Article
Geosciences, Multidisciplinary
S. C. Pearson-Grant, E. A. Bertrand
Summary: Topography plays a significant role in localizing convective upflows in geothermal systems, improving the accuracy of models and the agreement between upflow locations and low-resistivity zones derived from 3-D inversion of magnetotelluric data.
GEOPHYSICAL RESEARCH LETTERS
(2021)
Article
Geosciences, Multidisciplinary
Chunhai Li, Qifa Sun, Zhonglin Sun, Xiaohua Zhou, Wei Zhang, Rong Chen, Tianshan Gao
Summary: In this study, zircon SHRIMP dating was conducted on the Kaolin deposits in the northern margin of the Qinzhou-Hangzhou Suture Zone. The results suggest that the formation of these deposits occurred in the Neoproterozoic and late Jurassic periods. These findings provide a chronological basis for further investigation and evaluation of Kaolin deposits in this area.
FRONTIERS IN EARTH SCIENCE
(2022)
Article
Geosciences, Multidisciplinary
Kun Zhou, Yi-Xiang Chen, Jia-Wei Xiong, Hans-Peter Schertl, Xiao-Ping Xia
Summary: This study investigates the impact of fluid action on zircon geochemistry in subduction zones, particularly during metamorphic and metasomatic processes. The results show that fluid action significantly affects the U-Pb and O isotope systems of zircon, especially when external metasomatic fluids are involved.
GEOSCIENCE FRONTIERS
(2023)
Article
Computer Science, Interdisciplinary Applications
Ruby C. Marsden, Christopher L. Kirkland, Martin Danisik, Matthew L. Daggitt, Ung-San Ahn, Bjarne Friedrichs, Noreen J. Evans
Summary: A new analytical and data reduction workflow for zircon U-Th disequilibrium analysis using SHRIMP II was developed in this study, with a case study on trachytic samples from Jeju Island demonstrating the effectiveness of the new approach.
COMPUTERS & GEOSCIENCES
(2022)
Article
Geosciences, Multidisciplinary
Yusheng Wan, Chunyan Dong, Hangqiang Xie, Allen P. Nutman, Shiwen Xie, Yongqing Wang, Dunyi Liu
Summary: Anshan, located in northeastern North China Craton, has a geological history dating back to 3.8 billion years ago. The newly-discovered Hujiamiao Complex in Anshan has similarities with the Beijiafen Complex and consists of trondhjemitic rocks ranging in age from 3789 Ma to 3106 Ma. These trondhjemitic rocks have high SiO2 and Na2O content, low K2O content, and show similarities in composition. Further research is needed to determine the age of the gabbro in the complex. The Anshan Eoarchean rocks exhibit trondhjemitic rather than tonalitic character, indicating diversity in the formation and evolution of the earliest continental crust.
PRECAMBRIAN RESEARCH
(2023)
Article
Environmental Sciences
Guanghao Tian, Jianping Qian, Meng Qin
Summary: This study analyzed the petrography and dating of the granite complex in the Maohuo area, revealing that it consists of granodiorite porphyry and biotite monzogranite, which were formed during the late Triassic magmatic activity. The rock geochemical characteristics indicate that these two rocks are I-type granites formed in a typical island-arc environment.
ENVIRONMENTAL EARTH SCIENCES
(2023)
Article
Geochemistry & Geophysics
Makiko K. Haba, Joern-Frederik Wotzlaw
Summary: Eucrite meteorites are believed to originate from the upper crust of the asteroid Vesta, with zircons providing insight into the initial magmatism and thermal metamorphism that occurred around 4550-4555 million years ago on Vesta. By using advanced dating methods, researchers were able to distinguish zircons formed during different thermal events in the early stages of Vesta's crustal evolution, shedding light on the formation and history of the Vesta crust. The findings suggest that zircons in eucrites like Camel Donga were formed during early magmatism or global thermal metamorphism in the early stages of Vesta's crustal formation.
