Geochemistry, Geophysics, Geosystems


  1. Regular Articles

    1. Top of page
    2. Regular Articles
    3. Research Article
    4. Research Articles
    5. Retraction
    6. Technical Brief
    7. Technical Reports: Methods
    1. You have full text access to this OnlineOpen article
      Critical single domain grain sizes in chains of interacting greigite particles: Implications for magnetosome crystals (pages 5430–5441)

      Adrian R. Muxworthy, Wyn Williams, Andrew P. Roberts, Michael Winklhofer, Liao Chang and Mihály Pósfai

      Version of Record online: 27 DEC 2013 | DOI: 10.1002/2013GC004973

      Key Points

      • Critical single-domain grain sizes for greigite determined
      • Grain stability range for magnetotaxis calculated for greigite
      • All observed greigite magnetosomes found to be single domain
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      Thermal evolution of the North Atlantic lithosphere: New constraints from magnetic anomaly inversion with a fractal magnetization model (pages 5078–5105)

      Chun-Feng Li, Jian Wang, Jian Lin and Tingting Wang

      Version of Record online: 11 DEC 2013 | DOI: 10.1002/2013GC004896

      Key Points

      • Methods for Curie depth estimation attested theoretically and numerically
      • North Atlantic Curie depths increase but undulate with crustal age
      • Small-scale convection and uppermost mantle serpentinization detected
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      The origin of magnetic remanence in stalagmites: Observations from electron microscopy and rock magnetism (pages 5006–5025)

      B. E. Strauss, J. H. Strehlau, I. Lascu, J. A. Dorale, R. L. Penn and J. M. Feinberg

      Version of Record online: 6 DEC 2013 | DOI: 10.1002/2013GC004950

      Key Points

      • Magnetic minerals suggest that speleothem remanence falls on a CRM-DRM continuum
      • Observed goethite suggests CRM; magnetite and titanomagnetite indicate DRM
      • Paleomagnetic studies on speleothems should analyze only DRM components
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      The influence of high-latitude flux lobes on the Holocene paleomagnetic record of IODP Site U1305 and the northern North Atlantic (pages 4623–4646)

      Joseph S. Stoner, James E. T. Channell, Alain Mazaud, Sarah E. Strano and Chuang Xuan

      Version of Record online: 18 OCT 2013 | DOI: 10.1002/ggge.20272

      Key Points

      • Deep-sea sediments provide insights into geomagnetic change
      • North Atlantic is characterized by high amplitude PSV
      • PSV results from temporal oscillations of flux at a few recurrent locations
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      Evidence for weak ferromagnetic moment within the basal plane of hematite natural crystals at low temperature (pages 4444–4457)

      Fatima Martin-Hernandez and Ann M. Hirt

      Version of Record online: 4 OCT 2013 | DOI: 10.1002/ggge.20245

      Key Points

      • A weak ferromagnetic (WFM) moment is detected below the Morin transition
      • The WFM lies within the basal plane
      • Natural Hematite is not a pure AF below TM
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      A strong angular dependence of magnetic properties of magnetosome chains: Implications for rock magnetism and paleomagnetism (pages 3887–3907)

      Jinhua Li, Kunpeng Ge, Yongxin Pan, Wyn Williams, Qingsong Liu and Huafeng Qin

      Version of Record online: 1 OCT 2013 | DOI: 10.1002/ggge.20228

      Key Points

      • Magnetic anisotropy of magnetosome chains is important to bio- and geosciences
      • This study studied such anisotropy and its magnetic effects
      • Results give new insights into rock magnetism and paleomagnetism
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      Paleointensity results from the late-Archaean Modipe Gabbro of Botswana (pages 2198–2205)

      A. R. Muxworthy, M. E. Evans, S. J. Scourfield and J. G. King

      Version of Record online: 19 JUL 2013 | DOI: 10.1002/ggge.20142

      Key Points

      • New Thellier paleointensity estimate for the Modipe Gabbro, late-Archaean
      • Application of new cooling-rate correction protocol
      • Very robust paleointensity estimate addition to the database
    8. You have full text access to this OnlineOpen article
      Comparison and calibration of nonheating paleointensity methods: A case study using dusty olivine (pages 2143–2158)

      Sophie-Charlotte L. L. Lappe, Joshua M. Feinberg, Adrian Muxworthy and Richard J. Harrison

      Version of Record online: 10 JUL 2013 | DOI: 10.1002/ggge.20141

      Key Points

      • We present a review and calibration of non-heating paleointensity protocols
      • The recommended method of paleointensity determination is ARM normalization
      • The FORC method works well for SD states but fails for SV states
  2. Research Article

    1. Top of page
    2. Regular Articles
    3. Research Article
    4. Research Articles
    5. Retraction
    6. Technical Brief
    7. Technical Reports: Methods
    1. You have full text access to this OnlineOpen article
      Effect of maghemization on the magnetic properties of nonstoichiometric pseudo-single-domain magnetite particles (pages 2969–2979)

