Article Per Year (5 Year)
p-Index From 2020 - 2025
0.408
P-Index
This Author published in this journals
All Journal Buletin Sumber Daya Geologi
Suwahyadi
Unknown Affiliation
Education Energy Engineering Environmental Science

Published : 2 Documents Claim Missing Document
Claim Missing Document
Check
Articles

Found 2 Documents
Search

 1 
SUMBER DAYA DAN KARAKTERISTIK ENDAPAN PASIR BESI DI CIHERAS, KABUPATEN TASIKMALAYA: RESOURCES AND CHARACTERISTICS OF IRON SAND DEPOSITS IN CIHERAS, TASIKMALAYA DISTRICT Teuku Ishlah; Suwahyadi; Dwi Nugroho Sunuhadi
Buletin Sumber Daya Geologi Vol 18 No 3 (2023): 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.v18i3.402

Abstract

Iron is a metal commodity that is widely used in human civilization, and is now used as a raw material for making steel and a mixture of raw materials for cement. Therefore, research activities on iron sand deposits are still needed, especially in ex-mining areas that are interesting for re-examination, because increase of metal price, so decrease the cut off grade for iron sand concentrate mining and the possibility of the presence of other high value minerals. The research location is located in Ciheras Village, Cipatujah District, including Block Ciheras-1, Block Ciheras-2, and Block Cikalong, Cikadu Village, Cikalong District, Tasikmalaya Regency, West Java Province. The aim of this research is to determine the availability, quality and estimation of inferred resources for iron sand deposits. The research used geological mapping methods, and sampling using a hand auger at a distance of 400 meters between drilling points in the direction of the base line and 40 meters in the direction of the cross line. A total of 71 points were drilled to a depth of between 2.0 meters to 4.0 meters and samples of iron sand were taken for laboratory analysis including specific gravity (BJ), magnetic percentage (MD), sieve/grain fraction analysis, grain mineralogy analysis, XRF , AAS, and colorimetry. The calculation results for the iron sand resources of the Ciheras-1 Block are 257,138 tonnes, the Ciheras-2 Block is 512,199 tonnes, and the Cikalong Block is 491,970 tonnes, bringing the total to 1,261,308 tonnes. Average percentage of magnetism in the Ciheras-1 Block; 24.02%, Ciheras-2 Block; 14.7%, and Cikalong Block; 8.01%. These iron sand deposits come from rocks and ash from volcanic eruptions which are transported by river water to estuaries and deposited on beaches. High economic value elements in the form of Titanium and Vanadium in beach sand deposits in the research area whose levels and occurrence are comparable to the element Fe.
KARAKTERISTIK ENDAPAN BIJIH BESI LATERIT PADA BLOK BARAT DAN BLOK TIMUR PT SILO, KABUPATEN KOTABARU, KALIMANTAN SELATAN BERDASARKAN ANALISIS GEOKIMIA DAN MINERALOGI : CHARACTERISTICS OF LATERITE IRON ORE DEPOSIT IN WEST BLOCK AND EAST BLOCK OF PT SILO, KOTABARU DISTRICT, SOUTH KALIMANTAN BASED ON GEOCHEMICAL AND MINERALOGICAL ANALYSIS Putri Ramadhani, Ayumi Hana; Andi Cahyadi; Tatik Handayani; Suwahyadi
Buletin Sumber Daya Geologi Vol 18 No 3 (2023): 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.v18i3.425

Abstract

This research was conducted to identify the characteristics of laterite deposits in the western and eastern blocks of Sebuku Island, Kotabaru Regency, South Kalimantan using field observation methods, and laboratory analysis including titration, XRF, XRD and petrography analysis. The characteristics of the western block laterite deposits are 10 meters until 15 meters deep. The red limonite zone has Fe content of 51.25% with a mineral composition of hematite, magnetite, goethite, ilmenite, spinel. The yellow limonite zone has Fe content of 50.1% with a mineral composition of goethite, hematite, gibsite, ilmenite. The saprolite zone has Fe content of 16.2%, the mineral composition is hematite, chrysotile, goethite, garnet, diopside. The characteristics of the eastern block laterite deposits are that they have a depth of 6 meters until 7.5 meters. The red limonite zone has Fe content of 47.38% with a mineral composition of hematite, goethite, ilmenite, spinel. The yellow limonite zone has Fe content of 38.70% with a mineral composition of goethite, hematite, chromite, gibbsite, spinel. The saprolite zone has Fe content of 15.08%, the mineral composition is hematite, goethite, diopside, fayalite. The bedrock of the research area is in the form of periodotite, namely dunite and harzburgite which have been serpentinized. The mineral composition of the bedrock is olivine, pyroxene, opaque minerals and several secondary minerals, namely serpentine and talc. The west block bedrock has Fe content of around 7.73 % until 8.03% while the east block bedrock has Fe content of around 6.59 % until 7.49%.
Co-Authors Andi Cahyadi Dwi Nugroho Sunuhadi Putri Ramadhani, Ayumi Hana Tatik Handayani Teuku Ishlah