Dr David Heslop

Fellow
+61 2 61259597

Profile

Biography

I moved to Australia 2010 and became an ANU Visiting Fellow working with Andrew Roberts at the Research School of Earth Sciences. In February 2011 I became a Research Fellow at RSES, working on the ARC Discovery Project “Australian Dust: its response to, and role in, climate change”. Since 2012, I have also worked on the ARC Discovery projects; "How do sediments become magnetised? Construction of an empirical-numerical framework" and "Driving a palaeomagnetic revolution: geophysical and environmental signals from magnetic biominerals". You can find more information about these projects on my Research page.

Research

Research interests

My research interests are varied, my Publication list shows the type of problems I'm working on. Most of my work is in rock magnetism, but I have also spent time working on problems in climate modelling, time series analysis and statistics.

Previous Research Projects

Unmixing magnetic remanence curves without a priori knowledge

Many of the natural materials studied in rock and environmental magnetism contain a mixed assemblage of mineral grains with a variety of different origins. Mathematical decomposition of the bulk magnetic mineral assemblage into populations with different properties can therefore be a source of useful environmental information.

Software: IRM-Unmixer is a stand-alone application which will help you to produce a linear mixture model for your own IRM acquisition data. Please contact me by email if you would like a copy of IRM-Unmixer.

Using non-negative matrix factorization in the unmixing of diffuse reflectance spectra

Diffuse reflectance spectroscopy (DRS) determines the “colour” of sediment across a given range of wavelengths. A Minolta 2002C instrument is used routinely on research cruises to measure percentage reflectance at 10 nm increments across the visible wavelength band (400 and 700 nm). The DRS spectra of natural sediments do however represent a composite signal of the different constituent minerals; therefore it is necessary to “unmix” the data to obtain information on specific materials.

Software: DRS-Unmixer is a stand-alone application which will help you to produce a linear mixture model for your own DRS data sets. Please contact me by email if you would like a copy of DRS-Unmixer.

Publications

My ResearcherID - Here
 

2015

  • [71] A. Morley, D. Heslop, C. Rühlemann, S. Mulitza, A. Paul and M. Schulz (2014). Detecting Holocene changes in the Atlantic Meridional Overturning Circulation: Integration of Proxy Data and Climate Simulations (DAMOCLES) in: Integrated Analysis of Interglacial Climate Dynamics (INTERDYNAMIC), edited by: Schulz, M., and Paul, A., SpringerBriefs in Earth System Sciences, 2014 (in press).
  • [70] P. Hu, Q. Liu, D. Heslop, A. P. Roberts and C. Jin (2015). Soil moisture balance and magnetic enhancement in loess-paleosol sequences from the Tibetan Plateau and Chinese Loess Plateau. Earth and Planetary Science Letters, 409, 120-132.

