Article
Environmental Sciences
Liu Pengde, Liu Xijun, Xiao Wenjiao, Zhang Zhiguo, Song Yujia, Xiao Yao, Liu Lei, Hu Rongguo, Wang Baohua
Summary: The Early Carboniferous volcanic and intrusive rocks found in the Mayile area of West Junggar, northwestern China, are typical subduction-zone island-arc magma, characterized by enrichment in light rare-earth elements and large-ion lithophile elements, and depletion in heavy rare-earth elements and high-field-strength elements. This suggests that extensive intra-oceanic arc magmatism occurred in West Junggar during the Early Carboniferous period.
JOURNAL OF ARID LAND
(2021)
Article
Geosciences, Multidisciplinary
Zhiguo Zhang, Xijun Liu, Wenjiao Xiao, Ji-Feng Xu, Yu Shi, Xiaohan Gong, Rongguo Hu, Pengde Liu, Yujia Song, Yao Xiao, Zhaoqi Zhang, Rui Li, Dechao Li
Summary: The study of Carboniferous magmatism in northern West Junggar reveals that the volcanic rocks from the Hamutusi area record the initiation of ridge subduction related to a transition from normal subduction to subduction of young and hot oceanic lithosphere between the early and late Carboniferous.
Article
Geochemistry & Geophysics
Barun Maity, Graham D. Layne, Fred J. Longstaffe
Summary: This study investigates the petrogenesis and tectonic environments of ca. 980 Ma potassic to ultrapotassic dykes (PUD) from the Canyon domain in central Grenville Province, Canada, using whole-rock Sr-Nd-Pb-O isotope data and previously published results. The results reveal the diverse origins of the PUD dykes, involving both fertile and depleted sources, and significant impact of ancient subduction. The latest phase of fluid/melt metasomatism during the late-Grenvillian tectonic setting also plays an important role.
Article
Geology
Yalei Wang, Shengchao Xue, Xiaoman Wang, Zhaowei Zhang, Luyang Wang, Yu Xin, Ze Zhang, Yongkang He
Summary: Numerous early Paleozoic mafic-ultramafic intrusions in the Qinghai-Tibet Plateau host important Ni-Cu sulfide mineralization. The Shitoukengde Ni-Cu deposit is one of the most representative magmatic sulfide deposits in the East Kunlun Orogenic Belt. The deposit exhibits disseminated and net-textured sulfide mineralization, with variable sulfur contents and low platinum-group element concentrations.
ORE GEOLOGY REVIEWS
(2023)
Article
Geochemistry & Geophysics
Simon Hohl, Stephan Schuth, Carsten Muenker, Stephan Koenig, Dieter Garbe-Schoenberg, Jonathan Kuduon
Summary: The study of the Rabaul volcanic complex in Papua New Guinea reveals that the geological evolution of the volcano is primarily influenced by high-temperature fractional crystallisation in the inner caldera lavas, while outer caldera lavas are influenced by slab melts. Analysis of the compositions and isotope ratios of the lavas has provided insights into the geochemical characteristics of volcanic activity in the region, which is controlled by various factors.
Article
Geochemistry & Geophysics
Pengde Liu, Xijun Liu, Wenjiao Xiao, Zhiguo Zhang, Yao Xiao, Yujia Song, Hao Wu
Summary: Magnesian and/or Nb-rich dioritic-andesitic rocks have been found in the Mayile area of southern West Junggar, Northwest China. This study conducted a comprehensive investigation to understand the origin, mantle source, and tectonomagmatic processes in the southern Paleo-Asian Ocean subduction zone. The results suggest that the Mayile rocks formed in the Late Carboniferous and experienced high-temperature and shallow-level partial melting in a mantle wedge. These rocks exhibit characteristics of sanukitic high-Mg andesites and provide insights into the subduction history and tectonic evolution in the region.
Article
Geochemistry & Geophysics
S. E. Suarez, T. J. Lapen, M. Righter, B. L. Beard, A. J. Irving
Summary: The Tissint strewn field, with over 16 kg of material, is a unique area with minimal terrestrial weathering and contamination. Despite similarities in geochemistry, there are differences in age determinations from different fragments, suggesting heterogeneity in the strewn field. Questions remain about the presence of martian soil components in impact glass and the sources of radiogenic Sr and Pb.
GEOCHIMICA ET COSMOCHIMICA ACTA
(2022)
Article
Astronomy & Astrophysics
Augustus Bates, S. Goossens, J. M. Lorenzo, L. Ojha, D. R. Hood, S. Karunatillake, S. Kobs Nawotniak, T. Paladino
Summary: This study presents geochemical evidence supporting the hypothesis of supervolcanic calderas in northwest Arabia Terra. Gravitational modeling suggests the presence of low-density pyroclastic loading and a low elastic thickness, indicating higher heat flow during eruption. The unique geochemical observations reinforce the compositional distinctiveness of this region compared to contemporaneous volcanoes.
