Article
Geochemistry & Geophysics
Masahiko Sato, Yuki Kimura, Satoshi Tanaka, Tadahiro Hatakeyama, Seiji Sugita, Tomoki Nakamuna, Shogo Tachibana, Hisayoshi Yurimoto, Takaaki Noguchi, Ryuji Okazaki, Hikaru Yabuta, Hiroshi Naraoka, Kanako Sakamoto, Toru Yada, Masahiro Nishimura, Aiko Nakato, Akiko Miyazaki, Kasumi Yogata, Masanao Abe, Tatsuaki Okada, Tomohiro Usui, Makoto Yoshikawa, Takanao Saiki, Fuyuto Terui, Satoru Nakazawa, Sei-ichiro Watanabe, Yuichi Tsuda
Summary: In this study, magnetic measurements and paleointensity calibration experiments were conducted on samples from asteroid Ryugu and two carbonaceous chondrites to evaluate their ability as paleomagnetic recorders. The results showed that framboidal magnetite was the dominant remanence carrier in the Ryugu samples and the paleointensity values indicated a strong magnetic field in the protoplanetary disk.
JOURNAL OF GEOPHYSICAL RESEARCH-PLANETS
(2022)
Article
Geochemistry & Geophysics
Toshitsugu Yamazaki, Jiaxi Li, Takaya Shimono, Toshiya Kanamatsu
Summary: Progress in estimating relative paleointensity (RPI) using marine sediments has contributed to a better understanding of the behavior of the past geomagnetic field. One challenge is that variations in magnetic-mineral assemblages induced by climate can affect RPI records. This study showed that the RPI recording efficiency of magnetofossils is lower than that of detrital unprotected magnetites/maghemites, and changes in their relative abundance do not influence RPI estimations.
JOURNAL OF GEOPHYSICAL RESEARCH-SOLID EARTH
(2023)
Article
Multidisciplinary Sciences
Tinghong Zhou, John A. Tarduno, Francis Nimmo, Rory D. Cottrell, Richard K. Bono, Mauricio Ibanez-Mejia, Wentao Huang, Matt Hamilton, Kenneth Kodama, Aleksey Smirnov, Ben Crummins, Frank Padgett
Summary: Paleomagnetism is used to understand the origin of inner core structure by determining when crystallization started. The study reveals that inner core nucleation began approximately 550 million years ago, and the growth of the inner core to 50% of its current radius occurred around 450 million years ago. Additionally, the seismic anisotropy of the outermost inner core reflects a global deep mantle structure that has persisted to the present day.
NATURE COMMUNICATIONS
(2022)
Article
Geosciences, Multidisciplinary
S. M. Tikoo, J. Jung
Summary: This study tested whether lunar samples could have been magnetized during return to Earth, sample handling, or transport. The results showed that high coercivity magnetizations observed within lunar rocks are generally not magnetic contamination and were initially acquired on the Moon.
GEOPHYSICAL RESEARCH LETTERS
(2023)
Article
Geochemistry & Geophysics
Elisa M. Sanchez-Moreno, Manuel Calvo-Rathert, Avto Goguitchaichvili, George T. Vashakidze, Pierre Camps, Juan Morales-Contreras, Nestor Vegas-Tubia, Vladimir A. Lebedev
Summary: Using a multimethod approach, including MSP and Thellier-type methods, reliable paleointensity data were obtained through strict selection criteria, demonstrating consistency in intensity values from different methods.
JOURNAL OF GEOPHYSICAL RESEARCH-SOLID EARTH
(2021)
Article
Geochemistry & Geophysics
M. Calvo Rathert, A. Carrancho, J. Morales, N. Perez-Rodriguez, V. A. Lebedev, A. Caccavari, N. Vegas, A. Goguitchaichvili
Summary: This study presents new radiometric ages and palaeomagnetic data from Sao Vicente Island, Cape Verde. The results show that the volcanic flows on the island were formed in the upper Miocene and have an anomalous palaeomagnetic direction. The rapid emplacement of the flows is also observed. The palaeointensity analysis reveals that the island's ancient magnetic field was significantly weaker than the present-day field.