2014

  • [69] X. Pan, Z. Shen, A. P. Roberts, D. Heslop and L. Shi (2014). Syntectonic emplacement of Late Cretaceous mafic dyke swarms in coastal southeastern China: Insights from magnetic fabrics, rock magnetism and field evidence. Tectonophysics, 637, 328-340.
  • [68] L. Chang, A. P. Roberts, M. Winklhofer, D. Heslop, M. J. Dekkers, W. Krijgsman, J. D. Fitz Gerald and P. Smith (2014). Magnetic detection and characterization of biogenic magnetic minerals: A comparison of ferromagnetic resonance and first-order reversal curve diagrams. Journal of Geophysical Research, 119, 6136-6158, doi:10.1002/2014JB011213.
  • [67] A. P. Roberts, D. Heslop and X. Zhao (2014). Understanding fine magnetic particle systems through use of first-order reversal curve (FORC) diagrams. Reviews of Geophysics, 52, doi:10.1002/2014RG000462.
  • [66] K. M. Grant, E. J. Rohling, C. Bronk Ramsey, H. Cheng, R. L. Edwards, F. Florindo, D. Heslop, F. Marra, A. P. Roberts, M. E. Tamisiea and F. Williams (2014). Sea-level variability over five glacial cycles. Nature Communications, 5, 5076, doi:10.1038/ncomms6076.
  • [65] E. Ingham, D. Heslop, A. P. Roberts, R. Hawkins and M. Sambridge (2014). Is there a link between geomagnetic reversal frequency and paleointensity? A Bayesian approach. Journal of Geophysical Research, 119, 5290-5304, doi:10.1002/2014JB010947.
  • [64] M. J. Dekkers, D. Heslop, E. Herrero-Bervera, G. Acton and D. Krasa (2014). Insights into magmatic processes and hydrothermal alteration of in situ superfast spreading ocean crust at ODP/IODP Site 1256 from a cluster analysis of rock magnetic properties. Geochemistry, Geophysics, Geosystems, 15, 3430-3447, doi:10.1002/2014GC005343.
  • [63] D. Heslop, A.P. Roberts and L. Chang (2014). Characterizing magnetofossils from first-order reversal curve (FORC) central ridges. Geochemistry, Geophysics, Geosystems, 15, 2170-2179, doi:10.1002/2014GC005291.
  • [62] T. Ouyang, D. Heslop , A.P. Roberts , C. Tian , Z. Zhu , Y. Qiu , X. Peng (2014). Variable remanence acquisition efficiency in sediments containing biogenic and detrital magnetite: implications for relative paleointensity signal recording. Geochemistry, Geophysics, Geosystems, 15, 2780-2796, doi:10.1002/2014GC005301.
  • [61] A. Govin, C. Chiessi, M. Zabel, A.O. Sawakuchi, D. Heslop, T. Hörner, Y. Zhang and S. Mulitza (2014) Terrigenous input off northern South America driven by changes in Amazonian climate and the North Brazil Current retroflection during the last 250 ka, Climate of the Past, 10, 843-862.
  • [60] J.Nie, R. Zhang, C. Necula, D. Heslop, Q. Liu, L. Gong, S. Banerjee (2014). Late Miocene-early Pleistocene paleoclimate history of the Chinese Loess Plateau revealed by remanence unmixing. Geophysical Research Letters, 41, 2163-2168.
  • [59] D. Heslop, A.P. Roberts, R. Hawkins (2014). A statistical simulation of magnetic particle alignment in sediments. Geophysical Journal International, doi:10.1093/gji/ggu038.
  • [58] U. Proske, D. Heslop, S. Haberle (2014). A Holocene record of coastal landscape dynamics in the eastern Kimberley region, Australia. Journal of Quaternary Science, doi:10.1002/jqs.2691.

2013

  • [57] D. Heslop, A.P. Roberts, L. Chang, M. Davies, A. Abrajevitch and P. De Deckker (2013). Quantifying magnetite magnetofossil contributions to sedimentary magnetizations. Earth and Planetary Science Letters, 382, 58-65, doi:10.1016/j.epsl.2013.09.011.
  • [56] L. Chang, M. Winklhofer, A.P. Roberts, D. Heslop, F. Florindo, M.J. Dekkers, W. Krijgsman, K. Kodama and Y. Yamamoto (2013). Low-temperature magnetic properties of pelagic carbonates: oxidation of biogenic magnetite and identification of magnetosome chains. Journal of Geophysical Research, 118, 1-17, doi:10.1002/2013/JB010381.
  • [55] A.P. Roberts, F. Florindo, L. Chang, D. Heslop, L. Jovane and J.C. Larrasoana (2013). Magnetic properties of pelagic marine carbonates. Earth-Science Reviews, 127, 111-139.
  • [54] D. Heslop and A.P. Roberts (2013). Calculating uncertainties on predictions of palaeoprecipitation from the magnetic properties of soils. Global and Planetary Change (in press), doi: 10.1016/j.gloplacha.2012.11.013.
  • [53] J.A. Collins, A. Govin, S. Mulitza, D. Heslop, M. Zabel, J. Hartmann, U. Rohl and G. Wefer (2013). Abrupt shifts of the Sahara-Sahel boundary during Heinrich stadials, Climate of the Past, 9, 1181-1191, doi: 10.5194/cp-9-1181-2013.
  • [52] A.P. Roberts, L. Tauxe and D. Heslop (2013). Magnetic paleointensity stratigraphy and high resolution Quaternary geochronology. Successes and future challenges. Quaternary Science Reviews, 61, 1-16, doi: 10.1016/j.quascirev.2012.10.036.
  • [51] C. Necula, C. Panaiotu, D. Heslop and D. Dimofte (2013). Climatic control of magnetic granulometry in the Mircea Vodă loess/paleosol sequence (Dobrogea, Romania). Quaternary International, 293, 5-14, doi: 10.1016/j.quaint.2012.03.043.

