Artículo

Ludwig, P.; Egli, R.; Bishop, S.; Chernenko, V.; Frederichs, T.; Rugel, G.; Merchel, S.; Orgeira, M.J. "Characterization of primary and secondary magnetite in marine sediment by combining chemical and magnetic unmixing techniques" (2013) Global and Planetary Change. 110:321-339
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Abstract:

We present a novel technique for quantitative unmixing of primary and secondary ferrimagnetic minerals in sediments. Hysteresis and high-resolution first-order reversal curve (FORC) measurements are performed on sediment samples before and after digestion in a citrate-bicarbonate-dithionite (CBD) solution optimized for maximum selective extraction of secondary fine-grained iron oxides. The difference between magnetic measurements of untreated and CBD-treated sample materials is used to calculate the original magnetic signature of CBD-extractable minerals. A combination of selective chemical extraction and magnetic measurements suited for the detection of single-domain particles provides a cross-check between chemical and magnetic unmixing of primary and secondary iron oxides and resolves the non-uniqueness problem of numerical unmixing methods. A quantitative magnetic characterization of secondary ferrimagnetic minerals in a magnetofossil-rich pelagic carbonate is presented for the first time. It can be used for calibration of recently developed fast magnetic unmixing techniques. CBD-based Fe extraction from sediments with minimal clastic and/or aeolian inputs, such as pelagic carbonates, is particularly suited for the search for cosmogenic 60Fe signatures from supernova explosions, because 60Fe dilution by dissolved primary Fe-bearing minerals is minimized. © 2013 Elsevier B.V.

Registro:

Documento: Artículo
Título:Characterization of primary and secondary magnetite in marine sediment by combining chemical and magnetic unmixing techniques
Autor:Ludwig, P.; Egli, R.; Bishop, S.; Chernenko, V.; Frederichs, T.; Rugel, G.; Merchel, S.; Orgeira, M.J.
Filiación:Physik Department, Technische Universität München, 85748 Garching, Germany
Geomagnetism and Gravimetry, Central Institute for Meteorology and Geodynamics, 1190 Vienna, Austria
Department of Geosciences, Universität Bremen, 28359 Bremen, Germany
Helmholtz-Zentrum Dresden-Rossendorf, 01314 Dresden, Germany
Department of Geological Sciences, FCEyN University of Buenos Aires, and CONICET, Argentina
Palabras clave:Citrate-bicarbonate-dithionite extraction; First-order reversal curve; Magnetotactic bacteria and magnetofossils; Pelagic carbonates; Primary and secondary magnetic minerals; Supernova explosion signatures; First-order reversal curves; Magnetic minerals; Magnetotactic Bacteria; Pelagic carbonates; Supernova explosion; Chemical detection; Extraction; Iron oxides; Magnetic hysteresis; Magnetic variables measurement; Magnetism; Minerals; Numerical methods; Submarine geology; Sediments; bacterium; bicarbonate; carbonate; dilution; explosion; iron oxide; magnetite; measurement method; mineral; optimization; quantitative analysis; sediment analysis; sediment chemistry; Bacteria (microorganisms)
Año:2013
Volumen:110
Página de inicio:321
Página de fin:339
DOI: http://dx.doi.org/10.1016/j.gloplacha.2013.08.018
Título revista:Global and Planetary Change
