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Gotowa bibliografia na temat „Mineral magnetic”

Autor: Grafiati

Data publikacji: 6 września 2023

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Artykuły w czasopismach na temat "Mineral magnetic"

Mulyana, Mulyana, Vistarani Arini Tiwow i Sulistiawaty Sulistiawaty. "ANALISIS SUSEPTIBILITAS MAGNETIK TANAH TPA ANTANG MAKASSAR BERDASARKAN KEDALAMAN". ORBITA: Jurnal Kajian, Inovasi dan Aplikasi Pendidikan Fisika 8, nr 2 (10.11.2022): 234. http://dx.doi.org/10.31764/orbita.v8i2.11252.

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ABSTRAKAnalisis suseptibilitas magnetik pada tanah di TPA Antang Makassar berdasarkan kedalaman telah dilakukan. Studi ini bertujuan untuk menganalisis jenis mineral magnetik, domain magnetik, dan sumber mineral magnetik. Suseptibilitas magnetik diukur menggunakan alat Bartington MS2 Magnetic Susceptibility Meter dengan sensor MS2B yang bekerja pada dua frekuensi. Pengukuran suseptibilitas magnetik dilakukan dengan mengambil sampel pada lima titik dengan variasi kedalaman hingga 0-80 cm dari permukaan tanah. Hasil pengukuran menunjukkan bahwa nilai suseptibilitas magnetik di TPA Antang bervariasi 2,097 m3/kg hingga 33,523 m3/kg dan suseptibilitas magnetik bergantung frekuensi pada rentangan 2,51% hingga 6,51%. Sampel tanah diindikasikan mengandung mineral magnetik yang bersifat antiferomagnetik dan paramagnetik. Domain magnetik pada sampel tanah adalah superparamagnetik (SP) dan stable single domain (SSD). Sumber mineral magnetik dominan berasal dari aktivitas manusia (antropogenik). Kata kunci: TPA; tanah; suseptibilitas magnetik; mineral magnetik; antropogenik. ABSTRACTMagnetic susceptibility analysis of soil at TPA Antang Makassar based on depth has been carried out. This study aims to analyze the types of magnetic minerals, magnetic domains, and sources of magnetic minerals. Magnetic susceptibility was measured using a Bartington MS2 Magnetic Susceptibility Meter with an MS2B sensor that works on two frequencies. Magnetic susceptibility measurements were carried out by taking samples at five points with depth variations up to 0-80 cm from the ground surface. Measurement results show that the magnetic susceptibility values in Antang landfill varied from 2.097 m3/kg to 33.523 m3/kg and the magnetic susceptibility was frequency dependent in the range of 2.51% to 6.51%. Soil samples are indicated to contain magnetic minerals that are antiferromagnetic and paramagnetic. The magnetic domains in the soil samples are superparamagnetic (SP) and stable single domain (SSD). The dominant source of magnetic minerals comes from human activities (anthropogenic). Keywords: landfill; soil; magnetic susceptibility; magnetic mineral; anthropogenic.

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Arifya, Eldiani, i Afdal Afdal. "Pemetaan Zona Potensi Emas Menggunakan Metode Geomagnet di Jorong Lubuak Sariak, Nagari Kajai, Pasaman Barat". Jurnal Fisika Unand 9, nr 4 (25.01.2021): 524–30. http://dx.doi.org/10.25077/jfu.9.4.524-530.2020.

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Penelitian untuk menentukan zona sebaran emas di Jorong Lubuak Sariak, Nagari Kajai, Kabupaten Pasaman Barat, Sumatra Barat telah dilakukan. Penelitian ini menggunakan metode magnetik pada daerah seluas 700 m2 dengan 70 titik. Hasil penelitian menunjukan emas berasosiasi dengan pirhotit dengan nilai suseptibilitas 0,00046-1,4 SI, pirit dengan suseptibilitas 0,000035-0,005 SI dan siderit dengan suseptibilitas magnetik 0,0013 – 0,011 SI yang merupakan mineral sulfida magnetik yang terdapat dalam batuan metamorf dan sedimen. Selain itu mineral emas juga beasosiasi dengan batuan beku intrusi yaitu porfiri dengan nilai suseptibilitasnya 0,00025-0,21 SI. Di lokasi penelitian diduga emas berasosiasi dengan mineral pembawa emas terletak pada kedalaman 0 m sampai dengan 84 meter di bawah permukaan. The reasearch about mapping of gold potential zones in Jorong Lubuak Sariak, Nagari Kajai, Pasaman Barat has been conducted. This reasearch used magnetic method in area 700 m2 with 70 points. Results show that golds are associated with pyrrhotites with magnetic susceptibility value 0.00046 – 1.4 SI, pyrite with magnetic susceptibility value of 0.000035 – 0.005 SI, siderite with magnetic susceptibility of 0.0013 – 0.011 SI which is a magnetic sulfide mineral found inmetamorphic and sedimentary rocks. Gold minerals are also associated with igneous rock (intrusion) that is porphyry with magnetic susceptibility value of 0.00025 – 0.21 SI. Gold carrier minerals located at 0 – 84 m depth

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Boroallo, Anastacya, Vistarani Arini Tiwow i Sulistiawaty Sulistiawaty. "STUDI MINERAL MAGNETIK TANAH TPA ANTANG MAKASSAR BERDASARKAN DATA SUSEPTIBILITAS MAGNETIK". ORBITA: Jurnal Kajian, Inovasi dan Aplikasi Pendidikan Fisika 9, nr 1 (6.05.2023): 16. http://dx.doi.org/10.31764/orbita.v9i1.11663.