2012

  • [50] J. Just, D. Heslop, T. von Dobeneck, T. Bickert, M.J. Dekkers, T. Frederichs, I. Meyer and M. Zabel (2012). Multi-proxy characterization and budgeting of terrigenous end-members at the NW African continental margin. Geochemistry, Geophysics, Geosystems, 13, Q0AO01, doi: 10,1029/2012GC004148.
  • [49] A.P. Roberts, L. Chang, D. Heslop, F. Florindo & J.C. Larrasoaña (2012). Searching for single domain magnetite in the ‘pseudo-single-domain’ sedimentary haystack: implications of biogenic magnetite preservation for sediment magnetism and relative paleointensity determinations, Journal of Geophysical Research, 117, B08104, doi:10.1029/2012JB009412, 2012.
  • [48] J. Lippold, S. Mulitza, G. Mollenhauer, S. Weyer, D. Heslop and M. Christl (2012). Boundary scavenging at the east Atlantic margin does not negate use of 231Pa/230Th to trace Glacial Atlantic overturning. Earth and Planetary Science Letters, 333-334, 317-331.
  • [47] D. Heslop and A.P. Roberts (2012). A method for unmixing magnetic hysteresis loops. Journal of Geophysical Research, 117, B03103, doi:10.1029/2011JB008859.
  • [46] A. Govin, U. Holzwarth, D. Heslop, L. Ford Keeling, M. Zabel, S. Mulitza, J. A. Collins and C.M. Chiessi (2012). Distribution of major elements in Atlantic surface sediments (36N-49S): imprint of terrigenous input and continental weathering. Geochemistry, Geophysics, Geosystems, 13, Q01013, doi:10.1029/2011GC003785.
  • [45] D. Heslop and A.P. Roberts (2012). Estimation of significance levels and confidence intervals for first-order reversal curve distributions. Geochemistry, Geophysics, Geosystems, 13: Q12Z40, doi:10.1029/2012GC004115.
  • [44] D. Heslop and A.P. Roberts (2012). Estimating best-fit binary mixing lines in the Day plot. Journal of Geophysical Research, 117, B01101, doi:10.1029/2011JB008787.
  • [43] D. Heslop and A. Paul (2011). Fingerprinting of the Atlantic meridional overturning circulation in climate models to aid in the design of proxy investigations. Climate Dynamics, doi:10.1007/s00382-011-1042-0.