Título revista abreviado:Global Planet. Change
ISSN:09218181
CODEN:GPCHE
Registro:https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_09218181_v110_n_p321_Ludwig

Referencias:

  • Abrajevitch, A., Kodama, K., Biochemical vs. detrital mechanism of remanence acquisition in marine carbonates: a lesson from the K-T boundary interval (2009) Earth Planet. Sci. Lett., 286, pp. 269-277
  • Abrajevitch, A., Kodama, K., Diagnenetic sensitivity of paleoenvironmental proxies: a rock magnetic study of Australian continental margin sediments (2011) Geochem. Geophys. Geosyst., 12, pp. Q05Z24
  • Bazylinski, D., Frankel, R., Magnetosome formation in prokaryotes (2004) Nat. Rev. Microbiol., 2, pp. 217-230
  • Billeaud, L., Lewis Pratson, E., Broglia, C., Lyle, M., Dadey, K., Data report: geochemical logging results from three lithospheric plates; Cocos, Nazca, and Pacific: Leg 138, sites 844 through 852 (1995) Proc. Ocean Drill. Program Sci. Results, 138, pp. 857-884
  • Bishop, S., Egli, R., Discovery prospects for a supernova signature of biogenic origin (2011) Icarus, 212, pp. 960-962
  • Canfield, D., Reactive iron in marine sediments (1989) Geochim. Cosmochim. Acta, 53, pp. 619-632
  • Carvallo, C., Dunlop, D., Özdemir, Ö., Experimental comparison of FORC and remanent Preisach diagrams (2005) Geophys. J. Int., 162, pp. 747-754
  • Chang, S.B., Kirschvink, J., Stolz, J., Biogenic magnetite as a primary remanence carrier in limestone deposits (1987) Phys. Earth Planet. Inter., 46, pp. 289-303
  • Chen, A., Egli, R., Moskowitz, B., First-order reversal curve (FORC) diagrams of natural and cultured biogenic magnetic particles (2007) J. Geophys. Res., 112, pp. B08S90
  • Dillon, M., Franke, C., Diagenetic alteration of natural Fe-Ti oxides identified by energy dispersive spectroscopy and low-temperature magnetic remanence and hysteresis measurements (2009) Phys. Earth Planet. Inter., 172, pp. 141-156
  • Dobeneck, T.V., Petersen, N., Vali, H., Bakterielle Magnetofossilien (1987) Geowiss. Unserer Zeit, 5, pp. 27-35
  • Dunin-Borkowski, R., McCartney, M., Frankel, R., Bazylinski, D., Pósfai, M., Buseck, P., Magnetic microstructure of magnetotactic bacteria by electron holography (1998) Science, 282, pp. 1868-1870
  • Dunlop, D., Theory and application of the Day plot (Mrs/Ms versus Hcr/Hc) 1. Theoretical curves and tests using titanomagnetite data (2002) J. Geophys. Res., 107, p. 2056
  • Dunlop, D., Theory and application of the Day plot (Mrs/Ms versus Hcr/Hc) 2. Applications to data for rocks, sediments, and soils (2002) J. Geophys. Res., 107, p. 2057
  • Egli, R., Analysis of the field dependence of remanent magnetization curves (2003) J. Geophys. Res., 108, p. 2081
  • Egli, R., Characterization of individual rock magnetic components by analysis of remanence curves, 1. Unmixing natural sediments (2004) Stud. Geophys. Geod., 48, pp. 391-446
  • Egli, R., Theoretical aspects of dipolar interactions and their appearance in first-order reversal curves of thermally activated single-domain particles (2006) J. Geophys. Res., 111, pp. B12S17
  • Egli, R., Theoretical considerations on the anhysteretic remanent magnetization of interacting particles with uniaxial anisotropy (2006) J. Geophys. Res., 111, pp. B12S18
