scholarly journals INTERPRETASI POLA PENYEBARAN BATUAN DAN DAERAH TERAKUMULASI AIR TANAH MENGGUNAKAN METODE MAGNETIK DESA OEMATNUNU KABUPATEN KUPANG

2020 ◽  
Vol 5 (2) ◽  
pp. 133-138
Author(s):  
Oktavianus Kette ◽  
Hadi I. Sutaji ◽  
Bernandus Bernandus
Keyword(s):  
Magnetic Field ◽  
Distribution Patterns ◽  
Magnetic Method ◽  
Total Magnetic Field ◽  
The North ◽  
Rock Structure ◽  
Pattern Distribution ◽  
Proton Precession Magnetometer ◽  
Moderate Magnetic Field ◽  
Low Magnetic Field

Abstrak Telah dilakukan penelitian interpretasi pola penyebaran batuan dan daerah terakumulasi air tanah menggunakan metode magnetik di Desa Oematnunu Kabupaten Kupang. Tujuan penelitian ini untuk mengetahui pola sebaran batuan dan daerah terakumulasinya air tanah serta membuat pemetaannya. Akuisisi data dilakukan dengan Proton Precession Magnetometer (PPM) tipe GSM–19T dan data yang diperoleh berupa nilai medan magnet total serta variasi harian yang diolah serta diinterpretasikan secara kualitatif dan kuantitatif. Interpretasi kualitatif menunjukkan nilai anomali medan magnet total berkisar -250 nT sampai 450 nT dan terbagi atas anomali medan magnet rendah pada kisaran -250 nT sampai -10 nT, anomali medan magnet sedang dengan kisaran nilai -10 nT sampai 110 nT serta anomali medan magnet tinggi di kisaran 110 nT sampai 450 nT. Untuk  interpretasi kuantitatif menunjukkan struktur batuan yang diduga berupa batu pasir (aquifer) berada di bagian utara hingga barat laut dengan kedalaman sekitar 0 m - 100 m. Kata kunci: Metode magnetic; suspeptibilitas; akuifer; Oematnunu Abstract Interpretation of rock distribution patterns and areas groundwater accumulation using magnetic methods in Oematnunu Village Kupang District. The purpose of this research was to determine the pattern distribution of rocks and areas of groundwater accumulation and to make the mapping. The acquisition data was carried out by using the GSM-19T Proton Precession Magnetometer (PPM) and the data obtained in the form of total magnetic field values and daily variations were processed and interpreted qualitatively and quantitatively. The qualitative interpretation shows the total magnetic field anomaly values ranging from -250 nT to 450 nT and is divided into low magnetic field anomalies in the range -250 nT to -10 nT, moderate magnetic field anomalies with values ranging from -10 nT to 110 nT, and high magnetic field anomalies. in the range 110 nT to 450 nT. For quantitative interpretation, it shows the rock structure which is thought to be sandstone (aquifer) in the north to the northwest with a depth of about 0 m - 100 m.Keywords: Magnetic method; suspension; aquifer; Oematnunu

scholarly journals Application of magnetic method for mapping buried structures around archaeological site of Masjid Tuha Indrapuri

2020 ◽  
Vol 20 (2) ◽  
pp. 31-35
Author(s):  
CUT INTAN KEUMALA ◽  
TOMI AFRIZAL ◽  
MUHAMMAD SYUKRI SURBAKTI ◽  
NAZLI ISMAIL
Keyword(s):  
Magnetic Field ◽  
Field Data ◽  
Archaeological Site ◽  
Magnetic Method ◽  
Buried Structures ◽  
Entire Area ◽  
Magnetic Field Data ◽  
Total Magnetic Field ◽  
Aceh Province ◽  
Reduction To The Pole

Magnetic gradiometer survey has been conducted on the yard of the archaeological site of Masjid Tuha Indrapuri, Aceh Besar Regency, Aceh Province. The site is one of the oldest mosques erected during the Aceh Sultanate period. Magnetic method was applied for mapping archaeological structures buried beneath the surface. Total magnetic field data were measured using Proton Precession Magnetometer with grid spacing of 2 meters between stations covering the entire area of the site. Diurnal and international geomagnetic reference field data were corrected to the measured data in order to calculate total magnetic field anomalies that were influenced by the buried magnetic objects. The total magnetic field anomalies distribution shows two elongated structures with U-shaped patterns surrounding the mosque. The patterns are also revealed in reduction to the pole and derivative vertical filters of the total field anomaly data. The anomaly patterns are considered a response from the rest of the buried fences that were built around the mosque in the past.

scholarly journals Interpretation of Near Surface Based on the Magnetic Data at Geothermal Area, Jaboi, Sabang