2011

  • [42] Y. Suganuma, J. Okuno, D. Heslop, A.P. Roberts, T. Yamazaki & Y. Yokoyama (2011). Post-depositional remanent magnetization lock-in for marine sediments deduced from 10Be and paleomagnetic records through the Matuyama-Brunhes boundary, Earth and Planetary Science Letters, 311, 39-52, 2011.
  • [41] A.P. Roberts, F. Florindo, G. Villa, L. Chang, L. Jovane, S.M. Bohaty, J.C. Larrasoaña, D. Heslop and J.D. Fitz Gerald (2011). Magnetotactic bacterial abundance in pelagic marine environments is limited by organic carbon flux and availability of dissolved iron, Earth and Planetary Science Letters (in press), doi:10.1016/j.epsl.2011.08.011.
  • [40] J.A. Collins, E. Schefuß, D. Heslop, S. Mulitza, M. Prange, M. Zabel, R. Tjallingii, T.M. Dokken, E. Huang, A. Mackensen, M. Schulz, J. Tian, M. Zarriess and G. Wefer (2011). Interhemispheric symmetry of the tropical African rainbelt over the past 23,000 years. Nature Geoscience 4, 42-45, doi:10.1038/ngeo1039.
  • [39] D. Heslop, S. De Schepper and U. Proske (2011). Diagnosing the uncertainty of taxa relative abundances derived from count data. Marine Micropaleontology, 79, 114-120,  doi:10.1016/j.marmicro.2011.01.007.
  • [38] D. Heslop and A. Paul (2011). Can oceanic paleothermometers reconstruct the Atlantic Multidecadal Oscillation? Climate of the Past, 7, 151-159, doi:10.5194/cp-7-151-2011.
  • [37] A.R. Muxworthy and D. Heslop (2011). A Preisach method to estimate absolute paleofield intensity under the constraint of using only isothermal measurements: 1. theoretical framework. Journal of Geophysical Research, 116, B04102, doi:10.1029/2010JB007843.
  • [36] A.R. Muxworthy, D. Heslop, G.A. Paterson et al. (2011). A Preisach method to estimate absolute paleofield intensity under the constraint of using only isothermal measurements: 2. experimental testing. Journal of Geophysical Research, 116, B04103, doi:10.1029/2010JB007844. 

2010

  • [35] G. A. Paterson, D. Heslop and A. R. Muxworthy (2010). Deriving confidence in palaeointensity estimates. Geochemistry, Geophysics, Geosystems, 11, Q07Z18, doi:10.1029/2010GC003071.
  • [34] S. Mulitza, D. Heslop, D. Pittauerova, H. W. Fischer, I. Meyer, J.-B. Stuut, M. Zabel, G. Mollenhauer, J. A. Collins, H. Kuhnert and M. Schulz (2010). Increase in African dust flux at the onset of commercial agriculture in the Sahel region. Nature, 466, 226-228. doi:10.1038/nature09213.
  • [33] J. Nizou, T.J.J. Hanebuth, D. Heslop, T. Schwenk, L. Palamenghi, J.-B. Stuut and R. Henrich (2010). The Senegal River mud belt: A high-resolution archive of paleoclimatic change and coastal evolution. Marine Geology, 278, 150-164, doi:10.1016/j.margeo.2010.10.002
  • [32] A. Bamberg, Y. Rosenthal, A. Paul, D. Heslop, S. Mulitza, C. Ruhlemann and M. Schulz (2010). Reduced North Atlantic Central Water formation in response to early Holocene ice-sheet melting. Geophysical Research Letters, 37, L17705, doi:10.1029/2010GL043878.
  • [31] C. M. Köhler, W. Krijgsman, D. J. J. van Hinsbergen, D. Heslop and G. Dupont-Nivet (2010). Concurrent tectonic and climatic changes recorded in upper Tortonian sediments from the Eastern Mediterranean. Terra Nova, 22(1) 52-63. doi:10.1111/j.1365-3121.2009.00916.x
  • [30] S. Rauch, B. Peucker-Ehrenbrink, M. Kylander, D. Weiss, A. Martínez-Cortizas, D. Heslop, C. Olid, T. Mighall and H. Hemond (2010). Anthropogenic forcings on the surficial osmium cycle. Environmental Science & Technology, 44(3), 881-887, doi:10.1021/es901887f.
  • [29] C. M. Köhler, D. Heslop, W. Krijgsman and M. J. Dekkers (2010). Late Miocene paleoenvironmental changes in North Africa and the Mediterranean recorded by geochemical proxies (Monte Gibliscemi section, Sicily). Palaeogeography, Palaeoclimatology, Palaeoecology, 285, 66-73, doi:10.1016/j.palaeo.2009.10.025.