GEOPHYSICAL JOURNAL INTERNATIONAL
(2022)
Article
Geochemistry & Geophysics
M. Calvo Rathert, A. Carrancho, J. Morales, N. Perez-Rodriguez, V. A. Lebedev, A. Caccavari, N. Vegas, A. Goguitchaichvili
Summary: This study presents new radiometric ages and full-vector palaeomagnetic data from SAo Vicente Island, Cape Verde. The age of the sequence is estimated to be between 6.03 and 6.23 Ma. The palaeomagnetic direction of the sequence shows a westward deviation of approximately 26.5 degrees and suggests rapid emplacement within a few centuries. The palaeointensity analysis reveals a significantly lower value compared to the present-day value.
GEOPHYSICAL JOURNAL INTERNATIONAL
(2022)
Article
Geosciences, Multidisciplinary
Doohee Jeong, Qingsong Liu, Yuhji Yamamoto, Yongjae Yu, Xiang Zhao, Huafeng Qin
Summary: Conventional Thellier-type paleointensity experiments do not guarantee the accuracy of paleointensity results, especially when the unblocking temperatures for newly formed magnetic particles are higher than the treatment temperature. The study reveals that the reliability of paleointensity results is strongly influenced by the domain state and thermal alteration.
EARTH PLANETS AND SPACE
(2021)
Article
Geosciences, Multidisciplinary
Jessica L. Till, Bruce Moskowitz, Simon W. Poulton
Summary: Fires significantly impact soil properties, with plant ashes being the main source of magnetic enhancement after burning. Mass-normalized saturation magnetization values of burnt plant residues increase with the extent of burning.
FRONTIERS IN EARTH SCIENCE
(2021)
Article
Geosciences, Multidisciplinary
Masako Tominaga, Estefania Ortiz, Joshua Franz Einsle, Noah Francis Ryoichi Vento, Matthew O. Schrenk, Iris Buisman, Isra S. Ezad, Dawn Cardace
Summary: This study utilized a novel approach combining multi-scale quantitative rock magnetic analyses and nano-resolution geochemical imaging analyses to investigate mineral weathering within a serpentinite formation in California. The findings revealed a new mode of magnetite production in serpentinites, highlighting the potential of magnetite abundance as a proxy for water-rock interaction in mantle peridotite and serpentinite.
GEOPHYSICAL RESEARCH LETTERS
(2021)
Article
Geosciences, Multidisciplinary
J. Michael Grappone, James M. Russell, Andrew J. Biggin
Summary: High-quality data are crucial in paleointensity research, and repeatedly heating specimens can affect data reliability. Conducting paleointensity experiments with fewer temperature steps concentrated at higher temperatures can help mitigate these effects.
EARTH PLANETS AND SPACE
(2021)
Article
Geochemistry & Geophysics
Yo-ichiro Otofuji, Makoto Fujihara, Koji Uno
Summary: This study examines the paleomagnetic properties of serpentine in the Paleozoic Oeyama ophiolite in Southwest Japan, revealing reversed polarity magnetizations and different directions based on the temperature range. The rock magnetism analysis suggests that the magnetite grains play a crucial role in recording the geomagnetic field information during serpentinization.
EARTH AND PLANETARY SCIENCE LETTERS
(2021)
Article
Geochemistry & Geophysics
Nayeli Perez-Rodriguez, Juan Morales, Ruben Cejudo, Marie-Noelle Guilbaud, Avto Goguitchaichvili
Summary: Multimethodological analysis has become popular in the last decade to ensure the quality of paleointensity determinations. This research reevaluates the intensities of three volcanic structures in central Mexico and discusses the quality of previously published data. Good concordance was found for samples from two of the volcanic structures, while a significant difference was observed in the results for the third structure. The study highlights the importance of considering rock-magnetic properties and the thermal alteration of samples in paleointensity determinations.
PHYSICS OF THE EARTH AND PLANETARY INTERIORS
(2022)
Article
Geochemistry & Geophysics
M. Calvo-Rathert, M. F. Bogalo, J. Morales, A. Goguitchaichvili, V. A. Lebedev, G. Vashakidze, N. Garcia-Redondo, E. Herrero-Bervera
Summary: The paleomagnetic and paleointensity experiments on rhyolitic and dacitic Cretaceous and Paleocene-Eocene lavas from the Lesser Caucasus suggest lower average dipole moments for the respective time periods. The analysis also indicates the occurrence of nearly vertical-axis rotations, possibly due to continental collision since the Oligocene. Absolute age determinations on three studied sites yielded Late Cretaceous ages.