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ABSTRAKTelah dilakukan penelitian untuk mengetahui nilai suseptibilitas magnetik pada tanah di TPA Antang Makassar berdasarkan sebaran. Suseptibilitas magnetik diukur menggunakanbartington MS2 Magnetic susceptibility meter dengan sensor MS2B yang bekerja pada dua frekuensi. Pengukuran suseptibilitas magnetik dilakukan dengan mengambil sampel pada 30 titik dengan jarak yang tidak ditentukan atau secara random. Hasil penelitian menunjukkan bahwa nilai suseptibilitas magnetik di TPA Antang Makassar bervariasi dengan rentang 1,442 m3/kg hingga 33,523 m3/kg dan suseptibilitas magnetik bergantung frekuensi berada pada rentangan 2,32% hingga 6,51% rentangan nilai suseptibilitas magnetik tersebut mengindikasikan sampel mengandung mineral magnetik yang bersifat antiferomagnetik dan paramagnetik. Dimana domain magnetik pada sampel tanah TPA yaitu superparamagnetik (SP) dan stable single domain (SSD). Kata kunci: tanah; suseptibilitas magnetik; mineral magnetik;TPA. ABSTRACTResearch has been carried out to determine the value of magnetic susceptibility on soil at TPA Antang Makassar based on distribution. Magnetic susceptibility was measured using a bartington MS2 Magnetic susceptibility meter with an MS2B sensor that works on two frequencies. Magnetic susceptibility measurements were carried out by taking samples at 30 points with an undetermined distance or randomly. The results showed that the magnetic susceptibility values in Antang TPA Makassar varied with the range of 1.442m3/kg to 33.523 m3/kg and the frequency-dependent magnetic susceptibility was in the range of 2.32% to 6.51%. The range of magnetic susceptibility values indicated that the sample contained magnetic minerals. which are antiferromagnetic and paramagnetic.The magnetic domains in the soil samples are superparamagnetic (SP) and stable single domain (SSD). Keywords: soil; magnetic susceptibility; magnetic minerals; landfill

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Didik, Lalu A., Isniwana Damayanti, Jumliati Jumliati i Putri Dinda Alfadia Lestari. "Morphological Characteristics and Mineral Content Analysis of Magnetic Minerals Based on River and Coastal Sand using SEM-EDX". Jurnal Sains Dasar 10, nr 2 (1.11.2021): 44–50. http://dx.doi.org/10.21831/jsd.v10i2.42217.

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This study aims to analyze the mineral content and morphological characteristics of magnetic minerals based on coastal and river sand. Analysis of minerals content uses Atomic Absorption Spectroscopy (AAS) to determine the content of Fe and Energy Dispersive X-Ray (EDX) to determine the elements of magnetic minerals based on coastal and river sand. While the morphological characteristics were analyzed using Scanning Electron Microscope (SEM). Based on the AAS analysis, magnetic mineral based on coastal sand has higher Fe content (9.03 mg/gram) compared to magnetic mineral based on river sand (8.03 mg/gram). This is also confirmed by EDX analysis where the Fe content of magnetic mineral based on coastal sand is 2.07 ± 0.21%. This value is greater than the Fe content of magnetic mineral based on river sand which cannot be measured by EDX. Morphological analysis using SEM shows that magnetic mineral based on coastal sand has a relatively uniform particle size compared to magnetic mineral based on river sand. The particle size of magnetic minerals based on coastal sand also smaller than magnetic minerals based on river sand. Coastal sand also has finer size compared to river sand. This is because coastal sand sediments are formed due to the energy of sea waves so that they have a smoother structure. While river sand sediments come from limestone deposits that have a fine and coarse structure.

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Ponomarenko, O. "Method for Transformation of Weak Magnetic Minerals (Hematite, Goethite) into Strong Magnetic Mineral (Magnetite) to Improve the Efficiency of Technologies for Oxidized Iron Ore Beneficiation". Science and innovation 11, nr 2 (30.03.2015): 31–34. http://dx.doi.org/10.15407/scine11.02.031.

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Tamuntuan, Gerald, Seni H. J. Tongkukut i Guntur Pasau. "Analisis Suseptibilitas Dan Histeresis Magnetik Pada Endapan Pasir Besi Di Sulawesi Utara". Jurnal MIPA 6, nr 2 (22.11.2017): 105. http://dx.doi.org/10.35799/jm.6.2.2017.18008.

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Telah dilakukan pengukuran suseptibilitas dan hysteresis magnetic untuk mengetahui karakteristik magnetic endapan pasir besi pada beberapa lokasi di Sulawesi Utara. Lokasi pengambilan sampel dalam penelitian ini adalah tiga lokasi di pesisir timur semenanjung utara Pulau Sulawesi yaitu daerah Belang, Hais, dan Minanga, serta tiga lokasi di wilayah pesisir barat yaitu daerah Lalow, Inobonto, dan Lolan. Hasil yang diperoleh menunjukkan bahwa nilai suseptibilitas magnetic pada sampel-sampel pasir yang diukur bervariasi dari 7,73 × 10-8 m3kg-1 hingga 436,38 × 10-8 m3kg-1. Pengukuran suseptibilitas magnetik pada empat distribusi ukuran bulir pasir yang berbeda menunjukkan bahwa nilai rata-rata tertinggi suseptibiltas adalah pada pasir berukuran halus (fine grains). Secara umum, pasir besi pada daerah pantai timur semenanjung utara Pulau Sulawesi memiliki nilai suseptibilitas magnetik yang lebih tinggi dibandingkan dengan daerah pantai barat. Konsentrasi mineral superparamagnetik tertinggi berada pada daerah Belang. Mineral magnetik yang dominan dari sampel-sampel pasir besi yang diteliti adalah magnetit dengan domain statepseudo-single domain.Magnetic susceptibility and hysteresis parameters of iron sand deposits at several locations in North Sulawesi have been measuredin order to determine their magnetic characteristics. Samples were taken from six locations which is three locations on the east coast of the northern arm of Sulawesi Island (Belang, Hais and Minanga) and three othersfrom the western coastal areas (Lalow, Inobonto and Lolan).The result shows that magnetic susceptibility of the sand samples vary from 7,73 × 10-8 m3kg-1to 436,38 × 10-8 m3kg-1.Measurement of magnetic susceptibility in four different grain size distributions shows that fine grainsand have the highest susceptibility value.In general, magnetic susceptibility valueof Iron sand samplesfrom the east coast of the northarm of Sulawesi Island was higher than the west coast. Concentration of superparamagnetic mineral from Belang area was higher than other locations. The predominant magnetic minerals of the iron sand samples are magnetite with the domain state pseudo-single domain.

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Khuzaima, Nur, Khairel Rafezi, Nur Hidayah Ahmad Zaidi, M. K. R. Hashim i Sheikh Abdul Rezan. "Minerals Characterization of Magnetic and Non-Magnetic Element from Black Sand Langkawi". Solid State Phenomena 280 (sierpień 2018): 440–47. http://dx.doi.org/10.4028/www.scientific.net/ssp.280.440.