2009

  • [28] D. Heslop (2009). Statistical analysis of the rock magnetic S-ratio. Geophysical Journal International, 178(1), 159-161, doi:10.1111/j.1365-246X.2009.04175.x.
  • [27] A.R. Muxworthy, D. Heslop and D.M. Michalk (2009). Thermal fluctuation fields in basalts. Earth Planets Space, 61, 111-117.
  • [25] Z. Gong, M.J. Dekkers, D. Heslop, T.A.T. Mullender (2009). End-member modelling of isothermal remanent magnetization (IRM) acquisition curves: a novel approach to diagnose remagnetization. Geophysical Journal International, 178(2), 693-701, doi:10.1111/j.1365-246X.2009.04220.x.
  • [25] A. C. Itambi, T. von Dobeneck, S. Mulitza, T. Bickert and D. Heslop (2009) Millennial-scale North West African droughts relates to H-Events and D-O cycles: Evidence from marine sediments from off-shore Senegal. Paleoceanography, 24, PA1205, doi:10.1029/2007/PA001570.
  • [24] C. Franke, Y. Fu, D. Heslop and T. von Dobeneck (2009). Data report: natural remanent magnetization of IODP Holes U1319A, U1320A, U1322B, and U1324B and magnetic carrier identification by scanning electron microscopy. In Flemings, P.B., Behrmann, J.H., John, C.M., and the Expedition 308 Scientists, Proc. IODP, 308: College Station, TX (Integrated Ocean Drilling Program Management International, Inc.). doi:10.2204/iodp.proc.308.209.2009.

2008

  • [23] P. D. Clift, K. V. Hodges, D. Heslop, R. Hannigan, H. V. Long and G. Calves (2008). Correlation of Himalayan exhumation rates and Asian monsoon intensity. Nature Geoscience, 1, 875-880, doi:10.1038/ngeo351.
  • [22] C.M. Köhler, D. Heslop, M.J. Dekkers, W. Krijgsman, .J.J. van Hinsbergen and T. von Dobeneck (2008). Tracking provenance change during the late Miocene in the Eastern Mediterranean using geochemical and environmental magnetic parameters. Geochemistry, Geophysics, Geosystems, 9, Q12018, doi:10.1029/2008GC002127.
  • [21] Y. Fu, T. von Dobeneck, C. Franke, D. Heslop and S. Kasten (2008). Rock magnetic identification and geochemical process models of greigite ormation in Quaternary marine sediments from the Gulf of Mexico (IODP Hole U1319A). Earth and Planetary Science Letters, 275(3-4), 233-245, doi:10.1016/j.epsl.2008.07.034.
  • [20] U. Proske, D. Heslop and T. J. J. Hanebuth (2008). Salt production in pre-Funan Vietnam: archaeomagnetic reorientation of briquetage fragments. Journal of Archaeological Science, 36, 84-89, doi:10.1016/j.jas.2008.07.012.

2007

  • [19] D. Heslop (2007). Are hydrodynamic shape effects important when modelling the formation of depositional remanent magnetization? Geophysical Journal International, 171, 1029-1035, doi:10.1111/j.1365-246X.2007.03588.x.
  • [18] D. Heslop (2007). A wavelet investigation of possible orbital influences on past geomagnetic field intensity. Geochemistry, Geophysics, Geosystems, 8, Q03003, doi:10.1029/2006GC001498.
  • [17] D. Heslop and M. Dillon (2007). Unmixing magnetic remanence curves without a priori knowledge. Geophysical Journal International, 170(2), 556-566, doi:10.1111/j.1365-246X.2007.03432.x.
  • [16] D. Heslop, von Dobeneck, T. and M. Höcker (2007). Using non-negative matrix factorization in the unmixing of diffuse reflectance spectra. Marine Geology, 241, 63-78, doi:10.1016/j.margeo.2007.03.004.

