Article
Geosciences, Multidisciplinary
Zhi Liu, Xuelian Guo, Xiuming Liu, Slobodan B. Markovic
Summary: A systematic comparison of the magnetic properties of loess in northern China and northern Serbia was conducted, revealing differences in the contents and domain states of magnetic minerals between the two regions. Factors such as source distances of aeolian dust, pedogenesis, and climatic conditions contribute to the variations in magnetic properties and magnetic mineral contents.
Article
Geosciences, Multidisciplinary
Zhi Liu, Xiuming Liu, Slobodan B. Markovic, Bin Lu, Ruina He
Summary: The changing pattern of magnetic characteristics in eastern European loess deposits is similar to that of the Chinese Loess Plateau. A study on the rock magnetism of loess in northern Serbia provides insights into the magnetic records since late Middle Pleistocene. The results show some differences in magnetic characteristics between the two regions, but similar distributions of magnetic particles. The increasing trend of maghemite content in the Titel loess-paleosol sequence is likely a response to the enhancement of continental climate.
SCIENCE CHINA-EARTH SCIENCES
(2022)
Article
Geosciences, Multidisciplinary
Xiaoxue Wang, Junsheng Nie, Thomas Stevens, Haobo Zhang, Wenjiao Xiao
Summary: Considerable debate exists regarding the variation of the East Asian summer monsoon (EASM) during the late Miocene. Based on loess magnetic susceptibility (xlf) records from the Chinese Loess Plateau (CLP), this study found that the xlf patterns during the late Miocene differ from the modern monsoon climate pattern. By proposing a hypothesis and conducting research, the study concludes that the xlf data from the eastern CLP more accurately reflect the intensity of the EASM during the late Miocene.
EARTH-SCIENCE REVIEWS
(2022)
Article
Geography, Physical
Yuechen Lian, Xiuming Liu, Ali Rashid Tabrez, Xuegang Mao, Mingming Ma, Xinyao Qi, Shengfang Zhou
Summary: This paper presents a systematic study of environmental magnetism and geochemical elements in the loess-paleosol sequence of the Attock area in northern Pakistan, exploring the significance and limitation of magnetic susceptibility as a proxy index of paleoclimate and the variation mechanism of magnetic susceptibility. The results showed that the composition and content of magnetic minerals varied between the loess layer and paleosol layer, and the relationship between magnetic susceptibility and climate was complex. Additionally, certain geochemical elements were found to be good indicators of paleoclimatic variation in this area.
QUATERNARY INTERNATIONAL
(2022)
Article
Geosciences, Multidisciplinary
B. Bradak, D. Csonka, A. Novothny, J. Szeberenyi, A. Medvedova, P. Rostinsky, K. Feher, G. Barta, T. Vegh, K. Kiss, M. Megyeri
Summary: The geomorphological characteristics of loess succession at Male nad Hronom in Slovakia provide a valuable opportunity to investigate differences in soil formation in various topographic positions. The study revealed differences in soil formation dynamics along the slope, with paleosols in lower slope positions showing signs of quasi-constant sediment input. The climate conditions of the last interglacial and Late Pleistocene played a significant role in pedogenesis, with MIS 3 climate favoring intense dust accumulation. Despite erosion events, the sequence affected by sediment input in lower slope positions preserved soil horizons intact.
Article
Geosciences, Multidisciplinary
Qiang Zhang, Qingsong Liu, Andrew P. Roberts, Jimin Yu, Yan Liu, Jinhua Li
Summary: The study demonstrates that Asian dust delivered iron to stimulate primary productivity and boost magnetotactic bacteria biomineralization in the late Miocene in the North Pacific Ocean. However, since the late Pliocene, dust inputs and primary productivity appear to have been decoupled, with magnetotactic bacteria activity mainly controlled by primary productivity.
GEOPHYSICAL RESEARCH LETTERS
(2021)
Article
Geosciences, Multidisciplinary
Zhuo-Dong Jiang, Qiu-Bing Wang, Zamir Libohova, Kabindra Adhikari, Kristofor R. Brye, Zhong-Xiu Sun, Fu-Jun Sun, Ying-Ying Jiang, Phillip R. Owens
Summary: This study investigated the distribution of Fe-Mn concentrations in upland loess soils in mid-continental North America, identifying annual precipitation and temperature as key climatic factors influencing the occurrence of Fe-Mn concentrations. Results also highlighted the importance of soil properties in the occurrence of Fe-Mn concentrations in the landscape, showing a complex interaction with climatic factors.