  • Egli, R., VARIFORC: an optimized protocol for the calculation of non-regular first-order reversal curves (FORC) diagrams (2013) Global Planet. Chang., 110, pp. 298-316. , (in this issue)
  • Egli, R., Chen, A., Winkelhofer, M., Kodama, K., Horng, C., Detection of noninteracting single domain particles using first-order reveral curve diagrams (2010) Geochem. Geophys. Geosyst., 11, pp. Q01Z11
  • Erglis, K., Wen, Q., Ose, V., Zeltins, A., Sharipo, A., Janmey, P., Cebers, A., Dynamics of magnetotactic bacteria in a rotating magnetic field (2007) Biophys. J., 93, pp. 1402-1412
  • Esquivel, D., Lins de Barros, H., Motion of magnetotactic microorganisms (1986) J. Exp. Biol., 121, pp. 153-163
  • Fabian, K., Some additional parameters to estimate domain state from isothermal magnetization measurements (2003) Earth Planet. Sci. Lett., 213, pp. 337-345
  • Fabian, K., Approach to saturation analysis of hysteresis measurements in rock magnetism and evidence for stress dominated magnetic anisotropy in young mid-ocean ridge basalt (2006) Phys. Earth Planet. Inter., 154, pp. 299-307
  • Fabian, K., Dobeneck, T., Isothermal magnetization of samples with stable Preisach function: a survey of hysteresis, remanence, and rock magnetic parameters (1997) J. Geophys. Res., 102, pp. 17659-17667
  • Faivre, D., Schüler, D., Magnetotactic bacteria and magnetosomes (2008) Chem. Rev., 108, pp. 4875-4898
  • Faivre, D., Menguy, N., Guyor, F., Lopez, O., Zuddas, P., Morphology of nanomagnetite crystals: implications for formation conditions (2005) Am. Mineral., 90, pp. 1793-1800
  • Feige, J., Wallner, A., Winkler, S., Merchel, S., Fifield, L., Korschinek, G., Rugel, G., Breitschwerdt, D., The search for supernova-produced radionuclides in terrestrial deep-sea archives (2012) Publ. Astron. Soc. Aust., 29, pp. 109-114
  • Fitoussi, C., Raisbeck, G., Chemical procedure for extracting 129I, 60Fe and 26Al from marine sediments: Prospects for detection of a ~2.8 My old supernova (2007) Nucl. Inst. Methods Phys. Res. B, 259, pp. 351-358
  • Fitoussi, C., Raisbeck, G., Knie, K., Korschinek, G., Faestermann, T., Goriely, S., Lunney, D., Wallner, A., Search for supernova-produced 60Fe in a marine sediment (2008) Phys. Rev. Lett., 101, p. 121101
  • Franke, C., Dobeneck, T.V., Drury, M., Meeldijk, J., Magnetic petrology of equatorial Atlantic sediments: electron microscopy results and their implications for environmental magnetic interpretation (2007) Paleoceanography, 22, pp. PA4207
  • Gehring, A., Kind, J., Charialou, M., García-Rubio, I., The detection of magnetotactic bacteria and magnetofossils by means of magnetic anisotropy (2011) Earth Planet. Sci. Lett., 309, pp. 113-117
  • Geiss, C., Egli, E., Zanner, C., Direct estimates of pedogenic magnetite as a tool to reconstruct past climates from buried soils (2008) J. Geophys. Res., 113, pp. B11102
  • Giosan, L., Flood, R., Aller, R., Paleoceanographic significance of sediment color on western North Atlantic drifts: I. Origin of color (2002) Mar. Geol., 189, pp. 25-41
  • Hanzlik, M., (1999) Elektronenmikroskopische und magnetomineralogische Untersuchungen an magnetotaktischen Bakterien des Chiemsees und an bakteriellem Magnetit eisenreduzierender Bakterien, , (PhD thesis), Ludwig-Maximilians University, Germany