Article
Geosciences, Multidisciplinary
Wenhao Zhao, Qiuli Li, Yu Liu, Guoqiang Tang, Xiaoxiao Ling, Jiao Li, Xianhua Li
Summary: Secondary ion mass spectrometry (SIMS) zircon U-Pb dating can be used to determine the absolute ages of magmatic or metamorphic events and distinguish multiple events. This study compiled a dataset of zircon standards dating data to evaluate the long-term external reproducibility and analyzed the uncertainties of single-spot and session analyses.
JOURNAL OF EARTH SCIENCE
(2022)
Article
Geochemistry & Geophysics
Jasper R. Huijsmans, Maartje Hamers, Martyn R. Drury, James K. W. Lee
Summary: Complex microstructures of zircon recrystallisation have been discovered, indicating the translation, bending and fading of oscillatory zoning, structural recovery, enrichment in Hf and depletion in Y, and the formation of a recrystallisation interface. The migration of trace elements and dislocations during crystallisation and cooling process leads to enhanced diffusion and further trace element mobility. Understanding the crystallisation and recrystallisation history is crucial for accurate interpretation of U-Pb ages.
Article
Geology
Zhitao Xu, Liying Sun, Xiqing Ye, Fei Ma, Chang Yu, Zhaoxin Chen, Xuemei Li, Xiaodong Pan
Summary: The study aims to investigate the emplacement age, magma evolution processes, and mantle source of monogenetic vents near the Changbaishan Tianchi volcano in NE China through geochemical and isotopic analysis. The results reveal that these volcanoes have a mantle source similar to OIB-type and are influenced by fluids released from the underlying Pacific flat slab.
INTERNATIONAL GEOLOGY REVIEW
(2023)
Article
Geochemistry & Geophysics
Heriberto Rochin-Banaga, Donald W. Davis
Summary: This study examines the feasibility of using LA-ICPMS for U-Pb dating of vertebrate and invertebrate apatite fossils. The results suggest that the U-Pb system in shark teeth remains closed until the present but some teeth show anomalous ages possibly due to lead remobilization. Overall, LA-ICPMS allows for more precise absolute dating of fossils.
Article
Geosciences, Multidisciplinary
James D. Muirhead, Finnigan Illsley-Kemp, Simon J. Barker, Pilar Villamor, Colin J. N. Wilson, Peter Otway, Eleanor R. H. Mestel, Graham S. Leonard, Susan Ellis, Martha K. Savage, Stephen Bannister, Julie V. Rowland, Dougal Townsend, Ian J. Hamling, Sigrun Hreinsdottir, Bubs Smith, Ross McGregor, Madisen Snowden, Yaasameen Shalla
Summary: The study focuses on the magmatic-tectonic processes associated with volcanic unrest at silicic calderas. Short-term deformation patterns, such as uplift, subsidence, seismic activity, and ground shaking, are observed, while long-term behavior shows suppression of axial subsidence of the rift basin due to magma influx. Silicic volcanic eruptions are characterized by intense syn-eruptive deformation, extending beyond the caldera structure.
FRONTIERS IN EARTH SCIENCE
(2022)
Article
Geology
Sarah D. Milicich, Nick Mortimer, Pilar Villamor, Colin J. N. Wilson, Isabelle Chambefort, Matt W. Sagar, Trevor R. Ireland
Summary: By studying the U-Pb zircon ages of basement rocks and geothermal sediments in the Taupo Volcanic Zone in New Zealand, the location and possible reactivation of terrane boundaries beneath the TVZ have been examined, shedding light on the control of Quaternary extension on the evolution of the Taupo Rift and the enhanced fracture permeability for deep-seated geothermal fluids.