Article
Geochemistry & Geophysics
Xiuqing Yang, Jingwen Mao, Zuoheng Zhang, Leslie J. Robbins, Noah J. Planavsky, Zongsheng Jiang, Shigang Duan, Zhenwu Chen
Summary: Iron formations (IFs) are iron-rich chemical sediments widespread in the Precambrian, providing key evidence of anoxic and ferruginous marine conditions throughout Earth's history. The Shikebutai IF in northwest China's Western Tianshan region is predominantly composed of hematite, jasper, and siderite, with an authigenic origin indicated by its chemical composition dominated by Fe2O3 and SiO2.
GEOCHIMICA ET COSMOCHIMICA ACTA
(2021)
Article
Geochemistry & Geophysics
Bao-Quan Zhou, Jin-Hui Yang, Jin-Feng Sun, Hao Wang, Yu-Sheng Zhu, Ya-Dong Wu, Lei Xu
Summary: Studies indicate that there is a complex genetic relationship between different rock types in the Houshihushan alkaline ring complex, with the geochemical features and isotopic compositions of apatites playing a crucial role in revealing the evolutionary history between volcanic and plutonic rocks.
Article
Geosciences, Multidisciplinary
Changfeng Liu, Zhiguang Zhou, Guosheng Wang, Chen Wu, Hongying Li, Shiwei Ma
Summary: The Xingmeng Orogenic Belt underwent multiple episodes of subduction and accretion during a long-lived orogeny, with a debate on its Late Paleozoic tectonic evolution. This study presents geochemical, geochronological, and isotopic data on strongly peraluminous granites and gabbro-diorites in the region, suggesting they may have originated from partial melting of heterogeneous sources. The findings support a ridge subduction model for the tectonic architecture of the Sunidzuoqi-Xilinhot region.
GEOSCIENCE FRONTIERS
(2021)
Article
Geochemistry & Geophysics
Jin-Feng Sun, Jin-Hui Yang, Ji-Heng Zhang, Yue-Heng Yang, Yu-Sheng Zhu
Summary: Apatite geochemical and Sr-Nd isotopic compositions are powerful tools for studying the source and evolution of magma, providing evidence for the origin of granitoids. The distinct occurrences, geochemical features, and isotopic compositions of apatite grains in Early Cretaceous granite from northeastern China suggest different origins and processes.
Article
Geochemistry & Geophysics
K. S. Panter, Y. Li, J. L. Smellie, J. Blusztajn, J. Reindel, K. Odegaard, M. J. Spicuzza, S. Hart
Summary: Mount Early and Sheridan Bluff are isolated volcanic fields at Earth's southernmost point, with unique geological characteristics influenced by a combination of mantle source mixing and crustal processes.
CONTRIBUTIONS TO MINERALOGY AND PETROLOGY
(2022)
Article
Geochemistry & Geophysics
Feng Wang, Kai-Chen Xing, Wen-Liang Xu, Fang-Zhen Teng, Yi-Gang Xu, De-Bin Yang
Summary: The Khanka Massif in late Paleozoic is considered as an ideal site to trace fossil ridge-subduction, with different types of Permian igneous rocks showing evidence of subduction setting. The isotope compositions of the rocks support the hypothesis of abnormal high-heat conditions caused by ridge subduction and resultant slab window.
Article
Geochemistry & Geophysics
C. Rasoazanamparany, E. Widom, D. Kuentz, T. Raharimahefa, A. M. F. Rakotondrazafy, K. M. Rakotondravelo
Summary: This study focuses on the basaltic lavas from the Southwest Ankaratra volcanic field in the central highlands of Madagascar. The research involves various analyses including 40Ar/39Ar dating, major and trace element studies, and Sr, Nd, Pb, Hf, Os isotopic studies. The results reveal significant chemical and isotopic heterogeneity among the Southwest Ankaratra magmas, suggesting different geochemical groups within the Quaternary Ankaratra magmas.