  • Hanzlik, M., Winkelhofer, M., Petersen, N., Pulsed-field-remanence measurements on individual magnetotactic bacteria (2002) J. Magn. Magn. Mater., 248, pp. 259-267
  • Harrison, R., Feinberg, J., FORCinel: an improved algorithm for calculating first-order reversal curve distributions using locally weighted regression smoothing (2008) Geochem. Geophys. Geosyst., 9, pp. Q05016
  • Heslop, D., Dillon, M., Unmixing magnetic remanence curves without a priori knowledge (2007) Geophys. J. Int., 170, pp. 556-566
  • Heslop, D., Roberts, A., A method for unmixing magnetic hysteresis loops (2012) J. Geophys. Res., 117, pp. B03103
  • Hesse, P., Evidence for bacterial palaeocological origin of mineral magnetic cycles in oxic and sub-oxic Tasman Sea sediments (1994) Mar. Geol., 117, pp. 1-17
  • Hunt, C., Singer, M., Kletetschka, G., TenPas, J., Verosub, K., Effect of citrate-bicarbonate-dithionite treatment on fine-grained magnetite and maghemite (1995) Earth Planet. Sci. Lett., 130, pp. 87-94
  • Itambi, A., Dobeneck, T., Dekkers, M., Frederichs, T., Magnetic mineral inventory of equatorial Atlantic Ocean marine sediments off Senegal - glacial and interglacial contrast (2010) Geophys. J. Int., 183, pp. 163-177
  • Jacobs, I., Bean, C., An approach to elongated fine-particle magnets (1955) Phys. Rev., 100, pp. 1060-1067
  • Just, J., Heslop, D., Von Dobeneck, T., Bickert, T., Dekkers, M., Frederichs, T., Meyer, T., Zabel, M., Multiproxy characterization and budgeting of terrigenous end-members at the NW African continental margin (2012) Geochem. Geophys. Geosyst., 130, pp. Q0AO01
  • Kind, J., Gehring, A., Winkelhofer, M., Hirt, A., Combined use of magnetometry and spectroscopy for identifying magnetofossils in sediments (2011) Geochem. Geophys. Geosyst., 12, pp. Q08008
  • King, J., Banerjee, S., Marvin, J., Özdemir, Ö., A comparison of different magnetic methods for determining the relative grain size of magnetite in natural materials: some results from lake sediments (1982) Earth Planet. Sci. Lett., 59, pp. 404-419
  • Knie, K., Korschinek, G., Faestermann, T., Dorfi, E., Rugel, G., Wallner, A., 60Fe anomaly in a deep-sea manganese crust and implications for a nearby supernova source (2004) Phys. Rev. Lett., 93, p. 17
  • Kobayashi, A., Kirschvink, J., Nash, C., Kopp, R., Sauer, D., Bertani, L., Voorhout, W., Taguchi, T., Experimental observation of magnetosome chain collapse in magnetotactic bacteria: sedimentological, paleomagnetic, and evolutionary implications (2006) Earth Planet. Sci. Lett., 245, pp. 538-550
  • Kruiver, P., Dekkers, M., Heslop, D., Quantification of magnetic coercivity components by the analysis of acquisition curves of isothermal remanent magnetization (2001) Earth Planet. Sci. Lett., 189, pp. 269-276
  • Lanci, L., Kent, D., Introduction of thermal activation in forward modeling of hysteresis loops for single-domain magnetic particles and implications for the interpretation of the Day diagram (2003) J. Geophys. Res., 108, p. 2142
  • Lascu, I., Banerjee, S., Berquó, T., Quantifying the concentration of ferrimagnetic particles in sediments using rock magnetic methods (2010) Geochem. Geophys. Geosyst., 11, pp. Q08Z19
  • Leslie, B., Hammond, D., Berelson, W., Lund, S., Diagenesis in anoxic sediments from the California continental borderland and its influence on iron, sulphur, and magnetite behavior (1990) J. Geophys. Res., 95, pp. 4453-4470