2019 ◽  
Vol 8 (3) ◽  
pp. 90-93
Author(s):  
Dinni Mahmudi ◽  
Muhammad Isa ◽  
Didik Sugiyanto
Keyword(s):  
Magnetic Field ◽  
Magnetic Anomalies ◽  
Magnetic Data ◽  
Geothermal Area ◽  
Reference Field ◽  
Subsurface Structure ◽  
International Geomagnetic Reference Field ◽  
Total Magnetic Field ◽  
International Geomagnetic Reference ◽  
Proton Precession Magnetometer

Telah dilakukan penelitian geofisika menggunakan metode magnetik untuk mendapatkan struktur bawah permukaan di daerah prospek panas bumi Jaboi, Sukajaya, Kota Sabang. Pengukuran medan magnetik total dilakukan pada 40 titik menggunakan Proton Precession Magnetometer (PPM). Daerah Jaboi memiliki sudut inkinasi -4.416 dan deklinasi -0.875 dengan nilai medan magnetik total berkisar antara 41550 hingga 42600 nT. Untuk mendapatkan nilai anomali magnetik dilakukan koreksi diurnal dan koreksi IGRF (International Geomagnetic Reference Field). Setelah koreksi dilakukan diperoleh nilai anomali magnetik daerah panas bumi Jaboi antara -200 nT sampai dengan -950 nT. Selanjutnya hasil anomali magnetik ini digunakan dalam memodelkan struktur bawah permukaan dengan panjang lintasan 1800 m dari Tenggara-Barat Laut. Berdasarkan interpretasi data anomali magnetik menunjukkan daerah penelitian didominasi oleh anomali rendah yang berarti daerah manifestasi panas bumi. Interpretasi anomali tinggi dan rendah menunjukkan adanya patahan yang diduga sebagai patahan Ceuneuhot. Dari hasil pemodelan 2D menggunakan software Mag2DC, menunjukkan bahwa terdapat 5 lapisan dengan kedalaman 0 - 1000 m. Lapisan-lapisan ini adalah soil ( = 0,00 x 10-6 SI), andesit terubah (  = 13,408 x 10-6 SI), breksi tufa terubah (  = 12,686 x 10-6 SI), andesit terubah (  = 13,423 x 10-6 SI) dan breksi andesit (  = 13,535 x 10-6 SI). Melalui pemodelan ini diyakini zona patahan adalah patahan Ceuneuhot. Geophysical reasearch by using magnetic method was done in order to obtain subsurface structure of geothermal prospect area Jaboi, Sukajaya, Sabang City. The measurement of total magnetic field was taken at 40 points using Proton Precession Magnetometer (PPM). Jaboi area has an inklination angle -4.416 and declination angle -0.875 which has total magnetic field range between 41550 to 42600 nT. Diurnal Correction and IGRF (International Geomagnetic Reference Field) correction was used to obtain magnetic anomalies. The values of magnetic anomalies in Jaboi Geothermal Area is -200 to -950 nT. The result of magnetic anomalies was used to modelled the subsurface structure with profile distance is about 1800 m from Southeast to Northwest. Based on the magnetic anomalies data, the reaserch area dominated by low anomalies that indicated geothermal manifestation area. High and low magnetic anomalies indicated a fault that estimated as Ceuneuhot fault. From the result of 2D modelling using software Mag2DC, showed that the research area consist of 5 subsurface structure from 0 – 1000 m depth. The layers are soil (  = 0.00 × 10-6 SI), altered andesite (  = 13.408 × 10-6 SI), altered breccia-tuff (  = 12.686 × 10-6 SI), altered andesite (  = 13.423 × 10-6 SI), and breccia-andesite (  = 13.535 × 10-6 SI). Also from the model was  obtained the Ceuneuhot fault zone.  Keywords: Magnetik, Anomali Magnetik, Struktur Bawah Permukaan, Panas Bumi

scholarly journals Interpretasi Bawah Permukaan Daerah Penambangan Batuan Andesit Awang Bangkal Kabupaten Banjar Kalimantan Selatan Menggunakan Metode Magnetik

2019 ◽  
Vol 16 (2) ◽  
pp. 117
Author(s):  
Ayi Nurhidayah ◽  
Sri Cahyo Wahyono ◽  
Simon Sadok Siregar
Keyword(s):  
Magnetic Field ◽  
Data Processing ◽  
Geophysical Methods ◽  
Mining Area ◽  
Magnetic Method ◽  
Contour Map ◽  
Total Magnetic Field ◽  
Qualitative And Quantitative ◽  
Qualitative Interpretation ◽  
The Earth

This research has been done in the mining area of andesite rock of Awang Bangkal village by using magnetic method. Magnetic method is one of the most common geophysical methods used for preliminary surveys on petroleum, earth, and mineral rock exploration. It is intended to determine the subsurface distribution in the area by performing qualitative and quantitative interpretations based on the magnetism value of the earth. The result of data processing using geosoft oasis montaj software shows that the total magnetic field anomaly is -807,3 to -361,7 nT. Qualitative interpretation is done by looking at the contour map of the anomaly, the result of upward continuation and the reduction to the poles. While the interpretation is done by making a modeling of the path that has been determined using mag2dc software. The model shows that the rocks that dominate the area are andesite rocks with their susceptibility value of 0.0992 to 0.2305 in SI units.

scholarly journals Contribution of geophysics for the characterization of ore deposits, case of the Bouarfa mine, Morocco.

