Article
Multidisciplinary Sciences
Stephan Homrighausen, Kaj Hoernle, Folkmar Hauff, Patrick A. Hoyer, Karsten M. Haase, Wolfram H. Geissler, Jorg Geldmacher
Summary: Recent studies reveal that mantle plumes play a crucial role in transferring material and heat from Earth's interior to its surface through multifaceted upwellings. The Tristan-Gough hotspot track, located in the South Atlantic, has provided evidence of spatial geochemical zonation in two distinct sub-tracks since around 70 million years ago. The origin and sudden appearance of these distinct geochemical flavors are still a mystery, but they could offer valuable insights into the structural evolution of mantle plumes.
NATURE COMMUNICATIONS
(2023)
Article
Geochemistry & Geophysics
Chuanshun Li, Haitao Zhang, Yili Guan, Aimei Zhu, Xuefa Shi
Summary: This study presents new major and trace element as well as Sr-Nd-Pb isotope data for basalts from the South Mid-Atlantic Ridge. The results indicate the presence of Tristan mantle plume materials in the southern SMAR asthenosphere, which has influenced the geochemical compositions of the basalts in this region.
Article
Geochemistry & Geophysics
Mike W. Jansen, Jonas Tusch, Carsten Muenker, Alessandro Bragagni, Riccardo Avanzinelli, Filippo Mastroianni, Finlay M. Stuart, Florian Kurzweil
Summary: Several studies have found small heterogeneities in the relative abundance of 182W, the radiogenic nuclide of short-lived 182Hf, in terrestrial rocks. The origin of this anomaly is still unclear, with proposed models focusing on core-mantle interaction or the presence of isolated reservoirs in the lower mantle. By comparing intraplate basalts in different regions, researchers discovered that there is generally a lack of 182W anomalies in European mantle-related basalts.
EARTH AND PLANETARY SCIENCE LETTERS
(2022)
Article
Geochemistry & Geophysics
Haitao Zhang, Quanshu Yan, Chuanshun Li, Xuefa Shi, Yaomin Yang, Guozhi Wang, Qingfeng Hua, Zhiwei Zhu, Hui Zhang, Renjie Zhao
Summary: The study reveals that basalts from the South Mid-Atlantic Ridge contain chemical traces of the Saint Helena hotspot, with its influence extending from approximately 14.2 degrees S to 20.8 degrees S. Material flow from Cardno seamount toward the SMAR system may account for the stronger geochemical signals observed in certain segments along the ridge axes.
EARTH AND PLANETARY SCIENCE LETTERS
(2021)
Article
Geochemistry & Geophysics
Chiara Civiero, Sergei Lebedev, Nicolas L. Celli
Summary: Hot plumes rising from Earth's deep mantle can cause uplift, rifting, and the formation of large igneous provinces (LIP). Through new technology, researchers have discovered hot, partially molten rock corridors in the East Africa-Arabia region, which are fed by three mantle upwellings. This suggests that complex-shaped plume heads can explain the scattered volcanism in broad areas and may be an inherent feature of plume-continent interaction.
GEOCHEMISTRY GEOPHYSICS GEOSYSTEMS
(2022)
Article
Geochemistry & Geophysics
Antomat A. Macedo Filho, Maria Helena B. M. Hollanda
Summary: The Rio Ceara-Mirim magmatism in NE Brazil during the West Gondwana breakup produced Mesozoic giant arcuate dike swarms. Petrographic, mineralogical, geochemical and isotopic analyses revealed four geochemical groups with distinct compositions and isotopic signatures, indicating their different mantle sources.
Article
Geosciences, Multidisciplinary
Joshua J. Shea, Isra S. Ezad, Stephen F. Foley, Anthony W. Lanati
Summary: The Eastern Australian Volcanic Province (EAVP) is a discontinuous belt of Cenozoic mafic intraplate volcanoes along the eastern seaboard of Australia, with mantle-derived melts showing large ranges in major element concentrations. The EAVP is classified into three volcanic regions: Northern, Central, and Southern, each with distinct compositions and characteristics. The primitive melt compositions in the EAVP are produced by melting mantle source assemblages involving various proportions of different end-members and likely underwent mantle metasomatism related to past subduction events during the accretion of eastern Australia.