  • Lin, W., Pan, Y., Uncultivated magnetotactic cocci from Yuandadu Park in Beijing, China (2009) Appl. Environ. Microbiol., 75, pp. 4046-4052
  • Lins, U., McCartney, M., Farina, M., Frankel, R., Buseck, P., Habits of magnetosome crystals in coccoid magnetotactic bacteria (2005) Appl. Environ. Microbiol., 71, pp. 4902-4905
  • Lovley, D., Stolz, J., Phillips, E., Anaerobic production of magnetite by a dissimilatory iron-reducing microorganism (1987) Nature, 330, pp. 252-254
  • Lyle, M., Dadey, K., Farrell, J., The late Miocene (11-8Ma) Eastern Pacific carbonate crash: evidence for reorganization of deep-water circulation by the closure of the Panama gateway (1995) Proc. Ocean Drill. Program Sci. Results, 138, pp. 821-838
  • Maher, B., Magnetic properties of some synthetic sub-micron magnetites (1988) Geophys. J., 94, pp. 83-96
  • Mayer, L., Pisias, N., Janecek, T., Shipboard scientific party. Site 848 (1992) Proc. ODP, Init. Repts., College Station, TX, 138, pp. 677-734
  • Mayergoyz, I., Mathematical models of hysteresis (1986) Phys. Rev. Lett., 56, pp. 1518-1521
  • McNeill, D., Kirschvink, J., Early dolomitization of platform carbonates and the preservation of magnetic polarity (1993) J. Geophys. Res., 98, pp. 7977-7986
  • Mehra, O., Jackson, M., Iron oxide removal from soils and clays by a dithionite-citrate system buffered with sodium bicarbonate (1958) Clay Clay Miner., 7, pp. 317-327
  • Meldrum, F., Mann, S., Heywood, B., Frankel, R., Bazylinski, D., Electron microscopy study of magnetosomes in two cultured vibrioid (1993) Proc. R. Soc. Lond. B, 251, pp. 237-242
  • Merchel, S., Herpers, U., An update on radiochemical separation techniques for the determination of long-lived radionuclides via accelerator mass spectrometry (1999) Radiochim. Acta, 84, pp. 215-219
  • Moskowitz, B., Frankel, R., Bazylinski, D., Jannasch, H., Lovley, D., A comparison of magnetite particles produced anaerobically by magnetotactic and dissimilatory iron-reducing bacteria (1989) Geophys. Res. Lett., 16, pp. 665-668
  • Moskowitz, B., Frankel, R., Bazylinski, D., Rock magnetic criteria for the detection of biogenic magnetite (1993) Earth Planet. Sci. Lett., 120, pp. 283-300
  • Muxworthy, A., Dunlop, D., First-order reversal curve (FORC) diagrams for pseudo-single-domain magnetites at high temperature (2002) Earth Planet. Sci. Lett., 203, pp. 369-382
  • Muxworthy, A., Williams, W., Virdee, D., Effect of magnetostatic interactions on the hysteresis parameters of single-domain and pseudo-single-domain grains (2003) J. Geophys. Res., 108, p. 2517
  • Muxworthy, A., Heslop, D., Williams, W., Influence of magnetosotatic interactions on first-order-reversal-curve (FORC) diagrams: a micromagnetic approach (2004) Geophys. J. Int., 158, pp. 888-897
  • Néel, L., Théorie du trainage magnétique des ferromagnétiques en grains fins avec applications aux terres cuites (1949) Annales de Géophysique, 5, pp. 99-136
  • Néel, L., Sur les effets d'un couplage entre grains ferromagnétiques doués d'hystérésis (1958) Acad. Sci. Seance, pp. 2313-2319
  • Newell, A., A high-precision model of first-order reversal curve (FORC) functions for single-domain ferromagnets with uniaxial anisotropy (2005) Geochem. Geophys. Geosyst., 6, pp. Q05010
