Article
Environmental Sciences
Jianwei Lin, Weijie Xiang, Yanhui Zhan
Summary: The characteristics and mechanism of phosphate adsorption onto magnetite, hematite, and goethite were comparatively studied, and it was found that magnetite has a higher adsorption capacity. Additionally, the amendment and capping materials of magnetite, hematite, and goethite can effectively suppress the release of endogenous phosphorus from sediment into the overlying water.
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2023)
Article
Environmental Sciences
Jianwei Lin, Weijie Xiang, Yanhui Zhan
Summary: The characteristics and mechanism of phosphate adsorption onto magnetite, hematite and goethite were studied, and the effects of magnetite, hematite and goethite amendment and capping on endogenous phosphorus (P) liberation from sediment into overlying water (OW) were investigated. The adsorption of phosphate onto magnetite, hematite and goethite followed the inner-sphere complexation mechanism, and the phosphate adsorption capacity decreased in the order of magnetite>goethite>hematite. The magnetite, hematite and goethite amendment can all decrease the risk of endogenous P release into OW, with magnetite being the most effective.
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2023)
Article
Polymer Science
Dimace Lionel Vofo Ngnintedem, Marco Lampe, Herve Kouamo Tchakoute, Claus Henning Ruescher
Summary: The current study investigates the influence of iron minerals on the properties of geopolymer materials. The additions of hematite, magnetite, and goethite remain largely unreacted in the binder, affecting the compressive strength. The presence of voids and cracks in the micrographs of geopolymer materials is related to the gel formation and the interaction between the gel and crystalline additions.
Article
Environmental Sciences
Hem Chandra Sharma, Hao Chen, Aneesh Kumar Chandel
Summary: This study investigates the use of modified biochar with iron minerals for the adsorption and degradation of organic contaminants. The results show that the modified biochar has better sorption ability and higher persulfate activation capacity, leading to enhanced removal of the target contaminant.
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2022)
Article
Metallurgy & Metallurgical Engineering
John Demol, Elizabeth Ho, Karin Soldenhoff, Inna Karatchevtseva, Gamini Senanayake
Summary: The addition of iron minerals to the monazite acid bake process significantly increased the leaching of rare earth elements and thorium, especially at temperatures above 300 degrees C. The presence of iron minerals led to the formation of an amorphous and insoluble iron sulfate-polyphosphate type phase, which enhanced the dissolution of rare earth elements and thorium compared to monazite alone.
Article
Geosciences, Multidisciplinary
Xuan Lyu, Zhifei Liu, Qiong Wu, Christophe Colin, Xun Yu, Chuanlian Liu, Qianyu Li
Summary: This study investigates the iron oxide mineral content and major element compositions of oceanic red beds in the South China Sea to understand the Miocene deep-sea oxidation environment and its interaction with the western Pacific. The results show a correlation between the hematite and goethite content and the color reflectance, indicating that the reddish-brown color of the Miocene oceanic red beds is a result of a mixture of hematite and goethite. The occurrence of these minerals suggests an oxic bottom water environment with a low sedimentation rate in the South China Sea.
FRONTIERS IN EARTH SCIENCE
(2022)
Review
Anthropology
Georgios P. Mastrotheodoros, Konstantinos G. Beltsios
Summary: Natural ochres, ranging in color from yellow to deep red and brown, have been widely used for decorative, artistic, and medicinal purposes since prehistoric times. This paper provides an overview of the range, composition, origin, properties, and potential processing of natural ochre pigments, as well as the production and processing of artificial ochres. It also discusses analytical techniques for ochres' identification and provenancing, along with guidelines for good practice, and offers insights on ochres' potential applications and limitations, including a discussion on ochres in the Greco-Roman world.
ARCHAEOLOGICAL AND ANTHROPOLOGICAL SCIENCES
(2022)
Article
Geochemistry & Geophysics
Wentao Huang, Shanshan Niu, Mark J. Dekkers, Peter C. Lippert, Dario Bilardello, Peat Solheid, Bo Zhang, Guillaume Dupont-Nivet, Douwe J. J. van Hinsbergen, Lin Ding
Summary: Paleomagnetic investigations of Paleocene lavas from Dianzhong Formation in Linzhou basin of southern Lhasa terrane are essential for determining the timing and paleolatitude of the initial India-Asia collision. However, controversy exists regarding the preservation of primary remanent magnetization in these rocks. This study finds that hydrothermal alteration has significantly impacted the original magnetic carrier, resulting in the contamination or replacement of the primary remanence by thermoviscous and chemical remanent magnetizations.