      Trevor P. Almeida, Adrian R. Muxworthy, Takeshi Kasama, Wyn Williams, Christian Damsgaard, Cathrine Frandsen, Timothy J. Pennycook and Rafal E. Dunin-Borkowski

      Version of Record online: 12 SEP 2015 | DOI: 10.1002/2015GC005858

      Key Points:

      • Maghemization of Fe3O4 grains is confirmed through XRD, Mossbauer, and EELS
      • Maghemization of Fe3O4 grains occurs through formation of a core-shell structure
      • Magnetic behavior is considered due to core-shell exchange coupling
  3. Research Articles

    1. Top of page
    2. Regular Articles
    3. Research Article
    4. Research Articles
    5. Retraction
    6. Technical Brief
    7. Technical Reports: Methods
    1. Mid-Brunhes magnetic excursions in marine isotope stages 9, 13, 14, and 15 (286, 495, 540, and 590 ka) at North Atlantic IODP Sites U1302/3, U1305, and U1306 (pages 473–487)

      J. E. T. Channell

      Version of Record online: 1 FEB 2017 | DOI: 10.1002/2016GC006626

      Key Points

      • Directional magnetic excursions recorded in the North Atlantic in marine isotope stages 9, 13, 14, and 15 at 286, 495, 540, and 590 ka
      • The mid-Brunhes directional magnetic excursions likely have millennial or centennial duration
      • Rare recording of these magnetic excursions is attributed to brevity of excursions and filtering through process of remanence acquisition
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      Effects of titanomagnetite reordering processes on thermal demagnetization and paleointensity experiments (pages 4848–4858)

      Julie A. Bowles and Mike J. Jackson

      Version of Record online: 17 DEC 2016 | DOI: 10.1002/2016GC006607

      Key Points

      • Inferred cation reordering in titanomagnetite can affect paleomagnetic interpretations
      • Cation reordering in titanomagnetite makes it impossible to accurately measure the unblocking temperature spectrum without modifying it
      • Inferred cation reordering in titanomagnetite can result in apparent pTRM-check failure in paleointensity experiments
    3. The effects of 10 to >160 GPa shock on the magnetic properties of basalt and diabase (pages 4753–4771)

      N. S. Bezaeva, N. L. Swanson-Hysell, S. M. Tikoo, D. D. Badyukov, M. Kars, R. Egli, D. A. Chareev, L. M. Fairchild, E. Khakhalova, B. E. Strauss and A. K. Lindquist

      Version of Record online: 24 NOV 2016 | DOI: 10.1002/2016GC006583

      Key Points

      • Spherical shock experiments result in a range of pressures across a single sample
      • We observed and characterized shock-induced and temperature-induced magnetic hardening
      • The described effects likely occur in target rocks during large impacts on terrestrial bodies
    4. Physical interpretation of isothermal remanent magnetization end-members: New insights into the environmental history of Lake Hovsgul, Mongolia (pages 4669–4683)

      Karl Fabian, Valeriy P. Shcherbakov, Lina Kosareva and Danis Nourgaliev

      Version of Record online: 21 NOV 2016 | DOI: 10.1002/2016GC006506

      Key Points

      • New physical interpretation method of isothermal remanent magnetization end-member analysis
      • End-members in Lake Hovsgul are terrigenous influx, magnetite magnetosomes, and biotic/abiotic greigite
      • Downcore variation reflects climatic history via anoxic/suboxic sediment conditions
    5. Holocene glacial activity in Barilari Bay, west Antarctic Peninsula, tracked by magnetic mineral assemblages: Linking ice, ocean, and atmosphere (pages 4553–4565)

      Brendan T. Reilly, Carl J. Natter Jr. and Stefanie A. Brachfeld

      Version of Record online: 16 NOV 2016 | DOI: 10.1002/2016GC006627

      Key Points

      • Western Antarctic Peninsula detrital magnetic mineral assemblages are studied as tracers of lithogenic sediments
      • Distinct magnetic signatures of sedimentary facies exist for sea ice, subice shelf, and grounding-line environments
      • Magnetic mineral provenance, within sedimentologic context, provide insight to late Holocene glacial activity
    6. Recognizing magnetostratigraphy in overprinted and altered marine sediments: Challenges and solutions from IODP Site U1437 (pages 3190–3206)

      Robert J. Musgrave and Myriam Kars

      Version of Record online: 10 AUG 2016 | DOI: 10.1002/2016GC006386

      Key Points

      • Site U1437 illustrates techniques for recognizing magnetostratigraphy in altered and overprinted sediments
      • Magnetic sulfide authigenesis produces both normal and reversed polarity artefacts
      • Low temperature demagnetization is effective in removing overprints from MD-dominated samples
    7. Shock-induced deformation phenomena in magnetite and their consequences on magnetic properties (pages 2374–2393)