Article
Environmental Sciences
Jianwu Li, Yucheng Ren, Fangfang Zhang, Yongfu Li, Yunying Fang, Xudong Wang, Li Ruan, Zhengqian Ye
Summary: The study found that Asian dust significantly contributes to subtropical soils in China, with a high mass fraction of dust-derived Nd in the soils. Nd isotopes are powerful fingerprints in tracing the origin of soil materials.
JOURNAL OF SOILS AND SEDIMENTS
(2021)
Article
Geography, Physical
Balazs Bradak, Yusuke Seto, Thomas Stevens, Gabor Ujvari, Katalin Feher, Chiara Koltringer
Summary: Magnetic susceptibility measurements, such as low field and frequency-dependent magnetic susceptibility, are widely used in reconstructing terrestrial paleo-climate, with common models based on pedogenic magnetic enhancement and windvigour. However, increasing cases show unusual relationships between these two common loess magnetic susceptibility proxies, indicating limited knowledge about the occurrence and potential causes of the unusual behavior of magnetic susceptibility parameters.
PALAEOGEOGRAPHY PALAEOCLIMATOLOGY PALAEOECOLOGY
(2021)
Article
Geosciences, Multidisciplinary
Ji Young Shin, Kiseong Hyeong, Wonnyon Kim
Summary: The study reveals that the main components of eolian dust in the central North Pacific sediments are biogenic magnetite and detrital magnetic minerals, with the concentration of detrital magnetic minerals showing a long-term increase trend since about 1 million years ago. In particular, there is a significant increase in concentration around 0.8-0.7 million years ago, indicating enrichment of magnetic minerals in detrital sediment.
FRONTIERS IN EARTH SCIENCE
(2021)
Article
Geosciences, Multidisciplinary
Rong Liu, Dapeng Yue, Jingbo Zhao, Hao Shi, Xiaoning Wang, Yan Zhao, Yuzhe Yang
Summary: Research on Quaternary climate change can provide insights into the changes in physico-mechanical properties of loess-paleosol sequences (LPS), which are significant for engineering and construction activities. This study focused on a well-preserved LPS in the sandy loess belt of China and investigated its physico-mechanical properties using climate proxies. The results revealed vertical variations in the properties, reflecting multiple climate change events in the Middle to Late Quaternary.
Article
Soil Science
Lulu Zhao, Hanlie Hong, Thomas J. Algeo, Chen Liu, Anhuai Lu
Summary: This study used spectral data to predict pedogenesis-related soil properties in a loess sequence in China and improved the model predictions using sensor-fusion techniques. The results demonstrate the potential of spectral proxies and the sensor-fusion method for studying pedogenic evolution.
EUROPEAN JOURNAL OF SOIL SCIENCE
(2022)
Article
Environmental Sciences
Yuyang Zhao, Qiang Sun, Weizhen Li, Shaofei Wang, Yue Meng, Xiaofei Wang
Summary: Coal fires generated by the self-combustion of coal seams can significantly affect the properties of surrounding rock and soil. This study investigates the effects of high temperatures on loess in Northern Shaanxi, China by heat treating loess samples at different temperatures. The results show significant changes in magnetic susceptibility and chromaticity, which are attributed to the thermal-induced transformation of ferromagnetic minerals and the depth of loess burial.
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2022)
Article
Soil Science
Luis Antonio Coutrim dos Santos, Fabricio de Araujo Pedron, Valdomiro Severino de Souza Junior, Laercio Santos Silva, Milton Cesar Costa Campos, Jane Kelly Silva Araujo
Summary: The contribution of Fe oxides in Indian Black Earth, Indian Brown Earth and non-anthropogenic soils in the Southern region of Amazonia was evaluated. Antiferromagnetic oxides hematite and goethite were identified using diffuse reflectance spectroscopy. The presence of magnetite and maghemite was inferred through magnetic susceptibility measurements. The combined analysis of spectral curves and magnetic susceptibility is useful for soil survey in the Amazonia.