JOURNAL OF GEOPHYSICAL RESEARCH-SOLID EARTH
(2023)
Article
Green & Sustainable Science & Technology
Xiao Zhou, Guihua Liu, Tiangui Qi, Jiasheng Zhao, Zhihong Peng, Yilin Wang, Leiting Shen
Summary: The surface magnetization technique can improve the efficiency of iron recovery from high-iron red mud. Increasing the temperature and NaOH concentration can enhance the iron recovery, while prolonging magnetization time has a negative effect. Coarse particles in the red mud contribute to higher iron recovery and total iron content in the concentrate.
JOURNAL OF SUSTAINABLE METALLURGY
(2023)
Review
Geochemistry & Geophysics
Wang He, Zhijun Yang, Hengheng Du, Jintao Hu, Ke Zhang, Weisheng Hou, Hongwei Li
Summary: Continental red beds are sedimentary rocks and sediments with red color. This paper reviews the composition and color properties of red beds, analyzes the existence and distribution of authigenic hematite, and summarizes the iron sources and formation of hematite. The fading phenomenon observed in red beds is introduced, along with possible research directions for future red bed-related issues.
Article
Materials Science, Multidisciplinary
Liming Lu, James Manuel
Summary: The assessment of Mamba (MM) ores showed that adding hydrated lime improved granule morphology, strength, and bed permeability. Additionally, both blends had similar sintering characteristics, but as coke addition increased, the sinter return ratio needed to decrease to achieve balance in sinter return.
Article
Soil Science
Lulu Zhao, Qian Fang, Thomas J. Algeo, Anhuai Lu, Ke Yin, Zhenggang Duan, Hanlie Hong
Summary: Comparative analysis of iron and clay mineralogy, magnetic properties, VNIR spectral behavior, and chemical weathering between plinthic and homogeneous soils in QRSs in southern China revealed differences in weathering intensity and mineral composition, suggesting that pedogenic processes play a key role in the formation of plinthic soils. The formation of plinthic soils in QRSs is influenced by seasonal redox fluctuations and aridification during glacial stages, highlighting the importance of understanding pedogenesis and mineral transformation in tropical/subtropical regions.
Article
Geochemistry & Geophysics
Heng Wang, Zhen-Yu Yang, Liu-Zeng Jing, Ya-Bo Tong, Xian-Qing Jing
Summary: To understand the tectonic evolution and rotations of crustal material in the southeastern Tibetan Plateau, a paleomagnetic study was conducted on Cretaceous red beds in the Binchuan and Xiangyun sections. Results showed the presence of two types of hematite, with pigmentary hematite carrying syn-folding remanent magnetizations. The rotations of the Binchuan and Xiangyun sections since the early Cretaceous were estimated to be 20.5 +/- 5.3 degrees clockwise and 9.9 +/- 4.6 degrees counterclockwise, respectively, suggesting differential rotations in close proximity.
Article
Geochemistry & Geophysics
Wang He, Zhijun Yang, Jintao Hu, Ke Zhang, Hongwei Li
Summary: This study investigated the characteristics, distribution, and mineral composition of the Danxia Formation. The results showed that the reddish-brown mineral is primarily composed of fine hematite with traces of goethite, while the reddish-purple mineral consists solely of fine hematite. The reddening of the Danxia Formation occurs during diagenesis, and the vertical color variations are not related to paleoclimate records but rather the result of sediment source differentiation.
Article
Geosciences, Multidisciplinary
Xianqiang Meng, Gen K. K. Li, Xiaoyong Long, Shilei Li, Junfeng Ji
Summary: A new method for measuring soil goethite/hematite ratios is presented, which utilizes the band position of electron pair transition (EPT) in diffuse reflectance spectra processed by continuum removal. The method is validated and shown to effectively eliminate the matrix effect. Application of the method to loess-paleosol sequences confirms its potential for improving the measurement of goethite/hematite ratios in sediments.