      Boris Reznik, Agnes Kontny, Jörg Fritz and Uta Gerhards

      Version of Record online: 24 JUN 2016 | DOI: 10.1002/2016GC006338

      Key Points

      • The effect of shock waves on microstructure and magnetic properties of magnetite is studied
      • Our results unravel the microstructural mechanisms behind the loss of magnetization and the modification of magnetic properties
      • Our approach can be applied for studies aiming to understand the shock-induced magnetic phenomena in rocks on earth and in meteorites
    8. Magnetic record of deglaciation using FORC-PCA, sortable-silt grain size, and magnetic excursion at 26 ka, from the Rockall Trough (NE Atlantic) (pages 1823–1841)

      J. E. T. Channell, R. J. Harrison, I. Lascu, I. N. McCave, F. D. Hibbert and W. E. N. Austin

      Version of Record online: 27 MAY 2016 | DOI: 10.1002/2016GC006300

      Key Points

      • FORC-PCA as a new magnetic grain-size discriminator
      • Relationship of magnetic and sortable-silt grain size proxies over Termination I
      • New putative magnetic excursion at 26.5 ka
    9. Importance of titanohematite in detrital remanent magnetizations of strata spanning the Cretaceous-Paleogene boundary, Hell Creek region, Montana (pages 660–678)

      Courtney J. Sprain, Joshua M. Feinberg, Paul R. Renne and Mike Jackson

      Version of Record online: 7 MAR 2016 | DOI: 10.1002/2015GC006191

      Key Points:

      • Intermediate titanohematite (TH) carries significant remanence in KPg sediments, Hell Creek, MT
      • A new self-reversal test provides a unique identifier of TH while quantifying its remanence
      • Magnetic similarities between our study and clastics within other Laramide basins imply TH more abundant than thought
    10. Magnetic properties of sediments of the Red River: Effect of sorting on the source-to-sink pathway and its implications for environmental reconstruction (pages 270–281)

      Thi Thu Hien Nguyen, Weiguo Zhang, Zhen Li, Jie Li, Can Ge, Jinyan Liu, Xuexin Bai, Huan Feng and Lizhong Yu

      Version of Record online: 2 FEB 2016 | DOI: 10.1002/2015GC006089

      Key Points:

      • Magnetic properties of sediments on the source to sink pathway of the Red River are studied
      • Magnetic grain-size and mineralogy indicators are sensitive to sediment sorting
      • Magnetic proxies of environmental change are more reliable when used with geochemical indicators
    11. A 1400 year environmental magnetic record from varved sediments of Lake Xiaolongwan (Northeast China) reflecting natural and anthropogenic soil erosion (pages 3053–3060)

      Youliang Su, Guoqiang Chu, Qingsong Liu, Zhaoxia Jiang, Xing Gao and Torsten Haberzettl

      Version of Record online: 13 SEP 2015 | DOI: 10.1002/2015GC005880

      Key Points:

      • Superparamagnetic magnetite in the sediments can be attributed to pedogenic soils
      • Intensity of Human Impact in Northeastern China increases sharply at AD 1500
    12. Magnetic unmixing of first-order reversal curve diagrams using principal component analysis (pages 2900–2915)

      Ioan Lascu, Richard J. Harrison, Yuting Li, Joy R. Muraszko, James E. T. Channell, Alexander M. Piotrowski and David A. Hodell

      Version of Record online: 5 SEP 2015 | DOI: 10.1002/2015GC005909

      Key Points:

      • FORC diagrams are powerful for unmixing magnetic domain states
      • PCA represents FORC data according to natural variability in data sets
      • Samples are recast as linear combinations of end-member FORCs in PCA space
    13. A protocol for variable-resolution first-order reversal curve measurements (pages 1364–1377)

      Xiang Zhao, David Heslop and Andrew P. Roberts

      Version of Record online: 9 MAY 2015 | DOI: 10.1002/2014GC005680

      Key Points:

      • A variable-resolution FORC measurement protocol has been developed
      • The irregular FORC protocol efficiently captures fine-scale features
      • Free measurement and processing software are provided
    14. Occurrence of greigite in the Pliocene sediments of Lake Qinghai, China, and its paleoenvironmental and paleomagnetic implications (pages 1293–1306)

      Chaofeng Fu, Jan Bloemendal, Xiaoke Qiang, Mimi J. Hill and Zhisheng An

      Version of Record online: 8 MAY 2015 | DOI: 10.1002/2014GC005677

      Key Points:

      • Identified the carrier of magnetic susceptibility peaks
      • Greigite formed in a warm and humid climate
      • Lacustrine greigite stable on a time scale of millions of year
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      Natural remanent magnetization acquisition in bioturbated sediment: General theory and implications for relative paleointensity reconstructions (pages 995–1016)