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Valuable minerals are defined as mineral which having good opportunities to economic and consireable important. The most commonly occurring sand mineral deposits are ilmenite, rutile, magnetite, cassiterite, monazite, tourmaline, zircon, kyanite, silimanite, and garnet. In Malaysia, mineral sand deposits is found in Langkawi which known as black sand Langkawi. Langkawi black sand having high amount of valuable minerals that is very crucial in the industrial and construction products. Characterizations of black sand acquire different techniques to concentrate and separate valuable minerals. These techniques utilize different in physical or chemical properties of the valuable and gangue (wastes) minerals. For magnetic is based on natural or induced differences in magnetic susceptibility or conductivity of the minerals.. They are used to distinguish and extract magnetic, slightly magnetic and non-magnetic components present in the heavy fraction (Rutile, Ilmenite, Magnetite, Garnets, Zircon and Monazite). All minerals will have one of three magnetic properties: ferromagnetic, paramagnetic and diamagnetic. Ferromagnetic minerals (i.e. Magnetite and Ilmenite) are magnetic and easily attracted to the poles of magnet. Paramagnetic and diamagnetic minerals in the group magnetic, but if the mixture of paramagnetic and diamagnetic minerals are passed through a magnetic field, the paramagnetic minerals will be pulled into the field and diamagnetic minerals separated from the field. By varying the intensity of the magnetic field, it is also possible to separate different paramagnetic minerals from each other. In this study, techniques used to separate valuable minerals from black sand are magnetic separator.

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Tanauma, Adey, i Ferdy Ferdy. "POTENSI SUMBERDAYA ALAM PASIR BESIPANTAI ARAKAN KABUPATEN MINAHASA SELATAN". JURNAL ILMIAH SAINS 15, nr 1 (31.10.2011): 225. http://dx.doi.org/10.35799/jis.11.2.2011.211.

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POTENSI SUMBERDAYA ALAM PASIR BESIPANTAI ARAKAN KABUPATEN MINAHASA SELATAN Adey Tanauma1) dan Ferdy1) 1)Program Studi Fisika FMIPA Universitas Sam Ratulangi, Manado 95115 ABSTRAK Pasir besi merupakan salah satu sumberdaya alam di Sulawesi Utara yang belum dimanfaatkan secara optimal. Salah satu lokasi yang cukup potensial untuk mendapatkan endapan pasir besi ini adalah pesisir pantai Arakan. Penelitian ini bertujuan untuk menentukan sifat-sifat magnetik endapan pasir besi yang terdapat di pesisir Pantai Arakan kabupaten Minahasa Selatan Provinsi Sulawesi Utara. Suseptibilitas magnetik dan magnetisasi saturasi sampel pasir besi Arakan mengindikasikan bahwa kandungan mineral magnetik yang dominan adalah magnetite. Ukuran bulir dari mineral magnetik terutama magnetite didominasi oleh bulir-bulir magnetik berukuran besar atau bulir magnetik dengan domain magnetik antara pseudosingle domain dan multi domain. Tingginya kandungan mineral magnetik berdasarkan nilai karakterisasinya, terutama nilai suseptibilitas magnetik memberikan peluang untuk pemanfaatan lebih lanjut dari sumberdaya alam ini. Kata kunci: histeresis magnetik, pasir besi, suseptibilitas THE POTENTIAL OF NATURAL RESOURCES OF IRON SAND IN ARAKAN COASTAL SUBPROVINCE OF SOUTH MINAHASA ABSTRACT Iron sand represent one of the natural resources in North Sulawesi which not yet been exploited in optimally. One of the location which quite potential to get this iron sand sediment is coastal area of Arakan. This research aim to determine the nature of magnetic of iron sand sediment which there are in coastal area of Arakan, Sub-province of South Minahasa, Province of North Sulawesi. Magnetic suseptibility and saturation magnetization of iron sand sampel of Arakan indicated that dominant magnetic mineral is magnetite. Seed size measure of magnetic mineral especially magnetite predominated by big sized magnetic seeds or magnetic seed with magnetic domain between domain pseudosingle and multi domain. The height content of magnetic mineral based on characteristic value, especially magnetic suseptibility give the opportunity for furthermore exploiting of this natural resources. Keywords : magnetic hysteresis, iron sand, suseptibility

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Prasetyo, Ihsan Junira, Hamdi Rifai, Syafriani Syafriani i Rizaldi Putra. "Morphological Characteristics and Elemental Composition of Magnetic Minerals from the Volcanic Activity of Lake Maninjau Sediments". Trends in Sciences 19, nr 8 (27.03.2022): 3428. http://dx.doi.org/10.48048/tis.2022.3428.

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Lake Maninjau has formed by the eruption of the Maninjau volcano, which spewed volcanic material to various places. This volcanic material contains various mineral-forming elements, one of which are magnetic minerals that accumulate in lake sediments. This research aims to determine the morphological characteristics and composition of magnetic mineral elements from volcanic activity in the sediments of Lake Maninjau, Agam Regency, Indonesia. Characteristics of morphological and composition of magnetic mineral elements originating from volcanic activity can describe volcanic eruptions in the past. So, this research is very important for paleo-eruption studies because it can be used as supporting information to determine the distribution of volcanic ash from a volcanic eruption in the past based on the magnetic properties of the material. The sample was selected from the core MAN 18-41B site 12 with a depth of 35 - 36 cm because it has a high magnetic susceptibility value. Morphological images of lake sediment magnetic minerals were viewed using a SEM instrument and EDS detector that shows the composition of the elements that arrange magnetic minerals. In general, the analysis of morphological images shows that the magnetic mineral grains in the Maninjau lake sediments are irregular and porous. This indicates that the magnetic minerals originate from volcanic activity. The image produced by Back Scattered Electron (BSE) has a difference in brightness on the surface of the magnetic grains, which indicates that the bright surface contains high Fe elements and the dark surface contains high Si. The spectrum generated by EDS shows that the dominant elements present in magnetic minerals in lake sediments are Fe, Ti and Si. Based on the morphology and elemental composition, it is indicated that the minerals contained in the sediments of Lake Maninjau come from volcanic activity. HIGHLIGHTS Lake Maninjau has formed by the eruption of the Maninjau volcano, which spewed volcanic material to various places. This volcanic material contains various mineral-forming elements, one of which are magnetic minerals that accumulate in lake sediments Characteristics of morphological and composition of magnetic mineral elements originating from volcanic activity can describe volcanic eruptions in the past Morphological forms can provide information about the source of magnetic minerals derived because magnetic minerals have different properties, types, and morphology depending on the source Maninjau Lake sediments are dominated by Iron (Fe), Silica (Si), and Titanium (Ti). Based on the morphological images and elemental composition, the magnetic minerals present in the Maninjau lake sediments are indicated to come from volcanic activity GRAPHICAL ABSTRACT

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Basuki, Rajab, Nanang Dwi Ardi i Mimin Iryanti. "Analisis Sebaran Mineral Logam Pada Sedimentasi Batuan Di Daerah Kertajadi, Cidaun, Kabupaten Cianjur, Jawa Barat Menggunakan Metoda Geomagnet". Wahana Fisika 2, nr 1 (20.06.2017): 37. http://dx.doi.org/10.17509/wafi.v2i1.7019.

