Origin of the sedimentary magnetic record at Ocean Drilling Program Sites on the Owen Ridge, western Arabian Sea

J. Bloemendal; J. W. King; A. Hunt; P. B. Demenocal; A. Hayashida

doi:10.1029/92jb02914

journal article Mar 10, 1993

Origin of the sedimentary magnetic record at Ocean Drilling Program Sites on the Owen Ridge, western Arabian Sea

J. Bloemendal J. W. King A. Hunt P. B. Demenocal A. Hayashida

Journal of Geophysical Research: Oceans Vol. 98 No. B3 pp. 4199-4219 · American Geophysical Union (AGU)

View at Publisher Save 10.1029/92jb02914

Abstract

The 3.2‐m.y. whole core magnetic susceptibility record obtained during Ocean Drilling Program leg 117 from the Owen Ridge in the western Arabian Sea represents one of the most convincing demonstrations of the ability of rock magnetic measurements to yield paleoceanographically significant information. The salient features of this record are that (1) it correlates strongly with variations in the concentration and flux of eolian dust; (2) it is driven strongly at Earth orbital periodicities; and (3) there is a significant change in the spectral character at 2.4 m.y., which may reflect the effect of the initiation of major northern hemisphere glaciation on aridity cycles within the eolian source areas. In view of its potential paleoclimatic significance, we have examined the origin of the rock magnetic signal from the Owen Ridge in more detail. We find that despite the strong relationship throughout the record between magnetic susceptibility and percent terrigenous content, there has been significant postdepositional alteration of the magnetic minerals via the process of reductive diagenesis. We ascribe two steplike shifts in magnetic properties in the uppermost part of the section to this process. The first occurs at about 1.5 m depth and is characterized by a loss of fine‐grained ferrimagnetic material. The second stepshift in magnetic properties occurs at a depth of 6–8 m and is characterized by changes in rock magnetic parameters which indicate significant loss of both low coercivity (magnetite) and high coercivity (hematite and/or goethite) magnetic mineral components. Scanning electron microscope and energy dispersive Xray analyses show that the bulk of the coarse‐grained strongly magnetic fraction is detrital titanomagnetite and that there is a significant reduction in the Fe:Ti ratio of these grains across the lower diagenetic front. This suggests that titanomagnetite grains with higher Ti contents may be more resistant to the process of reductive diagenesis, and this may provide a mechanism for the relative stability of the ferrimagnetic fraction below the second diagenetic front.

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References

54

[1]

10.1016/0016-7037(84)90089-9

[2]

Evidence for a change in the periodicity of tropical climate cycles at 2.4 Myr from whole-core magnetic susceptibility measurements

Jan Bloemendal, Peter deMenocal

Nature 10.1038/342897a0

[3]

10.1029/pa003i001p00061

[4]

Bloemendal J. "Rock magnetic stratigraphy of leg 108 (eastern tropical Atlantic) sites 658, 659, 661 and 665" Proc. Ocean Drilling Program Sci. Results (1989)

[5]

10.1016/0016-7037(89)90005-7

[6]

10.1016/0016-7037(87)90076-7

[7]

10.1007/978-1-4613-0313-8_36

[8]

10.1016/0031-9201(87)90191-9

[9]

Channell J. E. T. "Contrasting magnetic properties in leg 107 sediments: Preservation and alteration of titanomagnetite at adjacent sites" Proc. Ocean Drilling Program Sci. Results (1990)

[10]

10.1029/pa005i002p00109

[11]

Clemens S. C. "One million year record of summer monsoon winds and continental aridity from the Owen Ridge (site 722), Northwest Arabian Sea" Proc. Ocean Drilling Program Sci. Results (1991)

[12]

DeMenocal P. B. "A rock‐magnetic record of monsoonal dust deposition to the Arabian Sea: evidence for a shift in the mode of deposition at 2.4 Ma" Proc. Ocean Drilling Program Sci. Results (1991)

[13]

10.1029/pa003i001p00089

[14]

10.1016/0016-7037(79)90095-4

[15]

Goldhaber M. B. I. R.Kaplan The sulfur cycle The Sea 5E. D.Goldberg 569–655 Wiley‐Interscience New York 1974.