NEW ZEALAND JOURNAL OF GEOLOGY AND GEOPHYSICS
(2021)
Article
Geology
Shi-Jiong Han, Yan-Chen Yang, Jun-Wei Bo, Zi-Heng Han, Yong-wei Huang, Yun-bao Yang
Summary: The Sipingshan gold deposit in eastern Wandashan Terrane is of intermediate size and is known for its unique hot spring genetic type. Gold orebodies are mainly found in upper and lower siliceous rocks, with siliceous cemented breccia in between. Two main mineralisation periods have been identified based on mineral paragenesis and crosscutting vein relationships. Analytical methods including whole-rock geochemistry, pyrite Rb-Sr dating, zircon U-Pb-Hf contents, and isotopic analysis were conducted to determine the age and genesis of the gold mineralisation.
ORE GEOLOGY REVIEWS
(2023)
Article
Geosciences, Multidisciplinary
Hisatoshi Ito
Summary: Recent application of zircon U-Pb geochronology has provided important insights into the evolution of caldera systems worldwide. However, in the Tohoku region of NE Japan, the magmatic history has not been well understood. A study on the Sanzugawa caldera using U-Pb dating of zircon has revealed that its volcanic activity started around 7 million years ago and reached its peak in the late Pliocene to Quaternary period. This finding challenges previous assumptions about the timing of caldera formation and highlights the importance of further dating studies in the Tohoku region.
FRONTIERS IN EARTH SCIENCE
(2023)
Article
Multidisciplinary Sciences
Tetsuya Yokoyama, Kazuhide Nagashima, Izumi Nakai, Edward D. Young, Yoshinari Abe, Jerome Aleon, Conel M. O'D. Alexander, Sachiko Amari, Yuri Amelin, Ken-ichi Bajo, Martin Bizzarro, Audrey Bouvier, Richard W. Carlson, Marc Chaussidon, Byeon-Gak Choi, Nicolas Dauphas, Andrew M. Davis, Tommaso Di Rocco, Wataru Fujiya, Ryota Fukai, Ikshu Gautam, Makiko K. Haba, Yuki Hibiya, Hiroshi Hidaka, Hisashi Homma, Peter Hoppe, Gary R. Huss, Kiyohiro Ichida, Tsuyoshi Iizuka, Trevor R. Ireland, Akira Ishikawa, Motoo Ito, Shoichi Itoh, Noriyuki Kawasaki, Noriko T. Kita, Kouki Kitajima, Thorsten Kleine, Shintaro Komatani, Alexander N. Krot, Ming-Chang Liu, Yuki Masuda, Kevin D. McKeegan, Mayu Morita, Kazuko Motomura, Frederic Moynier, Ann Nguyen, Larry Nittler, Morihiko Onose, Andreas Pack, Changkun Park, Laurette Piani, Liping Qin, Sara S. Russell, Naoya Sakamoto, Maria Schoenbaechler, Lauren Tafla, Haolan Tang, Kentaro Terada, Yasuko Terada, Tomohiro Usui, Sohei Wada, Meenakshi Wadhwa, Richard J. Walker, Katsuyuki Yamashita, Qing-Zhu Yin, Shigekazu Yoneda, Hiroharu Yui, Ai-Cheng Zhang, Harold C. Connolly Jr, Dante S. Lauretta, Tomoki Nakamura, Hiroshi Naraoka, Takaaki Noguchi, Ryuji Okazaki, Kanako Sakamoto, Hikaru Yabuta, Masanao Abe, Masahiko Arakawa, Atsushi Fujii, Masahiko Hayakawa, Naoyuki Hirata, Naru Hirata, Rie Honda, Chikatoshi Honda, Satoshi Hosoda, Yu-ichi Iijima, Hitoshi Ikeda, Masateru Ishiguro, Yoshiaki Ishihara, Takahiro Iwata, Kosuke Kawahara, Shota Kikuchi, Kohei Kitazato, Koji Matsumoto, Moe Matsuoka, Tatsuhiro Michikami, Yuya Mimasu, Akira Miura, Tomokatsu Morota, Satoru Nakazawa, Noriyuki Namiki, Hirotomo Noda, Rina Noguchi, Naoko Ogawa, Kazunori Ogawa, Tatsuaki Okada, Chisato