  • Newell, A., Transition to superparamagnetism in chains of magnetosome crystals (2009) Geochem. Geophys. Geosyst., 10, pp. Q11Z08
  • Newell, A., Merrill, R., Single-domain critical sizes for coercivity and remanence (1999) J. Geophys. Res., 104, pp. 617-628
  • Nogueira, F., Lins de Barros, G., Study of the motion of magnetotactic bacteria (1995) Eur. Biophys. J., 245, pp. 13-21
  • Pan, X., Petersen, N., Davila, A., Zhang, L., Winkelhofer, M., Liu, Q., Hanzlik, M., Zhu, R., The detection of bacterial magnetite in recent sediments of Lake Chiemsee (southern Germany) (2005) Earth Planet. Sci. Lett., 232, pp. 109-123
  • Penninga, I., de Waard, H., Moskowitz, B., Bazylinski, D., Frankel, R., Remanence measurements on individual magnetotactic bacteria using a pulsed magnetic field (1995) J. Magn. Magn. Mater., 149, pp. 279-286
  • Petermann, H., (1994) Magnetotaktische Bakterien und ihre Magnetosome in Oberflächensedimenten des Südatlantiks, , (PhD thesis), University of Bremen, Germany
  • Petermann, H., Bleil, U., Detection of live magnetotactic bacteria in South Atlantic deepsea sediments (1993) Earth Planet. Sci. Lett., 117, pp. 223-228
  • Pike, C., Fernandez, A., An investigation of magnetic reversal in submicron-scale Co dots using first order reversal curve diagrams (1999) J. Appl. Phys., 85, pp. 6668-6676
  • Pike, C., Roberts, A., Verosub, K., First-order reversal curve diagrams and thermal relaxation effects in magnetic particles (2001) Geophys. J. Int., 145, pp. 721-730
  • Pisias, N., Mayer, L., Mix, A., Paleoceanography of the eastern equatorial Pacific during the Neogene: synthesis of Leg 138 drilling results (1995) Proc. Ocean Drill. Program Sci. Results, 138, pp. 5-21
  • Preisach, F., Über die magnetische Nachwirkung (1935) Z. Phys., 94, pp. 277-302
  • Proksch, R., Schäffer, T., Moskowitz, B., Dahlberg, E., Bazylinski, D., Frankel, R., Magnetic force microscopy of the submicron magnetic assembly in a magnetotactic bacterium (1995) Appl. Phys. Lett., 66, pp. 2582-2584
  • Reich, M., Formation of cristobalite nanofibers during explosive volcanic eruptions (2009) Geology, 37, pp. 435-438
  • Roberts, A., Pike, C., Verosub, K., First-order reversal curve diagrams: a new tool for characterizing the magnetic properties of natural samples (2000) J. Geophys. Res., 105, pp. 28461-28475
  • Roberts, A., Florindo, F., Villa, G., Chang, L., Jovane, L., Bohaty, S., Larrasoaña, J., Magnetotactic bacterial abundance in pelagic marine environments is limited by organic carbon flux and availability of dissolved iron (2011) Earth Planet. Sci. Lett., 310, pp. 441-452
  • Roberts, A., Chang, L., Heslop, D., Florindo, F., Larrasoaña, J., Searching for single domain magnetite in the 'pseudo-single-domain' sedimentary haystack: implications of biogenic magnetite preservation for sediment magnetism and relative paleointensity determinations (2012) J. Geophys. Res., 117, pp. B08104
  • Robertson, D., France, D., Discrimination of remanence-carrying minerals in mixtures, using isothermal remanent magnetization acquisition curves (1994) Phys. Earth Planet. Inter., 82, pp. 223-234
  • Sarmiento, J., Gruber, N., (2006) Ocean Biogeochemical Dynamics, , Princeton University Press, Princeton, (503 pp.)