JOURNAL OF GEOPHYSICAL RESEARCH-SOLID EARTH
(2021)
Article
Geochemistry & Geophysics
Frenk Out, David Cortes-Ortuno, Karl Fabian, Tristan van Leeuwen, Lennart de Groot
Summary: The Micromagnetic Tomography (MMT) technique, which combines high resolution scanning magnetometry and micro X-ray computed tomography, allows for the precise recovery of magnetic moments of individual magnetic grains in a sample. This study investigates the mathematical validity of MMT solutions by examining five factors: grain concentration, sample thickness, sample surface size, noise level in the magnetic scan, and sampling interval of the magnetic scan. Through numerical models, the influence of these parameters on the accuracy of the magnetizations of the grains is assessed. The authors also introduce a statistical uncertainty ratio and signal strength ratio to determine the most accurate solutions.
GEOCHEMISTRY GEOPHYSICS GEOSYSTEMS
(2022)
Article
Geochemistry & Geophysics
J. M. Feinberg, I. Lascu, E. A. Lima, B. P. Weiss, J. A. Dorale, E. C. Alexander, R. L. Edwards
EARTH AND PLANETARY SCIENCE LETTERS
(2020)
Article
Geochemistry & Geophysics
Andrea R. Biedermann, Mike Jackson, Michele D. Stillinger, Dario Bilardello, Joshua M. Feinberg
Article
Geosciences, Multidisciplinary
Benjamin J. Drenth, A. Kate Souders, Klaus J. Schulz, Joshua M. Feinberg, Raymond R. Anderson, Val W. Chandler, William F. Cannon, Ryan J. Clark
PRECAMBRIAN RESEARCH
(2020)
Article
Geosciences, Multidisciplinary
Plinio Jaqueto, Ricardo I. F. Trindade, Joshua M. Feinberg, Janine Carmo, Valdir F. Novello, Nicolas M. Strikis, Francisco W. Cruz, Marilia H. Shimizu, Ivo Karmann
Summary: Studies have found that speleothems are dominated by low-coercivity minerals with magnetic properties similar to those formed in pedogenic environments. In (sub-)tropical karst systems, ultrafine ferrimagnetic minerals play a key role, influenced by rainfall, biome, and epikarst dynamics. Through Spearman's rank correlation, a strong positive correlation was observed between magnetic concentration parameters in speleothems from diverse biomes, making them a valuable target for paleoenvironmental research in cave systems.
FRONTIERS IN EARTH SCIENCE
(2021)
Article
Geochemistry & Geophysics
Courtney J. Sprain, Joshua M. Feinberg, Riley Lamers, Richard K. Bono
Summary: The study confirms that clinkers may be reliable full vector paleomagnetic recorders, with different types of clinkers containing varying proportions of magnetic minerals. Clinker lithology is the primary control on magnetic mineralogy.
GEOCHEMISTRY GEOPHYSICS GEOSYSTEMS
(2021)
Article
Geosciences, Multidisciplinary
Mohammad Paknia, Paolo Ballato, Ghasem Heidarzadeh, Francesca Cifelli, Behrooz Oskooi, Joshua Feinberg, Mike Jackson, Dario Bilardello, Francesco Salvini, Majid Mirzaie Ataabadi, Meisam Tadayon, Mohammad Reza Ghassemi, Massimo Mattei
Summary: In this study, anisotropy of magnetic susceptibility (AMS) was combined with fault kinematic analysis and sedimentologic data to analyze deposits of the Upper Red Formation in the intermontane Tarom Basin of NW Iran. The study found that the Miocene extension observed in the basin is not regionally pervasive and not controlled by large-scale processes, suggesting that the normal faults were gravity instabilities induced by sedimentary processes rather than extensional tectonics.
JOURNAL OF ASIAN EARTH SCIENCES
(2021)
Article
Multidisciplinary Sciences
Plinio Jaqueto, Ricardo I. F. Trindade, Filipe Terra-Nova, Joshua M. Feinberg, Valdir F. Novello, Nicolas M. Strikis, Peter Schroedl, Vitor Azevedo, Beck E. Strauss, Francisco W. Cruz, Hai Cheng, R. Lawrence Edwards
Summary: Speleothems can provide continuous and high-quality records of the geomagnetic field. The paleomagnetic records of a mid-to-late Holocene stalagmite from Brazil show small angular variations and relatively steady paleointensity, contrasting with the fast variations observed in younger speleothems from the same region.