      R. Egli and X. Zhao

      Version of Record online: 2 APR 2015 | DOI: 10.1002/2014GC005672

      Key Points:

      • A natural magnetization is acquired in the mixed layer of bioturbated sediment
      • The acquisition efficiency depends on the intensity of mixing
      • Relative paleointensity artifacts depend on variable acquisition efficiencies
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      Authigenesis of magnetic minerals in gas hydrate-bearing sediments in the Nankai Trough, offshore Japan (pages 947–961)

      Myriam Kars and Kazuto Kodama

      Version of Record online: 27 MAR 2015 | DOI: 10.1002/2014GC005614

      Key Points:

      • Changes in magnetic properties related to gas hydrate
      • Six gas hydrate horizons may be recognized by rock magnetism
      • Rock magnetism counterbalances low resolution of pore water analysis
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      Full vector low-temperature magnetic measurements of geologic materials (pages 301–314)

      Joshua M. Feinberg, Peter A. Solheid, Nicholas L. Swanson-Hysell, Mike J. Jackson and Julie A. Bowles

      Version of Record online: 31 JAN 2015 | DOI: 10.1002/2014GC005591

      Key Points:

      • New low-temperature magnetic instrument
      • Full vector records across magnetic transitions
      • Applications to paleomagnetic studies
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      Decadal-scale variations in geomagnetic field intensity from ancient Cypriot slag mounds (pages 195–214)

      Ron Shaar, Lisa Tauxe, Erez Ben-Yosef, Vasiliki Kassianidou, Brita Lorentzen, Joshua M. Feinberg and Thomas E. Levy

      Version of Record online: 22 JAN 2015 | DOI: 10.1002/2014GC005455

      Key Points:

      • Decadal-scale resolution paleointensity data from ancient slag mounds in Cyprus
      • High paleointensity rate of change during the fifth century CE
      • Levant and South Africa may be longitudinally paired active areas
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      Rock magnetism of tiny exsolved magnetite in plagioclase from a Paleoarchean granitoid in the Pilbara craton (pages 112–125)

      Yoichi Usui, Takazo Shibuya, Yusuke Sawaki and Tsuyoshi Komiya

      Version of Record online: 20 JAN 2015 | DOI: 10.1002/2014GC005508

      Key Points:

      • First Paleoarchean plagioclase-hosted exsolved magnetites in a granitoid
      • Exsolved magnetites exhibit high magnetic stability
      • Exsolved magnetites exhibit minimal magnetic interactions
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      Bulk particle size distribution and magnetic properties of particle-sized fractions from loess and paleosol samples in Central Asia (pages 101–111)

      Jinbo Zan, Xiaomin Fang, Shengli Yang and Maodu Yan

      Version of Record online: 15 JAN 2015 | DOI: 10.1002/2014GC005616

      Key Points:

      • Particle size distributions of the loess and paleosol samples in Central Asia
      • Magnetic grain size and origin of magnetic minerals in the Central Asian loess
      • Particle size contributions to bulk magnetic properties
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      FORCulator: A micromagnetic tool for simulating first-order reversal curve diagrams (pages 4671–4691)

      Richard J. Harrison and Ioan Lascu

      Version of Record online: 5 DEC 2014 | DOI: 10.1002/2014GC005582

      Key Points:

      • FORC simulations performed for strongly interacting SD particles
      • FORC signatures found for clusters and chains
      • Presence and degree of bacterial chain collapse quantified
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      Curie temperatures of titanomagnetite in ignimbrites: Effects of emplacement temperatures, cooling rates, exsolution, and cation ordering (pages 4343–4368)

      Mike Jackson and Julie A. Bowles

      Version of Record online: 25 NOV 2014 | DOI: 10.1002/2014GC005527

      Key Points

      • Titanomagnetite Curie temperatures are strongly dependent on thermal history
      • Observations suggest time and temperature-dependent cation ordering
      • This has important implications in paleomagnetism and geospeedometry
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      Deconvolution of continuous paleomagnetic data from pass-through magnetometer: A new algorithm to restore geomagnetic and environmental information based on realistic optimization (pages 3907–3924)

      Hirokuni Oda and Chuang Xuan

      Version of Record online: 21 OCT 2014 | DOI: 10.1002/2014GC005513

      Key Points

      • Magnetometer sensor response is estimated reliably using a magnetic point source
      • Magnetometer measurement noise is characterized by repeated data of a u-channel
      • We show new deconvolution algorithm considering realistic measurement conditions
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      Identification and environmental interpretation of diagenetic and biogenic greigite in sediments: A lesson from the Messinian Black Sea (pages 3612–3627)

      Liao Chang, Iuliana Vasiliev, Christiaan van Baak, Wout Krijgsman, Mark J. Dekkers, Andrew P. Roberts, John D. Fitz Gerald, Annelies van Hoesel and Michael Winklhofer