EARTH-SCIENCE REVIEWS
(2022)
Article
Geography, Physical
Giovanni Leone, Pablo Grosse, Caitlin Ahrens, Daniele Gasparri
Summary: This study examines the morphology and age characteristics of the volcanic edifices in the Alignment 3 on Mars. It finds that these volcanoes, formed by the same migrating mantle plume, exhibit significant variations in morphology. Additionally, the study suggests that the possible existence of composite volcanoes in Alignment 3 may be attributed to their peculiar eruptive histories rather than felsic compositions as observed on Earth. The analysis also reveals that the peak of the migrating mantle plume coincides with the large volcanoes of the Tharsis Group, indicating the importance of the Alignment 3 as a geological feature on Mars.
Article
Geochemistry & Geophysics
Yanghui Zhao, Bryan Riel, Gillian Foulger, Weiwei Ding
Summary: In this study, Gaussian Process regression was used to reconstruct the seamount topography in the Pacific plate, revealing that previous estimates of erupted volumes were significantly underestimated. The study concludes that shallow processes rather than deep processes dominate the formation of seamounts, with proposed plumes contributing only a minority of the total intraplate volcanism in the Pacific plate.
EARTH AND PLANETARY SCIENCE LETTERS
(2022)
Article
Geochemistry & Geophysics
Matthew J. Comeau, Michael Becken, Alexander Grayver, Johannes S. Kaeufl, Alexey Kuvshinov
Summary: By analyzing high-resolution magnetotelluric data collected in central Mongolia, the structure of continental intraplate volcanic systems from surface to mantle source is revealed, showing low-resistivity anomalies in the middle-upper crust and lower crust, as well as thermal anomalies and partial melt zones in the mantle. The geophysical models provide insights into the continental intraplate volcanic system, indicating past transient magma pathways in the crust and a common mantle source for the volcanism.
EARTH AND PLANETARY SCIENCE LETTERS
(2022)
Article
Geochemistry & Geophysics
C. Rasoazanamparany, E. Widom, D. Kuentz, T. Raharimahefa, K. Rakotondravelo, A. M. F. Rakotondrazafy
Summary: Analysis of volcanic rocks and tephra from the Itasy volcanic field in central Madagascar reveals geochemical characteristics similar to ocean island basalts, with significant geochemical and isotopic heterogeneity, likely originating from the mantle. A mixing model suggests that the isotopic composition of Itasy magmas may result from a mixture of multiple mantle sources.
GEOCHIMICA ET COSMOCHIMICA ACTA
(2021)
Article
Geochemistry & Geophysics
Bradley J. Peters, Andrea Mundl-Petermeier, Valerie A. Finlayson
Summary: The relationship between the isotopic composition of tungsten and the ratio of rhenium to iridium in lavas from Hawaii and Iceland suggests that these rocks may represent relics of core formation processes. This finding holds significant implications for understanding the formation and evolution of the Earth.
EARTH AND PLANETARY SCIENCE LETTERS
(2023)
Article
Geochemistry & Geophysics
Clement Vincent, Jung-Woo Park, Sang-Mook Lee, Jonguk Kim, Mi-Jung Lee, Sidonie Revillon
Summary: This study re-examined the MORB from the Central Indian Ridge (CIR) between 12 degrees and 17 degrees S, and found that the enriched lavas between 14 degrees and 15 degrees S were not only linked to the Reunion mantle plume, but also to a continental crust component. The new results show the complexity and heterogeneity of the upper mantle underlying the CIR.
JOURNAL OF GEOPHYSICAL RESEARCH-SOLID EARTH
(2022)
Review
Geosciences, Multidisciplinary
Aubreya Adams
Summary: The Cameroon Volcanic Line (CVL) of west Africa, which exhibits asynchronous volcanism along the line, poses challenges to common models of mantle processes and volcanic system genesis. Geophysical studies have been conducted to understand the complex geology of the region and potential geodynamic models for the CVL formation.
FRONTIERS IN EARTH SCIENCE
(2022)
Article
Geochemistry & Geophysics
Marc C. Halfar, Bradley J. Peters, James M. D. Day, Maria Schonbachler
Summary: The Mascarene Islands in the western Indian Ocean are surface expressions of the Reunion hotspot. The lavas from these islands have uniform isotopic composition and may have contributions from different sources. The lavas from Rodrigues Island may contain a unique component that is not found in other islands.