Okamoto, Go Ono, Masanobu Ozaki, Takanao Saiki, Naoya Sakatani, Hirotaka Sawada, Hiroki Senshu, Yuri Shimaki, Kei Shirai, Seiji Sugita, Yuto Takei, Hiroshi Takeuchi, Satoshi Tanaka, Eri Tatsumi, Fuyuto Terui, Yuichi Tsuda, Ryudo Tsukizaki, Koji Wada, Sei-ichiro Watanabe, Manabu Yamada, Tetsuya Yamada, Yukio Yamamoto, Hajime Yano, Yasuhiro Yokota, Keisuke Yoshihara, Makoto Yoshikawa, Kent Yoshikawa, Shizuho Furuya, Kentaro Hatakeda, Tasuku Hayashi, Yuya Hitomi, Kazuya Kumagai, Akiko Miyazaki, Aiko Nakato, Masahiro Nishimura, Hiromichi Soejima, Ayako Suzuki, Toru Yada, Daiki Yamamoto, Kasumi Yogata, Miwa Yoshitake, Shogo Tachibana, Hisayoshi Yurimoto
Summary: Carbonaceous meteorites from C-type asteroids were examined using samples from asteroid (162173) Ryugu. The samples resemble carbonaceous chondrite meteorites, particularly the CI group, and are made up of minerals formed in aqueous fluids. These minerals were altered at a temperature of 37 degrees Celsius about 5.2 million years after the formation of the first solids in the Solar System. The Ryugu samples have a composition similar to the Sun's photosphere.
Article
Astronomy & Astrophysics
Marine Paquet, Frederic Moynier, Tetsuya Yokoyama, Wei Dai, Yan Hu, Yoshinari Abe, Jerome Aleon, Conel M. O'D. Alexander, Sachiko Amari, Yuri Amelin, Ken-ichi Bajo, Martin Bizzarro, Audrey Bouvier, Richard W. Carlson, Marc Chaussidon, Byeon-Gak Choi, Nicolas Dauphas, Andrew M. Davis, Tommaso Di Rocco, Wataru Fujiya, Ryota Fukai, Ikshu Gautam, Makiko K. Haba, Yuki Hibiya, Hiroshi Hidaka, Hisashi Homma, Peter Hoppe, Gary R. Huss, Kiyohiro Ichida, Tsuyoshi Iizuka, Trevor R. Ireland, Akira Ishikawa, Motoo Ito, Shoichi Itoh, Noriyuki Kawasaki, Noriko T. Kita, Kouki Kitajima, Thorsten Kleine, Shintaro Komatani, Alexander N. Krot, Ming-Chang Liu, Yuki Masuda, Kevin D. McKeegan, Mayu Morita, Kazuko Motomura, Izumi Nakai, Kazuhide Nagashima, David Nesvorny, Ann N. Nguyen, Larry Nittler, Morihiko Onose, Andreas Pack, Changkun Park, Laurette Piani, Liping Qin, Sara S. Russell, Naoya Sakamoto, Maria Schoenbaechler, Lauren Tafla, Haolan Tang, Kentaro Terada, Yasuko Terada, Tomohiro Usui, Sohei Wada, Meenakshi Wadhwa, Richard J. Walker, Katsuyuki Yamashita, Qing-Zhu Yin, Shigekazu Yoneda, Edward D. Young, Hiroharu Yui, Ai-Cheng Zhang, Tomoki Nakamura, Hiroshi Naraoka, Takaaki Noguchi, Ryuji Okazaki, Kanako Sakamoto, Hikaru Yabuta, Masanao Abe, Akiko Miyazaki, Aiko Nakato, Masahiro Nishimura, Tatsuaki Okada, Toru Yada, Kasumi Yogata, Satoru Nakazawa, Takanao Saiki, Satoshi Tanaka, Fuyuto Terui, Yuichi Tsuda, Sei-ichiro Watanabe, Makoto Yoshikawa, Shogo Tachibana, Hisayoshi Yurimoto
Summary: Initial analyses indicate that asteroid Ryugu has a composition similar to CI carbonaceous chondrites, which are the most primitive meteorites. However, further research is needed to establish the exact relationship. A recently conducted study reveals that Ryugu and CI chondrites share the same zinc and copper isotopic composition, suggesting a common genetic heritage between them. Additionally, the study suggests that Ryugu-like material might have contributed to Earth's budgets of certain elements.
