Article
Geography, Physical
Dongyang Liu, Chunju Huang, James G. Ogg, David B. Kemp, Mingsong Li, Meiyi Yu, William J. Foster
Summary: The study conducted a cyclostratigraphic analysis of a Middle Triassic marine platform succession in South China, revealing significant cycles in elemental proxies and lithofacies. By establishing a new astronomical time scale, the age of Anisian environment and the timing of early marine ecosystem recovery were determined, with possible deoxygenation events identified during the Anisian period.
PALAEOGEOGRAPHY PALAEOCLIMATOLOGY PALAEOECOLOGY
(2021)
Article
Multidisciplinary Sciences
Malte Mau, Dennis Kent, Lars B. Clemmensen
Summary: Sedimentological records are the only accessible archives for studying Earth's orbital variations in the distant geological past. A study comparing the climate response to orbital variations in a Late Triassic midlatitude temperate setting and a tropical low paleolatitude setting reveals antiphasing between the two, which has implications for global correlation of geological records.
PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA
(2022)
Article
Geosciences, Multidisciplinary
Yang Li, Renchao Yang, A. J. (Tom) van Loon, Liang Dong
Summary: This study analyzes continuous cores from the N36 well in the southern part of the Ordos Basin in China and finds a correlation between sedimentary cycles and astronomical cycles in the Mesozoic era. It uses the astronomical cycles to determine the period of sedimentary cycles, uncover climate changes, and reconstruct the depositional environments.
MARINE AND PETROLEUM GEOLOGY
(2023)
Article
Multidisciplinary Sciences
Margriet L. Lantink, Joshua H. F. L. Davies, Maria Ovtcharova, Frederik J. Hilgen, John W. Valley, Paleoproterozoic Joffre
Summary: Cyclostratigraphic analysis and high-precision U-Pb zircon dating of the lower Paleoproterozoic Joffre Member of the Brockman Iron Formation in NW Australia reveal evidence of Milankovitch forcing and provide insights into the Earth-Moon system evolution.
PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA
(2022)
Article
Geography, Physical
Dongyang Liu, Chunju Huang, David B. Kemp, Mingsong Li, James G. Ogg, Meiyi Yu, William J. Foster
Summary: This study conducted a cyclostratigraphic analysis on two shallow-marine carbonate platform sections in Guizhou, South China, revealing orbital cycles reflecting eccentricity, obliquity, and precession forcing in the Middle Triassic. Geochemical and lithological changes suggest increased terrigenous flux under a warmer and more humid climate, with possible correlation to ecological crises. The research also demonstrates the correlation of regional sea level changes with global sea level fluctuations and the utility of sedimentary noise modelling in inferring past sea level dynamics in shallow marine environments.
GLOBAL AND PLANETARY CHANGE
(2021)
Article
Geography, Physical
Juye Shi, Zhijun Jin, Quanyou Liu, Tailiang Fan, Zhiqian Gao
Summary: This study analyzed the annual laminae in carbonate rocks in the Bohai Bay Basin, revealing solar activity cycles at different scales. The findings suggest that solar activity did not significantly change during the transitional period from a greenhouse to an icehouse climate in the Eocene.
GLOBAL AND PLANETARY CHANGE
(2021)
Article
Geosciences, Multidisciplinary
Grainne R. O'Neill, Anthony J. Broccoli
Summary: The study shows that obliquity has a bigger impact on positive degree-days in Scandinavia and Baffin Island compared to precession. Additionally, snowfall in Scandinavia is dominated by obliquity while in Baffin Island it is dominated by precession.
GEOPHYSICAL RESEARCH LETTERS
(2021)
Article
Geosciences, Multidisciplinary
Ping He, Shangfeng Zhang, Enze Xu, Chunxia Zhu
Summary: This study investigates the stratigraphic cycles of the Zhujiang Formation in the Baiyun Sag, Pearl River Mouth Basin, using well log data and analysis methods. The results show that the Milankovitch cycles are well preserved in the formation, and a floating astronomical time scale is established. The study provides a high-precision quantitative method for stratigraphic division and correlation in deep-water sedimentary systems.
Article
Geology
M. Sinnesael, P. McLaughlin, A. Desrochers, A. Mauviel, J. De Weirdt, P. Claeys, T. R. A. Vandenbroucke
Summary: In this study, a high-resolution astrochronology for the Paleozoic was successfully reconstructed in the Upper Ordovician reference record of Anticosti Island, Canada. This study revealed clear astronomical cycles and highlighted the importance of recognizing complex stratigraphic hiatuses and significantly increased accumulation rates.
Article
Geography, Physical
Wentao Huang, Huaichun Wu, Qiang Fang, Shihong Zhang, Tianshui Yang, Haiyan Li, Meinan Shi
Summary: This study investigates the depositional environment and astronomically forced organic matter (OM) accumulation in the Lucaogou Formation in southern Junggar Basin, northwestern China. The results suggest that OM sequestration is a dynamically cumulative process in response to hydrological cycle and lake-level changes, and different depositional environments show different responses to climate change.
PALAEOGEOGRAPHY PALAEOCLIMATOLOGY PALAEOECOLOGY
(2022)
Article
Geosciences, Multidisciplinary
Polychronis C. Tzedakis, Eric W. Wolff
Summary: James Croll's Physical Theory of Secular Changes of Climate emerged during a revolution in geology and he believed that high eccentricity periods are associated with long glacial epochs. He understood the limitations of terrestrial records and suggested that deep-sea sediments would contain a continuous succession of glacial-interglacial cycles. Contrary to a widespread view, Croll was not envisioning palaeoceanographic exploration, but was drawing attention to the inadequacy of the land record as a testbed of his astronomical theory.