2018 ◽  
Vol 149 ◽  
pp. 02076
Author(s):  
Bahi Anas ◽  
Akhssas Ahmed ◽  
Ouadif Latifa ◽  
Ahmed Ait Errouhi ◽  
Kawtar Ouatiki
Keyword(s):  
Magnetic Field ◽  
Geophysical Methods ◽  
Mining Area ◽  
Ore Deposits ◽  
Magnetic Method ◽  
Total Magnetic Field ◽  
Regional Effects ◽  
Reduction To The Pole ◽  
Anomalous Bodies

Geophysical methods are one of the best ways to determine the potential of a mining area. Indeed, for the prospection of metalliferous deposits, the magnetic method remains essential as it makes it possible to characterize the extent and the depth of the anomalous bodies present in the prospected zone, mainly due to their reaction with the values of the total magnetic field. Thus, for the manganese mining zone of Bouarfa and more exactly Hammraouet, the genesis of the deposit is such that the manganese is generally associated with ferruginous minerals and clearly affect the total magnetic field. That said, the raw results obtained must imperatively be subjected to corrections to only keep the effect of the anomalous bodies on the magnetic field. Hence, we must proceed with the correction of the daytime effect then we eliminate the regional effects to get the map of the residual anomaly and finally we perform a reduction to the pole that will allow us to have well individualized and unipolar anomalies and thus allowing us to locate precisely the potentially mineralized axes. The synthesis of the various maps obtained by spatial interpolation of the data recorded in situ and corrected allows us to locate areas of mining interest and to determine the different tectonic phenomena that took place in our study area. In time, these maps will serve us to guide the subsequent mechanical surveys to confirm the results obtained by geophysical methods.

HYMU 80

Alloy Digest ◽  
1971 ◽  
Vol 20 (10) ◽  
Keyword(s):  
Magnetic Field ◽  
Fracture Toughness ◽  
Corrosion Resistance ◽  
Heat Treating ◽  
Initial Permeability ◽  
Nickel Iron ◽  
Technology Corporation ◽  
Carpenter Technology Corporation ◽  
Low Magnetic Field ◽  
Maximum Permeability

Abstract Carpenter HYMU 80 is an unoriented 80% nickel-iron-molybdenum alloy which offers extremely high initial permeability and maximum permeability with minimum hysteresis loss at low magnetic field strengths. This datasheet provides information on composition, physical properties, hardness, elasticity, and tensile properties as well as fracture toughness. It also includes information on corrosion resistance as well as forming, heat treating, machining, and joining. Filing Code: Ni-5. Producer or source: Carpenter Technology Corporation. Originally published May 1953, revised October 1971.

scholarly journals Bioinformatics-based prediction of conformational epitopes for Enterovirus A71 and Coxsackievirus A16

2021 ◽  
Vol 11 (1) ◽  
Author(s):  
Liping Wang ◽  
Miao Zhu ◽  
Yulu Fang ◽  
Hao Rong ◽  
Liuying Gao ◽  
...  
Keyword(s):  
Foot And Mouth Disease ◽  
Distribution Patterns ◽  
Vital Role ◽  
Coxsackievirus A16 ◽  
Essential Information ◽  
Site Distribution ◽  
The North ◽  
Conformational Epitopes ◽  
Enterovirus A71 ◽  
Antigenic Evolution

AbstractEnterovirus A71 (EV-A71), Coxsackievirus A16 (CV-A16) and CV-A10 are the major causative agents of hand, foot and mouth disease (HFMD). The conformational epitopes play a vital role in monitoring the antigenic evolution, predicting dominant strains and preparing vaccines. In this study, we employed a Bioinformatics-based algorithm to predict the conformational epitopes of EV-A71 and CV-A16 and compared with that of CV-A10. Prediction results revealed that the distribution patterns of conformational epitopes of EV-A71 and CV-A16 were similar to that of CV-A10 and their epitopes likewise consisted of three sites: site 1 (on the “north rim” of the canyon around the fivefold vertex), site 2 (on the “puff”) and site 3 (one part was in the “knob” and the other was near the threefold vertex). The reported epitopes highly overlapped with our predicted epitopes indicating the predicted results were reliable. These data suggested that three-site distribution pattern may be the basic distribution role of epitopes on the enteroviruses capsids. Our prediction results of EV-A71 and CV-A16 can provide essential information for monitoring the antigenic evolution of enterovirus.

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