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  • 1
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    Geomagnetic Field Variations in the Past : New Data, Applications and Recent Advances (2020)
    London : The Geological Society
    Details
    Keywords: palaeomagnetism; palaeomagnetic studies; rock magnetic studies; geomagnetic field; Earth's magnetic field
    Description / Table of Contents: Geomagnetic field variations in the past: an introduction / Anita Di Chiara, Emilio Herrero-Bervera and Evdokia Tema / Geological Society, London, Special Publications, 497, 1-8, 27 July 2020, https://doi.org/10.1144/SP497-2020-78 --- Rock-magnetic and archaeomagnetic investigations on archaeological artefacts from Maharashtra, India / K. Deenadayalan, P. B. Gawali, B. V. Lakshmi and Manish Rai / Geological Society, London, Special Publications, 497, 9-26, 24 March 2020, https://doi.org/10.1144/SP497-2019-119 --- Archaeointensity of nineteenth-century Scottish firebricks from a foundry in Melbourne, Australia: comparisons with field models and magnetic observatory data / Agathe Lisé-Pronovost, Tom Mallett and Andy I. R. Herries / Geological Society, London, Special Publications, 497, 27-45, 16 January 2020, https://doi.org/10.1144/SP497-2019-72 --- The first archaeointensity records from New Zealand: evidence for a fifteenth century AD archaeomagnetic ‘spike’ in the SW Pacific Region? / Gillian M. Turner, Rimpy Kinger, Bruce McFadgen and Monique Gevers / Geological Society, London, Special Publications, 497, 47-72, 3 April 2020, https://doi.org/10.1144/SP497-2019-71 --- Refining the high-fidelity archaeointensity curve for western Europe over the past millennium: analysis of Tuscan architectural bricks (Italy) / Agnès Genevey, Claudia Principe, Yves Gallet, Giuseppe Clemente, Maxime Le Goff, Alexandre Fournier and Pasquino Pallecchi / Geological Society, London, Special Publications, 497, 73-88, 16 December 2019, https://doi.org/10.1144/SP497-2019-74 --- Archaeomagnetic knowledge of the Neolithic in Bulgaria with emphasis on intensity changes / Maria Kostadinova-Avramova, Mary Kovacheva, Yavor Boyadzhiev and Gwenaël Hervé / Geological Society, London, Special Publications, 497, 89-111, 18 December 2019, https://doi.org/10.1144/SP497-2019-48 --- On the resolution of regional archaeomagnetism: untangling directional geomagnetic oscillations and data uncertainties using the French archaeomagnetic database for dates between AD 1000 and 1500 as a guide / Maxime Le Goff and Yves Gallet / Geological Society, London, Special Publications, 497, 113-126, 17 December 2019, https://doi.org/10.1144/SP497-2019-32 --- Palaeosecular variations of the geomagnetic field in Africa during the Holocene: a review / Anita Di Chiara / Geological Society, London, Special Publications, 497, 127-141, 8 April 2020, https://doi.org/10.1144/SP497-2019-51 --- A test of the pseudo-Thellier technique for determining relative palaeointensity in the Tirna Basin, Osmanabad, Maharashtra, India / B. V. Lakshmi, K. Deenadayalan and P. B. Gawali / Geological Society, London, Special Publications, 497, 143-158, 24 January 2020, https://doi.org/10.1144/SP497-2019-77 --- A 4500 year record of palaeomagnetic secular variation and relative palaeointensity from the Tyrrhenian Sea / Pontus Lurcock, Fabio Florindo, Sergio Bonomo, Antonio Cascella, Federico Di Rita, Luciana Ferraro, Donatella Domenica Insinga, Donatella Magri, Giulia Margaritelli, Nicola Pelosi, Paola Petrosino, Mattia Vallefuoco, Claudia Cosentino and Fabrizio Lirer / Geological Society, London, Special Publications, 497, 159-178, 27 July 2020, https://doi.org/10.1144/SP497-2019-255 --- Integrated high-resolution PSV, RPI and 14C study of IODP-347 Site M0060 (Anholt Loch, Baltic Sea) for the last c. 14 ka / Emilio Herrero-Bervera and Ian Snowball / Geological Society, London, Special Publications, 497, 179-192, 20 July 2020, https://doi.org/10.1144/SP497-2019-147 --- Kinematics of the virtual geomagnetic poles during Brunhes–Matuyama times / George Caminha-Maciel and Marcia Ernesto / Geological Society, London, Special Publications, 497, 193-204, 27 January 2020, https://doi.org/10.1144/SP497-2019-80 --- The geomagnetic field's imprint on the twentieth century's climate variability / N. A. Kilifarska, V. G. Bakhmutov and G. V. Melnyk / Geological Society, London, Special Publications, 497, 205-227, 13 July 2020, https://doi.org/10.1144/SP497-20
    Pages: Online-Ressource (234 Seiten) , Illustrationen, Diagramme, Karten
    ISBN: 9781786204738
    URL: https://sp.lyellcollection.org/content/497/1
    Language: English
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  • 2
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    Statistical assessment of the preferred longitudinal bands for recent geomagnetic reversal records (1992)
    American Geophysical Union
    Details
    Publication Date: 1992-10-23
    Print ISSN: 0094-8276
    Electronic ISSN: 1944-8007