Article
Geography, Physical
Namier Namier, Xinbo Gao, Qingzhen Hao, Slobodan B. Markovic, Yu Fu, Yang Song, Huandi Zhang, Xuechao Wu, Chenglong Deng, Milivoj B. Gavrilov, Zhengtang Guo
Summary: This study conducted a detailed mineral magnetic investigation of loess-paleosol couplets in Serbia, revealing changes in ferrimagnetic mineral assemblage with increasing pedogenesis. The results provide an improved basis for using Serbian loess deposits for paleoclimatic reconstruction.
QUATERNARY RESEARCH
(2021)
Article
Geography, Physical
Sanda Balescu, Diana Jordanova, Laurence Forget Brisson, Francois Hardy, Sebastien Huot, Michel Lamothe
QUATERNARY INTERNATIONAL
(2020)
Article
Archaeology
Deyan Lesigyarski, Neli Jordanova, Maria Kostadinova-Avramova, Elena Bozhinova
GEOARCHAEOLOGY-AN INTERNATIONAL JOURNAL
(2020)
Article
Geochemistry & Geophysics
Neli Jordanova, Diana Jordanova, Emilia Tcherkezova, Hristo Popov, Antonia Mokreva, Plamen Georgiev, Ruslan Stoychev
GEOCHEMISTRY GEOPHYSICS GEOSYSTEMS
(2020)
Article
Geosciences, Multidisciplinary
Diana Jordanova, Neli Jordanova, Dimo Dimov, Bozhurka Georgieva, Daniel Ishlyamski
Summary: This study investigates the mineral magnetic signature of soil samples from Livingston Island and identifies the major contributing factors to soil formation. The results indicate the presence of titanomagnetite fractions and fine-grained magnetite in the soils, which are attributed to tephra input from nearby Deception Island. The geochemical analysis also reveals differences between the composition of soils and main rock lithologies, suggesting the influence of tephra weathering in the cold polar climate.
Article
Geography, Physical
Diana Jordanova, Christian Laag, Neli Jordanova, France Lagroix, Bozhurka Georgieva, Daniel Ishlyamski, Yohan Guyodo
Summary: Loess-paleosol sequences from the Lower Danube area provide valuable records of environmental change in SE Europe during the Pleistocene. A 27-meter thick sequence consisting of seven loess units and six interbedded paleosol complexes has been sampled in Central North Bulgaria, capturing the last 800 kyrs of environmental history.
GLOBAL AND PLANETARY CHANGE
(2022)
Article
Geography, Physical
Diana Jordanova, Bozhurka Georgieva, Neli Jordanova, Yohan Guyodo, France Lagroix
Summary: This study obtained records of paleomagnetic direction and relative paleointensity to build an age model for climate change during the Holocene period in NE Bulgaria. It found an increase in flood intensities during the late Holocene and identified six major cold incidents, with the most significant one occurring 4,500 years ago. The results highlight the sensitivity of climate in SE Europe to changes in North Atlantic circulation.
QUATERNARY INTERNATIONAL
(2022)
Article
Geosciences, Multidisciplinary
Neli Jordanova, Antonia Mokreva, Diana Jordanova, Emilia Tcherkezova, Velimira Stoyanova
Summary: A new mineral magnetic indicator of soil's quality is proposed in this study, which can be used to assess soil contamination. The study found that soil magnetism reflects sensitively the impact of factors such as vehicle traffic and foot load. The strong positive correlation between magnetic parameters and potentially toxic elements (PTEs) was validated by geochemical analysis.
Article
Archaeology
Neli Jordanova, Diana Jordanova, Deyan Lesigyarski, Maria Kostadinova-Avramova
JOURNAL OF ARCHAEOLOGICAL SCIENCE-REPORTS
(2020)
Article
Geosciences, Multidisciplinary
Denis-Didier Rousseau, Pierre Antoine, Niklas Boers, France Lagroix, Michael Ghil, Johanna Lomax, Markus Fuchs, Maxime Debret, Christine Hatte, Olivier Moine, Caroline Gauthier, Diana Jordanova, Neli Jordanova
CLIMATE OF THE PAST
(2020)
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)