Article
Geosciences, Multidisciplinary
Ya-Nan Shi, Jason P. Morgan
Summary: This study examines the delamination of the lower lithosphere induced by the Yellowstone plume and its interaction with the western North American lithosphere. The excess melting caused by the filling of a hole by the Yellowstone plume material triggered the excess melting event of the Columbia River Basalt about 17 million years ago. The delaminated lower lithosphere is currently located to the northeast of the Columbia River Basalt.
GEOPHYSICAL RESEARCH LETTERS
(2022)
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
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
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
Multidisciplinary Sciences
Jason P. Morgan, Paola Vannucchi
Summary: When continents collide, fragments of seafloor can be trapped within the growing orogenic belt, forming a unique form of continental crust and lithosphere known as transmogrified basin. These basins, originally stronger blocks, will eventually become sites for continental rifting. In modern Asia, transmogrifying basins have played a significant role in the formation of mountain belts and the strengthening of the East Asian Monsoon.
PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA
(2022)
Article
Multidisciplinary Sciences
Paola Vannucchi, Alexander Clarke, Albert de Montserrat, Audrey Ougier-Simonin, Luca Aldega, Jason P. Morgan
Summary: Researchers use multiple approaches to explain the occurrence and characteristics of seismic tremors on subduction plate boundaries. They find that blocks of weak rocks in a stronger matrix can explain these tremor events, and provide evidence through geological observations, geomechanical lab measurements, and numerical simulations.
NATURE COMMUNICATIONS
(2022)
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
H. Zhou, K. Hoernle, J. Geldmacher, F. Hauff, S. Homrighausen, D. Garbe-Schoenberg, S. Jung, I Bindeman
Summary: The origin of carbonatitic and highly silica-undersaturated volcanism along the SW coast of Africa is still poorly understood. New geochemical data from samples in Namibia suggest that the volcanism is derived from a HIMU-type magma source, similar to the St. Helena global HIMU endmember. Additionally, a new HIMU endmember flavor may be represented in the Dicker Willem carbonatites.
Article
Multidisciplinary Sciences
Shanshan Wu, Zhen Guo, Yongshun John Chen, Jason P. Morgan
Summary: In the last 50 million years, the East Asian continent has experienced massive continental collision and deformation. The relationship between lithospheric deformation and asthenospheric flow has been difficult to determine. This study presents a high resolution 3-D model for the northeastern Tibetan Plateau, revealing the blocking effect of cratonic keels on asthenosphere flow and the different flow directions between asthenosphere and overlying lithosphere.
PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA
(2022)
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)
Article
Geochemistry & Geophysics
Ba Manh Le, Ting Yang, Jason P. P. Morgan
Summary: We infer the lithospheric structure beneath the Hawaiian Swell based on a joint inversion of ambient noise and teleseismic Rayleigh waves collected during the PLUME experiment. We find low-velocity anomalies beneath the lithosphere along the island chain and beneath the North Arch, consistent with the presence of melting regions and recent volcanic fields.
JOURNAL OF GEOPHYSICAL RESEARCH-SOLID EARTH
(2022)
Article
Multidisciplinary Sciences
Liang Liu, Lijun Liu, Jason. P. Morgan, Yi-Gang Xu, Ling Chen
Summary: The type of lithosphere subducted between India and Tibet has been a subject of debate, with suggestions ranging from completely continental to entirely oceanic or a mixture of the two. This study uses numerical models to explore the nature and density structure of the lost lithosphere and shows that Tibetan tectonism away from the Himalayan syntaxis is consistent with the initial indentation of a craton-like terrane followed by the subduction of a buoyant tectonic plate with a thin crust.
NATURE COMMUNICATIONS
(2023)
Article
Environmental Sciences
Patrick A. Hoyer, Karsten M. Haase, Marcel Regelous, John M. O'Connor, Stephan Homrighausen, Wolfram H. Geissler, Wilfried Jokat
Summary: The Rio Grande Rise in the South Atlantic Ocean is an oceanic plateau formed by mantle plume and rift-related volcanism, without a continental crust component.
COMMUNICATIONS EARTH & ENVIRONMENT
(2022)
