Abstract
Rock magnetic properties of unconsolidated sediments from the Korea Deep Ocean Study area of the northeastern equatorial Pacific were analyzed to trace the time-dependent variations of sedimentary environments. For upper Pleistocene sediments, light-brown sediments predominate, whereas the lower sediments deposited in the late Pliocene are dark brown. Rock magnetic properties also clearly differ among the two distinct color environments. Values of anhysteretic remanent magnetization and low-field magnetic susceptibility are highly responsive to changes in the color of the sediment. For example, comparatively low values denote a dominance of coarse-grained magnetic minerals as observed in the lower dark-brown layers. With respect to the content of magnetic minerals, coarse magnetic grains are highly concentrated in the darker-colored sediment layers. However, both the magnetic mineral dependent parameter (S ratio) and results of the scanning electron microscope observation indicate that magnetic mineral changes did not occur along the core depth, which means that there was no apparent source change. Without distinctive source changes, the variations in the rock magnetic properties likely reflect a process by which the magnetic grains were primarily transported by enhanced wind and bottom currents and affected by diagenetic dissolution as a function of both the time from burial and the extremely low sedimentation rates after deposition.
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Aoki S, Kohyama N, Sudo T (1979) Mineralogical and chemical properties of smectite in sediment cores from southeastern Pacific. Deep-Sea Res 26:893–902
Bischoff JK, Heath GR, Leinen M (1979) Geochemistry of deepsea sediments from the Pacific manganese nodule province: DOMES site A, B and C. In: Bischoff JL, Piper DZ (eds) Marine geology and oceanography of the pacific manganese nodule province. Plenum, New York, pp 397–436
Bloemendal J, King JW, Hall FR, Doh SJ (1992) Rock magnetism of Late Neogene and Pleistocene deep-sea sediments: relationship to sediment source, diagenetic processes, and sediment lithology. J Geophys Res 97(B4):4361–4375
Bostock HC, Hayward BW, Neil HL, Currie KI, Dunbar GB (2011) Deep-water carbonate concentrations in the southwest Pacific. Deep-Sea Res Pt I 58(1):72–85
Channell JET, Hodell DA, Margari V, Skinner LC, Tzedakis PC, Kesler MS (2013) Biogenic magnetite, detrital hematite, and relative paleointensity in Quaternary sediments from the Southwest Iberian Margin. Earth Planet Sc Lett 376:99–109
Corliss BH, Hollister CD (1979) Cenozoic sedimentation in the central north Pacific. Nature 282:707–709
Deng C, Shaw J, Liu Q, Pan Y, Zhu R (2006) Mineral magnetic variation of the Jingbian loess/paleosol sequence in the northern Loess Plateau of China: implication for Quaternary development of Asian aridification and cooling. Earth Planet Sc Lett 271:248–259
Doh SJ, King JW, Leinen M (1988) A rock-magnetic study of giant piston core LL44-GPC3 from the central north Pacific and its paleoceanographic implication. Paleoceanography 3:89–111
Doh SJ (1989) Stratigraphic and sedimentological implications of rock-magnetic properties of marine sediments from the north west Pacific. J Geol Soc Korea 25:137–151
Evans ME, Heller F (2003) Environmental magnetism: principles and applications of enviromagnetics. Academic Press, Oxford, 299 p
Fostner U, Stoffer P (1981) Chemical fractionation of transition elements in Pacific pelagic sediments. Geochim Cosmochim Ac 45:1141–1146
Greenslate JL, Frazer JZ, Arrehenius G (1973) Origin and deposition of selected transition elements in the seabed. In: Morgenstein M (ed) The origin and distribution of manganese nodules in the Pacific and prospects for exploration. Hawaii Inst. Geophysics, Honolulu, pp 45–69
Hein GR, Ross CR, Alexander E (1979) Mineralogy and diagenesis of surface sediments. In: Bischoff JL, Piper DZ (eds) Marine geology and oceanography of the Pacific manganese nodule province. Plenum Press, New York, pp 365–396
Henshaw PC Jr, Merill RT (1980) Magnetic and chemical changes in marine sediments. Rev Geophys Space Phys 18:483–504
Horn DR, Horn BM, Delach MN (1973) Copper and nickel content of ocean ferromanganese deposits and their relation to properties of the substrate. In: Morgenstein M (ed) The origin and distribution of manganese nodules in the Pacific and prospects for exploration. Hawaii Inst. Geophysics, Honolulu, pp 71–76
Jacob MB, Hays JD (1972) Paleo-climate events indicated by mineralogical changes in deep-sea sediments. J Sediment Petrol 42:889–898
Janecek TR, Rea DK (1983) Eolian deposition in the northeast Pacific ocean: Cenozoic history of atmospheric circulation. Geol Soc Am Bull 94:730–738