Article
Astronomy & Astrophysics
Laurette Piani, Kazuhide Nagashima, Noriyuki Kawasaki, Naoya Sakamoto, Ken-ichi Bajo, Yoshinari Abe, Jerome Aleon, Conel M. O'D. Alexander, Sachiko Amari, Yuri Amelin, Martin Bizzarro, Audrey Bouvier, Richard W. Carlson, Marc Chaussidon, Byeon-Gak Choi, Nicolas Dauphas, Andrew M. Davis, Tommaso Di Rocco, Wataru Fujiya, Ryota Fukai, Ikshu Gautam, Makiko K. Haba, Yuki Hibiya, Hiroshi Hidaka, Hisashi Homma, Peter Hoppe, Gary R. Huss, Kiyohiro Ichida, Tsuyoshi Iizuka, Trevor R. Ireland, Akira Ishikawa, Shoichi Itoh, Noriko T. Kita, Kouki Kitajima, Thorsten Kleine, Shintaro Komatani, Alexander N. Krot, Ming-Chang Liu, Yuki Masuda, Kevin D. McKeegan, Mayu Morita, Kazuko Motomura, Frederic Moynier, Izumi Nakai, Ann Nguyen, Larry Nittler, Morihiko Onose, Andreas Pack, Changkun Park, Liping Qin, Sara S. Russell, Maria Schoenbaechler, Lauren Tafla, Haolan Tang, Kentaro Terada, Yasuko Terada, Tomohiro Usui, Sohei Wada, Meenakshi Wadhwa, Richard J. Walker, Katsuyuki Yamashita, Qing-Zhu Yin, Tetsuya Yokoyama, Shigekazu Yoneda, Edward D. Young, Hiroharu Yui, Ai-Cheng Zhang, Tomoki Nakamura, Hiroshi Naraoka, Ryuji Okazaki, Kanako Sakamoto, Hikaru Yabuta, Masanao Abe, Akiko Miyazaki, Aiko Nakato, Masahiro Nishimura, Tatsuaki Okada, Toru Yada, Kasumi Yogata, Satoru Nakazawa, Takanao Saiki, Satoshi Tanaka, Fuyuto Terui, Yuichi Tsuda, Sei-ichiro Watanabe, Makoto Yoshikawa, Shogo Tachibana, Hisayoshi Yurimoto
Summary: Rock fragments from the Cb-type asteroid Ryugu, brought back to Earth by the JAXA Hayabusa2 mission, exhibit similarities in mineralogy, chemistry, and isotopic properties to the Ivuna-type (CI) carbonaceous chondrites. These fragments, similar to CI chondrites, have undergone extensive alteration in the presence of liquid water and consist mainly of hydrous minerals. An in situ survey using secondary ion mass spectrometry reveals that the D/H ratio of Ryugu's hydrous minerals, D/H-Ryugu, is estimated to be [165 +/- 19] x 10(-6), corresponding to delta D-Ryugu = +59 +/- 121 parts per thousand (2 sigma). The similar D/H-Ryugu values at the two sampling sites on Ryugu, as well as the similarity with the D/H ratio of hydrous minerals in CI chondrites, further support the link between Ryugu and CI chondrites. Furthermore, by evaluating data and previous studies, it is estimated that CI chondrites contributed approximately 3% to the hydrogen content of Earth's surface reservoirs. Therefore, it is concluded that the water responsible for the alteration of Ryugu's rocks originated from water ice precursors inherited from the interstellar medium, with its hydrogen partially re-equilibrating with nebular H-2 before being accreted onto Ryugu's parent asteroid.