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Cidaun merupakan salah satu daerah pesisir pantai selatan yang terletak pada Kabupaten Cinajur Provinsi Jawa Barat. Salah satu kelebihan dari daerah pesisir pantai selatan Pulau Jawa adalah terdapat banyaknya mineral logam penghasil besi yang tersebar luas di sepanjang pesisir pantai. Oleh karena itu dilakukanlah eksplorasi untuk memetakan sebaran mineral logam yang ada di daerah Cidaun. Dalam melakukan eksplorasi mineral logam dibutuhkan suatu metode yang paling efektif yaitu eksplorasi geofisika dengan menggunakan metode geomagnet. Proses pengolahan data pada metode geomagnet dilakukan dengan menghitung nilai anomali magnetik dari medan magnetik total yang telah dilakukan koreksi terhadap koreksi harian dan koreksi IGRF. Kemudian dengan metode inversi data yang telah didapat dijadikan sebuah model. Selain itu dilakukan juga interpretasi kualitatif dan interpretasi kuantitatif. Interperetasi kualitatif dilakukan pada data yang telah dimodelkan menggunakan software surfer 11, apabila data tersebut terdapat anomali magnetik bernilai sangat tinggi yang berdekatan dengan nilai anomali magnetik bernilai rendah atau perubahan nilai anomali terjadi secara signifikan kemudian dilakukan proses interpretasi secara kuantitatif. Interpretasi kuantitatif pada penelitian ini dengan dilakukan deliniasi berupa proses sayatan pada perbedaan nilai anomali magnetik yang terjadi perubahan secara signifikan. Tahap selanjutnya data dari proses sayatan tersebut kemudian dilakukanlah pemodelan menggunakan software mag2dc untuk mengetahui sebaran mineral logam dapa daerah tersebut. Berdasarkan data yang telah diolah pada daerah Kertajadi, Cidaun, Kabupaten Cianjur, Jawa Barat dengan koordinat 698283 easting - 757162 easting dan 9180169 northing - 9171050 northing memiliki rentang nilai anomali magnetik -5 nT – 145 nT. Sedangkan nilai anomali magnetik pada daerah yang telah dilakukan proses sayatan memiliki rentang nilai 84.18 nT - 119.69 nT dengan nilai susptibilitas -0.041000 – 0.050001. Dari rentang nilai suseptibilitas tersebut diduga sebaran mineral yang yang memiliki nilai suseptibilitas positif merupakan bijih besi sedangkan yang bernilai negatif merupakan lempung dan endapan pasir. Dari hasil dari penelitian ini diharapkan data tersebut dapat dijadikan informasi dan referensi bagi masyarakat, peneliti lain dan pengusaha tambang dalam eksplorasi mineral logam.Cidaun is one of the coastal areas of the southern coast located in the district of West Java province Cinajur. One of the advantages of the southern coastal areas of Java is that there are many ferrous metal mineral producer widespread along the coast. Therefore, the exploration was undertaken to map the distribution of metallic minerals in the area Cidaun. In conducting metal mineral exploration required a most effective method is a geophysical exploration using geomagnetic methods. Data processing on geomagnetic method is done by calculating the value of the magnetic anomalies of the total magnetic field has a daily correction of correction and correction IGRF. Then, with the inversion method of data has been obtained serve as a model. The researcher also interpretation of qualitative and quantitative interpretation. Qualitative Interperetasi performed on the data that has been modeled using software surfer 11, when the inputs are very high-value magnetic anomalies adjacent to the value of the magnetic anomalies of low value or change in value of the anomaly occurred significantly later performed quantitative interpretation process. Quantitative interpretation in this study conducted a process of delineation of the incision on the difference in magnetic anomaly change significantly. The next stage of the data are then perform the incision process modeling using software mag2dc to determine the distribution of metallic minerals onshore areas. Based on the data that has been processed in the region Kertajadi, Cidaun, Cianjur, West Java coordinate 698283 easting - 757162 easting and 9180169 northing - 917105 northing and has a value range of magnetic anomaly -5 nT - 145 nT. While the value of magnetic anomalies in the area that has been carried out the process of incisions have a range of values 84.18 nT - 119.69 nT with susptibilitas value -0.041000 - 0.050001. Of the value range susceptibility is suspected distribution of minerals that have a positive susceptibility value is the iron ore which is negative while the clay and sand deposits. From the results of this study are expected data can be made of information and reference for the community, other researchers and mining company in mineral exploration.

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Rozprawy doktorskie na temat "Mineral magnetic"

Yanmin, Wang. "Wet magnetic concentration for weakly magnetic mineral fines and ultrafines". Doctoral thesis, Luleå, 1993. http://urn.kb.se/resolve?urn=urn:nbn:se:ltu:diva-26710.

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The first objective of the thesis was to reveal the characteristic magnetic behaviour of natural weakly magnetic minerals (such as hematite and chromite), and the size limits of the particles recoverable by the existing modem high intensity and high gradient magnetic separators. The second objective was to enhance the particle aggregation andlor the magnetic response for wet magnetic concentration of the ultrafines which escaped from the separators. It was observed that weakly magnetic natural minerals (hematite and chromite) exhibited variations in the magnetic behaviour with respect to magnetizing field, temperature and even particle size, It was indicated that high gradient magnetic separation with industrial matrices was efficient for weakly magnetic minerals as small as 10 um, but below this size, poor separation efficiency was obtained. In this thesis, modifications to the existing magnetic technology or alternative methods were investigated for the efficient recovery of particles below 10 gm. The technology or methods included "carrier" or "piggy-back" method, aggregation with magnetic bonding (with permanent or fieldinduced magnetic moment), and hydrophobic magnetite seeding. The thesis discusses the theoretical aspects of the problem and the experimental work. It was clearly demonstrated that wet magnetic concentration was more efficient for the ultrafine fractions whereas other methods could be used to increase the effective particle size dimensions andlor the magnetic susceptibilities.
Godkänd; 1993; 20070426 (ysko)

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Schmidt, Volkmar. "Magnetic and mineral fabrics in carbonate rocks /". Zürich : ETH, 2007. http://e-collection.ethbib.ethz.ch/show?type=diss&nr=17090.