  • Shcherbakov, V., Winklhofer, M., Hanzlik, M., Petersen, N., Elastic stability of chains of magnetosomes in magnetotactic bacteria (1997) Eur. Biophys. J., 26, pp. 319-326
  • Straub, S., Schmincke, H., Evaluating the tephra input into Pacific Ocean sediments: distribution in space and time (1998) Geol. Rundsch., 87, pp. 461-476
  • Vali, H., Förster, O., Amarantidis, G., Petersen, N., Magnetotactic bacteria and their magnetofossils in sediments (1987) Earth Planet. Sci. Lett., 86, pp. 389-400
  • Van Oorschot, I., Dekkers, M., Havlicek, P., Selective dissolution of magnetic iron oxides with the acid-ammonium-oxalate/ferrous-iron extraction technique - II. Natural leass and paleosol samples (2002) Geophys. J. Int., 149, pp. 106-117
  • Verosub, K., Fine, P., Singer, M., TenPas, J., Pedogenesis and paleoclimate: interpretation of the magnetic susceptibility record of Chinese loess - paleosol sequences (1993) Geology, 21, pp. 1011-1014
  • Vidic, N., TenPas, J., Verosub, K., Singer, M., Separation of pedogenic and lithogenic components of magnetic susceptibility in the Chinese loess/paleosol sequence as determined by the CBD procedure and a mixing analysis (2000) Geophys. J. Int., 142, pp. 551-562
  • Vlag, P., Kruiver, P., Dekkers, M., Evaluating climate change by multivariate statistical techniques on magnetic and chemical properties of marine sediments (Azores region) (2004) Palaeogeogr. Palaeoclimatol. Palaeoecol., 212, pp. 23-44
  • Wada, K., Greenland, D., Selective dissolution and differential infrared spectroscopy for characterization of 'amorphous' constituents in soil clays (1970) Clay Miner., 8, pp. 241-254
  • Watkins, S., Maher, B., Magnetic characterization of present-day deep-sea sediments and sources in the North Atlantic (2003) Earth Planet. Sci. Lett., 214, pp. 379-394
  • Watt, S., Pyle, D., Mather, T., Martin, R., Matthews, N., Fallout and distribution of volcanic ash over Argentina following the May 2008 explosive eruption of Chaitén, Chile (2009) J. Geophys. Res., 114, pp. B04207
  • Yamazaki, T., Magnetostatic interactions in deep-sea sediments inferred from first-order reversal curve diagrams: implications for relative paleointensity normalization (2008) Geochem. Geophys. Geosyst., 9, pp. Q02005
  • Yamazaki, T., Environmental magnetism of Pleistocene sediments in the North Pacific and Ontong-Java Plateau: temporal variations of detrital and biogenic components (2009) Geochem. Geophys. Geosyst., 10, pp. Q07Z04
  • Yamazaki, T., Paleoposition of the intertropical convergence zone in the eastern Pacific inferred from glacial-interglacial changes in terrigenous and biogenic magnetic mineral fractions (2012) Geology, 40, pp. 151-154
  • Yamazaki, T., Ikehara, M., Origin of magnetic mineral concentration variation in the Southern Ocean (2012) Paleoceanography, 27, pp. PA2206
  • Yamazaki, T., Solheid, P., Maghemite-to-magnetite reduction across the Fe-redox boundary in a sediment core from the Ontong-Java Plateau: influence on relative palaeointensity estimation and environmental magnetic application (2011) Geophys. J. Int., 185, pp. 1243-1254

Citas:

---------- APA ----------
Ludwig, P., Egli, R., Bishop, S., Chernenko, V., Frederichs, T., Rugel, G., Merchel, S.,..., Orgeira, M.J. (2013) . Characterization of primary and secondary magnetite in marine sediment by combining chemical and magnetic unmixing techniques. Global and Planetary Change, 110, 321-339.
http://dx.doi.org/10.1016/j.gloplacha.2013.08.018
---------- CHICAGO ----------
Ludwig, P., Egli, R., Bishop, S., Chernenko, V., Frederichs, T., Rugel, G., et al. "Characterization of primary and secondary magnetite in marine sediment by combining chemical and magnetic unmixing techniques" . Global and Planetary Change 110 (2013) : 321-339.
http://dx.doi.org/10.1016/j.gloplacha.2013.08.018
---------- MLA ----------
Ludwig, P., Egli, R., Bishop, S., Chernenko, V., Frederichs, T., Rugel, G., et al. "Characterization of primary and secondary magnetite in marine sediment by combining chemical and magnetic unmixing techniques" . Global and Planetary Change, vol. 110, 2013, pp. 321-339.
http://dx.doi.org/10.1016/j.gloplacha.2013.08.018
---------- VANCOUVER ----------
Ludwig, P., Egli, R., Bishop, S., Chernenko, V., Frederichs, T., Rugel, G., et al. Characterization of primary and secondary magnetite in marine sediment by combining chemical and magnetic unmixing techniques. Global Planet. Change. 2013;110:321-339.
http://dx.doi.org/10.1016/j.gloplacha.2013.08.018