ASTROPHYSICAL JOURNAL LETTERS
(2023)
Correction
Geochemistry & Geophysics
Shane M. Rooyakkers, Colin J. N. Wilson, C. Ian Schipper, Simon J. Barker, Aidan S. R. Allan
CONTRIBUTIONS TO MINERALOGY AND PETROLOGY
(2023)
Article
Geochemistry & Geophysics
Leo R. Pure, Colin J. N. Wilson, Bruce L. A. Charlier, John A. Gamble, Dougal B. Townsend, Graham S. Leonard
Summary: New geochemical data for Tongariro volcano in New Zealand reveal systematic cycles in its eruptive history, with mafic replenishment events occurring at specific intervals. The isotopic ratios also indicate periods of prolonged crustal residence of magmas. It is suggested that the magma assembly processes at Tongariro and neighboring volcanoes were contemporaneous and influenced by tectonic activities.
CONTRIBUTIONS TO MINERALOGY AND PETROLOGY
(2023)
Article
Geography, Physical
Stephen B. Piva, Simon J. Barker, Rewi M. Newnham, Andrew B. H. Rees, Colin J. N. Wilson, Lionel Carter, Nels A. Iverson, Benjamin Läuchli, Paul C. Augustinus
Summary: This study analyzed sediment cores from Onepoto maar palaeolake in Auckland to investigate the impacts of the Oruanui supereruption on vegetation and landscape. The results showed that the eruption caused partial defoliation of canopy trees, allowing more light penetration and promoting sub-canopy vegetation growth. This study also demonstrated the value of millimeter-scale stratigraphic pollen analysis for assessing eruptive impacts on sub-decadal timescales.
JOURNAL OF QUATERNARY SCIENCE
(2023)
Article
Geosciences, Multidisciplinary
Hannah C. Elms, Simon J. Barker, Daniel J. Morgan, Colin J. N. Wilson, Bruce L. A. Charlier
Summary: Understanding the formation and development of magma bodies in the crust prior to eruption is crucial for volcanic monitoring. This study focuses on the timescales of pre-eruptive processes during young intra-caldera eruptions in O over bar kataina Volcanic Centre, New Zealand. By analyzing mineral chemistry and zoning patterns, the researchers found that melt segregation, magma body assembly, and residence in the upper crust occur over timescales ranging from decades to centuries or even as short as months. The findings highlight the importance of multiple processes in the assembly and eruption of melt bodies and their relevance to geophysical imaging and monitoring initiatives.
JOURNAL OF VOLCANOLOGY AND GEOTHERMAL RESEARCH
(2023)
Article
Geography, Physical
Charlotte O. Pizer, Jamie D. Howarth, Kate J. Clark, Colin J. N. Wilson, Stephanie E. Tickle, Jenni L. Hopkins, Jenny A. Dahl
Summary: Volcanic ash (tephra) horizons are important for correlating natural archives, but age uncertainties can hinder their effectiveness. We use the Waimihia tephra as a case study to improve age constraints for Holocene tephra isochrons by employing detailed assessments, precise AMS dating, and Bayesian age models. Our findings have implications for refining paleoearthquake correlations and chronologies relying on the Waimihia isochron.
QUATERNARY SCIENCE REVIEWS
(2023)
Article
Geochemistry & Geophysics
Shane M. Rooyakkers, Isabelle Chambefort, Kevin Faure, Colin J. N. Wilson, Simon J. Barker, Nick Mortimer, Hannah C. Elms, Juliana Troch, Bruce L. A. Charlier, Graham S. Leonard, David Farsky
Summary: Despite the common association of large-scale magmatism with intense hydro-thermal activity, magmas with low 818O values are globally rare. This study investigates this paradox in the central Taupo Volcanic Zone (TVZ) in New Zealand and provides possible explanations. The study finds that although silicic magmas with low 818O values are absent, interactions between large silicic magmatic systems and shallow altered crustal rocks are common and widespread in the TVZ.