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Smith, J. P. "Mineral magnetic studies on two Shropshire-Cheshire meres". Thesis, University of Liverpool, 1985. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.372707.

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Watson, D. J. "Mineral magnetic and palaeomagnetic properties of continental shelf sediments". Thesis, University of Edinburgh, 1989. http://hdl.handle.net/1842/14648.

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Yang, Ying Ping. "Electromagnetic characteristics of synthetic rocks, and sulphide and oxide mineral assemblages". Thesis, The University of Sydney, 1995. https://hdl.handle.net/2123/26849.

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An understanding of the electromagnetic characteristics of sulphide-bearing and magnetite-bearing rock and ore samples is important in the interpretation of electromagnetic (EM) exploration data. In this research study of electromagnetic conductivity characteristics, a theoretical measurement basis was developed, synthetic analogue materials were studied and the theory and analogue results were related to rock samples of varied mineralogy, texture and mineral concentration. The theory developed for cylindrical core sample EM measurements agreed with experiments performed on standard conductive samples using a multi-frequency coilbridge system in the 10 kHz to 4 MHz range. Skin effect was an important limitation to EM measurements on conductive (o > 1000 S/m) core samples but can be effectively monitored by spectral measurements. Measurements on 104 synthetic cores, of five types, revealed the relationship between apparent EM conductivity and the structure and arrangement of the conducting materials. These analogue cores contained a range of conductors, including copper wires, graphite powder, aluminium particles and magnetite/ilmenite grains, set in a matrix of insulating plaster or wax, representing models of layered, stringer, disseminated, network, massive and magnetite-rich mineralisation. A mechanism attributed to magnetic loss produced unrealistically high EM apparent conductivities for magnetite—bearing samples, especially at low frequencies (f < 100 kHz). For a conductive magnetite sample (6 > 1 S/m), the effect of magnetic loss can be eliminated at high frequencies (f > 400 kHz) and the ohmic conductivity of the magnetite sample can then be estimated. A total of 254 sulphide—bearing and magnetite-rich samples from 15 different geological environments constituted the natural materials used in this research. The sulphides, including chalcopyrite, pyrite, galena, sphalerite and pyrrhotite, and magnetite occurred in varying proportions and diverse fabrics in these samples. Complementary measurements of galvanic conductivity, density and magnetic susceptibility and thin section mineralogy results provided essential auxiliary information for the analysis of the EM data. The electrical conductivity of a rock is controlled by its mineralogy, mineral habit, mode of connectivity of conducting minerals and rock fabric. Texture may have an overwhelming effect on the EM and galvanic conductivities of rock samples. The conductivities of the massive sulphides studied ranged from thousands of S/m to a few tens of thousands of S/m for pyrrhotite, hundreds of S/m to thousands of S/m for chalcopyrite and galena, and a few S/m to hundreds of S/m for pyrite. Sulphide-free magnetite-bearing rocks generally are, at best, only moderate conductors (l S/m to 10 S/m) and then only with a large proportion of magnetite. Coarse grainsize in massive magnetite significantly enhances conductivity (up to hundreds of S/m). There is a clear contrast in the conductivity behaviour of networks and discrete aggregations of conducting minerals. When pyrrhotite is present, it usually dominates the conductivity response. Chalcopyrite also makes an effective contribution, whereas pyrite and magnetite often do not. Conductivity modelling of concentration variations can be achieved using appropriate empirical relations for different cases. For dispersed conducting euhedral cubic minerals such as pyrite or magnetite, Maxwell's mixing law can be applied. When a conducting material, such as pyrite or magnetite, changes from a dispersed phase to conductive channels with increasing concentration, percolation theory can be applied The observed critical concentrations, where the conducting minerals start to change from dispersed phases to continuous phases electrically, are 20 percent to 50 percent for pyrite, 40 percent to 80 percent for magnetite. For pyrrhotite or Chalcopyrite, present as continuous conducting minerals, it appears that a power law can be applied and the power exponent may vary between 1.5 and 5.5, depending on the conducting network structure. For a laboratory core sample with dispersed conducting particles, the calculated and observed diminution of measured EM conductivity with an increase in diameter of the sample suggests that EM exploration methods may not work well in conductivity prospecting for a disseminated target. For a heterogeneous mineralised rock sample, applications of laboratory—determined EM conductivity to field situations generally need to take account of the structure or texture of the conducting minerals. The research results of this thesis are intended as a contribution to the understanding of laboratory electromagnetic conductivity measurements. The results have important applications to the designs and evaluations of field-based EM systems in the exploration for metallic lustre sulphide and oxide economic mineral deposits in a variety of geological settings.

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Sandström, Dan. "Solid state nuclear magnetic resonance studies of synthetic mineral surfaces". Doctoral thesis, Luleå tekniska universitet, Industriell miljö- och processteknik, 2006. http://urn.kb.se/resolve?urn=urn:nbn:se:ltu:diva-26480.

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Solid state 1H, 31P and 27Al Magic Angle Spinning (MAS) Nuclear Magnetic Resonance (NMR) was used in studies of surface species formed on a synthetic fluorapatite in aqueous suspensions at different pH with or without ions or ion complexes of iron or aluminium in the suspension. Different sites related to the PO43- ions at the mineral surface were suggested, POx, POxH and POxH2. Also, three sites formed of Ca2+, H+ and OH- ions at the fluorapatite surface CaOH2+, CaOH and Ca(OH) 2- were suggested. Both single-pulse and cross polarization MAS NMR experiments were used to measure the 1H, 31P and 27Al isotropic chemical shifts. In the 1H to 31P cross polarization experiments the contact time was varied in order to differentiate the resonance liners corresponding to different surface sites from the resonance lines assigned to the PO43- ions in the crystal structure of fluorapatite. In the solid state dipole-dipole recoupling MAS NMR experiments the sequence XY8-DRAMA was used in studies of distances between O,O'- dialkyldithiophosphates adsorbed on synthetic galena (PbS). The sequence was tested experimentally and gave highest double-quantum excitation efficiency of the tested dipole-dipole recoupling sequences tested at the spinning frequency 4.2 kHz. A new sequence IRS-DRAMA was derived analytically and showed high double quantum excitation efficiency in a broad interval of the 31P resonance frequencies at the spinning frequency 2.1 kHz.
Godkänd; 2006; 20061205 (haneit)

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Sandström, Dan. "Solid state nuclear magnetic resonance studies of synthetic mineral surfaces /". Luleå : Luleå tekniska universitet/Tillämpad kemi och geovetenskap/Kemi, 2006. http://epubl.ltu.se/1402-1544/2006/26/LTU-DT-0626-SE.pdf.

