seismic disign category D. Building and non building in Zone I (SD1=0,80g) with risk category I, II, III has structure seismic design category E and risk category IV has seismic design category F.The correlation of seismotectonic, structural geology, and seismicity to the volcanic centers distribution in this region, shows the Minahasa Peninsula volcanoes can be divided into two regions are the compressional and extentional volcanoes tectonic regions. To mitigate the seismic risk in this region, the structure for building and non building contraction is recommended to follow the procedures for planning earthquake resistance for building structures and non building (BSN, SNI 1726-2019). On another hand, for potential volcano hazard, recommended followed the guidance map of the volcanic hazard prone region by The Center for Volcano and Geological Hazard Mitigation, Geological Agency of Indonesia.Keywords: Mollucca seismotectonic zone, potential seismic and volcanoes hazard.
Co-Authors Asdani Soehaimi Mohamad Ridwan Muhammad Luthfi Faturrakhman S.R Sinung Baskoro Sutikno Bronto Tatang Padmawidjaja