GEOCHIMICA ET COSMOCHIMICA ACTA
(2023)
Article
Geosciences, Multidisciplinary
Nick Mortimer, Bruce L. A. Charlier, Shane M. Rooyakkers, Rose E. Turnbull, Colin J. N. Wilson, Marianne Negrini, Stephen Bannister, Sarah D. Milicich, Isabelle Chambefort, Craig A. Miller, Geoff Kilgour
Summary: The Quaternary volcanic rocks in New Zealand's Taupo Volcanic Zone (TVZ) are hosted by the metasedimentary crustal basement terranes rather than the volcanic and volcaniclastic fill. Research shows that the boundary of these terranes is not vertical, but gently dips west. This new interpretation provides important constraints for geodynamic understanding, petrological modeling, and future deep geothermal drilling.
JOURNAL OF VOLCANOLOGY AND GEOTHERMAL RESEARCH
(2023)
Article
Geosciences, Multidisciplinary
Wataru Fujiya, Noriyuki Kawasaki, Kazuhide Nagashima, Naoya Sakamoto, Conel M. O'D. Alexander, Noriko T. Kita, Kouki Kitajima, Yoshinari Abe, Jerome Aleon, Sachiko Amari, Yuri Amelin, Ken-ichi Bajo, Martin Bizzarro, Audrey Bouvier, Richard W. Carlson, Marc Chaussidon, Byeon-Gak Choi, Nicolas Dauphas, Andrew M. Davis, Tommaso Di Rocco, Ryota Fukai, Ikshu Gautam, Makiko K. Haba, Yuki Hibiya, Hiroshi Hidaka, Hisashi Homma, Peter Hoppe, Gary R. Huss, Kiyohiro Ichida, Tsuyoshi Iizuka, Trevor R. Ireland, Akira Ishikawa, Shoichi Itoh, Thorsten Kleine, Shintaro Komatani, Alexander N. Krot, Ming-Chang Liu, Yuki Masuda, Kevin D. McKeegan, Mayu Morita, Kazuko Motomura, Frederic Moynier, Izumi Nakai, Ann Nguyen, Larry Nittler, Morihiko Onose, Andreas Pack, Changkun Park, Laurette Piani, Liping Qin, Sara S. Russell, Maria Schonbachler, Lauren Tafla, Haolan Tang, Kentaro Terada, Yasuko Terada, Tomohiro Usui, Sohei Wada, Meenakshi Wadhwa, Richard J. Walker, Katsuyuki Yamashita, Qing-Zhu Yin, Tetsuya Yokoyama, Shigekazu Yoneda, Edward D. Young, Hiroharu Yui, Ai-Cheng Zhang, Tomoki Nakamura, Hiroshi Naraoka, Takaaki Noguchi, Ryuji Okazaki, Kanako Sakamoto, Hikaru Yabuta, Masanao Abe, Akiko Miyazaki, Aiko Nakato, Masahiro Nishimura, Tatsuaki Okada, Toru Yada, Kasumi Yogata, Satoru Nakazawa, Takanao Saiki, Satoshi Tanaka, Fuyuto Terui, Yuichi Tsuda, Sei-ichiro Watanabe, Makoto Yoshikawa, Shogo Tachibana, Hisayoshi Yurimoto
Summary: The study of samples from asteroid Ryugu brought to Earth by the Hayabusa2 spacecraft revealed that there are variable oxygen and carbon isotopes in the calcium carbonate. This suggests that Ryugu underwent aqueous alteration under different temperature and redox conditions, leading to a unique evolutionary pathway compared to other hydrous meteorites.
