Indonesia Conference Directory

Corresponding Author
Lutfi Maulida

Institutions
1) Department of Physics, Faculty of Mathematics and Science, Universitas Negeri Malang, Malang, 65115, Indonesia
2) Advance Material and Mineral Laboratory, Faculty of Mathematics and Science, Universitas Negeri Malang, Malang, 65115, Indonesia

Abstract
The identification of rock magnetic properties by magnetic susceptibility has been done on rock weathering of rip rap in Lahor Dam, Malang regency. The aim of this study was to determine the magnetic properties of weathered and unweathered rocks of basaltic and basaltic andesite by measuring magnetic susceptibility and analysis of magnetic domain distribution. Samples were tested using Bartington Magnetic Susceptibility Meter (MS2B) to determine the value of magnetic susceptibility. The result of susceptibility test shows that low frequency susceptibility (χlf) of the outer part of potentially weathered rock has values ranged from (314-1,068) x 10-8m3kg-1 for basalt with average 601.63 x 10-8m3kg-1 , and the inner part (296-790) x 10-8m3kg-1 , with average 546.28 x 10-8m3kg-1. The average of dependent frequency susceptibility (χfd) for this rock is about 0.703%. Meanwhile for the outer part of basaltic andesite has low frequency susceptibility (χlf) ranged from (343-2,744) x 10-8m3kg-1, with average 1,175.57 x 10-8m3kg-1 , and the inner part ranged from (341-2,681) x 10-6m3kg-1 , with average 808.96 x 10-8m3kg-1. The average of dependent frequency susceptibility (χfd) for this rock is about 0.715%. So it can be concluded that the magnetic susceptibility of the outer part of rock is higher than that of the inner part. There is no differences of magnetic domain distribution between inner and outer part of rock during weathering process and all the samples have a tendency to multidomain magnetic grains (MD).

Keywords
weathering; magnetic susceptibility

Topic
Rock Magnetism

Link: https://ifory.id/abstract/aDKcAj6EJXvp

Corresponding Author
Hafiz Rizaldi

Institutions
a Department of Geophysical Engineering, Faculty of Civil, Environmental and Geo Engineering, Institut Teknologi Sepuluh Nopember, Surabaya 60111, Indonesia
b Faculty of Mining and Petroleum Engineering, Institut Teknologi Bandung, Bandung 40132, Indonesia

Abstract
Karangsambung is one of Indonesia a geological site that has an expert complexity structure. Many outcrop has been unfold here, especially sedimentary rocks. This research has been conducted to determine the pattern of magnetic susceptibility and the status of sedimentary rocks In Gending River, Karangsambung, Central Java. Magnetic susceptibility parameters have been measured by Bartington MS2B from 24 samples that taken in Gending River, Karangsambung. The result shows that the maximum susceptibility is distributed around northward and eastward, while the intermediate and minimum susceptibility are distributed around nortward-eastward and eastward-southward. The measurements show that samples from Kaligending River on waturanda formation had the highest mass-specific magnetic susceptibility values, varying approximately from 1000 to 4000 × 10-8 m3 /kg. Contrarily, samples from the totogan formation had a much lower mass-specific magnetic susceptibility, varying approximately from 1000 to 2000 × 10-8 m3 /kg unexpectedly. The difference in magnetic susceptibility is alleged to the differences between magnetic mineral content in these formations.

Keywords
Karangsambung, Sedimentary Rocks, Magnetic susceptibility

Topic
Rock Magnetism

Link: https://ifory.id/abstract/H9CtRvPKQEWB

Corresponding Author
Satria Bijaksana

Institutions
Faculty of Mining and Petroleum Engineering, Institut Teknologi Bandung, Jalan Ganesa 10, Bandung 40132, Indonesia

Abstract
Magnetic anisotropy, particularly in the form of AMS (anisotropy of magnetic susceptibility) has been used widely for petrofabric and structural studies. It is still a popular technique in wide range of applications due to its high sensitivity as well as for its cost and time effectiveness. The technique has also been modified into various methods termed collectively as anisotropy of magnetic remanence (ARM), while the remanence could be either anhysteretic or isothermal remanences. Notable use of these methods include compaction study in sediment as well as study of flow in lavas. The variation of magnetic anisotropy methods will be compared and reviewed. New findings on the nature of magnetic anisotropy in soft and hard rocks will also be presented. This includes the the incorporation of pore distribution analyses into magnetic anisotropy studies.

Keywords
Magnetic anisotropy, sediment compaction, lava flow, pore distribution

Topic
Rock Magnetism

Link: https://ifory.id/abstract/Bqgp8GvxYL3j

Corresponding Author
M Munasir

Institutions
(a) Physics Department, Research Centre of Mineral and Advanced Material, Faculty of Mathematics and Naturals Science, Universitas Negeri Surabaya. Unesa-Ketintang Campus, Surabaya, Indonesia, 60321.
(*) munasir_physics[at]unesa.ac.id
(b)Physics Department, Faculty of Mathematics and Science, Universitas Negeri Malang, Indonesia, 65145

Abstract
In this paper, we systematically report the characteristics of nanoparticles (NPs)-SiO2 amorphous, and its application for water treatment. NPs-SiO2 can be obtained from natural quartz sand, then extracted and synthesized using the hydrothermal and co-precipitation method. Has an amorphous phase structure; particle size <80 nm, particle formation tends to form the Si-O-Si chain (like a ring), and has a large porosity. High porosity, and is inert and insoluble, is a ceramic material, is an advantage and is very safe to be applied as a water filter material, in the process of water treatment water consumption. This excellent behavior makes NPs-SiO2 able to absorb heavy metals and dyes that are dissolved in water.