GEOPHYSICAL RESEARCH LETTERS
(2023)
Article
Geochemistry & Geophysics
Annika Greve, Myriam Kars, Mark J. Dekkers
Summary: Understanding the locus of fluid flow along thrust and splay faults is crucial for comprehending the hydraulic properties of accretionary systems and fault mechanics. In this study, rock magnetic techniques were used to identify enhanced magnetic mineral alteration within the Papaku fault, revealing changes within the main brittle fault zones and subsidiary fault zones. The secondary magnetic mineral diagenesis was likely driven by anaerobic methane oxidation, with sediments acting as a barrier to prevent upward fluid flow through the fault zone.
JOURNAL OF GEOPHYSICAL RESEARCH-SOLID EARTH
(2021)
Article
Geology
Xiangjiang Yu, Zhaojie Guo, Yan Chen, Xiang Cheng, Wei Du, Zhendong Wang
Summary: The offlap process in endorheic basins is controlled by newborn faults or new isostatic flexures inside the previous basin margin. Interpretation of seismic reflection profiles of the Qaidam basin reveals that the rigid Qaidam block was gradually broken during the India-Eurasian collision, and the plateau expanded progressively from pre-existing mountains to basins.
INTERNATIONAL GEOLOGY REVIEW
(2022)
Article
Geology
Xiang Cheng, Zhaojie Guo, Yan Chen, Xiangjiang Yu, Wei Du, Jiawei Wu, Haifeng Wang, Caifang Wu
Summary: The Yingxiong Range is the largest anticlinal belt within the triangular overlapping zone between the Altyn Tagh Fault and the Eastern Kunlun Fault, recording critical structural formation information. It is mainly controlled by NE-dipping low-angle thrust faults and deep-level faults with complex fracture systems of different orientations.
INTERNATIONAL GEOLOGY REVIEW
(2022)
Article
Geosciences, Multidisciplinary
Wenbin Tang, Xiaojun Wang, Xuguang Guo, Wenjun He, Yong Tang, Georgia Pe-Piper, David J. W. Piper, Zhaojie Guo, Feng Cheng, Wei Li, Yuanyuan Zhang
Summary: This study investigates the interlinkage between tectono-stratigraphy, detrital zircon U-Pb dating, and magmatism in the Junggar terranes during ocean closure. It suggests that the formation of back-arc basins and the closure of oceans are closely related processes. The study also reveals that asthenospheric upwelling in the back-arc area was triggered by subduction but continued after subduction had ceased. The rapid generation of continental crust was facilitated by crustal thinning, high thermal gradient, decompression melting, and magma pathways along strike-slip faults.
INTERNATIONAL JOURNAL OF EARTH SCIENCES
(2022)
Review
Geochemistry & Geophysics
Zhaoxia Jiang, Qingsong Liu, Andrew P. Roberts, Mark J. Dekkers, Vidal Barron, Jose Torrent, Sanzhong Li
Summary: Hematite is a common canted antiferromagnetic mineral with a reddish color. Its identification and quantification can be conveniently achieved through magnetic and color properties. Understanding hematite's characteristics and content is crucial for studies of the iron cycle, paleoenvironmental evolution, and research on Mars. However, previous research mainly focuses on stoichiometric hematite, neglecting the effects of cation substitution. Remagnetization is another complex problem associated with hematite. Recognizing the properties of cation-substituted hematite and understanding remagnetization mechanisms are important for identifying and interpreting the magnetic signals carried by hematite.
REVIEWS OF GEOPHYSICS
(2022)
Editorial Material
Geochemistry & Geophysics
Isabelle Manighetti, Rachel Abercrombie, Yehuda Ben-Zion, Yves Bernabe, Michael Bostock, Mark J. Dekkers, Satoshi Ide, Stephen W. Parman, Douglas R. Schmitt, Paul Tregoning
Summary: The editors of JGR-Solid Earth express their appreciation to those who served as peer reviewers for the journal in 2021.
JOURNAL OF GEOPHYSICAL RESEARCH-SOLID EARTH
(2022)
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
Geochemistry & Geophysics
Tao Yang, Mark J. Dekkers, Xixi Zhao, Katerina E. Petronotis, Yu-Min Chou
Summary: This study provides insights into a novel pathway of greigite formation controlled by turbidites and bioturbation. The research also suggests that early diagenetic greigite can preserve primary (quasi-)syn-sedimentary magnetic records.