      Version of Record online: 12 SEP 2014 | DOI: 10.1002/2014GC005411

      Key Points

      • We provide evidence for the presence of biogenic greigite in ancient sediments
      • Diagenetic greigite enhancements are climatically controlled
      • Greigite is a paleoenvironmental indicator in anoxic environments
    25. You have free access to this content
      Anisotropy of magnetic susceptibility in natural olivine single crystals (pages 3051–3065)

      Andrea R. Biedermann, Thomas Pettke, Eric Reusser and Ann M. Hirt

      Version of Record online: 31 JUL 2014 | DOI: 10.1002/2014GC005386

      Key Points

      • The maximum susceptibility in fresh olivine with >3wt % FeO is parallel to c
      • At RT the minimum susceptibility lies along a or b depending on the Fe content
      • At 77 K the minimum susceptibility is parallel to the crystal's b axis
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      Ferro and antiferromagnetism of ultrafine-grained hematite (pages 2699–2712)

      Zhaoxia Jiang, Qingsong Liu, Mark J. Dekkers, Claudio Colombo, Yongjae Yu, Vidal Barrón and José Torrent

      Version of Record online: 30 JUN 2014 | DOI: 10.1002/2014GC005377

      Key Points

      • Ferro and antiferromagnetic properties of Al-hematite were investigated
      • The SP/SD threshold of Al-hematite is around 17 nm at room temperature
      • Xanti and Ms of hematite are negatively correlated with T and particle size
    27. You have full text access to this OnlineOpen article
      Paleomagnetic recording fidelity of nonideal magnetic systems (pages 2254–2261)

      Adrian R. Muxworthy, David Krása, Wyn Williams and Trevor P. Almeida

      Version of Record online: 5 JUN 2014 | DOI: 10.1002/2014GC005249

      Key Points

      • Nonideal magnetic systems accurately record field direction
      • Weak-field remanences more stable than strong-field remanences
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      Characterizing magnetofossils from first-order reversal curve (FORC) central ridge signatures (pages 2170–2179)

      David Heslop, Andrew P. Roberts and Liao Chang

      Version of Record online: 4 JUN 2014 | DOI: 10.1002/2014GC005291

      Key Points

      • First-order reversal curve central ridges carry magnetofossil information
      • Central ridge form varies within and between different sediment sequences
      • Central ridge magnetofossil characterization provides environmental information
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      Effects of the core-shell structure on the magnetic properties of partially oxidized magnetite grains: Experimental and micromagnetic investigations (pages 2021–2038)

      Kunpeng Ge, Wyn Williams, Qingsong Liu and Yongjae Yu

      Version of Record online: 30 MAY 2014 | DOI: 10.1002/2014GC005265

      Key Points

      • The low-temperature oxidation is very common in natural environments
      • Experiments and micromagnetic modeling are studied
      • The partially oxidized magnetite can record palaeomagnetic signals
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      Confirmation of progressive plate motion during the Midcontinent Rift's early magmatic stage from the Osler Volcanic Group, Ontario, Canada (pages 2039–2047)

      Nicholas L. Swanson-Hysell, Angus A. Vaughan, Monica R. Mustain and Kristofer E. Asp

      Version of Record online: 30 MAY 2014 | DOI: 10.1002/2013GC005180

      Key Points

      • Paleomagnetic data reveal progressive directional change through the Osler Group
      • Rapid plate motion was ongoing during the early magmatic stage of rifting
      • Plume activity was ongoing in Laurentia and elsewhere
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      An investigation of the magnetic carriers and demagnetization characteristics of the Gulang loess section, northwestern Chinese Loess Plateau (pages 1600–1616)

      Ting Chen, Xiaoke Qiang, Hui Zhao and Youbin Sun

      Version of Record online: 30 APR 2014 | DOI: 10.1002/2014GC005268

      Key Points

      • Effect of thermal demagnetization tails of VRM can affect paleomagenetic results
      • Both coarse-grained magnetite and hematite contribute to NRM
      • Careful choose of demagnetization method for coarse-grained loess deposits
    32. You have free access to this content
      On the magnetocrystalline anisotropy of greigite (Fe3S4) (pages 1558–1579)

      Michael Winklhofer, Liao Chang and Stephan H. K. Eder

      Version of Record online: 30 APR 2014 | DOI: 10.1002/2013GC005121

      Key Points

      • We used ferromagnetic resonance to constrain magnetic anisotropy parameters for greigite
      • We predict rockmagnetic magnetic properties of single domain greigite.
      • We critically review former lines of evidence for a <100> easy axis orientation
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      On improving the selection of Thellier-type paleointensity data (pages 1180–1192)

      Greig A. Paterson, Lisa Tauxe, Andrew J. Biggin, Ron Shaar and Lori C. Jonestrask