Article
Multidisciplinary Sciences
Stephen B. Piva, Simon J. Barker, Nels A. Iverson, V. Holly L. Winton, Nancy A. N. Bertler, Michael Sigl, Colin J. N. Wilson, Nelia W. Dunbar, Andrei V. Kurbatov, Lionel Carter, Bruce L. A. Charlier, Rewi M. Newnham
Summary: By analyzing glass shards in the Antarctic ice core, this study successfully identified the Taupo volcanic eruption 1.8 ka and linked it to other eruption events. These findings are important for accurately estimating eruption timing, source volcanoes, and the impact of volcanic activities on climate.
SCIENTIFIC REPORTS
(2023)
Article
Multidisciplinary Sciences
Ann. N. Nguyen, Prajkta Mane, Lindsay P. Keller, Laurette Piani, Yoshinari Abe, Jerome Aleon, Conel M. O'D. Alexander, Sachiko Amari, Yuri Amelin, Ken-ichi Bajo, Martin Bizzarro, Audrey Bouvier, Richard W. Carlson, Marc Chaussidon, Byeon-Gak Choi, Nicolas Dauphas, Andrew M. Davis, Tommaso Di Rocco, Wataru Fujiya, Ryota Fukai, Ikshu Gautam, Makiko K. Haba, Yuki Hibiya, Hiroshi Hidaka, Hisashi Homma, Peter Hoppe, Gary R. Huss, Kiyohiro Ichida, Tsuyoshi Iizuka, Trevor R. Ireland, Akira Ishikawa, Shoichi Itoh, Noriyuki Kawasaki, Noriko T. Kita, Kouki Kitajima, Thorsten Kleine, Shintaro Komatani, Alexander N. Krot, Ming-Chang Liu, Yuki Masuda, Kevin D. McKeegan, Mayu Morita, Kazuko Motomura, Frederic Moynier, Izumi Nakai, Kazuhide Nagashima, David Nesvorny, Larry Nittler, Morihiko Onose, Andreas Pack, Changkun Park, Liping Qin, Sara S. Russell, Naoya Sakamoto, Maria Schonbachler, Lauren Tafla, Haolan Tang, Kentaro Terada, Yasuko Terada, Tomohiro Usui, Sohei Wada, Meenakshi Wadhwa, Richard J. Walker, Katsuyuki Yamashita, Qing-Zhu Yin, Tetsuya Yokoyama, Shigekazu Yoneda, Edward D. Young, Hiroharu Yui, Ai-Cheng Zhang, Tomoki Nakamura, Hiroshi Naraoka, Takaaki Noguchi, Ryuji Okazaki, Kanako Sakamoto, Hikaru Yabuta, Masanao Abe, Akiko Miyazaki, Aiko Nakato, Masahiro Nishimura, Tatsuaki Okada, Toru Yada, Kasumi Yogata, Satoru Nakazawa, Takanao Saiki, Satoshi Tanaka, Fuyuto Terui, Yuichi Tsuda, Sei-ichiro Watanabe, Makoto Yoshikawa, Shogo Tachibana, Hisayoshi Yurimoto
Summary: Preliminary analyses of asteroid Ryugu samples show its kinship to aqueously altered CI chondrites, suggesting similar origins. C-rich primitive clasts in Ryugu samples contain preserved presolar silicate grains and exceptional abundances of presolar SiC and isotopically anomalous organic matter. The high presolar silicate abundance indicates minimal alteration, and the significantly higher abundances of presolar SiC, N-rich organic matter, and isotopically anomalous organics in the primitive clasts suggest a unique formation in a presolar material-enriched region of the protoplanetary disk.
Article
Geosciences, Multidisciplinary
Hannah C. Elms, Madison L. Myers, Alexander R. L. Nichols, Paul J. Wallace, Colin J. N. Wilson, Simon J. Barker, Bruce L. A. Charlier
Summary: By studying eight volcanic eruptions at the Okataina Volcanic Centre in New Zealand, it was found that there are differences in the volatile content and ascent rate of volcanic rock, melt inclusions, and embayments. The final movement of volcanic eruption towards the surface may only take a few hours.
BULLETIN OF VOLCANOLOGY
(2023)