EARTH AND ENVIRONMENTAL SCIENCE TRANSACTIONS OF THE ROYAL SOCIETY OF EDINBURGH
(2021)
Article
Geochemistry & Geophysics
Rui Zhang, Vadim A. Kravchinsky, Jie Qin, Avto Goguitchaichvili, Jianxing Li
Summary: The study indicates that in the middle Eocene, aridification in the Altun Shan is associated with a cooling event in the global oxygen isotope record, a sea surface temperature record on the east Tasmanian plateau, and an aridity record in the surrounding sedimentary basins of Central Asia.
JOURNAL OF GEOPHYSICAL RESEARCH-SOLID EARTH
(2021)
Article
Geosciences, Multidisciplinary
Bianca R. Spiering, Ajani Bissick, Simon A. F. Darroch, Joshua H. F. L. Davies, Brandt M. Gibson, Galen P. Halverson, Marc Laflamme, Frederik J. Hilgen
Summary: This study examines the sedimentary variations in the middle Nama Group in southern Namibia and proposes an astronomical origin for these variations. The findings suggest that astronomical forcing may have played a role in the distribution of early complex life and provide insights into the evolutionary trends and climatic variations during the Ediacaran Period.
PRECAMBRIAN RESEARCH
(2023)
Article
Geography, Physical
Mingcai Hou, Xinchun Liu, Yang Zhang, James G. Ogg
Summary: This study focuses on the global correlation of the Late Ordovician Sandbian-Katian stage boundary and the events during this period. By analyzing sedimentary records and carbon isotopes from different regions, the researchers estimated the duration and position of the boundary and proposed the possibility of astronomical tuning.
PALAEOGEOGRAPHY PALAEOCLIMATOLOGY PALAEOECOLOGY
(2023)
Article
Geology
Michael M. Joachimski, Johann Mueller, Timothy M. Gallagher, Gregor Mathes, Daoliang L. Chu, Fedor Mouraviev, Vladimir Silantiev, Yadong D. Sun, Jinnan N. Tong
Summary: The study reconstructed the atmospheric CO2 history from the late Permian to the Early Triassic, showing a significant increase in CO2 concentrations during the warm periods, potentially contributing to the end-Permian mass extinction event.
Article
Geography, Physical
Masayuki Ikeda, Rie S. Hori, Yuki Okada, Ryoichi Nakada
PALAEOGEOGRAPHY PALAEOCLIMATOLOGY PALAEOECOLOGY
(2015)
Article
Geography, Physical
Masayuki Ikeda, Maximilien Bole, Peter O. Baumgartner
PALAEOGEOGRAPHY PALAEOCLIMATOLOGY PALAEOECOLOGY
(2016)
Article
Geography, Physical
Akihisa Kitamura, Yoko Ohashi, Hidemi Ishibashi, Yosuke Miyairi, Yusuke Yokoyama, Ryoya Ikuta, Yasuhiro Ito, Masayuki Ikeda, Taketo Shimano
QUATERNARY INTERNATIONAL
(2016)
Article
Multidisciplinary Sciences
Masayuki Ikeda, Ryuji Tada, Kazumi Ozaki
NATURE COMMUNICATIONS
(2017)
Article
Geochemistry & Geophysics
Masayuki Ikeda, Ryuji Tada
EARTH AND PLANETARY SCIENCE LETTERS
(2014)
Article
Geosciences, Multidisciplinary
Masayuki Ikeda, Ryuji Tada
EARTH PLANETS AND SPACE
(2013)
Article
Geography, Physical
Masayuki Ikeda, Rie S. Hori, Minoru Ikehara, Ren Miyashita, Masashi Chino, Kazuyoshi Yamada
GLOBAL AND PLANETARY CHANGE
(2018)
Article
Geosciences, Multidisciplinary
Hironobu Sakuma, Ryuji Tada, Masayuki Ikeda, Yuichiro Kashiyama, Naohiko Ohkouchi, Nanako O. Ogawa, Satoko Watanabe, Eiichi Tajika, Shinji Yamamoto
Article
Mineralogy
Jun Kameda, Yui Kouketsu, Mayuko Shimizu, Asuka Yamaguchi, Yohei Hamada, Mari Hamahashi, Hiroaki Koge, Rina Fukuchi, Masayuki Ikeda, Toshihiro Kogure, Gaku Kimura
JOURNAL OF MINERALOGICAL AND PETROLOGICAL SCIENCES
(2014)
Article
Geography, Physical
Kunio Kaiho, Susumu Yatsu, Masahiro Oba, Paul Gorjan, Jean-Georges Casier, Masayuki Ikeda
PALAEOGEOGRAPHY PALAEOCLIMATOLOGY PALAEOECOLOGY
(2013)
Article
Geography, Physical
Masayuki Ikeda, Rie S. Hori
PALAEOGEOGRAPHY PALAEOCLIMATOLOGY PALAEOECOLOGY
(2014)
Article
Geochemistry & Geophysics
Masayuki Ikeda, Ryuji Tada
EARTH AND PLANETARY SCIENCE LETTERS
(2020)
Article
Geochemistry & Geophysics
Kunio Kaiho, Daisuke Tanaka, Sylvain Richoz, David S. Jones, Ryosuke Saito, Daichi Kameyama, Masayuki Ikeda, Satoshi Takahashi, Md. Aftabuzzaman, Megumu Fujibayashi
Summary: The study suggests that the Central Atlantic Magmatic Province may have triggered global environmental changes and the end-Triassic mass extinction through massive gas emissions, with low-temperature heating potentially leading to SO2-dominated gas emission and global cooling that precipitated the mass extinction.
EARTH AND PLANETARY SCIENCE LETTERS
(2022)
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)