Johnson HP, Kinoshita H, Merill RT (1975) Rock magnetism and paleomagnetism of some north Pacific deep-sea sediments. Geol Soc Am Bull 86:412–420
Jung HS, Lee CB, Jeong KP, Kang JK (1998) Geochemical and mineralogical characteristic in two-color core sediments from the Korea Deep Ocean Study (KODOS) area, northeast equatorial Pacific. Mar Geol 144:295–309
Karlin R (1990) Magnetic mineral diagenesis in suboxic sediments at Bettis site W-N, NE Pacific ocean. J Geophys Res 95:4421–4436
Karlin R, Levi S (1985) Diagenesis of magnetic minerals in recent hemipelagic sediments. J Geophys Res 90:10373–10392
Kent PV, Lowrie W (1974) Origin of magnetic instability in sediments cores from the central north Pacific. J Geophys Res 79:2987–3000
Kirschvink JL, Chang SR (1984) Ultra-fine grained magnetite in deep-sea sediments: possible bacterial magnetofossils. Geology 12:559–562
Korff L, Dobeneck T, Frederichs T, Kasten S, Kuhn G, Gersonde R, Diekmann B (2016) Cyclic magnetite dissolution in Pleistocene sediments of the abyssal northwest Pacific Ocean: evidence for glacial oxygen depletion and carbon trapping. Paleoceanography 31:600–624
Leslie BW, Lund PSP, Hammond DE (1990) Rock magnetic evidence for the dissolution and authigenic growth of magnetic minerals within anoxic marine sediments of the California continental borderland. J Geophys Res 95:4437–4452
Lovlie R, Lowrie W, Jacobs M (1971) Magnetic properties and mineralogy of four deep-sea cores. Earth Planet Sc Lett 15:157–168
Maher BA (1988) Magnetic properties of some synthetic submicron magnetite. Geophys J Int 94:83–96
Marchig V, Gundlach H (1981) Separation of iron from manganese and growth of manganese nodules as a consequence of diagenetic ageing of radiolarians. Mar Geol 40:35–43
Munsell (1975) Soil colour charts. Kollmorgen, Baltimore
Opdyke ND, Foster JH (1970) Paleomagnetism of cores from the north Pacific. Geol Soc Am Mem 126:83–119
Park CK, Doh SJ, Suk DW (2000) Sedimentary fabric on deep-sea sediments from KODOS area in the eastern Pacific. Mar Geol 171:115–125
Park CK, Son SK, Kim KH, Chi SB, Doh SJ (2004) Paleomagnetic results from deep-sea sediment of the Korea Deep Ocean Study (KODOS) area (northern equatorial Pacific) and their paleodepositional implications. Geo-Mar Lett 24:112–124
Park CK, Kim W, Ko Y, Lee HB, Moon JW, Doh SJ (2012) Paleomagnetic records and mineral-magnetic properties of deep-sea sediments in the NW Pacific: paleoenvironmental implication. Ocean Sci J 47:497–508
Piper DZ (1988) The metal oxide fraction of pelagic sediment in the equatorial north Pacific ocean: a source of metal in ferromanganese nodules. Geochim Cosmochim Ac 52:2127–2145
Prince RA, Heath GR, Kminz M (1980) Paleomagnetic studies of central north Pacific sediments cores: stratigraphy, sedimentation rates, and the origin of magnetic instability: summary. Geol Soc Am Bull 91:1789–1835
Sagnotti L, Macri P, Camerlenghi A, Rebesco M (2001) Environmental magnetism of Antarctic Late Pleistocene sediments and interhemispheric correlation of climatic events. Earth Planet Sc Lett 192:65–80
Smirnov AV, Tarduno JA (2000) Low-temperature magnetic properties of pelagic sediments (Ocean Drilling Program Site 805C): tracers of maghemitization and magnetic mineral reduction. J Geophys Res 105:16457–16471
Tarduno JA, Tian W, Wilkison S (1998) Biogeochemical remanent magnetization in pelagic sediments of the western equatorial Pacific Ocean. Geophys Res Lett 25:3987–3990
Tarduno JA (1994) Temporal trends of magnetic dissolution in the pelagic realm: gauging paleoproductivity? Earth Planet Sc Lett 123:39–48
Tarling DH, Hrouda F (1993) The magnetic anisotropy of rocks. Chapman & Hall, London, 218 p
Verosub KL, Roberts AP (1995) Environmental magnetism: past, present, and future. J Geophys Res 100:515–529
Yamazaki T, Ioka N (1997) Environmental rock-magnetism of pelagic clay: implications for Asian eolian input to the North Pacific since the Pliocene. Paleoceanography 12:111–124
Yamazaki T, Katsura T (1990) Magnetic grain size and viscous remanent magnetization of pelagic clay. J Geophys Res 95: 4373–4382
Yamazaki T, Katsura T, Marumo K (1991) Origin of stable remanent magnetization of siliceous sediments in the central equatorial Pacific. Earth Planet Sc Lett 105:81–93
Yamazaki T (2009) Environmental magnetism of Pleistocene sediments in the North Pacific and Ontong-Java Plateau: temporal variations of detrital and biogenic components. Geochem Geophy Geosy 10:1–18
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Park, C.K., Lee, G.C. Rock Magnetic Approaches Used on Deep-sea Sediments in the Northeastern Equatorial Pacific. Ocean Sci. J. 53, 369–380 (2018). https://doi.org/10.1007/s12601-018-0024-0
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DOI: https://doi.org/10.1007/s12601-018-0024-0