Article
Geochemistry & Geophysics
Amy C. Moser, Bradley R. Hacker, George E. Gehrels, Gareth G. E. Seward, Andrew R. C. Kylander-Clark, Joshua M. Garber
Summary: This study investigates the dating of deformation and fluid-driven recrystallization using titanite U-Pb dates, trace elements, zoning, and microstructures in a calc-silicate gneiss along the Coast shear zone. The results show that deformation microstructures enhance fluid-mediated recrystallization, but also decouple U-Pb dates from trace-element concentrations. This study demonstrates the complexity of fluid and deformation processes within and among individual grains.
CONTRIBUTIONS TO MINERALOGY AND PETROLOGY
(2022)
Article
Geochemistry & Geophysics
Meng Yu, Qiong-Xia Xia, Yong-Fei Zheng, Zi-Fu Zhao, Yi-Xiang Chen, Ren-Xu Chen, Xu Luo, Wan-Cai Li, Haijun Xu
Summary: Two generations of garnet are identified in a granite and a pegmatite in the Gangdese orogen, with the first generation representing an early nucleation stage related to magmatic-hydrothermal fluids, and the second generation crystallizing in the presence of granitic magma in the pegmatite. The granite garnets display homogeneous characteristics typical of magmatic garnets, while the pegmatite garnet's composition suggests crystallization from the same granitic magma.
AMERICAN MINERALOGIST
(2021)
Article
Geochemistry & Geophysics
Jieqi Xing, Yuhang Jiang, Haiyang Xian, Wubin Yang, Yiping Yang, Wei Tan, Hecai Niu, Hongping He, Jianxi Zhu
Summary: This study investigates the mineralization characteristics of rare earth elements in granite veins in Guizhou Province, China using multiple-scale analysis techniques. The research finds that rare earth elements are mainly enriched in quartz veins and exist in minerals at the micrometer scale, and are re-enriched by hydrothermal alteration. The results provide new insights into the mineralization mechanism and resource storage of rare earth elements.
Article
Geochemistry & Geophysics
Anthony Pochon, Giada Iacono-Marziano, Eric Gloaguen, Johann Tuduri, Saskia Erdmann
Summary: This study characterizes the alteration of the Saint-Jean-du-Doigt mafic-dominated, bimodal intrusive complex in the Armorican Massif through petrographic investigation and geochemical analysis. The findings suggest a progressive alteration process from the lower to the upper part of the intrusion, with mineralogical and chemical changes observed in plagioclase and clinopyroxene. It is proposed that the alteration is mainly caused by the interaction between the gabbroic rocks and exsolved magmatic fluids.
Article
Geochemistry & Geophysics
Abu Saeed Baidya, Atlanta Sen, Dipak C. Pal, Dewashish Upadhyay
Summary: The Khetri Copper Belt in western India likely hosts iron oxide-copper-gold mineralization, with sulfide mineralization associated with various types of alteration reflecting changing fluid composition. The presence of different pyrite vein types and their relationship with alteration suggests a complex mineralization process involving different fluid compositions.
MINERALIUM DEPOSITA
(2021)
Article
Engineering, Chemical
William Spencer, Don Ibana, Pritam Singh, Aleksandar N. Nikoloski
Summary: This study characterized ilmenite feed using various analytical techniques and examined the effects of feed properties on the quality of synthetic rutile. The research found that the BET surface area and impurity content of the feed ilmenite have a significant impact on the quality of the synthetic rutile.
MINERALS ENGINEERING
(2022)
Article
Geology
Youqiang Qi, Ruizhong Hu, Jianfeng Gao, Wei Gao, Haotian Gong
Summary: This study analyzed magnetite trace element contents from different mineralization types of the Lengshuikeng Ag-Pb-Zn deposit to understand the ore forming fluids responsible for mineralization. Two types of magnetites were identified: Type A formed early without base-metals precipitation, while Type B formed during main mineralization stages under dissolution-reprecipitation processes. Characteristics of late hydrothermal fluids indicate the ingress of Ag, Pb, and Zn occurred as metal-Cl complexes.