      Version of Record online: 22 APR 2014 | DOI: 10.1002/2013GC005135

      Key Points

      • Standard definitions for paleointensity statistics are proposed
      • A large paleointensity meta-analysis is conducted to investigate data selection
      • Modifications based on SD predictions improve the effectiveness of selection
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      Geomagnetic field intensity determination from Pleistocene trachytic lava flows in Jeju Geopark (pages 516–529)

      Doohee Jeong, Yongjae Yu, Qingsong Liu, Zhaoxia Jiang, Gi Won Koh and Dong-Chan Koh

      Version of Record online: 1 MAR 2014 | DOI: 10.1002/2013GC005028

      Key Points

      • A composite of 28 trachytic lava flows were recovered in Jeju Geopark
      • Brecciated margin and vesicle streaked zone contains fine-grained Fe-oxide
      • High strength geomagnetic field intensity appears at ~325-350 ka
    35. You have free access to this content
      Magnetotaxis and acquisition of detrital remanent magnetization by magnetotactic bacteria in natural sediment: First experimental results and theory (pages 255–283)

      Xuegang Mao, Ramon Egli, Nikolai Petersen, Marianne Hanzlik and Xiangyu Zhao

      Version of Record online: 31 JAN 2014 | DOI: 10.1002/2013GC005034

      Key Points

      • Magnetotactic bacteria in sediment are poorly aligned with the geomagnetic field
      • Magnetofossils acquire a natural remanent magnetization inside the mixed layer
      • Magnetofossil NRM is suited for relative paleointensity determination
    36. You have full text access to this OnlineOpen article
      Magnetic characterization of synthetic titanomagnetites: Quantifying the recording fidelity of ideal synthetic analogs (pages 161–175)

      Trevor P. Almeida, Adrian R. Muxworthy, Wyn Williams, Takeshi Kasama and Rafal Dunin-Borkowski

      Version of Record online: 27 JAN 2014 | DOI: 10.1002/2013GC005047

      Key Points

      • Synthetic titanomagnetites of varied size and Ti content have been produced
      • TEM technique of off-axis electron holography imaged their magnetic behavior
      • Reaction products are thought ideal for the purpose of studying natural systems
  4. Retraction

    1. Top of page
    2. Regular Articles
    3. Research Article
    4. Research Articles
    5. Retraction
    6. Technical Brief
    7. Technical Reports: Methods
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      WITHDRAWN: An Evaluation of Modern Pottery from Southern Africa as a Magnetic Recorder (pages 1–26)

      Levi P. Neukirch, John A. Tarduno, Rory D. Cottrell, Michael K. Watkeys and Thomas N. Huffman

      Version of Record online: 25 OCT 2013 | DOI: 10.1029/2011GC003955

  5. Technical Brief

    1. Top of page
    2. Regular Articles
    3. Research Article
    4. Research Articles
    5. Retraction
    6. Technical Brief
    7. Technical Reports: Methods
    1. You have free access to this content
      A magnetic disturbance index for Mercury's magnetic field derived from MESSENGER Magnetometer data (pages 3875–3886)

      Brian J. Anderson, Catherine L. Johnson and Haje Korth

      Version of Record online: 23 SEP 2013 | DOI: 10.1002/ggge.20242

      Key Points

      • Dynamics of Mercury's magnetosphere is reflected in magnetic variability
      • Three period bands are used to quantify the disturbance level
      • Normalization is used to account for structure of fluctuation field at Mercury
  6. Technical Reports: Methods

    1. Top of page
    2. Regular Articles
    3. Research Article
    4. Research Articles
    5. Retraction
    6. Technical Brief
    7. Technical Reports: Methods
    1. You have full text access to this OnlineOpen article
      PmagPy: Software package for paleomagnetic data analysis and a bridge to the Magnetics Information Consortium (MagIC) Database (pages 2450–2463)

      L. Tauxe, R. Shaar, L. Jonestrask, N. L. Swanson-Hysell, R. Minnett, A. A. P. Koppers, C. G. Constable, N. Jarboe, K. Gaastra and L. Fairchild

      Version of Record online: 2 JUN 2016 | DOI: 10.1002/2016GC006307

      Key Points

      • PmagPy software provides an interface to interact with Magnetics Information Consortium (MagIC) data
      • PmagPy has tools to support visualization and interpretation across a range of rock and paleomagnetic data types
      • Novices as well as experienced programmers can use PmagPy for data analysis and MagIC database preparation
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      Magnetic anisotropy, magnetostatic interactions and identification of magnetofossils

      Jinhua Li, Wenfang Wu, Qingsong Liu and Yongxin Pan

      Version of Record online: 6 DEC 2012 | DOI: 10.1029/2012GC004384

      Key Points

      • Detection of magnetofossils is challenging due to magnetosome chain collapse
      • Rock magnetic methods are sensitive to chain breakup and/or particle clumping
      • The delta plot can be used to detect unoxidized magnetofossils
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      Late Quaternary chronostratigraphic framework of deep Baffin Bay glaciomarine sediments from high-resolution paleomagnetic data