NATURE COMMUNICATIONS
(2022)
Article
Environmental Sciences
Leonard O. Ohenhen, Joshua M. Feinberg, Lee D. Slater, Dimitrios Ntarlagiannis, Isabelle M. Cozzarelli, Miriam Rios-Sanchez, Carl W. Isaacson, Alexis Stricker, Estella A. Atekwana
Summary: Iron mineral transformations are linked to the biodegradation of hydrocarbons, and magnetic susceptibility measurements are useful for monitoring the natural attenuation of hydrocarbons. However, certain magnetic susceptibility perturbations remain poorly understood, and the characteristics of iron mineral phases associated with these perturbations are largely unknown, requiring further research.
JOURNAL OF GEOPHYSICAL RESEARCH-BIOGEOSCIENCES
(2022)
Article
Chemistry, Multidisciplinary
Jeanette L. Voelz, Kathryn K. Hobart, Kaelyn A. Stahovich, Haleigh E. Ziebol, Nathan A. Harper, Joshua M. Feinberg, William A. Arnold, R. Lee Penn
Summary: The reactivity of ultrafine mineral particles during the oxidation process of adsorbed Fe(II) is influenced by the addition of organic carbon, leading to changes in the formation and morphology of goethite and hematite.
ACS EARTH AND SPACE CHEMISTRY
(2022)
Article
Geosciences, Multidisciplinary
John R. McDaris, Joshua M. Feinberg, Anthony C. Runkel, Jonathan Levine, Sophie Kasahara, E. Calvin Alexander
Summary: This study presents a comprehensive overview of historic chloride concentrations in the groundwater of Twin Cities metropolitan area in Minnesota. The findings indicate that chloride contamination, primarily caused by deicing salt application to roadways, is widespread. The study also highlights the potential future risks, with chloride concentrations expected to exceed regulatory thresholds if the current imbalance between inputs and outflows persists.
Article
Geochemistry & Geophysics
R. Doctor, J. M. Feinberg
Summary: Measurements of susceptibility as a function of temperature are a standard method in quantifying a sample's magnetic mineralogy. The High Temperature Susceptibility Bridge (HTSB) can be used for simple differential thermal analysis to identify phase transitions and exo-/endothermic reactions. This approach expands the utility of HTSBs and can provide valuable information about the sample's phase transitions.
JOURNAL OF GEOPHYSICAL RESEARCH-SOLID EARTH
(2022)
Article
Microbiology
Kathryn K. Hobart, Zhaazhaawaanong Greensky, Kimberly Hernandez, Joshua M. Feinberg, Jake V. Bailey, Daniel S. Jones
Summary: Microbial communities in the Duluth Complex have implications for evaluating the reclamation of mine waste and show differences in microbial composition across different environments.
ENVIRONMENTAL MICROBIOLOGY
(2023)
Article
Geography, Physical
Beth A. Fisher, Kyungsoo Yoo, Anthony K. Aufdenkampe, Edward A. Nater, Joshua M. Feinberg, Jonathan E. Nyquist
Summary: The specific surface area (SSA) of minerals increases as they weather and restructure into secondary minerals. SSA is an important property that affects soil processes such as water-holding capacity and nutrient availability. Our measurements of SSA in two 21 m deep profiles revealed that a small percentage of secondary oxide minerals contributed significantly to the total SSA. The transition in SSA occurred at 3 m depth and coincided with the presence of secondary iron oxide minerals and secondary phyllosilicates.
EARTH SURFACE DYNAMICS
(2023)
Article
Geochemistry & Geophysics
Joshua M. Feinberg, Kathleen R. Johnson
Summary: Caves exhibit diverse morphologies that provide clues to their formation mechanisms, while their iconic mineral features carry rich paleoenvironmental information. Recent studies have shown significant advancements in the ability to decode these paleoenvironmental proxies, as well as dramatic progress in extending high-resolution records further back in geological time. Cave research is addressing an increasing range of geoscience problems, from determining the timing and mechanisms of climate change to uncovering detailed records of field behavior.
Article
Geochemistry & Geophysics
Joshua M. Feinberg, Kathryn K. Hobart
Summary: The magnetism in stalagmites and flowstone can be used to chronicle high-resolution geomagnetic behavior and environmental change, originating from soils and other forms of magnetic minerals. These magnetic minerals become aligned with Earth's magnetic field before being fixed within the speleothem.
