Article
Geochemistry & Geophysics
Antje Duerkefaelden, Joerg Geldmacher, Maxim Portnyagin, Dieter Garbe-Schoenberg, Reinhard Werner, Dietmar Mueller, Folkmar Hauff, Kaj Hoernle
Summary: Geochemical data and plate tectonic reconstructions support the formation of Shatsky Rise by a mantle plume, with the identification of two hotspot tracks—Papanin Ridge and Ojin Rise Seamounts verifying this hypothesis.
GEOCHEMISTRY GEOPHYSICS GEOSYSTEMS
(2021)
Article
Geochemistry & Geophysics
Kevin M. Gaastra, Richard G. Gordon, Daniel T. Woodworth
Summary: The motion of the Pacific plate relative to Pacific hotspots produces age-progressive chains of volcanoes. Analysis of volcano locations and age dates indicate that the motions of the Hawaii, Louisville, and Rurutu hotspots are insignificant. The initiation of the Eocene collision of India with Eurasia preceded the formation of the bends in the Pacific hotspot chains.
Article
Geochemistry & Geophysics
Xun Wei, Xue-Fa Shi, Yi-Gang Xu, Paterno R. Castillo, Yan Zhang, Le Zhang, Hui Zhang
Summary: The geochemical and isotopic analysis of lavas from the Southern Wake seamount trail suggest a derivation from partial melting of secondary plume clusters emanating from the top of the Arago mantle plume. Another possibility is that the lavas could have originated from secondary plumelets associated with the Pacific Large Low Shear Velocity Province (LLSVP). The lavas show signatures of FOZO-HIMU-like isotopic compositions, falling within the Arago hotspot field.
Review
Geosciences, Multidisciplinary
Jack F. Ward, Gideon Rosenbaum, Teresa Ubide, Jonny Wu, John T. Caulfield, Mike Sandiford, Derya Guerer
Summary: Studies have shown that intraplate volcanoes in East Asia are likely formed by decompression melting associated with convective upwellings at the edges of the Pacific and Philippine Sea slabs, rather than mantle plume activity or typical subduction zone slab metasomatism. The Quaternary rollback of the Philippine slab may also be responsible for volcanic activity at Jeju, located at the leading edge of the Philippine Sea slab.
EARTH-SCIENCE REVIEWS
(2021)
Article
Geosciences, Multidisciplinary
Minglong Li, Liang Qiu, Deshun Zheng, Dan-Ping Yan, Youjun Zhang, Boyong Yang, Mingyin Yang, Zhiyong Cai, Keyuan Xu, Qiang Huang, Wangxue Tian
Summary: By studying the geochemical, isotopic, and age characteristics of a volcanic ash in the rift basin of southern China, we found that it originated from a mixed mantle-crust source. Based on sedimentological and tectonic history, as well as the geochronology and geochemistry of the ash, we propose that it erupted in a rift environment and records the hidden hotspot activity beneath the northern South China Block.
Article
Geosciences, Multidisciplinary
Chiara Civiero, Susana Custodio, Marta Neres, David Schlaphorst, Joao Mata, Graca Silveira
Summary: The Canary and Madeira provinces in the Central-East Atlantic Ocean show irregular distribution of volcanism due to the Central-East Atlantic Anomaly (CEAA) which rises from the core-mantle boundary and stalls in the topmost lower mantle, causing distinct upper-mantle upwellings in the region. The accumulation of plume material in the topmost lower mantle plays a key role in governing the first-order spatio-temporal irregularities in the distribution of hotspot volcanism.
GEOPHYSICAL RESEARCH LETTERS
(2021)
Article
Geochemistry & Geophysics
Hwaju Lee, Maximiliano J. Bezada, YoungHee Kim
Summary: The study suggests that the channeling of the Canary Plume and consequent lithospheric delamination may have caused the low-velocity anomalies beneath the Moroccan Atlas Mountains. By incorporating anisotropy as a prior constraint, the researchers found that the improved results support the hypothesis that the low-velocity anomalies come from the mantle material of the Canary Plume.
JOURNAL OF GEOPHYSICAL RESEARCH-SOLID EARTH
(2022)
Article
Geochemistry & Geophysics
Yue Cai, Sara Mana, Stephen E. Cox, Catherine C. Beck, Craig Feibel, Jean Hanley, Tanzhuo Liu, Louise Bolge, Sidney Hemming, Steven L. Goldstein
Summary: There is a consensus that volcanism along the East African Rift System (EARS) is related to plume activities. The Turkana Basin has a unique lithospheric mantle which provides valuable insights into plume-related volcanism. Different time periods in the Turkana Basin exhibit distinct geochemical and isotopic signatures, suggesting variations in the structure and evolution of the plume.