ORE GEOLOGY REVIEWS
(2021)
Article
Materials Science, Multidisciplinary
Sabrina Selva, Quentin Bignon, Amandine Raynal, Frantz Martin, Quentin Auzoux, Gilles Renou, Michel Tabarant, Frederic Miserque, Laurence Latu-Romain, Yves Wouters
Summary: The corrosion of titanium alloys in primary water at 300 degrees Celsius resulted in a global weight gain due to oxidation and surface precipitation, with a protective ilmenite layer finally precipitating at the surface of the samples.
Article
Geochemistry & Geophysics
Roland Hellmann, Yuanyuan Zhai, Eric Robin, Nathaniel Findling, Sathish Mayanna, Richard Wirth, Anja Schreiber, Martiane Cabie, Qingdong Zeng, Shanke Liu, Jianming Liu
Summary: Potassium feldspars are common minerals in the Earth's crust, but research on their dissolution behavior in alkaline conditions has been limited. This study used advanced analytical techniques to investigate the dissolution of orthoclase in a Ca(OH)(2)-H2O solution at high temperatures, revealing a sharp chemical reaction front and the formation of an amorphous surface alteration layer. The results suggest a coupled interfacial dissolution-reprecipitation mechanism controls the alteration of feldspars in alkaline solutions.
Article
Geochemistry & Geophysics
Daniel E. Harlov, Robert Anczkiewicz, Daniel J. Dunkley
Summary: This study shows that zircon can be replaced by new minerals or re-equilibrated zircon through dissolution-reprecipitation processes, which has important implications for understanding zircon evolution and interpretation.
GEOCHIMICA ET COSMOCHIMICA ACTA
(2023)
Article
Geology
Cameron Perks, Gavin Mudd
Summary: This study provides a comprehensive database of Ti, Zr, Hf, V, garnet and REO resources worldwide, showing that these mineral resources are sufficient to meet global demand for several decades. The research results serve as a practical reference for researchers, policymakers, and investors.
INTERNATIONAL GEOLOGY REVIEW
(2022)
Article
Geology
ZhiLin Wang, ShiXiang Li, DeRu Xu, Erke Peng, Yufei Wang, Jing Gan, BaoLiang Huang, DeXian Zhang
Summary: Typical hydrothermal cobalt deposits, such as the Hengdong deposit in Hunan Province, have significant economic potential and research value. Detailed studies on the texture, chemical composition, and sulfur isotopic composition of pyrite in the ores of the Hengdong deposit revealed that the second generation of pyrite is the major cobalt-bearing mineral, and its formation is attributed to the dissolution-precipitation mechanism during the rapid interaction of the cobalt-bearing fluid with the wall rocks and early-formed pyrite. A new model for cobalt enrichment in the deposit is proposed based on high cobalt concentrations in basement rocks and previous microthermometric measurements of fluid inclusions.
ACTA PETROLOGICA SINICA
(2023)
Article
Geochemistry & Geophysics
Mark Pearce, Angela Escolme
Summary: Replacement reactions occur during metamorphism and metasomatism in response to changes in pressure, temperature and bulk rock and fluid compositions. Understanding the phases that have previously been present in the rocks is crucial for interpreting these changes. The crystallography of replacement phases is often controlled by parent reactant phases during fluid-mediated replacement, with excessive fluid fluxing potentially leading to extreme element mobility.
CONTRIBUTIONS TO MINERALOGY AND PETROLOGY
(2021)
Article
Geochemistry & Geophysics
Bartosz Budzyn, Richard Wirth, Jiri Slama, Lukasz Birski, Fabian Tramm, Gabriela A. Kozub-Budzyn, Grzegorz Rzepa, Anja Schreiber
Summary: Experimental study on metasomatised monazite reveals that increasing temperature leads to evolution of monazite structure, while alteration processes induced by alkali-bearing fluid can result in recrystallization and disturbance of U-Pb and Th-Pb ages.