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Hannam, Jacqueline Ann. "Processes and timescales of secondary magnetic mineral formation in topsoils". Thesis, University of Liverpool, 1999. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.366393.

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Yu, L. "Environmental applications of mineral magnetic measurement : Towards a quantitative approach". Thesis, University of Liverpool, 1989. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.234577.

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Jirestig, Jan A. "High intensity and high gradient magnetic separation in mineral processing". Doctoral thesis, Luleå tekniska universitet, 1994. http://urn.kb.se/resolve?urn=urn:nbn:se:ltu:diva-25815.

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Natural minerals often lack well defined magnetic susceptibilities. Instead they must be thought of as occurring in a susceptibility range where the bulk susceptibility is affected by present impurities. Inclusions or foreign atoms in solid solution may alter a materials magnetic properties to a large extent. Mixed particles of dia andlor paramagnetic materials display a linear relationship while ferromagnetic inclusions involve a demagnetisation factor. The susceptibility distribution of value minerals in relation to gangue in the ore is the most important factor governing magnetic separation performance. Until recently, high gradient and high intensity separators of matrix type were exclusively used in wet processing. Now, new dry separators are extending the particle range for dry, fine particle separation. The capture characteristics of the matrix has been shown to change with the magnetic field strength. The separation cut is more precise at high fields, at low fields the capture probability graph cants. By superimposing the capture function on the susceptibility distribution of an ore, it is shown that materials containing value minerals at either high or low susceptibility is ideal for HGMS separation. Complex ores carrying value and gangue minerals distributed over a wide susceptibility range are unfavourable. The former situation is common in industrial mineral processing and in the upgrading of flotation concentrates. The latter susceptibility distribution is very common in complex sulphide ore feeds.
Godkänd; 1994; 20070429 (ysko)

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Książki na temat "Mineral magnetic"

G, Andritzky, Geological Survey (Namibia) i Support to the Geological Survey/Mineral Prospecting Promotion (PN 90.2214.6) (Project : Namibia), red. Integrated investigation of magnetic patterns in the Sinclair-Helmeringhausen area. Windhoek: Bundesanstalt für Geowissenschaften und Rohstoffe, 1996.

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G, Andritzky, Geological Survey (Namibia) i Support to the Geological Survey/Mineral Prospecting Promotion (PN 90.2214.6) (Project : Namibia), red. Integrated investigation of magnetic patterns in and around the Rosh Pinah area. Windhoek: Bundesanstalt für Geowissenschaften und Rohstoffe, 1996.

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Te tai kuang wu fa ji qi zai shi you kan tan zhong de ying yong: Method of peculiar state mineral and its application on petroleum exploration = Tetaikuangwu fa jiqi zai shiyou kantanzhong de yingyong. Beijing: Di zhi chu ban she, 2011.

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Booth, Colin Anthony. Sediment - source - linkages in the Gwendraeth Estuary, South Wales, based on mineral magnetic analyses. Wolverhampton: University of Wolverhampton, 2002.

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P, Frost Thomas, i Geological Survey (U.S.), red. Analytical results of non-magnetic heavy-mineral-concentrate sample data from the Bethel and southern part of the Russian Mission 1p0s x 3p0s quadrangles, southwest Alaska. [Menlo Park, Calif]: U.S. Dept. of the Interior, U.S. Geological Survey, 1993.

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Jones, Keith Richard. Circulation, deposition and post-depositional changes of sediment in two Welsh estuaries: A mineral magnetic investigation. Wolverhampton: University of Wolverhampton, 2001.

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Ford, Arthur B. Magnetic susceptibility and density determinations for plutonic and metamorphic rocks of the Glacier Peak Wilderness and vicinity, northern Cascades, Washington. [Denver, Colo.?]: Dept. of the Interior, U.S. Geological Survey, 1988.

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McMacken, David. The Saratoga of the West: The story of the Magnetic Mineral Spring and Park Hotel of St. Louis, Michigan. St. Louis, Mich: D. McMacken, 1986.

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Cikcik, Ali. Magnetic flocculation of weakly magnetic minerals. Birmingham: University of Birmingham, 1985.

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W, Day Gordon, i Geological Survey (U.S.), red. Analytical results and sample locality map of nonmagnetic and moderately magnetic heavy-mineral concentrates from stream sediments from the Glens Falls 1⁰. [Reston, Va.?]: U.S. Dept. of the Interior, Geological Survey, 1986.

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Części książek na temat "Mineral magnetic"

Chelgani, Saeed Chehreh, i Ali Asimi Neisiani. "Magnetic Separation". W Dry Mineral Processing, 29–57. Cham: Springer International Publishing, 2022. http://dx.doi.org/10.1007/978-3-030-93750-8_2.

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Adeleke, Abraham Adewale. "Magnetic Separation". W Mineral Processing Technology, 181–96. Boca Raton: CRC Press, 2023. http://dx.doi.org/10.1201/9781003323433-14.

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Cohen, H. E. "Magnetic Separation". W Mineral Processing at a Crossroads, 287–315. Dordrecht: Springer Netherlands, 1986. http://dx.doi.org/10.1007/978-94-009-4476-3_10.

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Parker, M. R. "Processing of Mineral Ores by Modern Magnetic Separation Techniques". W Mineral Processing Design, 138–65. Dordrecht: Springer Netherlands, 1987. http://dx.doi.org/10.1007/978-94-009-3549-5_6.

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Thompson, Roy, i Frank Oldfield. "Mineral magnetic studies of lake sediments". W Environmental Magnetism, 101–23. Dordrecht: Springer Netherlands, 1986. http://dx.doi.org/10.1007/978-94-011-8036-8_10.

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Makarchuk, Oksana, Tetiana Dontsova i Anatolii Perekos. "Magnetic Nanocomposite Sorbents on Mineral Base". W Springer Proceedings in Physics, 705–19. Cham: Springer International Publishing, 2017. http://dx.doi.org/10.1007/978-3-319-56422-7_54.

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Haas, T., Ph Jehenson, D. Hillion, S. Tran Dinh, E. de Viel, J. Verrier i A. Syrota. "Phosphate Transfer and 31P Nuclear Magnetic Resonance (NMR) Spectroscopy Pre and Post Hemofiltration (HF)". W Phosphate and Mineral Homeostasis, 479–84. Boston, MA: Springer US, 1986. http://dx.doi.org/10.1007/978-1-4684-5206-8_59.