JOURNAL OF GEOPHYSICAL RESEARCH-SOLID EARTH
(2023)
Article
Environmental Sciences
Keir Becker, Richard E. Thomson, Earl E. Davis, Heinrich Villinger, C. Geoffrey Wheat
Summary: The renewal of bottom water on the western flank of the mid-Atlantic Ridge is driven by the rapid intrusion of cold, dense water enabled by gradual warming due to geothermal heat flux and diapycnal mixing, as revealed by a six-year observational study. The study also shows long periods of slow temperature rises punctuated by rapid cooling events, indicating displacement of heated bottom waters by cold, dense water incursions over the deepest part of the basin. Profiles of bottom water properties suggest the incursion of diluted Antarctic Bottom Water from the west.
COMMUNICATIONS EARTH & ENVIRONMENT
(2021)
Article
Agriculture, Dairy & Animal Science
Gabriela M. Velez-Rubio, Laura Prosdocimi, Milagros Lopez-Mendilaharsu, Maria Noel Caraccio, Alejandro Fallabrino, Erin L. LaCasella, Peter H. Dutton
Summary: This study investigates the genetic diversity, spatiotemporal distribution, and associated threats of a foraging aggregation in the Southwest Atlantic Ocean. The results show that the aggregation is composed of large juveniles and adults primarily from West African rookeries, and there is significant seasonal and interannual variability in strandings. The findings emphasize the importance of determining regional habitat use and migratory routes across the broader Atlantic region to develop effective conservation measures.
Review
Marine & Freshwater Biology
Amanda Luna, Francisco Rocha, Catalina Perales-Raya
Summary: An extensive review of cephalopod fauna in the Central and North Atlantic coast of Africa revealed a total of 138 species, with expanded geographic distribution ranges for some species.
JOURNAL OF THE MARINE BIOLOGICAL ASSOCIATION OF THE UNITED KINGDOM
(2021)
Article
Geosciences, Multidisciplinary
Congkai Niu, Dujie Hou, Xiong Cheng, Xu Han, Yaxi Li
Summary: The effect of depositional environment on dibenzothiophenes in nine oils from Huanghekou East Sag and Laizhouwan Northeast Sag, Bohai Bay Basin, China was investigated. The results showed that high-sulfur oils mainly originated from carbonate-rich source rocks in more saline environments, while low-sulfur oils derived from clay-rich source rocks deposited in freshwater conditions.
MARINE AND PETROLEUM GEOLOGY
(2022)
Article
Geosciences, Multidisciplinary
Lucinda K. Layfield, Nick Schofield, Douglas Watson, Simon P. Holford, David W. Jolley, Ben A. Kilhams, David K. Muirhead, Alan M. Roberts, Andrew D. Alvey, Alex Ellwood, Mike Widdowson
Summary: Lower crustal intrusions are commonly observed along volcanic or magma-rich passive margins. This study provides evidence of such intrusions beneath the Faroe-Shetland Basin using seismic reflection data and gravity modeling.
JOURNAL OF THE GEOLOGICAL SOCIETY
(2023)
Article
Energy & Fuels
Teng Jianbin, Qiu Longwei, Zhang Shoupeng, Ma Cunfei
Summary: The origin of dolomite in the Shahejie Formation shale in the Jiyang Depression, Eastern China, was studied using various methods. The development of dolomite was found to be limited in the organic-rich shale of the study area. Three types of dolomite minerals were identified: primary dolomite, penecontemporaneous dolomite, and ankerite. The primary and penecontemporaneous dolomite crystals were found to have different maturation and growth mechanisms. The formation temperature of the dolomite was calculated to be between 36.76-45.83 degrees C, indicating that it is a low-temperature lacustrine dolomite.
PETROLEUM EXPLORATION AND DEVELOPMENT
(2022)
Article
Chemistry, Multidisciplinary
Congkai Niu, Dujie Hou, Xiong Cheng, Xu Han, Yan Li, Yaxi Li
Summary: The study of a suite of low-mature crude oils from the Huanghekou and the Laizhouwan Sags in the Bohai Bay Basin reveals the diverse sources, transformation processes, and influencing factors of hopanoids. The diversity of sources and environmental factors play an important role in shaping the characteristics of hopanoids.