      Quentin Simon, Guillaume St-Onge and Claude Hillaire-Marcel

      Version of Record online: 7 NOV 2012 | DOI: 10.1029/2012GC004272

      Key Points

      • A late Quaternary stratigraphy is derived for central Baffin Bay
      • Relative paleointensity and 2 excursions support the chronostratigraphy
      • Sedimentation rates vary from 3 up to 20 cm/ka during the last glacial cycle
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      Rock magnetism in loess from the middle Tian Shan: Implications for paleoenvironmental interpretations of magnetic properties of loess deposits in Central Asia

      Jinbo Zan, Xiaomin Fang, Junsheng Nie, Xiaohua Teng and Shengli Yang

      Version of Record online: 30 OCT 2012 | DOI: 10.1029/2012GC004251

      Key Points

      • Multiparameter rock magnetic records of loess deposit in central Asia
      • Eolian ferrimagnetic minerals dominate magnetic properties of Tian Shan loess
      • An intensified aridification of Central Asia occurred in the mid-Pleistocene
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      Multiproxy characterization and budgeting of terrigenous end-members at the NW African continental margin

      Janna Just, David Heslop, Tilo von Dobeneck, Torsten Bickert, Mark J. Dekkers, Thomas Frederichs, Inka Meyer and Matthias Zabel

      Version of Record online: 29 SEP 2012 | DOI: 10.1029/2012GC004148

      Key Points

      • Novel approach to find volume calibrated magnetic and geochemical properties
      • Multiproxy properties enable discrimination of fluvial and aeolian sources
      • Dust accumulation during Heinrich Stadial 1 was 80 times higher than today
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      Signatures and significance of aeolian, fluvial, bacterial and diagenetic magnetic mineral fractions in Late Quaternary marine sediments off Gambia, NW Africa

      Janna Just, Mark J. Dekkers, Tilo von Dobeneck, Annelies van Hoesel and Torsten Bickert

      Version of Record online: 29 SEP 2012 | DOI: 10.1029/2012GC004146

      Key Points

      • Quantification of bacterial magnetite and diagenesis marine sediments
      • Hematite/goethite ratio is characteristic for fluvial and aeolian end-members
      • Heinrich Stadial 1 has the highest relative abundance of the aeolian end-member
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      Magnetism of outdoor and indoor settled dust and its utilization as a tool for revealing the effect of elevated particulate air pollution on cardiovascular mortality

      Diana Jordanova, Neli Jordanova, Philippe Lanos, Petar Petrov and Tsenka Tsacheva

      Version of Record online: 25 AUG 2012 | DOI: 10.1029/2012GC004160

      Key Points

      • Higher susceptibility and loading rate of outdoor compared to indoor dust obtained
      • Linear correlation found between PAH content and magnetic grain size proxies
      • Xindoor/Xoutdoor correlates with mortality caused by cardiovascular diseases
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      Continuous production of nanosized magnetite through low grade burial

      Myriam Kars, Charles Aubourg, Jean-Pierre Pozzi and Dominik Janots

      Version of Record online: 10 AUG 2012 | DOI: 10.1029/2012GC004104

      Key Points

      • Magnetic experiments to track the formation of trace magnetic minerals
      • Production of nanoparticles of magnetite from 50 to 130{degree}C
      • Partial to complete remagnetization of sedimentary rocks
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      Pyrrhotite as a tracer for denudation of the Taiwan orogen

      Chorng-Shern Horng, Chih-An Huh, Kuo-Hang Chen, Chun-Hung Lin, Kai-Shuan Shea and Kan-Hsi Hsiung

      Version of Record online: 3 AUG 2012 | DOI: 10.1029/2012GC004195

      Key Points

      • Pyrrhotite is widely distributed in low-grade metamorphic terranes in Taiwan
      • Pyrrhotite is a potential tracer for studying surface processes of orogens
      • Pyrrhotite can be used to unravel the early denudation history of orogens
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      Rapid surficial oxidation of synthetic Fe-Ti oxides at high temperature: Observations and consequences for magnetic measurements

      Dominique Lattard, Ursula Sauerzapf and Agnes Kontny

      Version of Record online: 3 AUG 2012 | DOI: 10.1029/2012GC004152

      Key Points

      • The surface of Fe-Ti oxides oxidizes within seconds in air above 700 degrees C
      • Surface oxidation of Fe-Ti oxides produces oxyexsolutions
      • Surface oxidation is revealed by T-dependent magnetic susceptibility curves
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      PuffinPlot: A versatile, user-friendly program for paleomagnetic analysis