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Majumdar, Sharmila. "Magnetic Resonance Imaging of Bone". W Primer on the Metabolic Bone Diseases and Disorders of Mineral Metabolism, 277–82. Ames, USA: John Wiley & Sons, Inc., 2013. http://dx.doi.org/10.1002/9781118453926.ch32.

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McWhinnie, William R. "Electron Spin Resonance and Nuclear Magnetic Resonance Applied to Minerals". W Chemical Bonding and Spectroscopy in Mineral Chemistry, 209–49. Dordrecht: Springer Netherlands, 1985. http://dx.doi.org/10.1007/978-94-009-4838-9_6.

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Mukherjee, Swapna. "Mineralogy in Exploration of Mineral Deposits Using Magnetic, Electrical and Gravitational Properties". W Applied Mineralogy, 402–15. Dordrecht: Springer Netherlands, 2011. http://dx.doi.org/10.1007/978-94-007-1162-4_15.

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Streszczenia konferencji na temat "Mineral magnetic"

Fitzgerald, D., R. Wackerle i M. Morse. "Integrated 3D Modelling of Variable Magnetic Remanence Fields". W Mineral Exploration Symposium. European Association of Geoscientists & Engineers, 2020. http://dx.doi.org/10.3997/2214-4609.202089011.

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Saylymby, Dayana Yu, Petr G. Dyadkov i Nikolay Ed Mikhaltsov. "Curie temperature of the rocks of the Zarechenskay magnetic anomaly (East coast of Lake Baikal)". W Недропользование. Горное дело. Направления и технологии поиска, разведки и разработки месторождений полезных ископаемых. Экономика. Геоэкология. Федеральное государственное бюджетное учреждение науки Институт нефтегазовой геологии и геофизики им. А.А. Трофимука Сибирского отделения Российской академии наук, 2020. http://dx.doi.org/10.18303/b978-5-4262-0102-6-2020-064.

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The Curie temperature of rock samples of the Zarechenskaya magnetic anomaly region is determined. The source of this anomaly is an array of Archean rocks, composed mainly of gneiss–granits. The obtained values of the Curie temperature indicate that the magnetism of these rocks is due to magnetite. Both knowledge of the Curie temperature and the magnetic mineral responsible for the magnetism of this rock massive is important for interpreting the results of tectonomagnetic monitoring performed here since 1984, as well as for solving geothermal problems.

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Yang, Zhengtao, Ali Shaito i Nandika Anne D'Souza. "Magnetorheology of Multiwalled Carbon Nanotube Mineral Dispersions". W ASME 2006 International Mechanical Engineering Congress and Exposition. ASMEDC, 2006. http://dx.doi.org/10.1115/imece2006-16004.

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Multi-walled carbon nanotube (MWCNT) were dispersed in mineral oil and the magnetorheological response was measured. 0.5, 1.5 and 2.53 vol% nanotubes were dispersed in mineral oil. Strain sweep, frequency sweep, magneto sweep and steady shear tests were conducted in various magnetic field strengths. Storage modulus G', loss modulus G", complex viscosity η* and dynamic yield stress τy increased with magnetic field, which was partially attributed to the increasing degree of alignment of nanotubes in stronger magnetic field. G' and G" of MWCNT/mineral oil dispersions scaled with nanotube volume fraction φ by a power-law. The shear thinning behavior of MWCNT/mo dispersions followed the Ostwald-de Waele or power law.

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Fitriani, Dini, Kartika Hajar Kirana, Eleonora Agustine, Mia Uswatun Hasanah i dan Anggie Susilawati. "Magnetic susceptibility, morphological and magnetic mineral composition analysis on leachate sludge". W The 13th SEGJ International Symposium, Tokyo, Japan, 12-14 November 2018. Society of Exploration Geophysicists and Society of Exploration Geophysicists of Japan, 2019. http://dx.doi.org/10.1190/segj2018-116.1.

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Sankaya, M., M. Erdemoglu i T. Abbasov. "Investigations on high gradient magnetic separation processes in rheological media". W The 8th International Mineral Processing Symposium. Taylor & Francis Group, 6000 Broken Sound Parkway NW, Suite 300, Boca Raton, FL 33487-2742: CRC Press, 2017. http://dx.doi.org/10.4324/9780203747117-24.

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Makarchuk, Oksana, Tetiana Dontsova i Grigory Krymets. "Magnetic mineral nanocomposite sorbents for removal of surfactants". W 2017 IEEE 7th International Conference "Nanomaterials: Application & Properties" (NAP). IEEE, 2017. http://dx.doi.org/10.1109/nap.2017.8190406.

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Xu, Huifang, Seungyeol Lee, Hongwu Xu, Ryan Jacobs i Dane Morgan. "VALLEYITE: A NEW MAGNETIC MINERAL IN BASALTIC ROCKS". W GSA Annual Meeting in Seattle, Washington, USA - 2017. Geological Society of America, 2017. http://dx.doi.org/10.1130/abs/2017am-297685.

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Wang, Haijing, Boqin Sun, Zheng Yang, Scott Seltzer i Marcus Wigand. "Accurate Rock Mineral Characterization with Nuclear Magnetic Resonance". W Unconventional Resources Technology Conference. Tulsa, OK, USA: American Association of Petroleum Geologists, 2019. http://dx.doi.org/10.15530/urtec-2019-19.

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Rafiq, Muhammad, Chengrong Li, Yuzhen Lv, Kai Yi i Qian Sun. "Breakdown characteristics of mineral oil based magnetic nanofluids". W 2016 IEEE International Conference on High Voltage Engineering and Application (ICHVE). IEEE, 2016. http://dx.doi.org/10.1109/ichve.2016.7800768.

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Boylu, F., G. Ateşok i M. Doğan. "Effect of dispersant addition on separation of sulphur from coal by magnetic separation". W The 8th International Mineral Processing Symposium. Taylor & Francis Group, 6000 Broken Sound Parkway NW, Suite 300, Boca Raton, FL 33487-2742: CRC Press, 2017. http://dx.doi.org/10.4324/9780203747117-73.

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Raporty organizacyjne na temat "Mineral magnetic"

Rheault, M. M., R. Simard, P. Keating i M. M. Pelletier. Mineral exploration: digital image processing of LANDSAT, SPOT, magnetic and geochemical data. Natural Resources Canada/ESS/Scientific and Technical Publishing Services, 1990. http://dx.doi.org/10.4095/128045.