Article
Geosciences, Multidisciplinary
Calvin A. Mako, Richard D. Law, Mark J. Caddick, Andrew Kylander-Clark, J. Ryan Thigpen, Kyle T. Ashley, Sarah E. Mazza, John Cottle
Summary: Accessory phase geochronology in the Northern Highlands Terrane of Scotland records multiple phases of metamorphism affecting Moine metasedimentary rocks, with isotopic resetting at around 750 Ma, 600 Ma, and 425 Ma. Fluid-mediated dissolution and reprecipitation of monazite and xenotime caused isotopic resetting at around 600 Ma and 425 Ma in the Sgurr Beag nappe. The contrasting metamorphic records of adjacent Sgurr Beag and Moine nappes suggest a widespread metamorphic event at around 600 Ma in northern Scotland, possibly linked to the breakup of Rodinia. These data highlight the sensitivity of reprecipitated monazite composition to metamorphic conditions during fluid alteration, aiding in understanding the evolution of polyphase metamorphic terranes.
PRECAMBRIAN RESEARCH
(2021)
Article
Geosciences, Multidisciplinary
Francois Renard, Anja Royne, Christine V. Putnis
GEOSCIENCE FRONTIERS
(2019)
Article
Engineering, Environmental
Hang Zhai, Lijun Wang, Joern Hoevelmann, Lihong Qin, Wenjun Zhang, Christine V. Putnis
ENVIRONMENTAL SCIENCE & TECHNOLOGY
(2019)
Article
Geology
Jo Moore, Andreas Beinlich, Hakon Austrheim, Andrew Putnis
Article
Chemistry, Physical
Hang Zhai, Lijun Wang, Christine V. Putnis
JOURNAL OF PHYSICAL CHEMISTRY B
(2019)
Article
Chemistry, Physical
Jing Zhang, Lijun Wang, Christine V. Putnis
JOURNAL OF PHYSICAL CHEMISTRY B
(2019)
Editorial Material
Geochemistry & Geophysics
Christine V. Putnis
Article
Chemistry, Multidisciplinary
Lisa de Ruiter, Christine V. Putnis, Joern Hoevelmann, Helen E. King, Hakon Austrheim
ACS EARTH AND SPACE CHEMISTRY
(2019)
Article
Engineering, Environmental
Jialin Chi, Wenjun Zhang, Lijun Wang, Christine V. Putnis
ENVIRONMENTAL SCIENCE & TECHNOLOGY
(2019)
Article
Mineralogy
Cristina Ruiz-Agudo, Pedro Alvarez-Lloret, Fulvio Di Lorenzo, Denis Gebauer, Christine V. Putnis
EUROPEAN JOURNAL OF MINERALOGY
(2019)
Article
Geology
Jo Moore, Andreas Beinlich, Jennifer K. Porter, Cristina Talavera, Jasper Berndt, Sandra Piazolo, Hakon Austrheim, Andrew Putnis
JOURNAL OF METAMORPHIC GEOLOGY
(2020)
Article
Chemistry, Multidisciplinary
Jing Zhang, Lijun Wang, Wenjun Zhang, Christine Putnis
Article
Geology
Tania Hidalgo, Michael Verrall, Andreas Beinlich, Laura Kuhar, Andrew Putnis
ORE GEOLOGY REVIEWS
(2020)
Article
Geochemistry & Geophysics
Alexander M. Prent, Andreas Beinlich, Tom Raimondo, Christopher L. Kirkland, Noreen J. Evans, Andrew Putnis
Article
Engineering, Chemical
Tania Hidalgo, Laura Kuhar, Andreas Beinlich, Andrew Putnis
MINERALS ENGINEERING
(2020)
Article
Crystallography
Christine V. Putnis, Andrew Putnis
Summary: This article discusses the process of ion exchange in a range of solids through interface-coupled dissolution-precipitation in the presence of an aqueous solution.
JOURNAL OF CRYSTAL GROWTH
(2022)