Article
Geochemistry & Geophysics
Lingyu Zhang, Kristoffer Szilas
Summary: This study presents new petrological and geochemical data for the Narssaq Ultramafic Body (NUB) in the Itsaq Gneiss Complex of SW Greenland. The results indicate that the ultramafic rocks of NUB are not mantle residues, but instead represent crustal cumulates derived from high-Mg magmas.
EARTH AND PLANETARY SCIENCE LETTERS
(2024)
Article
Geochemistry & Geophysics
Rong Xu, Sarah Lambart, Oliver Nebel, Ming Li, Zhongjie Bai, Junbo Zhang, Ganglan Zhang, Jianfeng Gao, Hong Zhong, Yongsheng Liu
Summary: This study investigated the iron isotope compositions of Cenozoic basalts in Southeast China, finding significant variations related to different types of basalts and their respective sources.
EARTH AND PLANETARY SCIENCE LETTERS
(2024)
Article
Geochemistry & Geophysics
C. J. Ebinger, Miriam C. Reiss, Ian Bastow, Mary M. Karanja
Summary: The East African rift system is formed above mantle upwellings and the formation of rifts is related to lithospheric thinning and magmatic activity. The amount of splitting varies spatially and the fast axes are predominantly parallel to the orientation of the rifts. Thick lithospheric modules have less splitting and different orientations, which may indicate mantle plume flow. Splitting rotates and increases in strength as it enters the rift zones, suggesting that the anisotropy is mainly present at shallow depths.
EARTH AND PLANETARY SCIENCE LETTERS
(2024)
Correction
Geochemistry & Geophysics
Ekaterina Rojas-Kolomiets, Owen Jensen, Michael Bizimis, Gene Yogodzinski, Lukas Ackerman
EARTH AND PLANETARY SCIENCE LETTERS
(2024)
Article
Geochemistry & Geophysics
Robert W. Nicklas, Igor S. Puchtel, Ethan F. Baxter
Summary: Oxygen fugacity is a fundamental parameter for understanding redox processes in igneous systems. This study compares the Fe-XANES oxybarometry method with the V-in-olivine method for evaluating fO(2) in MORB lavas. The results show that the V-in-olivine method is not applicable to samples with low MgO content, and that the majority of Archean komatiite sources have lower fO(2) than modern MORB.
EARTH AND PLANETARY SCIENCE LETTERS
(2024)
Article
Geochemistry & Geophysics
Chunfei Chen, Stephen F. Foley, Sebastian Tappe, Huange Ren, Lanping Feng, Yongsheng Liu
Summary: The volatile components CO2 and H2O play a major role in mantle melting and heterogeneity. In this study, Ca isotopes were used to trace the lithological heterogeneity in alkaline magmatic rocks. The results revealed the presence of K-richterite and carbonate components as the source of alkaline magmas with low delta 44/40Ca values. These findings highlight the importance of Ca isotopes as a robust tracer of lithological variation caused by volatiles in the Earth's upper mantle.
EARTH AND PLANETARY SCIENCE LETTERS
(2024)
Article
Geochemistry & Geophysics
Timothee Jautzy, Gilles Rixhon, Regis Braucher, Romain Delunel, Pierre G. Valla, Laurent Schmitt, Aster Team
Summary: Although the current approach to estimate catchment-wide denudation rates using only 10Be concentrations has made significant progress in geomorphology, this study argues for the inclusion of 26Al measurements and testing of steady-state assumptions in slow eroding, formerly glaciated landscapes. The study conducted measurements of both 10Be and 26Al in stream sediments from the Vosges Massif in France and found that elevation, slope, channel steepness, and precipitation were the primary factors controlling denudation rates. The study also revealed a significant relationship between the extent of past glaciation and the cosmogenic (un-)steadiness in the stream sediments.
EARTH AND PLANETARY SCIENCE LETTERS
(2024)
Article
Geochemistry & Geophysics
Erik van der Wiel, Douwe J. J. van Hinsbergen, Cedric Thieulot, Wim Spakman
Summary: Numerical models of Earth's mantle dynamics can predict the vigour and mixing of mantle flow, and the average slab sinking rates are an unexplored parameter that can provide intrinsic information on these characteristics. Through numerical experiments, it has been found that slab sinking rates are strongly correlated with mantle convection and mixing, and may explain geochemical observations from hotspot volcanoes.
EARTH AND PLANETARY SCIENCE LETTERS
(2024)