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Hayward, N., i V. Tschirhart. A comparison of 3-D inversion strategies in the investigation of the 3-D density and magnetic susceptibility distribution in the Great Bear Magmatic Zone, Northwest Territories. Natural Resources Canada/CMSS/Information Management, 2023. http://dx.doi.org/10.4095/331954.

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The inversion of new compilations of aeromagnetic data and gravity data are employed to investigate the 3-D physical property (magnetic susceptibility and density) distribution within the Great Bear magmatic zone. The application of two different software suites (Geosoft VOXI and UBC GIF MAG3D and GRAV3D) affords a comparison of approaches and results. The magnetic susceptibility results are broadly compatible, but Geosoft VOXI enabled more detailed definition of shallow sources. The density results were markedly different in how the model responded to the low-resolution gravity data in characterization of the near-surface. GRAV3D extrapolated shallow sources to surface, whereas Geosoft VOXI smoothed and closed the top of shallow sources below surface. The different magnetic susceptibility and density models can be used to assess the physical property distribution and relationships across the region. One approach, applied here, is to combine the near-surface magnetic susceptibility and density results to identify zones of coincidently high physical properties, a common physical proper relationship associated with IOCG mineral deposits. These integrated models highlight many of the region's known mineral occurrences and reveal other zones for further analysis.

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Hayward, N. 3D magnetic inversion of mineral prospects in the Great Bear Magmatic Zone, Northwest Territories. Natural Resources Canada/ESS/Scientific and Technical Publishing Services, 2013. http://dx.doi.org/10.4095/292662.

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Bristow, Q., i C. J. Mwenifumbo. A new temperature, capacitive-resistivity, and magnetic-susceptibility borehole probe for mineral exploration, groundwater, and environmental applications. Natural Resources Canada/ESS/Scientific and Technical Publishing Services, 2011. http://dx.doi.org/10.4095/289197.

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Thornell, Travis, Charles Weiss, Sarah Williams, Jennifer Jefcoat, Zackery McClelland, Todd Rushing i Robert Moser. Magnetorheological composite materials (MRCMs) for instant and adaptable structural control. Engineer Research and Development Center (U.S.), listopad 2020. http://dx.doi.org/10.21079/11681/38721.

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Magnetic responsive materials can be used in a variety of applications. For structural applications, the ability to create tunable moduli from relatively soft materials with applied electromagnetic stimuli can be advantageous for light-weight protection. This study investigated magnetorheological composite materials involving carbonyl iron particles (CIP) embedded into two different systems. The first material system was a model cementitious system of CIP and kaolinite clay dispersed in mineral oil. The magnetorheological behaviors were investigated by using parallel plates with an attached magnetic accessory to evaluate deformations up to 1 T. The yield stress of these slurries was measured by using rotational and oscillatory experiments and was found to be controllable based on CIP loading and magnetic field strength with yield stresses ranging from 10 to 104 Pa. The second material system utilized a polystyrene-butadiene rubber solvent-cast films with CIP embedded. The flexible matrix can stiffen and become rigid when an external field is applied. For CIP loadings of 8% and 17% vol %, the storage modulus response for each loading stiffened by 22% and 74%, respectively.

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Thomas, M. D. Spatial relationship between porphyritic Cu-Au mineral occurrences and magnetic signatures within the Iron Mask Batholith, south-central Cordillera, British Columbia. Natural Resources Canada/CMSS/Information Management, 2021. http://dx.doi.org/10.4095/327943.

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Mueller, C., S. J. Piercey, M. G. Babechuk i D. Copeland. Stratigraphy and lithogeochemistry of the Goldenville horizon and associated rocks, Baie Verte Peninsula, Newfoundland. Natural Resources Canada/CMSS/Information Management, 2021. http://dx.doi.org/10.4095/328990.

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The Goldenville horizon in the Baie Verte Peninsula is an important stratigraphic horizon that hosts primary (Cambrian to Ordovician) exhalative magnetite and pyrite and was a chemical trap for younger (Silurian to Devonian) orogenic gold mineralization. The horizon is overlain by basaltic flows and volcaniclastic rocks, is intercalated with variably coloured argillites and cherts, and underlain by mafic volcaniclastic rocks; the entire stratigraphy is cut by younger fine-grained mafic dykes and coarser gabbro. Lithogeochemical signatures of the Goldenville horizon allow it to be divided into high-Fe iron formation (HIF; &gt;50% Fe2O3), low-Fe iron formation (LIF; 15-50% Fe2O3), and argillite with iron minerals (AIF; &lt;15% Fe2O3). These variably Fe-rich rocks have Fe-Ti-Mn-Al systematics consistent with element derivation from varying mineral contributions from hydrothermal venting and ambient detrital sedimentation. Post-Archean Australian Shale (PAAS)-normalized rare earth element (REE) signatures for the HIF samples have negative Ce anomalies and patterns similar to modern hydrothermal sediment deposited under oxygenated ocean conditions. The PAAS-normalized REE signatures of LIF samples have positive Ce anomalies, similar to hydrothermal sediment deposited under anoxic to sub-oxic conditions. The paradoxical Ce behaviour is potentially explained by the Mn geochemistry of the LIF samples. The LIF have elevated MnO contents (2.0-7.5 weight %), suggesting that Mn from hydrothermal fluids was oxidized in an oxygenated water column during hydrothermal venting, Mn-oxides then scavenged Ce from seawater, and these Mn-oxides were subsequently deposited in the hydrothermal sediment. The Mn-rich LIF samples with positive Ce anomalies are intercalated with HIF with negative Ce anomalies, both regionally and on a metre scale within drill holes. Thus, the LIF positive Ce anomaly signature may record extended and particle-specific scavenging rather than sub-oxic/redox-stratified marine conditions. Collectively, results suggest that the Cambro-Ordovician Taconic seaway along the Laurentian margin may have been completely or near-completely oxygenated at the time of Goldenville horizon deposition.

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Magnetic data of magnetic mineral separates from core samples (200' - 823') from the U.S. Navy Simpson Core Test #18 well. Alaska Division of Geological & Geophysical Surveys, 1990. http://dx.doi.org/10.14509/18994.

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Maps showing distribution of anomalous concentrations of trace elements in the magnetic fraction of heavy-mineral concentrates, Domeland Wilderness and contiguous roadless areas, Kern and Tulare counties, California. US Geological Survey, 1985. http://dx.doi.org/10.3133/mf1395d.

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