    Topics: Geosciences , Physics
    Published by American Geophysical Union
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  • 3
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    Sedimentary records of reversal transitions - Magnetization smoothing artefact or geomagnetic field behaviour? (1992)
    American Geophysical Union
    Details
    Publication Date: 1992-10-23
    Print ISSN: 0094-8276
    Electronic ISSN: 1944-8007
    Topics: Geosciences , Physics
    Published by American Geophysical Union
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  • 4
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    Flow Directions and Paleomagnetic Study of Rocks from the Azufre Volcano, Argentina. (1994)
    Society of Geomagnetism and Earth, Planetary and Space Sciences
    Details
    Publication Date: 1994-01-01
    Print ISSN: 0022-1392
    Topics: Geosciences
    Published by Society of Geomagnetism and Earth, Planetary and Space Sciences
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  • 5
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    Magnetic fabric and inferred flow directions of dikes and conesheets of the Miocene Tejeda Caldera Complex, Gran Canaria Island, Spain (2023)
    In:  XXVIII General Assembly of the International Union of Geodesy and Geophysics (IUGG)
    Details
    Publication Date: 2023-07-25
    Description: The Miocene Tejeda Complex on the Gran Canaria (Canary Islands) is characterized by more than 500 trachytic and phonolitic conesheets, dikes and hypabyssal syenite stocks and subordinate radial dikes from a 20-km diameter intrusive complex in the volcaniclastic fill of the Miocene Tejeda caldera (20 by 35 km) on Gran Canaria, Canary Islands. The dikes intruded concentrically around a central axis or radial symmetry and dip uniformly an average of ~41degrees toward the center. We have conducted a pilot study of magnetic properties as well as Anisotropy of Magnetic Susceptibility (AMS) on a variety of dikes (trachytic, phonolitic and basaltic composition) to investigate the possibility of obtaining petrofabrics results that would allow us to test the origin of the formation of the Tejeda conesheet that most likely resulted from the deformation processes due to resurgent doming initiated by current replenishment of a flat lacollith-like magma chamber. The current ideas indicate that the formation of the cone-shaped fractures were originated by a magma supply exceeding the volume that could be compensated for by up-doming of the overlying caldera fill. Here we present the results of the rock magnetic experiments such as low-field susceptibility vs temperature (k-T), hysteresis loops, SIRM, back-fields as well as successful AMS direction of flows using Kmax determinations.
    Language: English
    Type: info:eu-repo/semantics/conferenceObject
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  • 6
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    A paleomagnetic and multimethod paleointensity study on the Pleistocene Khaveti lava flow sequence in Georgia (2023)
    In:  XXVIII General Assembly of the International Union of Geodesy and Geophysics (IUGG)
    Details
    Publication Date: 2023-08-30
    Description: A paleomagnetic and rock magnetic study was carried out on 28 successive Pleistocene basaltic lava flows from the Khaveti sequence in the Djavakheti Highland in the Lesser Caucasus in Georgia. For the present study, a new K-Ar dating has been performed on samples from the lower and the upper part of the section. Rock magnetism experiments were carried out on selected samples from all flows to characterise the carriers of remanence and obtain information about their stability. Thermomagnetic experiments mostly displayed reversible curves with magnetite as the only carrier of remanence, although titanomagnetites with differing content of titanium were also observed in some cases. Analysis of hysteresis parameters suggests that the grain size of most studied samples corresponds to pseudo single-domain particles, which can also be interpreted in terms of a mixture of single-domain and multi-domain grains. Paleomagnetic experiments revealed two clearly differing behaviours. While the upper 14 flows yielded a reverse polarity direction (D= 185.8°, I= -53.1°, α95= 2.3, k= 291.4), in the lower section of the sequence 13 flows revealed a transitional direction (D= 252.8°, I= 43.1°, α95= 3.7, k= 129.7) and one flow yielded no coherent results. Paleointensity experiments were carried out on samples from most flows with the Thellier-Coe method at the paleomagnetic laboratories of the University of Hawaii at Manoa (USA) and the University of Burgos (Spain) and with the multispecimen method at the paleomagnetic laboratory of UNAM at Morelia (Mexico). Interpretation of results is still underway.
    Language: English
    Type: info:eu-repo/semantics/conferenceObject
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