GEOCHIMICA ET COSMOCHIMICA ACTA
(2023)
Article
Oceanography
E. Wiles, A. Green, M. Watkeys, R. Botes, W. Jokat
DEEP-SEA RESEARCH PART II-TOPICAL STUDIES IN OCEANOGRAPHY
(2019)
Article
Geosciences, Multidisciplinary
Graeme Eagles, Nanna B. Karlsson, Antonia Ruppel, Daniel Steinhage, Wilfried Jokat, Andreas Laeufer
Article
Geosciences, Multidisciplinary
Antonia Ruppel, Joachim Jacobs, Graeme Eagles, Andreas Laeufer, Wilfried Jokat
Article
Geochemistry & Geophysics
Christian Olaf Mueller, Wilfried Jokat
Article
Geosciences, Multidisciplinary
Claudia Monika Schimschal, Wilfried Jokat
Review
Geochemistry & Geophysics
M. Vernet, W. Geibert, M. Hoppema, P. J. Brown, C. Haas, H. H. Hellmer, W. Jokat, L. Jullion, M. Mazloff, D. C. E. Bakker, J. A. Brearley, P. Croot, T. Hattermann, J. Hauck, C. -D. Hillenbrand, C. J. M. Hoppe, O. Huhn, B. P. Koch, O. J. Lechtenfeld, M. P. Meredith, A. C. Naveira Garabato, E-M. Noethig, I. Peeken, M. M. Rutgers van der Loeff, S. Schmidtko, M. Schroeder, V. H. Strass, S. Torres-Valdes, A. Verdy
REVIEWS OF GEOPHYSICS
(2019)
Article
Geochemistry & Geophysics
I. Sauermilch, J. M. Whittaker, P. K. Bijl, J. M. Totterdell, W. Jokat
JOURNAL OF GEOPHYSICAL RESEARCH-SOLID EARTH
(2019)
Article
Geosciences, Multidisciplinary
S. Thoram, W. W. Sager, W. Jokat
GEOPHYSICAL RESEARCH LETTERS
(2019)
Article
Geochemistry & Geophysics
Claudia Monika Schimschal, Wilfried Jokat
Article
Geochemistry & Geophysics
Wilfried Jokat, John O'Connor, Folkmar Hauff, Anthony A. P. Koppers, Dan P. Miggins
GEOCHEMISTRY GEOPHYSICS GEOSYSTEMS
(2019)
Article
Geosciences, Multidisciplinary
Mathieu Morlighem, Eric Rignot, Tobias Binder, Donald Blankenship, Reinhard Drews, Graeme Eagles, Olaf Eisen, Fausto Ferraccioli, Rene Forsberg, Peter Fretwell, Vikram Goel, Jamin S. Greenbaum, Hilmar Gudmundsson, Jingxue Guo, Veit Helm, Coen Hofstede, Ian Howat, Angelika Humbert, Wilfried Jokat, Nanna B. Karlsson, Won Sang Lee, Kenichi Matsuoka, Romain Millan, Jeremie Mouginot, John Paden, Frank Pattyn, Jason Roberts, Sebastian Rosier, Antonia Ruppel, Helene Seroussi, Emma C. Smith, Daniel Steinhage, Bo Sun, Michiel R. van den Broeke, Tas D. van Ommen, Melchior van Wessem, Duncan A. Young
Article
Geochemistry & Geophysics
Maren Vormann, Dieter Franke, Wilfried Jokat
Article
Multidisciplinary Sciences
John M. O'Connor, Wilfried Jokat, Marcel Regelous, Klaudia F. Kuiper, Daniel P. Miggins, Anthony A. P. Koppers
NATURE COMMUNICATIONS
(2019)
Article
Geosciences, Multidisciplinary
E. Wiles, M. Watkeys, W. Jokat
JOURNAL OF AFRICAN EARTH SCIENCES
(2020)
Article
Geochemistry & Geophysics
Tabea Altenbernd, Wilfried Jokat, Wolfram Geissler