      P. C. Lurcock and G. S. Wilson

      Version of Record online: 26 JUN 2012 | DOI: 10.1029/2012GC004098

      Key Points

      • PuffinPlot is a new program for paleomagnetic data display and analysis
      • PuffinPlot has graphical interactive, batch, and script operation modes
      • PuffinPlot produces publication-quality vector graphical output
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      X-ray magnetic circular dichroïsm provides strong evidence for tetrahedral iron in ferrihydrite

      Yohan Guyodo, Philippe Sainctavit, Marie-Anne Arrio, Claire Carvallo, R. Lee Penn, Jasmine J. Erbs, Brady S. Forsberg, Guillaume Morin, Fabien Maillot, France Lagroix, Pierre Bonville, Fabrice Wilhelm and Andrei Rogalev

      Version of Record online: 7 JUN 2012 | DOI: 10.1029/2012GC004182

      Key Points

      • Significant tetrahedral Fe(III) in the structure of ferrihydrite shown by XMCD
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      Towards the robust selection of Thellier-type paleointensity data: The influence of experimental noise

      Greig A. Paterson, Andrew J. Biggin, Yuhji Yamamoto and Yongxin Pan

      Version of Record online: 2 JUN 2012 | DOI: 10.1029/2012GC004046

      Key Points

      • The effects of experimental noise on paleointensity data are investigated
      • Limits on our ability to detect non-ideal behavior are defined
      • We highlight parameters sensitive to noise and recommend a minimum fraction
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      The low-temperature magnetic signature of Fe-rich serpentine in CM2 chondrites: Comparison with terrestrial cronstedtite and evolution with the degree of alteration

      Agnès Elmaleh, Serena Chiara Tarantino, Michele Zema, Bertrand Devouard and Michel Fialin

      Version of Record online: 19 MAY 2012 | DOI: 10.1029/2011GC003964

      Key Points

      • Evidence for glassy magnetic behavior in the Fe-rich serpentine cronstedtite
      • Comparison between the magnetic signatures of cronstedtite and CM2 chondrites
      • Evolution of the low-T magnetic properties of CM2 chondrites with alteration
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      Ferromagnetic resonance characterization of greigite (Fe3S4), monoclinic pyrrhotite (Fe7S8), and non-interacting titanomagnetite (Fe3-xTixO4)

      Liao Chang, Michael Winklhofer, Andrew P. Roberts, Mark J. Dekkers, Chorng-Shern Horng, Lei Hu and Qianwang Chen

      Version of Record online: 19 MAY 2012 | DOI: 10.1029/2012GC004063

      Key Points

      • The FMR spectra of a range of magnetic minerals were measured and modeled
      • There are large overlaps in FMR signatures of different magnetic minerals
      • Intact magnetosomes are a unique system with distinct FMR signatures
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      Estimation of significance levels and confidence intervals for first-order reversal curve distributions

      David Heslop and Andrew P. Roberts

      Version of Record online: 18 MAY 2012 | DOI: 10.1029/2012GC004115

      Key Points

      • FORC processing algorithms are extended to include error analysis
      • Significance levels can be mapped for FORC distributions
      • Confidence intervals can be estimated for profiles through FORC distributions
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      A detailed paleomagnetic record between 2.1 and 2.75 Ma at IODP Site U1314 in the North Atlantic: Geomagnetic excursions and the Gauss-Matuyama transition

      Masao Ohno, Tatsuya Hayashi, Fumiki Komatsu, Fumi Murakami, Meng Zhao, Yohan Guyodo, Gary Acton, Helen F. Evans and Toshiya Kanamatsu

      Version of Record online: 12 MAY 2012 | DOI: 10.1029/2012GC004080

      Key Points

      • Paleomagnetic record between 2.1 and 2.75 Ma in the North Atlantic
      • Geomagnetic excursions in the Matuyama and the Gauss Chron
      • Gauss-Matuyama polarity transition falls within Marine Isotope Stage 103
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      The SushiBar: An automated system for paleomagnetic investigations

      Michael R. Wack and Stuart A. Gilder

      Version of Record online: 6 MAR 2012 | DOI: 10.1029/2011GC003985

      Key Points

      • New automated system for paleomagnetic investigations
      • Anisotropy of anhysteretic remanence
      • Viscosity of anhysteretic remanence
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      High-resolution paleomagnetic records from Laguna Potrok Aike (Patagonia, Argentina) for the last 16,000 years

      Claudia S. G. Gogorza, María A. Irurzun, Ana M. Sinito, Agathe Lisé-Pronovost, Guillaume St-Onge, Torsten Haberzettl, Christian Ohlendorf, Stephanie Kastner and Bernd Zolitschka

      Version of Record online: 16 FEB 2012 | DOI: 10.1029/2011GC003900

      Key Points

      • High-resolution paleomagnetic records
      • Laguna Potrok Aike (Patagonia, Argentina)
      • Holocene and Late-glacial records

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