Article
Geosciences, Multidisciplinary
S. Jung, F. Hauff
Summary: Pegmatites and aplites from the Donkerhoek batholith in Namibia are peraluminous, ferroan, alkalic to calc-alkalic leucogranites. These highly fractionated melts show subtle Nd isotope variations and limited AFC or contamination processes may have occurred during their formation. The rocks likely originated from meta-igneous basement rocks in the nearby Kalahari craton.
JOURNAL OF AFRICAN EARTH SCIENCES
(2021)
Article
Geochemistry & Geophysics
J. Gill, K. Hoernle, E. Todd, F. Hauff, R. Werner, C. Timm, D. Garbe-Schoenberg, M. Gutjahr
Summary: The Havre Trough in the southwest Pacific is in the rifting stage of development, with uneven distribution of slab components. The southern slab source is wetter while the northern source is drier, with a higher proportion of slab components in the south. Additionally, the slab component increases gradually southward in the backarc and arc front.
GEOCHEMISTRY GEOPHYSICS GEOSYSTEMS
(2021)
Article
Geology
K. Hoernle, J. Gill, C. Timm, F. Hauff, R. Werner, D. Garbe-Schonberg, M. Gutjahr
Summary: The study indicates that the Colville Ridge has higher more-incompatible element ratios compared to the Kermadec Ridge, suggesting its origin from a more enriched upper mantle. Between 8 and 3 million years ago, the entire arc included enriched compositions with specific isotope ratios, possibly formed by enriched Vitiaz arc end members and plateau characteristics.
Article
Geosciences, Multidisciplinary
Manuel Demartis, Stefan Jung, Folkmar Hauff, Eugenio Aragon, Fernando Javier D'Eramo, Jorge Enrique Coniglio, Lucio Pedro Pinotti, Maria Alejandra Boffadossi, Maria Eugenia Muratori, Joaquin Coniglio
Summary: In the Comechingones pegmatitic field in central Argentina, leucogranite and pegmatite bodies were emplaced synkinematically with the main deformational event of the Guacha Corral shear zone during the Early Ordovician. The geochemical and isotopic characteristics of these rocks suggest processes such as water-fluxed partial melting, fractionation, and assimilation, explaining their origin and evolution.
INTERNATIONAL JOURNAL OF EARTH SCIENCES
(2021)
Article
Geosciences, Multidisciplinary
S. Aspiotis, S. Jung, F. Hauff, R. L. Romer
Summary: The study suggests that the Nomatsaus granite was formed in a continent-continent collisional setting with meta-igneous sources of possibly dacitic composition. Partial melting occurred during the initial stages of crustal heating, followed by mid-crustal level melting at higher P-T conditions and relatively late in the orogenic evolution. The petrogenetic model for the Nomatsaus granite is mainly based on the chemical characteristics and isotopic composition of the granite.
INTERNATIONAL JOURNAL OF EARTH SCIENCES
(2021)
Article
Geochemistry & Geophysics
S. Homrighausen, K. Hoernle, J-A Wartho, F. Hauff, R. Werner
Summary: The volcanic activity along the Elan 85° East Ridge in the Indian Ocean is influenced by deep-rooted mantle plumes, with age decreasing from north to south and involving a mixture of Indian-type plume material, Indian mid-ocean-ridge basalt, and detached continental lithospheric material. Plate reconstructions suggest that the southern portion of the ridge could be derived from a hotspot/plume at the Conrad Rise, explaining the weaker expression of this hotspot track compared to others like Reunion and Kerguelen.
Article
Geography, Physical
Ingrid A. Ukstins, Jo-Anne Wartho, Nathalie A. Cabrol, Edmond A. Grin, Matthijs C. van Soest, Marc B. Biren, Kip Hodges, Guillermo Chong
Summary: Single-crystal (U-Th)/He dating of 32 apatite and zircon crystals from an impact breccia in the Monturaqui impact structure in Chile yielded a weighted mean age of 663 +/- 28 ka. Numerical modeling showed that even in small craters like Monturaqui, the short-lived compressional stage and shock metamorphic stage can explain the observed partial to full resetting of (U-Th)/He ages in accessory minerals.
QUATERNARY GEOCHRONOLOGY
(2022)
Article
Geochemistry & Geophysics
Wissale Boukirou, Mohammed Bouabdellah, Anton R. Chakhmouradian, Abdellah Mouttaqi, Ekaterina P. Reguir, Folkmar Hauff, Michel Cuney, Michel Jebrak, Johan Yans, Kaj Hoernle
Summary: The Gleibat Lafhouda dolomite carbonatites of the Moroccan Sahara are three separate cone-shaped plugs that intrude an Archean supracrustal basement rocks. These carbonatites have specific geochemical characteristics and may represent the earliest manifestation of the fragmentation of the Columbia supercontinent at 1.85 Ga.