Keywords
NPs-SiO2; Amorphous; water treatment; porosity

Topic
Rock Magnetism

Link: https://ifory.id/abstract/Y6NjFmrGaTub

Corresponding Author
Muhammad Rusli Muin

Institutions
Geophysical Engineering, Universitas Tadulako, Palu Sulawesi Tengah

Corresponding author: rusli8998[at]yahoo.com

Abstract
Liquefaction deposits is a well-known process initiated by seismic shaking during strong earthquake. in these soils uniq the opportunities for analyzing these deposits. We applied Magnetic Susceptibility (MS) and Anisotropy of Magnetic Susceptibility (AMS) proxies, to recognize deposits indicative of liquifaction. MS and AMS evidence aid in demonstrating that anomalous soil units are the products of liquifaction event.

Keywords
Liquifaction deposits, Magnetic Susceptibility (MS) and Anisotropy of Magnetic Susceptibility (AMS)

Topic
Rock Magnetism

Link: https://ifory.id/abstract/PhzqgrJXefNj

Corresponding Author
M Munasir

Institutions
(a)Physics Department, Research Centre of Mineral and Advanced Material, Faculty of Mathematics and Naturals Science, Universitas Negeri Surabaya. Unesa-Ketintang Campus, Surabaya, Indonesia, 60321.
(*) munasir_physics[at]unesa.ac.id
(b)Physics Department, Faculty of Mathematics and Science, Universitas Negeri Malang, Indonesia, 65145

Abstract
This work presents a study of structure and the magnetic behavior of magnetic nanoparticles (MNPs) extraction process from natural materials: iron sand. The process of extracting and synthesizing Fe3O4 from iron sand was carried out using the co-precipitation method; with the stages of formation of 2 FeCl3(l) and FeCl2(s) compounds, then proceed with the formation of Fe3O4(s) deposits. Magnetic analysis of MNPs, using VSM, structure analysis using XRD, FTIR and HRPD, and morphology using TEM. MNPs have a magnetite structure (Fe3O4) referring to the results of diffraction analysis (XRD) and FTIR, characterized by the presence of Fe-O functional groups; MNPs Fe3O4 are also superparamagnetic, based on the H-Hysterical curve profile. The particle size of MNPs Fe3O4 belongs to the category of nanoparticles (diameter size 15-20 nm), assuming the shape of particles is spherical, which tends to form agglomerated formations.

Keywords
Magnetite; Nanoparticle; MNPs Fe3O

Topic
Rock Magnetism

Link: https://ifory.id/abstract/mpxALU68J4tQ

Corresponding Author
Muchlis Fajar Hidayat

Institutions
Universitas Negeri Malang

Abstract
Last few years magnetic hydrogel called ferrogel was widely investigated for application in important fields such as in food industry and bio medic. This application is based on good properties which are owned by the ferrogel, for instance, good biocompatibility of the components and stimuli-responsive of the magnetic component. Ferrogel composed by magnetic nanoparticles filler inside the polymer hydrogel. This research focused on Polyvinyl Pyrrolidone/Polyvinyl Alcohol (PVP/PVA) hydrogel polymer with the filler of polyethylene glycol (PEG) MnxFe3-xO4-PEG which is rarely reported. The XRD and SAXS characterizations were used to analyzed the nanostructure of sample. The Mn concentration used was x = 0.6 which has particle size about 11.12 nm analyzed using XRD and has well confirmed with TEM result about 9.9 nm. Analysis using SAXS from ferrogel with filler variations yields primary and secondary particle size about 3.3 and 9.8 nm respectively. The optical properties of MnxFe3-xO4-PEG powder sample characterized using UV-Vis which is shown with the energy gap about 2.24 eV and refractive index 2.79. Using these data, the optical and electrical conductivity can be calculated each about 1.2 × 108 and 70 S. By this analysis then can be the fundamental study for the optical application of MnxFe3-xO4-PEG.

Keywords
Magnetic hydrogel, MnxFe3-xO4-PEG, optical properties, and electrical properties

Topic
Rock Magnetism

Link: https://ifory.id/abstract/6FUBC2f4XqL7

Corresponding Author
Rini Pujiastuti

Institutions
1.Departmen of Physics, Faculty of Mathematics and Science, Universitas Negeri Malang, Malang, 65115, Indonesia
2.Advance Material and Mineral Laboratory, Faculty of Mathematics and Science, Universitas Negeri Malang, Malang, 65115, Indonesia

Abstract
Magnetic susceptibility is a magnetic vulnerability that is often measured in rocks for various purposes. In this study, magnetic susceptibility was applied to distinguish weathering in rocks in different environments i.e. beaches and mountains. The rocks used are igneous rocks originating from Mount Sikambe and rocks on the coast of Prigi beach in Trenggalek Regency. The rock samples taken are rocks that have not undergone weathering, are half weathered and perfectly weathered rocks. The rock was crushed to form like a gravel, then tested magnetic susceptibility (χlf and χhf). The measurement results of rocks that have not decayed to perfect weathering in the mountain area of Sikambe show that the value of low frequency magnetic susceptibility (χlf) has a range of values (521.63-745.76)x 10-8 m3/kg, while in the coastal area Prigi has a range of values (4.65 - 7.72) x 10-8 m3/kg. From the values of χlf and χhf can be calculated the value of frequency dependent susceptibility (χfd). The average fd value in Gunung Sikambe is 0.2%, indicating that magnetic mineral grains are in the range of multi domains (MD) and on the coast of Prigi is about 6.06%, indicating that magnetic mineral grains are in the range of pseudo single domains (PSD) and single domain (SD).

Keywords
Susceptibility Magnetic, Weathering

Topic
Rock Magnetism

Link: https://ifory.id/abstract/73wZa2VQ8kpx