[16]

10.2973/odp.proc.sr.105.150.1989

[17]

Hall F. R. "The relationship between variations in rock‐magnetic properties and grain size of sediments from ODP hole 645C" Proc. Ocean Drilling Program Sci. Results (1989)

[18]

10.1111/j.1365-246x.1982.tb05998.x

[19]

10.1111/j.1365-246x.1982.tb05999.x

[20]

Hayashida A. "Magnetostratigraphy of ODP leg 117 sediments from the Owen Ridge and the Oman Margin" Proc. Ocean Drilling Program Sci. Results (1991)

[21]

10.1029/jb095ib04p04405

[22]

10.1029/jb095ib04p04421

[23]

Diagenesis of magnetic minerals in Recent haemipelagic sediments

Robert Karlin, Shaul Levi

Nature 10.1038/303327a0

[24]

10.1029/jb090ib12p10373

[25]

10.1038/326490a0

[26]

10.1038/299538a0

[27]

10.1016/0012-821x(82)90142-x

[28]

10.1130/0091-7613(1984)12<559:umidsp>2.0.co;2

[29]

10.1016/0012-821x(72)90190-2

[30]

Kolla V. "Distribution and origins of clay minerals and quartz in surface sediments of the Arabian Sea" J. Sediment. Petrol. (1981)

[31]

10.1029/jb095ib04p04453

[32]

10.1029/jb095ib04p04437

[33]

Anaerobic production of magnetite by a dissimilatory iron-reducing microorganism

Derek R. Lovley, John F. Stolz, Gordon L. Nord et al.

Nature 10.1038/330252a0

[34]

10.1111/j.1365-246x.1988.tb03429.x

[35]

10.1029/jb087ib06p04807

[36]

10.1029/jb095ib04p04363

[37]

10.1016/s0140-1963(18)31249-7

[38]

10.1016/0012-821x(89)90147-7

[39]

Murray D. W. "Pliocene to Pleistocene variations in calcium carbonate, organic carbon, and opal on the Owen Ridge, northern Arabian Sea" Proc. Ocean Drilling Program Sci. Results (1991)

[40]

Pedersen T. F. "Interstitial water chemistry, leg 117: Contrasts with the Peru Margin" Proc. Ocean Drilling Program Sci. Results (1991)

[41]

10.1038/320611a0

[42]

Prell W. L. et al. Proceedings Ocean Drilling Program Inititial Results 117 Ocean Drilling Program College Station Texas 1989. 10.2973/odp.proc.ir.117.1989

[43]

10.2113/gsecongeo.73.8.1677

[44]

10.2475/ajs.275.6.636

[45]

10.1016/s0031-9201(86)80006-1

[46]

Robinson S. G. "Applications of whole‐core magnetic susceptibility measure‐ments of deep‐sea sediments: Leg 115 results" Proc. Ocean Drilling Program Sci. Results (1990)

[47]

10.1029/jd092id01p00933

[48]

Shimmield G. B. "The inorganic geochemical record of the northwest Arabian Sea: a history of productivity variation over the last 400 k.y. from sites 722 and 724" Proc. Ocean Drilling Program Sci. Results (1991)

[49]

Sirocko F. M.Sarnthein Wind‐borne deposits in the Northwestern Indian Ocean: Record of Holocene sediments versus modern satellite data Paleoclimatology and Paleometeorology Proceedings NATO Advanced Research Workshop ArizonaM.Leinen M.Sarnthein 401–433Kluwer Dordrecht 1989. 10.1007/978-94-009-0995-3_17

[50]

Sorensen J. "Reduction of ferric iron in anaerobic, marine sediment and interaction with the reduction of nitrate and sulfate" Appl. Environ. Microbiol. (1982) 10.1128/aem.43.2.319-324.1982

Showing 50 of 54 references

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Details

Published: Mar 10, 1993
Vol/Issue: 98(B3)
Pages: 4199-4219
License: View

Authors

Cite This Article

J. Bloemendal, J. W. King, A. Hunt, et al. (1993). Origin of the sedimentary magnetic record at Ocean Drilling Program Sites on the Owen Ridge, western Arabian Sea. Journal of Geophysical Research: Oceans, 98(B3), 4199-4219. https://doi.org/10.1029/92jb02914

Origin of the sedimentary magnetic record at Ocean Drilling Program Sites on the Owen Ridge, western Arabian Sea

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