Article
Geochemistry & Geophysics
Wim Boer, Simon Nordstad, Michael Weber, Regina Mertz-Kraus, Barbel Hoenisch, Jelle Bijma, Markus Raitzsch, Dorothee Wilhelms-Dick, Gavin L. Foster, Heather Goring-Harford, Dirk Nuernberg, Folkmar Hauff, Henning Kuhnert, Federico Lugli, Howie Spero, Martin Rosner, Piet van Gaever, Lennart J. de Nooijer, Gert-Jan Reichart
Summary: A new matrix-matched reference material (NFHS-2-NP) has been developed and tested by multiple laboratories, demonstrating satisfactory homogeneity and suitability for calibration and quality monitoring of geochemical techniques.
GEOSTANDARDS AND GEOANALYTICAL RESEARCH
(2022)
Article
Geosciences, Multidisciplinary
Lisa K. Samrock, Thor H. Hansteen, Wolf-Christian Dullo, Jo-Anne Wartho
Summary: This study investigated the Miocene evolution of Maio Island through structural analysis and dating research. The results showed that the island experienced a main period of growth between approximately 16 and 8.7 Ma, with large-scale flank collapses and erosion occurring between 8.7 and 6.7 Ma. The interaction between flank collapses and volcanism may be a key factor in the evolution of ocean islands worldwide.
INTERNATIONAL JOURNAL OF EARTH SCIENCES
(2022)
Article
Geochemistry & Geophysics
H. Shafaii Moghadam, K. Hoernle, F. Hauff, D. Garbe-Schoenberg, J. A. Pfaender
Summary: High Na-to K-alkaline magmatism is common in the rear-arc region of the Cenozoic Urumieh-Dokhtar Magmatic Belt in Iran. The Kleybar area in NW Iran shows Middle Eocene magmatic activity with diverse rock types and significant isotopic variations, enriched in alkalis and light rare earth elements.
Article
Geosciences, Multidisciplinary
Katharina Pank, Thor H. Hansteen, Jorg Geldmacher, Folkmar Hauff, Brian Jicha, Paraskevi Nomikou, Dieter Garbe-Schonberg, Kaj Hoernle
Summary: The study focuses on samples from the submarine inner caldera walls of Santorini Volcano, providing new insights into its early evolutionary stages and contributing to a better understanding of its eruptive history and potential risks. The analysis of mineral compositions and rock compositions reveals the dominant processes and factors influencing magma evolution.
JOURNAL OF VOLCANOLOGY AND GEOTHERMAL RESEARCH
(2022)
Article
Geosciences, Multidisciplinary
H. Zhou, K. Hoernle, J. Geldmacher, F. Hauff, D. Garbe-Schoenberg, S. Jung, I Bindeman
Summary: By studying the Etendeka large igneous province in Namibia, it has been found that the compositional variations of the flood basalts are related to a postulated plume head, and a concentric zonation model for the plume head has been proposed.
Article
Geochemistry & Geophysics
James Gill, Erin Todd, Kaj Hoernle, Folkmar Hauff, Allison Ann Price, Matthew G. Jackson
Summary: The Vitiaz Arc broke into its Vanuatu and Fijian portions during subduction polarity reversal, possibly controlled by the subduction of the Samoan Seamount Chain. Basaltic volcanism in Fiji accompanying the breakup showed different characteristics based on the distance from the broken edge of the arc. The breakup basalts had similar Sr-Pb-Nd isotope ratios to the depleted part of the nearby Samoan seamount chain, indicating a change in the slab-derived component.
GEOCHEMISTRY GEOPHYSICS GEOSYSTEMS
(2022)
Article
Geography, Physical
Vera Ponomareva, Maxim Portnyagin, Martin Danisik, Evgeny Konstantinov, Egor Zelenin, Nikolai Tkach, Folkmar Hauff, Axel K. Schmitt, Bjarne Friedrichs, Boris Romanyuk, Marcel Guillong, Christopher L. Kirkland, Kai Rankenburg, Samuel Muller, Dieter Garbe-Schonberg
Summary: Knowledge of temporal patterns of past explosive eruptions is essential for understanding potential future eruptive behavior. The volcanic records based on geological reconstructions are incomplete, even in populated areas like Europe. This study presents the first age and geochemical data on middle to late Pleistocene explosive eruptions from the Elbrus volcanic center, providing insights into their dispersal distances and identifying them as paleoclimate and archaeological markers.
QUATERNARY SCIENCE REVIEWS
(2023)