Review
Geosciences, Multidisciplinary
F. R. Chauque, U. G. Cordani, D. L. Jamal, A. T. Onoe
JOURNAL OF AFRICAN EARTH SCIENCES
(2017)
Review
Geosciences, Multidisciplinary
Jacques Kornprobst, Benito Abalos, Pierre Barbey, Anne-Marie Boullier, Jean-Pierre Burg, Ramon Capdevila, Stefan Claesson, Umberto Cordani, David Corrigan, Roy H. Gabrielsen, Jose I. Gil-Ibarguchi, Ake Johansson, Dominik Letsch, Philippe Le Vigouroux, Brian Upton
BSGF-EARTH SCIENCES BULLETIN
(2018)
Article
Geosciences, Multidisciplinary
Beatriz Coira, Suzanne Mahlburg Kay, Jose G. Viramonte, Robert W. Kay, Claudia Galli
JOURNAL OF VOLCANOLOGY AND GEOTHERMAL RESEARCH
(2018)
Article
Geochemistry & Geophysics
Michael P. Eddy, Mauricio Ibanez-Mejia, Seth D. Burgess, Matthew A. Coble, Umberto G. Cordani, Joel DesOrmeau, George E. Gehrels, Xianhua Li, Scott MacLennan, Mark Pecha, Kei Sato, Blair Schoene, Victor A. Valencia, Jeffrey D. Vervoort, Tiantian Wang
GEOSTANDARDS AND GEOANALYTICAL RESEARCH
(2019)
Article
Geosciences, Multidisciplinary
F. R. Chauque, U. G. Cordani, D. L. Jamal
JOURNAL OF AFRICAN EARTH SCIENCES
(2019)
Review
Geosciences, Multidisciplinary
W. Teixeira, U. G. Cordani, F. M. Faleiros, K. Sato, V. C. Maurer, A. S. Ruiz, E. J. P. Azevedo
EARTH-SCIENCE REVIEWS
(2020)
Article
Geosciences, Multidisciplinary
Evandro L. Klein, Elem C. S. Lopes, Joseneusa B. Rodrigues, Sulsiene M. Souza-Gaia, Umberto G. Cordani
GEOSCIENCE FRONTIERS
(2020)
Article
Geosciences, Multidisciplinary
Paulo Sergio de Sousa Gorayeb, Umberto Giuseppe Cordani, Juvenal Juarez Andrade da Silva Neto, Kei Sato, Victor Camara Maurer
JOURNAL OF SOUTH AMERICAN EARTH SCIENCES
(2020)
Article
Geology
Alvaro Rodrigo Iriarte, Umberto G. Cordani, Kei Sato
Summary: The Cordillera Real granitoids in the Eastern Cordillera of the Central Andes of Bolivia are a suite of Triassic and Oligocene plutons with unique tectonic setting and chemical compositions, forming part of the Inner Magmatic Arc. Age data obtained from U-Pb SHRIMP analysis revealed crystallization ages for both Triassic and Oligocene granitoids. Zircon inheritance was found in the Triassic granites, indicating a provenance from early Paleozoic metapelites with recycled older sources influenced by the Gondwanide orogeny.
Article
Geosciences, Multidisciplinary
Alvaro Rodrigo Iriarte, Umberto Giuseppe Cordani, Miguel Basei
Summary: Detrital zircon from Ordovician sandstones and inherited zircon cores in granitoids show a statistical correlation, suggesting assimilation of sedimentary units by felsic melts. Inherited zircons have ages ranging from 300 to 2300 Ma, with potential sources including the Brasiliano or Pampean belts and recycling from pre-existing sedimentary rocks.
BRAZILIAN JOURNAL OF GEOLOGY
(2021)
Article
Geosciences, Multidisciplinary
B. Ribeiro, P. A. Cawood, F. M. Faleiros, J. A. Mulder, E. Martin, M. A. Finch, M. Raveggi, W. Teixeira, U. G. Cordani, M. Pavan
PRECAMBRIAN RESEARCH
(2020)
Article
Geosciences, Multidisciplinary
Umberto G. Cordani, Thomas R. Fairchild, Carlos E. Ganade, Marly Babinski, Juliana de Moraes Leme
BRAZILIAN JOURNAL OF GEOLOGY
(2020)
Article
Geosciences, Multidisciplinary
Marcelo Lacerda Vasquez, Umberto Giuseppe Cordani, Kei Sato, Jaime dos Passos de Oliveira Barbosa, Maria Telma Lins Faraco, Victor Camara Maurer
BRAZILIAN JOURNAL OF GEOLOGY
(2019)
Article
Geosciences, Multidisciplinary
Umberto Giuseppe Cordani, Alvaro Rodrigo Iriarte, Kei Sato
BRAZILIAN JOURNAL OF GEOLOGY
(2019)
Article
Geosciences, Multidisciplinary
Carolina Deluca, Antonio Pedrosa-Soares, Sirlene Lima, Umberto Cordani, Kei Sato
BRAZILIAN JOURNAL OF GEOLOGY
(2019)