2006

  • [15] D. Heslop, A. Witt, T. Kleiner and K. Fabian (2006). The role of magnetostatic interactions in sediment suspensions. Geophysical Journal International, 165 (3), 775-785, doi:10.1111/j.1365-246X.2006.02951.x

2005

  • [14] D. Heslop (2005). A Monte Carlo investigation of the representation of thermally activated single-domain particles within the Day plot. Studia Geophysica Geodetica, 49, 163-176, doi:10.1007/s11200-005-0003-7.
  • [13] D. Heslop and A.R. Muxworthy (2005). Aspects of calculating First-Order Reversal Curve distributions. Journal of Magnetism and Magnetic Materials, 288, 155-167, doi:10.1016/j.jmmm.2004.09.002.
  • [12] A.R. Muxworthy, J. King, J. and D. Heslop (2005). Assessing the ability of First-order-reversal-curve (FORC) diagrams to unravel complex magnetic signals. Journal of Geophysical Research, 110 (B1), B01105, doi:10.1029/2004JB003195.

2004

  • [11] D. Heslop, G. McIntosh and M.J. Dekkers (2004). Using time- and temperature-dependent Preisach models to investigate the limitations of modelling isothermal remanent magnetization acquisition curves with cumulative log Gaussian functions. Geophysical Journal International, 157, 55-63, doi:10.1111/j.1365-246X.2004.02155.x.
  • [10] A.R. Muxworthy, D. Heslop and W. Williams (2004). Influence of magnetostatic interactions on First-Order Reversal Curve (FORC) diagrams: a micromagnetic approach. Geophysical Journal International, 158, 888-897, doi:10.1111/j.1365-246X.2004.02358.x.

2002

  • [9] D. Heslop and M.J. Dekkers (2002). Spectral analysis of unevenly spaced climatic time series using CLEAN: signal recovery and derivation of significance levels using a Monte Carlo simulation. Physics of the Earth and Planetary Interiors, 130, 103-116, doi:10.1016/S0031-9201(01)00310-7.
  • [8] D. Heslop, M.J. Dekkers, P.P. Kruiver and I.H.M. van Oorschot (2002). Analysis of isothermal remanent magnetisation acquisition curves using the expectation-maximisation algorithm. Geophysical Journal International, 148, 58-64, doi:10.1046/j.0956-540x.2001.01558.x.
  • [7] D. Heslop and M.J. Dekkers and C.G. Langereis (2002). Timing and structure of the Mid-Pleistocene Transition: records from the loess deposits of Northern China. Palaeogeography, Palaeoclimatology, Palaeoecology, 105, 133-143, doi:10.1016/S0031-0182(02)00282-1.

2001

  • [6] P.P. Kruiver, M.J. Dekkers and D. Heslop (2001). Quantification of magnetic coercivity components by the analysis of acquisition curves of isothermal remanent magnetisation. Earth and Planetary Science Letters, 189, 269-276, doi:10.1016/S0012-821X(01)00367-3.

2000

  • [5] D. Heslop, C.G. Langereis and M.J. Dekkers (2000). A new astronomical time scale for the loess deposits of Northern China. Earth and Planetary Science Letters, 184, 125-139, doi:10.1016/S0012-821X(00)00324-1.
  • [4] T.C. Partridge, A. Latham and D. Heslop (2000). Magnetostratigraphy of Makapansgat, Sterkfontein, Taung and Swartkrans. In: The Cenozoic of southern Africa, 126-129.
  • [3] T.C. Partridge, J. Shaw and D. Heslop (2000). Note on recent magnetostratigraphic analysis in Member 2 of the Sterkfontein formation. In: The Cenozoic of southern Africa, 129-130.

1999

  • [2] D. Heslop, J. Shaw, J. Bloemendal et al. (1999). Sub-Millennial scale variations in East Asian monsoon systems recorded by dust deposits from North-Western Chinese Loess Plateau. Physics and Chemistry of the Earth A, 24(9), 785-792, doi:10.1016/S1464-1895(99)00115-5.
  • [1] T.C. Partridge, J. Shaw, D. Heslop and R.J. Clarke (1999). The new hominid skeleton from Sterkfontein, South Africa: age and preliminary assessment. Journal of Quaternary Science, 14(4), 293-298, doi:10.1002/(SICI)1099-1417(199907)14:4<293::AID-JQS471>3.0.CO;2-X.

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