JOURNAL OF GEOPHYSICAL RESEARCH-SOLID EARTH
(2022)
Editorial Material
Geochemistry & Geophysics
Wentao Huang, Peter C. Lippert, Peter W. Reiners, Jay Quade, Paul Kapp, Morgan Ganerod, Zhaojie Guo, Douwe J. J. van Hinsbergen
Summary: In their comment, Zhao et al. question the reliability of our thermochronologic data and the existence of hydrothermal events in the Linzizong Group. They argue that their observations and paleomagnetic studies indicate the preservation of primary igneous textures. However, our reply provides more evidence and analyses that contradict their claims, highlighting the systematic resetting of records due to hydrothermal events.
EARTH AND PLANETARY SCIENCE LETTERS
(2023)
Article
Geology
Xiangjiang Yu, Zhaojie Guo, Shu-wei Guan, Wei Du, Zhendong Wang, Jiawei Wu, Yizhou Yang, Kexin Yi, Luying Peng
Summary: The Jurassic period in the Qaidam Basin is important for the generation of hydrocarbon source rocks and coals, but previous explorations have failed due to limited understanding of its distribution. This study analyzes drilling wells and seismic data and finds a rift tectonic setting with discontinuous deposition and rapid facies transition during the Jurassic. Further exploration should focus on delineating the distribution of the Jurassic rift system and recovering complex Cenozoic tectonic overprinting.
INTERNATIONAL GEOLOGY REVIEW
(2022)
Article
Geosciences, Multidisciplinary
Liao Chang, Zhaowen Pei, Pengfei Xue, Shishun Wang, Zhaoping Wang, Wout Krijgsman, Mark J. J. Dekkers
Summary: This study investigates the origin of multipolarity in Miocene greigite-bearing sediments using electron microscopic and magnetic analyses. It is found that there is a magnetic softening and partial transformation of iron sulfides to magnetite and pyrrhotite in the sediments, leading to the change from single polarity to multipolarity. A new greigite self-reversal model is proposed to explain the commonly observed antiparallel polarities, which has significant implications in geochronology, tectonics, and paleoenvironment.
GEOPHYSICAL RESEARCH LETTERS
(2023)
Article
Geochemistry & Geophysics
Wentao Huang, Shanshan Niu, Mark J. Dekkers, Peter C. Lippert, Dario Bilardello, Peat Solheid, Bo Zhang, Guillaume Dupont-Nivet, Douwe J. J. van Hinsbergen, Lin Ding
Summary: Paleomagnetic investigations of Paleocene lavas from Dianzhong Formation in Linzhou basin of southern Lhasa terrane are essential for determining the timing and paleolatitude of the initial India-Asia collision. However, controversy exists regarding the preservation of primary remanent magnetization in these rocks. This study finds that hydrothermal alteration has significantly impacted the original magnetic carrier, resulting in the contamination or replacement of the primary remanence by thermoviscous and chemical remanent magnetizations.
JOURNAL OF GEOPHYSICAL RESEARCH-SOLID EARTH
(2023)
Article
Geochemistry & Geophysics
Mark J. Dekkers, Wout Hanckmann, Simo Spassov, Thilo Behrends
Summary: Siderite is an important sink for iron in the geochemical cycling of iron, but its detection is challenging due to its fine-grained nature and low concentrations. This study explores the potential of low-temperature magnetometry for analyzing siderite. The results show that the presence of siderite can be best diagnosed by evaluating a combination of heating curves and the remanence ratio.
GEOCHEMISTRY GEOPHYSICS GEOSYSTEMS
(2023)
Editorial Material
Geochemistry & Geophysics
Isabelle Manighetti, Rachel Abercrombie, Yves Bernabe, Michael Bostock, Mark J. Dekkers, Satoshi Ide, Douglas R. Schmitt, Shin-Chan Han, Paul Tregoning
Summary: The editors of JGR-Solid Earth express their gratitude to the peer reviewers who contributed in reviewing articles for the journal in 2022.
JOURNAL OF GEOPHYSICAL RESEARCH-SOLID EARTH
(2023)
